-->Paper-based Composite Materials

3D Printed Preparation and Properties of Carbon Nanotube/Nanocellulose Composite Electrode

ZHANG Sufeng,WANG Xiaoyi,LIU Yali,HE Xinning — 2024/4/11 18:55:07

This study explored a visible light-based 3D printing technology for the fabrication of conductive polymer resin materials. A mixture of light-curable resin and multi-walled carbon nanotube （MWCNT） was used as the substrate， and the dispersibility of MWCNT was improved by adding nanocelluloses （CNF） to achieve the best electrical conductivity and printing quality of the hybrid resin. In addition， light curing， pyrolysis， and chemical activation were combined to form carbon electrodes with designable hierarchical pore structures. The electrodes had pore structures with a distribution from millimeter to micron to nanometer scale， and assembled symmetric supercapacitors were provided a high energy density of 0.91 mWh/cm².

Preparation and Properties of Aramid Ⅲ Paper-based Composite Materials

LIAO Sihuang,SONG Zizhi,LONG Jin,WANG Yi,XIONG Zhiyuan,HU Jian — 2024/4/11 18:55:08

Aramid Ⅲ paper-based composite materials were prepared from aramid III chopped fibers and meta-aramid fibrids using wet molding technology to study the effects of aramid III chopped fiber length and percentage on the homogeneity， tensile strength， modulus of elasticity， elongation at break， and tearing strength of aramid III paper-based composite materials. The results showed that when the aramid Ⅲ chopped fiber length was 6 mm and the percentage was 50%， the comprehensive mechanical properties of aramid Ⅲ paper-based composite materials were better， among which the tensile strength was 2.66 kN/m， the elastic modulus was 3 136 MPa， the elongation at break was 1.78%， and the tearing strength was 2 912 mN. The tensile fracture surfaces of paper-based composite materials showed different shapes due to the difference of the length and percentage of the aramid Ⅲ chopped fibers. Compared with the meta-aramid paper， the aramid III paper-based composite materials had better high-temperature dimensional stability， which was expected to further enhance the application prospect of aramid in the field of composite reinforcement.

Study on the Effect and Mechanism of Impregnation and Hot Pressing Process on the Structures and Properties of Carbon Paper

2024/4/11 18:55:10

The phenolic resin distribution and morphological structure during the impregnation and curing process of carbon paper were studied， exploring the effect of impregnation and hot pressing process on the properties of carbon paper. The results showed that the maximum impregnation increment of phenolic resin for pre-impregnated carbon paper was up to 154.9% when the impregnation time and phenolic resin concentration were 4 min and 11%， respectively. The prepared carbon paper after hot-pressed had the best performance when the hot pressing temperature， time and pressure were 160 ℃， 20 min and 3.0 MPa， respectively， of which the resistivity and tensile strength of carbon paper were 27.1 mΩ·cm and 103.9 N/cm， respectively.

Preparation of Acid-doped PANI Electrode Materials and Its Electrochemical Properties

WANG Yanting,LI Penghui,FANG Manyu,WU Wenjuan — 2024/4/11 18:55:11

In this study， aniline was used as the monomer， ammonium persulfate as the oxidizing agent， phytic acid as the dopant acid， and lignosulfonate were chemically polymerized to synthesize lignosulfonate/polyaniline （LS/PANI） electrode materials with the good electron-conducting ability and excellent capacitance. The LS/PANI electrode materials were analytically characterized by using Field Emission Scanning Electron Microscope （FESEM）， Fourier-transform Infrared Spectrometry （FT-IR）， and Brunauer-emmett-teller （BET）. The electrochemical properties of LS/PANI electrode materials were tested by cyclic voltammetry，alternating current impedance， etc. The results showed that LS/PANI electrode materials as the electrode material had good capacitance performance and good cycling stability. Their specific capacitance could reach 509.3 F/g at a current density of charge/discharge of 0.5 A/g， and the capacitance could be retained by 63.23% after cycling for 5 000 times at a charge/discharge current density of 10 A/g.

Preparation and Properties of Graphene Oxide/Rhodamine 6G Modified Filter Paper

FAN Jiang,ZHANG Sufeng — 2024/4/11 18:55:12

The paper-based sensor FP/GO/R6G-PEI was prepared by physically modifying the filter paper （FP） with graphite oxide （GO） and rhodamine 6G-polyethyleneimine （R6G-PEI）. The morphology， mechanical properties， and sensing performances of FP/GO/R6G-PEI were characterized by scanning electron microscope， X-ray diffraction，servo material multi-functional high and low temperature control testing machine， UV-vis spectrometer， and PL spectrometer. Compared with FP and FP/GO， the surface smoothness and mechanical property of FP/GO/R6G-PEI increased， while the air permeability decreased. When FP/GO/R6G-PEI was immersed in Fe³⁺ solution， it was observed that FP/GO/R6G-PEI turned pale pink， and the fluorescence intensity was significantly enhanced， which realized the visual detection and fluorescence detection of FP/GO/R6G-PEI to Fe³⁺ in water. The energy gap between Structure 3 and Fe³⁺ （0.53 eV） was obviously smaller than that of Structure 3 （3.12 eV）， indicating that the chelating system was more stable after the interaction of structure 3 with Fe³⁺.

Study on the Effect of Formation Index on the Strength and Pore Properties of Carbon Paper-base Paper

2024/4/11 18:55:14

In this study， carbon fiber was used as raw material to prepare carbon paper-base paper with different formation properties by changing the type of dispersant， the dispersion stability and uniformity of carbon fiber suspension were investigaled， and the relationship between formation index and permeability， tensile strength and porosity was discussed. Compared with single APAM， TOCNs and PU dispersants， the dispersion stability and uniformity of carbon fiber suspension dispersed by composite dispersants system composed of 0.1% APAM and 1% PU were improved， which had the best formation index of 10.32. With the decrease of formation index， the thickness deviation of carbon paper bas-paper decreased from 21.76 mm to 0.96 mm， the tensile strength increased from 0.15 kN/m to 1.68 kN/m， the porosity decreased from 93.5% to 90.5%， and the permeability decreased from 1 658.9 L/（m²·s） to 1 171.5 L/（m²·s）.

Preparation and Properties of Polysulfonamide Based Li-S Batteries Separator

ZHANG Sufeng,HE Xinning,LI Lei,LI Nan,WANG Xiaoyi,YAN Xueyan — 2024/2/29 11:22:32

A-PSA separator was prepared via phase transformation method using aromatic sulfone （PSA） fiber without loss of its thermal stability （shrinkage of 0 at 200 ℃）， which showed asymmetric pore structure （positive side pore size less than 2 nm）. Alkalization treatment improved electrolyte infiltration （340.5%） and electronegativity of the A-PSA separator. The space barrier and electrostatic shielding cooperative strategy was used to limit the shuttle of polysulfide. The results showed that Li-S batteries equipped with A-PSA separator had a lower electrochemical impedance and higher ionic conductivity （1.23 mS/cm）， with the capacity retention rate （89.1%） was higher than that of PP separator （58.7%） after 100 cycles.

Progress of Simulation of Gas Diffusion Layer and Fuel Cell by COMSOL

LI Chongchao,ZHAO Haoxuan,HUANG Yike,HUANG Liangyu,GUO Daliang — 2024/2/29 11:22:33

The research progress of the simulation of proton exchange membrane fuel cell using COMSOL software was summarized in this paper， the influence of substrate layer（carbon paper layer） and entire gas diffusion layer characteristics（geometric parameters， porosity， etc.） and operating conditions（pressure， etc.） on the performance of the battery were analyzed. The fuel cell operating conditions（temperature， voltage， etc.）， water management， battery flow field structure design and performance evaluation were reviewed， in order to provide reference for the structural design of gas diffusion layer and the performance optimization of battery.

Research on Preparation and Properties of Paper-based Materials for Electromagnetic Shielding with Low Reflection

WU Juan,TAN Jiaojun,ZHANG Meiyun,CHEN Xu,XU Jinge,LI Fangfang — 2024/1/20 16:30:17

In this study， a series of carbon fiber papers with different conductivity were prepared by milling pretreatment and wet-forming from carbon fiber and hardwood pulp fiber. And then， these papers were laminated with epoxy film to obtain composite carbon fiber paper （MCFP） with gradient structure. The electromagnetic shielding performance， mechanical properties， and conductivity of MCFP were investigated. The results showed that the gradient and multilayer structure could significantly diminish incident electromagnetic wave reflection while enhancing the absorption of internal reflections. Consequently， the MCFP demonstrated superior electromagnetic shielding with low reflectance characteristics. The total shielding efficiency of MCFP reached 45 dB， and the absorption coefficient was up to 0.67 under optimized conditions. At the same time， the carbon fiber endowed the MCFP with excellent electro-thermal performance， and the surface temperature could reach 147 ℃ with a supplied voltage of 6 V.

Preparation and Characterization of Lyocell Fiber Porous Buffer Materials by Foam Forming

ZHAO Shiting,WANG Xiwen — 2024/1/20 16:30:18

This study introduced a method of preparing porous buffer materials by foam forming technology. At the same time， the mechanical properties of Lyocell fiber buffer materials were improved by adding PET fiber and styrene acrylic lotion. The results showed that when the fiber concentration was 3%， pH value was 7， sodium dodecyl benzene sulfonate （SDBS） was used as foaming agent， and the pure Lyocell fiber buffer material was reinforced with mass fraction 3% styrene acrylic， the elastic modulus could be increased from 37.30 kPa to 116.12 kPa. When using mass fraction 9% styrene acrylic for reinforcement， set the mass ratio of control Lyocell fiber to PET fiber （fineness of 17 dtex） was 1∶1， the elastic modulus was 46.99 kPa， and the density was 0.030 g/cm³， which could ensure lightweight of the buffer material and greatly improve resilience. The disintegrability test of the buffer materials showed that the pure Lyocell fiber buffer materials and the Lyocell fiber/styrene acrylic emulsion reinforced buffer materials also had certain degradability.

Study on the Properties of Waste Paper Fiber/Starch Composite Foam-based on Thermally Expandable Microsphere Foam Material

ZHANG Xiaolin,CHEN Chao,LI Na,XIONG Lizhen,ZHOU Ziang — 2024/1/20 16:30:19

In this paper， DPWPF/CS composite foams were prepared by heating baking with corn starch （CS） and digital printing waste paper fiber （DPWPF） as the substrate and thermally expandable microsphere （EHM204） as the blowing agent， and the effects of the DPWPF dosage on various properties of DPWPF/CS composite foams were investigated. The results showed that thermally expandable microspheres could be used as foaming agents in the preparation of DPWPF/CS composite foaming materials， and the addition of appropriate amount of DPWPF could improve the mechanical properties of starch-based foaming materials， and when the dosage of DPWPF was 15% （with respect to the mass of CS）， the prepared foaming materials had the best overall performances， with the density of 0.66 g/cm³， foaming rate of 70%， hardness of 70.00 HC ， elastic specific energy of 14.25×10⁴ J/m³， buffer coefficient of 4.21， and resilience of 95.1%.

Effects of Fibrid Length on the Performances of Meta-aramid Paper

ZHU Wenhao,SONG Huan,DING Ping,YANG Qing,WANG Jin,HOU Jianzhong,YANG Jun — 2024/1/20 16:30:20

In this study， the meta-aramid fibrids （referred to as fibrids） with different length were obtained by trough beater， the meta-aramid blended papers （referred to as blended papers） were prepared by wet-laid process after mixing with the meta-aramid chopped fibers， and the effects of fibrid length on the performances of blended papers were investigated. The results showed that with the decrease of the fibrid length， the air permeability of the blended paper first decreased and then increased， the tensile strength， the elongation at break， and the electrical strength first increased and then decreased. When the fibrid length was 0.9 mm， the performances of the blended paper were the best： the air permeability of 2.59 μm/（Pa·s）， the tensile strength of 863 N/m， the elongation at break of 2.54%， and the electrical strength of 6.82 kV/mm.

Study on Modeling and Prediction of Carbon Paper Base Paper Properties Based on GA-BPNN Algorithm

ZHANG Meng,HUANG Yike,YUAN Qidong,ZHAO Haoxuan,HUANG Liangyu,GUO Daliang — 2024/1/20 16:30:22

In this study， carbon paper base paper was prepared by changing carbon fiber length， carbon fiber /PVA fiber mass fraction， dispersant dosage and other process parameters.The influences of different process parameters on tensile strength， porosity， air permeability， and resistivity were explored. In addition， genetic algorithm was used to improve the back-propagation neural network algorithm （GA-BPNN algorithm）， to construct a performance prediction model of carbon paper base paper. The results showed that the length of carbon fiber was positively correlated with the tensile strength， porosity， and air permeability of carbon paper base paper， and negatively correlated with the electrical resistivity. The mass fraction of carbon fiber to PVA fiber was negatively correlated with the tensile strength of carbon paper base paper， but positively correlated with porosity， permeability， and resistivity. The dosage of dispersant was positively correlated with the tensile strength and resistivity of carbon paper base paper， but negatively correlated with the porosity and permeability of carbon paper base paper. The mean relative error （MRE） of the prediction models for the tensile strength， porosity， permeability， and resistivity of carbon paper base paper were 5.49%， 5.75%， 5.21%， and 5.54%， respectively， and the MRE of the prediction models were all less than 10%， which was consistent with the relationship trend of the experimental process parameters on the properties of carbon paper base paper.

Construction of Nano-conjugated Carbon Material Coatings with Ellagic Acid/Fe³⁺ Oligomers and Their Applications

LIAO Liqiong,CHEN Xin,LI Kai — 2025/9/25 16:39:27

In this study， ellagic acid (EA) and FeCl₃·6H₂O were used as raw materials to construct EA/Fe³⁺ oligomers through coordination interactions. These oligomers were combined with nano-conjuated carbon materials (graphene， carbon nanotubes) via π-π stacking interactions to prepare aqueous-phase stable functional nanocarbon material dispersions. By adjusting the pH and EA mass fraction， the particle size distribution， Zeta potential， and microstructure of the dispersions were systematically investigated， and the dispersions were applied to chitosan hydrogel coatings and lithium battery anode materials. The results showed that the EA/Fe³⁺ oligomers significantly improved the dispersibility of nano-conjuated carbon materials through coordination interactions and steric hindrance effects. The coatings exhibited excellent electrical conductivity (1.57×10^-1 S/m) and piezoresistive response characteristics. When EA/Fe³⁺/carbon nanotubes were used as lithium battery anodes， the specific capacitance could reach 26.75 F/g.

Research Progress on the Performance Optimization and Application of Gas Diffusion Layers for Proton Exchange Membrane Fuel Cells

LUO Jiawen,CAO Mei,GUO Dingwen,GUO Daliang — 2025/9/25 16:39:28

The gas diffusion layer (GDL) of a proton exchange membrane fuel cells (PEMFC) primarily consists of a carbon paper layer and a microporous layer (MPL)， which directly influences the mass transfer efficiency and performance stability of the fuel cell. This paper reviewed the application forms of novel GDL， including ultra-thin， flexible， and integrated types， and introduced research progress on enhancing the water management capability， conductivity， and mechanical properties of the carbon paper layer and MPL through technology improvements and material optimization. Based on the application requirements of GDL， the paper summarized technical strategies for improving water vapor transport performance by optimizing pore structure， adjusting component ratios， and designing contact interfaces， as well as enhancing corrosion resistance and durability of GDL through different coating technologies. Finally， the future development directions of GDL were outlined.

Waste‐Separator‐Derived Carbon and Its Synergistic Enhancement of Recycled Graphite for Lithium‐Ion Batteries

QIAO Huali,LI Yudan — 2025/9/25 16:39:28

This study proposed an efficient strategy for upgrading polyolefin separators obtained from the disassembly of scrap lithium-ion batteries into high-value carbon materials. The results indicated that the separator-derived carbon exhibits a layered structure with the coexistence of ordered and disordered regions. When used as an anode material， it achieved a specific capacity of 695 mAh/g at a current density of 100 mA/g， exceeding twice that of recycled graphite. Although the conversion efficiency and product yield of the carbonization process still need optimization， its exceptional electrochemical lithium storage performance significantly enhanced the capacity of recycled graphite even with a small amount of addition. The composite electrode based on recycled graphite and separator-derived carbon demonstrates superior lithium-ion diffusion characteristics and capacity stability： after 1 200 cycles at a 0.5 C rate， the composite material maintained a stable discharge capacity of 380 mAh/g， while the single recycled graphite only achieved 285 mAh/g.

Use of Polyurethane for Interface Control to Improve the Toughness of Carbon Paper

ZHAO Shuangshuang,MENG Ling,LI Hailong,CHEN Dong — 2025/9/4 11:46:07

In order to improve the toughness of carbon paper （CP）， this study employed thermoplastic polyurethanes (TPU) to construct multi-layer interfaces during the CP molding process to reduce the interfacial bonding strength between carbon fiber and resin carbon. The results showed that TPU could fill the grooves on the surface of carbon fiber and reduce the surface roughness. With the increase of TPU content， the average pore size of CP increased， the surface conductivity remained basically unchanged， the surface roughness and fracture toughness showed a trend of increasing first and then decreasing. When the TPU mass fraction was 49.8%， the fracture toughness of CP increased by 99.8% compared with the unmodified CP， the average pore size increased by 35.2%， and the surface roughness reduced from 28.1 μm to 26.2 μm. The improvement in CP toughness was attributed to the energy dissipation caused by fiber pull-out and debonding. Under conditions of 100% relative humidity， the limiting current density and power density of a single cell reached 1.28 A/cm² and 347.8 mW/cm²， respectively， achieving the fuel cell performance of commercial CP.

Study on the Distribution of Resin in Paper-based Friction Materials

WANG Yuxiang,ZHAO Xintao,ZHANG Chunhui — 2025/9/4 11:46:07

Structure and properties of paper-based friction materials are essentially affected by their surface and internal resins， and the uniformity of resin distribution determines the interaction among the internal components of paper-based friction materials， thus affecting the overall physico chemical properties. In order to realize the uniform distribution of resin in paper-based friction materials， the effect of resin content on the Z direction distribution (from mesh to blanket) of resin in paper-based friction materials was investigated. The results showed that with the increase of resin solution mass fraction， the resin content of paper-based friction materials increased， and the porosity and average pore size decreased. According to the difference of X-ray absorption degree of each component in paper-based friction material， the resin content was measured. When the resin content was low and the volume proportion was about 7%， the resin was evenly distributed in the Z direction of the paper-based friction material. With the increase of resin content， due to the uneven distribution of fibers， fillers， and pores in the base paper， the Z direction distribution of the resin in the paper-based friction material was uneven， and the two-sided difference of the resin content of the paper-based friction material increased. When the resin content in the paper-based friction material was high， the resin further occupied the available space occupied by air inside the paper-based friction material， resulting in the continuous increase of the resin inside the paper-based friction material， but the difference between the two sides of the resin content was only 0.5%.

Study on Synergistic Mechanism of Structure and Properties of Cationized Pulp Regulated by Lignin Content and Strengthening of Its Antibacterial Function

WANG Weizhuang,LI Zhiqiang,YAN Chenyang,WU Hao,LI Qun — 2025/9/4 11:46:08

This study used chemi-mechanical bamboo pulp as raw material and adjusted lignin content （2.47%~18.67%） through acidic sodium chlorite treatment， followed by cationized modification using 2，3-epoxypropyltrimethylammonium chloride （EPTAC） as etherifying agent. The structure and properties of modified pulp were systematically characterized. The results showed that quaternary ammonium groups were successfully grafted onto pulp by EPTAC， with significantly increased Zeta potential. Lignin content showed positive correlation with degree of cationized substitution （DS of HPY0 was 0.098， decreasing to 0.078 for HPY180）. Antibacterial tests demonstrated that the inhibitory effect of cationized pulp against E.coli and S.aureus significantly enhanced with increasing lignin content， attributed to the natural antibacterial properties of lignin， physical piercing effect of large-sized nanofibers in high-lignin systems， and synergistic effect of cationized charges.

Controlled Fabrication of Cellulose Filter Paper-based Ceramic Composite Separators and Their Application in Lithium-Ion Batteries

LI Juan,PANG Xiaolan — 2025/9/4 11:46:08

In this study， a cellulose filter paper-based ceramic composite separator was fabricated by constructing a chitosan/polyvinyl alcohol/barium titanate multifunctional coating on low-cost paper substrates through an in-situ wet-coating technique. By regulating the dispersion of ceramic fillers and the polymer cross-linking network， the controllable construction of a three-dimensional porous structure for the composite separator was successfully achieved.The results showed that when the mass fractions of chitosan， polyvinyl alcohol， and barium titanate were 0.25%， 1.0%， and 0.1%， respectively， the as-prepared composite separator exhibits exceptional comprehensive performance： enhanced thermal stability at 200 ℃ with no dimensional shrinkage， a first-cycle discharge specific capacity of up to 118.69 mAh/g at 0.5 C in full-cell configuration， and an ultra-low charge transfer resistance of merely 6.87 Ω for the stainless steel/composite separator/half-cell.

Research Progress on the Application of Noble Metal Catalysts in Fruit and Vegetable Preservation

WANG Jian,LI Hongcai,ZHANG Hao,SU Yanqun,LIU Haoquan,XIAO Guihua — 2025/9/4 11:46:09

Efficient removal of excess ethylene is crucial for extending the shelf life of fruits and vegetables. Noble metal-based low-temperature （0~25 ℃） catalytic oxidation technology has demonstrated significant potential advantages in cold-chain preservation due to its mild reaction conditions， absence of secondary pollution， and controllable operational costs. This paper summarized recent advances in catalytic mechanisms， performance optimization strategies， and anti-deactivation approaches for platinum （Pt）， silver （Ag）， and gold （Au）-based catalysts in ethylene oxidation. By addressing current industrial challenges， this paper proposed future development directions to provide theoretical support and innovative insights for constructing stable and efficient ethylene removal systems using noble metal catalysts.

Preparation and Thermal Energy Storage Performance of High Thermal Energy Density MNCMF-CNT-PW Phase Change Composites

CHEN Jinxuan,HE Yingying,CHEN Gang — 2025/7/22 20:41:13

This study employed a vacuum impregnation method to prepare carboxymethylated cellulose fiber （CMF）-carbon nanotube （CNT）-paraffin wax （PW） composites with high phase change enthalpy. First， uniformly dispersed MNCMF-CNT aqueous solutions were prepared via high-speed shearing. Then， MNCMF-CNT aerogels with a porous structure were obtained by freeze-drying， with CNT uniformly distributed on the pore walls. Finally， the aerogels were vacuum-impregnated with PW， filling their pores and forming stable MNCMF-CNT-PW composites. The results showed that the incorporation of CNT improved the thermal conductivity of the phase change material from 0.283 to 0.327 W/(m·K). Additionally， MNCMF-CNT2-PW52 displayed high phase change enthalpy and latent heat retention， which made by paraffin wax with melting temperature of 52~54 ℃， with melting and crystallization enthalpies of 217.7 and 217.9 J/g， respectively， and a latent heat retention rate of 97.9%. Furthermore， MNCMF-CNT2-PW52 composites effectively collected， stored， and released thermal energy. When combined with a thermoelectric generator， they output electric energy consistently.

Research Progress on Performance Optimization of Carbon Paper Based Gas Diffusion Layer

SI Yijie,JIA Lingbo,CHEN Jiwei,CAO Mei,GUO Daliang — 2025/7/22 20:41:14

Proton exchange membrane fuel cells（PEMFCs） have attracted much attention due to their advantages of high efficiency， low noise， and non-polluting property. However， there are still many problems that need to be solved urgently， such as the complex water management system， weak medium transport capability， short service lifetime， poor stability， and high catalyst cost. Optimizing the performance of the carbon paper based gas diffusion layer （GDL） has become the key to improve the efficiency and service life time of fuel cells. In this paper， recent research progress on carbon paper-based GDL was reviewed， covering new GDL preparation processes with laser perforation and patterning designs， carbon paper modification with graphene and nanofibers to enhance mechanical strength， electrical conductivity， void uniformity， and graded porous structures， and improvements in water management and mass transfer performance with Teflon hydrophobic agent， with the aim of providing a reference for the future development of PEMFCs.

Applications Status and Development Trend of Paper-based Packaging in Food Field

2025/7/22 20:41:19

In recent years， the pollution problem of plastic food packaging has become more and more serious. It is necessary to find environmentally friendly packaging alternatives. Paper-based packaging has attracted much attention because of its excellent environmental protection performance， which will be the future development mainstream in the packaging food field. This paper briefly introduced the classification and characteristics of paper-based packaging， focused on the application status of paper-based packaging in the food field， and summarized its research on new material development and performance improvement. The advantages and challenges of paper-based packaging in food application were discussed. Finally， its development prospects were forecasted.

Study on Preparation and Performance of Antibacterial Absorbent Sanitary Materials

NIU Junjie,WANG Xiaoyong,QIU Yetong,ZHANG Cuiqian,LIU Zehua — 2025/7/22 20:41:19

In this study， modified fiber （CRF） was prepared by mechanical treatment of tempo oxidized cellulose with colloidal mill， and a new type of absorbent sanitary material （CRF-PMLA-Ag-SAM） with good antibacterial properties was prepared by polymerization with acrylic acid （AA）， poly malic acid （PMLA）， and silver nitrate （AgNO₃） under UV light. The results showed that CRF， AA， and PMLA were successfully copolymerized， and Ag existed in two valence states of Ag⁺and Ag⁰. At the addition amount of 15% CRF， the CRF-PMLA-Ag-SAM prepared with the addition amount of 1% PMLA and 1% AgNO₃ had good absorption retention rate for normal saline， with water absorption rate of 128 g/g and water retention rate of 76 g/g， which had obvious inhibitory effect on Staphylococcus aureus and Escherichia coli， and the diameter of inhibition zone was 9.5 and 9.8 mm， respectively.

Study on the Effect of Fiber Size Classification on Water Filtration Properties of Filter Paper

JIANG Jiewei,YANG Dong,TANG Min,HU Jian,LIANG Yun — 2025/6/23 17:29:06

In this study， glass fiber and aramid fiber were used as the research objects， and the fibers were size graded by Bauer sieve instrument. The changes in the morphology， length， and diameter of the different sieving segments were analyzed in the experiment. The results showed that the average diameter， maximum diameter， and length of the fibers decreased significantly with the decrease of the pore size of screening mesh. At the same time， the fiber diameter dispersion decreased， the standard deviation coefficient of glass fiber diameter decreased from 103.9% to 74.5%， and the standard deviation coefficient of aramid fiber diameter decreased from 188.0% to 92.9%. Therefore， the surface flatness of the filter material was improved and the pore size distribution was more concentrated. The fiber size classification had different effects on the water filtration performance of different fiber filter materials. Specifically， the maximum filtration efficiency of the fiber filter paper of the aramid fiber that did not pass through the sieve plate with a pore size of 0.600 mm for 0.3 µm particles was 60.33%. With the decrease of the sieve plate pore size， the filtration efficiency of the filter paper for 0.3 µm particles decreased. The filtration efficiency of the fiber filter paper with glass fiber passing through a 0.075 mm sieve plate for 0.3 µm particles was the highest at 43.46%. As the aperture of the sieve plate decreases， the filtration efficiency of the filter paper for 0.3 µm particles increased.

Research Progress of Microencapsulation Technology and Its Application in Specialty Paper

FAN Ruiting,SUN Siyu,WAN Ying,LIU Wen,LI Hongkai,ZHANG Meiwen — 2025/6/23 17:29:07

Microencapsulation technology， as an advanced encapsulation technique， has become a research hotspot in the contemporary world. Microencapsulation technology can significantly improve the performance and functions of specialty paper by microencapsulating functional substances. In the field of specialty paper，microencapsulation technology is mainly applied to flame retardant， carbonless copying， fragrance release， etc. The continuous development of microencapsulation technology offers a vast scope for the innovation and application of specialty paper， and promotes the technological advancement and product diversification in the specialty paper industry. This paper introduced the excellent characteristics of microcapsules， the classification of commonly used wall materials， and main preparation techniques. It focused on elaborating the application of microcapsules in the specialty paper field， as well as the basic requirements for indicators and performance during the production process of specialty paper incorporating microcapsules. Additionally， it provided an outlook on the application prospects of microencapsulation technology in the specialty paper field.

Investigation of Preparation and Performance of Flame-retardant Coated Paper

ZHAO Xin,WANG Zhiliang,XU Miaojun,DU Yezhuang,LIANG Dequan,PAN Gaofeng — 2025/6/23 17:29:08

In this study， the aqueous flame-retardant coating was prepared derived from the film-forming of soluble starch， and the flame-retardant additive of ammonium sulfate and ammonium dihydrogen phosphate. Then， the flame-retardant coating was coated on the surface of paper with a basis weight of 60 g/m². When the mass ratio of starch， ammonium sulfate， and ammonium dihydrogen phosphate was 3∶1∶2， the content of flame-retardant additive of the coating was 5%， and the coating amount was 2.0 g/m²， the damage ratio of the flame-retardant coated paper in the vertical combustion test decreased from 100% of the raw paper to 35.9%， and the limiting oxygen index increased from 18.3% to 30.0%. The acids produced by the decomposition of flame-retardant additive exerted catalytic carbonization for cellulose and starch， and the non-flammable gas caused by the decomposition of nitrogen-containing groups diluted the combustibles and oxygen. Consequently， the flame-retardant coated paper was endowed excellent flame-retardant performance. Besides， the tear strength of the flame-retardant paper 4^# was increased from 308 mN for raw paper to 339 mN， and the tensile strength was well retained.

Effects of Surfactant Type on the Structure and Properties of Quartz Fiber Foam Forming Paper Sheets

XIA Liqi,HOU Fuqing,HUANG Mengle,ZHANG Chunhui — 2025/6/23 17:29:09

In this study， quartz fiber was used as the raw material， and foam forming technology was adopted to investigate the effects of changing the type and mass concentration of surfactants on the properties of quartz fibre foam slurry system， the properties of quartz fiber paper， and the wettability of silica sol to quartz fiber paper. The results showed that the sodium dodecylbenzene sulfonate （LAS） system at mass concentration of 3.0 g/L had the best foam properties with air content of 76%， bubble size of 107.0 μm， and half-life of 319 s. The surface homogeneity index of quartz fiber paper under the dodecyldimethylamine oxide （OB-2）-carboxylated cellulose nanofibers （CNF）-quartz fiber system at mass concentration of 3.0 g/L was the best at 122. The tensile strength of quartz fiber paper under the poly（vinyl alcohol）（PVA）-quartz fiber system at mass concentration of 5.0 g/L was the highest at 0.99 kN/m. The amount of surfactant residue inside the quartz fiber paper was mainly affected by the mass concentration of the surfactant in the foaming initial liquid， and the higher the initial mass concentration， the greater the adsorption of surfactant on the surface of the quartz fiber paper. At the same time， increasing the dosage of surfactant was conducive to reducing the contact angle between quartz fiber and silica sol， which in turn helped to improve the bonding between silica sol and paper.

Preparation and Antibacterial Properties of Pterostilbene Derivatives Antibacterial Paper

YAO Donghao,ZOU Jie,LIU Pengke,WANG Lei,WANG Xiaohui — 2025/5/26 17:48:22

Three antimicrobial materials were synthesized via organic synthesis based on the natural biomass compound Pterostilbene. Among them， material Z6 prepared with N，N-Dimethy Wexylamine exhibited significant inhibitory activity against Staphylococcus aureus at concentration below 1 µg/mL. Subsequently， the antimicrobial material with the best performance was incorporated onto softwood fibers using impregnation method， resulting in an antimicrobial paper loaded with the optimized Pterostilbene derivative. The results showed that the prepared antimicrobial paper achieved efficient bacterial inhibition at an impregnation concentration of 1 mg/mL， with the inhibition zone diameter increasing by 88% compared to the control group. Furthermore， the antimicrobial material was uniformly distributed on the softwood fiber surface without compromising the structural integrity of the paper substrate， and the overall cost remained optimal.

Study on Reinforcement Technology of Yarn Paper

2025/5/26 17:48:25

Yarn paper was prepared using 100% bleached kraft softwood pulp as raw the material， and the effects of preparation technology and waterborne polyurethane （WPU） impregnation on the mechanical properties of yarn paper were investigated. The results showed that the optimal mechanical properties were obtained when the fiber beating degree reached 45 °SR， the dosage of cationic starch （CS）， amphoteric polyacrylamide （AmPAM） and polyamide epichlorohydrin （PAE） was 1.0%， 0.5‰ and 1.0% respectively， the dosage of MFC was 0.5%， and the amount of WPU impregnated was 0.5 g/m². The longitudinal tensile index and transverse tensile index of the yarn paper prepared under these conditions were 118 and 23.8 N·m/g， respectively， and the longitudinal elongation at break was 4.3%.

Preparation of Vanilla Essential Oil Microcapsules and Their Application in Cigarette Paper

2025/5/26 17:48:26

This study employed the complex coacervation method to prepare vanilla essential oil microcapsules， using vanilla essential oil as the core material， chitosan as the wall material， and Span-80 as the emulsifier. The encapsulation efficiency， moisture content， and solubility of the microcapsules were measured， and their physicochemical properties were characterized. The sustained-release performance of the vanilla essential oil microcapsules was investigated， followed by an accelerated test to evaluate their weather resistance. Finally， the microcapsules were applied for fragrance enhancement on cigarette paper.The results showed that the chitosan could successfully encapsulate vanilla essential to prepare vanilla essential oil microcapsules， and the vanilla essential oil microcapsules had an average particle size of 482 nm， an encapsulation efficiency of 41.1%， a moisture content of 7.2%， and a solubility of 46.2%. The vanilla essential oil microcapsules exhibited good thermal stability， with a mass loss of only 4.2% after 13 days of storage， demonstrating effective sustained-release properties.Accelerated testing revealed that storage temperature significantly affected their weather resistance. When stored at lower temperatures （25 and 4 ℃） for 10 days， the mass loss remained below 30%. However， at 60 ℃， the mass loss reached a maximum of 36.2% after 10 days， indicating that vanilla essential oil microcapsules were unsuitable for storage in high-temperature environments. Sensory evaluation of cigarettes showed that adding vanilla microcapsules to cigarette paper improved the overall smoking experience compared to untreated cigarettes. At an addition amount of 2.0%， the microcapsules enhanced the aroma intensity， imparted a sweet fragrance， reduced irritation， and provided a more pleasant aftertaste， resulting in superior sensory performance.

Effects of Steam Blasting Treatment on the Physical Properties and Organoleptic Quality of Reconstituted Tobacco Base Sheets

2025/5/26 17:48:27

Steam blasting technology was used to pretreat tobacco stems， and the microstructure and chemical composition of tobacco stems， as well as the physical properties of the reconstituted tobacco base sheets and the organoleptic quality of reconstituted tobacco sheets under different steam blasting pretreatment conditions were studied. The results showed that the maintained steam blasting pressure exerted considerable effects on the microstructure of tobacco stems and the physical properties of the reconstituted tobacco sheets. As the maintained steam blasting pressure rising， the microstructure of tobacco stems expanded， the void and gap spaces enlarged and increased. After beating， the beating degree of tobacco stem pulp increased， compared with untreated sample， the tensile index of the reconstituted tobacco base sheets could be increased by up to 1.65 times， the uniformity was increased by 60%， and the softness was increased by 22%， but it had a relatively small effect on bulk. When the maintained steam blasting pressure was 0.6 MPa， the microstructural damage of the tobacco stem was not obvious， and the water-soluble total sugar content was increased by 11.6% compared with that of the raw material， which could significantly improve the organoleptic quality of the reconstituted tobacco sheets. Appropriate steam blasting treatment of tobacco stems could significantly improve the physical properties of the reconstituted tobacco base sheets and organoleptic quality of reconstituted tobacco sheets， and the maintained steam blasting pressure should be lower than 0.6 MPa in industrial application.

Influence of New Dipping and Hot Pressing Process on the Properties of Paper-based Friction Materials

LU Anan,ZHOU Wenling,LIAO Xiangyu,LIN Mingcen,ZHANG Chunhui — 2025/4/27 15:20:40

To solve the problem of resin damage in hot pressing process， this study explored a new dipping and hot pressing process， and compared it with the single dipping process and the dual dipping process， and analysed the effects of the new process on the structure， mechanical properties， and friction and wear properties of paper-based friction materials. The results showed that the new process could effectively avoid the destruction of the resin in the paper-based friction material during the hot pressing process. When the initial gluing amount was 7.5% and the total gluing amount was 30%， the resin and pore size in the paper-based friction material were uniformly distributed. In comparison to the paper-based friction material made by single dipping process， for paper-based friction materials P-3， the hardness reached 97.6 HRR， the shear strength was increased by 78.1% to 4.06 MPa， the thermo-mechanical properties were stable， and the variance of the average coefficient of dynamic friction at 2.96， 4.50， and 5.60 MPa were decreased by 75.1%， 71.4%， and 72.7%， respectively， and the wear rate was reduced to 0.56×10^-8 m³/（N·m）， while the friction performance remained stable at 120°C and 5.60 MPa.

Preparation and Thermal Conductivity Study of Cationized Pulp/Modified Boron Nitride Nanosheet Composite Paper

2025/4/27 15:20:41

Cationized pulp （CMCF） was prepared by reacting softwood fibers with 3-chloro-2-hydroxypropyl trimethylammonium chloride， while chitosan oligosaccharide-modified boron nitride nanosheets （COSBNNSs） were obtained via ball milling of hexagonal boron nitride with chitosan oligosaccharide as an auxiliary agent. The results showed that COSBNNSs were retained in the CMCF matrix through electrostatic adsorption， hydrogen bond， and other interactions. The introduction of COSBNNSs facilitated the formation of thermal conduction pathways. When the COSBNNSs content reached 30%， the resulting thermal conducting composite paper CMCF/COSBNNSs exhibited a maximum thermal conductivity of 2.07 W/(m·K) and a max strain of 33.66 MPa， demonstrating both high mechanical strength and thermal conductivity， making it a promising candidate for thermal management applications.

Study on Enhancing Waterproof and Oil-proof Performance of Paper-based Composites with Stearic Acid-modified Lignin-containing Cellulose Micro/Nanofibrils

WANG Wanhua,GU Xunhong,DONG Xinrui,CHEN Jiajun,YU Zhongyu,ZHENG Guibin,LI Bo — 2025/4/27 15:20:42

This study utilized unbleached eucalyptus pulp to prepare lignin-containing cellulose micro/nanofibrils （LCMNF）， enhancing their waterproof by grafting long-chain alkanes using stearic acid. These modified fibrils were then sequentially deposited on the filter paper alongside unmodified LCMNF， forming the enhancing paper-based composites with a top layer of LCMNF and a middle layer of modified fibrils in a bilayer structure. Through thermal pressing process， the LCMNF of bilayer structure was tightly bonded， improving the waterproof and oil-proof performance of the paper-based composites. The results showed that Cobb₆₀ value and air permeability of the prepared paper-based composites that depositing 8 g/m² modified and 12 g/m² of unmodified LCMNF were significantly reduced to 16.5 g/m² and ≤0.003 μm/（Pa·s）， respectively， which were 16.2% and 0.02% of those of the original paper. Meanwhile， the kit value increased from 0 to 12， demonstrating a significant enhancement in oil-proof performance.

Study on Preparation and Performances of Modified Wood Fiber Soil Water Retention Materials

WANG Xiaoyong,NIU Junjie,ZHANG Liying,QIU Yetong,WANG Huowang,LIU Zehua — 2025/4/27 0:00:00

In this study， wood powder produced during wood processing was used as the fiber source. After pretreatment by chemical thermomechanical pulping and alkaline hydrogen peroxide bleaching， modified wood fiber （CRF） was obtained by TEMPO oxidation and colloid milling. Subsequently， the composite soil water retention material （PGA-CRF/SWR） was prepared by ultraviolet polymerization with polyglutamic acid （PGA）， acrylic acid （AA）， and acrylamide （AM）. The results showed that adding CRF with the dosage of 6% could significantly improve the mechanical properties of the soil water retention material， and the compressive strength increased from 0.010 8 MPa to 0.035 1 MPa. As the dosage of PGA increased from 3% to 12%， the compressive strength further increased to 0.046 7 MPa. When the pH value was 7 and the water temperature was 30 ℃， the water absorption rate and water retention rate of PGA-CRF/SWR reached the best， and when the dosages of CRF and PGA were both 6%， the best water absorption rate of PGA-CRF /SWR in deionized water and tap water were 688.5 and 298.7 g/g， respectively， and the water retention rate were 655.7 and 277.9 g/g. After 5 cycles of water absorption and swelling， the water absorption rate could still reach 62.2% of the initial value， the residual mass after soil burial for 60 days was 79.2%， which showed good thermal stability before 309.1 ℃.

Research Progress on Functional Design of Biomolecular Active Papers

2025/4/27 15:20:46

With the theory of sustainable development as the background， the attachment mechanism of biomolecules on paper and its strategy to maintain activity and stability through immobilisation technology were introduced. The applications of biomolecular active papers in food， environment and medicine were also summarised， and biomolecular active papers were expected to be the future development direction of materials science and engineering. This paper reviewed the methods of combining biomolecules with paper and the applications of biomolecular active papers in different fields， aiming to provide a reference for the research of biomolecular active papers. The wide application potential of biomolecular active papers brings new challenges and opportunities in the fields of medical diagnosis， food safety， and environmental monitoring.

Study on the Influence of Slurry-type Reconstituted Tobacco Sheets Formula on Moisture Absorption

2025/4/27 15:20:47

This study characterized the moisture absorption of slurry-type reconstituted tobacco sheets using the equilibrium moisture content， and explored the effects of added fiber beating degree， fiber types， tobacco powder particle size， and inorganic filler types on the moisture absorption of the reconstituted tobacco sheets using the method of controlled variables. The study also optimized the preparation process of slurry-type reconstituted tobacco sheets. The results showed that the effects of added fiber beating degree， fiber types， and tobacco powder particle size on the moisture absorption of reconstituted tobacco sheets were small. Among the 5 inorganic fillers， adding bentonite was found to be effective in reducing the equilibrium moisture content of reconstituted tobacco sheets and improving its moisture absorption. As the concentration of bentonite in the thick paste increased from 0 to 2.0%， the equilibrium moisture content of the reconstituted tobacco sheets decreased. When the dosage of bentonite in the thick paste was 1.5%， the equilibrium moisture content of the reconstituted tobacco sheets were 16.7%， 15.5%， and 13.5%， respectively lower than that of the original sheet （without bentonite） at the relative humidity of 50%， 60%， and 70%. The cigarette made by the reconstituted tobacco sheet had similar burning rate and fragrance to the original cigarette.

Research on Preparation of Positively Surface-charged Glass Fiber Filter Materials and Their Filtration Performance for Nanoplastics in Water

CHEN Yanlin,YANG Dong,XU Guilong,TANG Min,LIANG Yun — 2025/3/24 21:51:06

In this study， reactive quaternized polyethyleneimine （GPEI） was synthesized and applied for the enhanced modification of glass fiber filter paper， resulting in positively charged glass fiber filter materials that were used for filtering nanoplastics in water. Fourier-transform infrared spectroscopy was employed to analyze the chemical structure of GPEI. The effects of GPEI coating amount and quaternization reagent dosage on the physical properties of the modified glass fiber filter materials and its filtration performance for nanoplastics in water were studied， the filtration durability of the positively charged glass fiber filter materials was also studied. The results showed that when the molar ratio of KH560∶PEI∶GTMAC was 6∶1∶1 and the GPEI coating amount was 6.0%， the modified positively surface-charged glass fiber filter materials exhibited optimal overall performance with a tensile strength of 0.789 kN/m， surface Zeta potential of +55.7 mV， filtration efficiency of 97.3% for 300 nm polystyrene latex particles， and filtration resistance of only 6.2 kPa. After 30 days of immersion in water， the filtration efficiency remained at 95.2%， demonstrating excellent filtration durability.

Research Progress on Gas Filtration and Separation Materials Derived from Polyimide Fiber

2025/3/24 21:51:08

Polyimide fiber is a typical synthetic material， the molecular chain consists of alternating benzene rings and imide rings. Due to the low rotational energy， the molecular chain exhibits relative rigidity， endowing the material with high strength， high modulus， high temperature resistance， radiation resistance， chemical resistance， and excellent flame retardant. These properties make it has a good potential for application in the field of high-temperature gas filtration and separation. This paper reviewed the preparation technology of paper-based materials， membrane materials， and foam materials based on polyimide fibers， discussed the latest research progress of polyimide fiber-based gas filtration and separation materials， and looked forward to the future of the series of polyimide-based gas filtration and separation materials.

Preparation and Performance Research of Antistatic Air Filter Paper

2025/3/24 21:51:09

Bleached softwood pulp and conductive carbon black were used as the primary raw materials in this study， and cationic polyacrylamide （CPAM） was used as a retention aid to prepare antistatic air filter paper by wet forming. The effects of the dosage of CPAM and addtion amount of carbon black on retention rate of carbon black and the properties of the antistatic air filter paper were investigated. The results showed that when the addition amount of carbon black was 6% and the dosage of CPAM was 0.10%， the retention rate of carbon black in air filter paper reached 56%， and the bursting strength， average pore size， air permeability， and surface resistance of the air filter paper were 60.2 kPa， 40.3 μm， 188 L/m²·s， and 1.4×10⁴ Ω， respectively. The air filter paper displayed excellent strength and antistatic performance， as well as suitable pore size distribution and air permeability， and could meet the requirements of air purification for lithium battery production workshop.

Research and Application Status of Novel Cellulose Electrial Insulating Paper-based Materials

WANG Jing,SONG Shunxi,WANG Runan,ZHANG Meiyun — 2025/3/24 21:51:09

Rapid development of power grid construction and the continuous advancement of the “double carbon” plan have put forward higher requirements for the demand and performance of cellulose insulating paper. At present， insulating wood pulp for cellulose electrical insulating paper is mainly imported， at the same time， the performance of traditional cellulose electrical insulating paper cannot meet the needs of complex environments. In this context， the development of China’s characteristic new fiber materials and new reinforcement materials is of great significance for improving the performance of insulating paper， alleviating the shortage of fiber raw materials， and ensuring the stable operation of power equipments. This paper summarized the research status of novel cellulose electrical insulating paper in terms of new fiber raw materials and new reinforcement materials， so as to provide new insights for the development of high-performance cellulose electrical insulating paper in the future.

Study on the Microstructures and Thermophysical Properties of the Spacer Fibre Papers

MA Xiaoyong,CHEN Shuping,ZHANG Yajuan,YU Yang,YU Haifeng,WANG Bo — 2025/3/24 21:51:10

Fibre papers are appropriate for utilisation as multilayer insulation spacers due to their lightweight， thin， and low thermal conductivity properties. The microstructures and thermophysical properties of glass-fibre paper， plant-fibre paper， and chemical-fibre paper were investigated experimentally using scanning electron microscopy， mercury intrusion porosimetry， and transient plane source methods. The results showed that the glass fibres and chemical fibres exhibited smooth surfaces and rounded cross-sections， whereas the plant fibres displayed natural textures and flat cross-sections. Significant differences in fibre diameter were observed among the various types of fibre papers， with the glass-fibre paper possessing the smallest fibre diameters. Among of the three kinds of fibre papers， chemical-fibre paper exhibited the lowest porosity （83.62%）， plant-fibre paper demonstrateed the greatest total pore volume （7.174×10^-3 m³/kg）， and glass-fibre paper showed the largest total pore area （3 889 m²/kg）. In terms of thermophysical properties， glass-fibre paper exhibited the lowest horizontal and vertical thermal conductivities， as well as specific heat capacity. However， the thermal diffusivity of glass-fiber paper was significantly higher than that of plant-fibre paper and chemical-fibre paper.

Effect of Cigarette Paper Parameters on Cigarette Cone Height

2025/3/24 21:51:11

In order to explore the influence of cigarette paper parameters on combustion cone height， six cigarette paper parameters including quantitative and air permeability were selected according to the principle of uniform experimental design. Twelve cigarette samples with different parameter levels were rolled and subjected to one-way analysis of variance and regression analysis. The results showed that the cigarette cone heights corresponding to 12 different combinations of cigarette paper parameters ranged from 7.958 to10.455 mm， with relative standard deviation ranging from 2.5% to 11.7%. The comprehensive effect of four cigarette paper parameters， including breathability， sodium potassium ratio， magnesium carbonate addition， and combustion assisting dose， could explain 94.0% of the variation in cone height， which was the main factor affecting cigarette cone height. Quantification and acid radical type were secondary factors affecting cone height. When the main factor had a small impact on cone height， the cone height of cigarettes was lower， which was beneficial for reducing the tendency of combustion cone to fall off.

Investigation on the Influential Factors of Adhesion Phenomenon of Reconstituted Tobacco Sheets to Needles in the Pin-style Heated Tobacco Product

2025/3/24 21:51:12

In order to further investigate the influential factors and intrinsic mechanism of adhesion phenomenon of heated tobacco product（HTP） in depth， this study analyzed the effects of sheet type （drying process， slurry process， and rolling process）， sheet moisture content， and sheet filling density on the pulling force of the cigarettes. The results showed that the sheet type had the greatest impact on the pulling force of the cigarettes. The average pulling force of HTPs prepared with drying process， slurry process， and rolling process were 9.61， 1.73， and 1.98 N， respectively. HTPs prepared with sheets made by the rolling process were the most difficult to pull out， and the degree of adhesion phenomenon was positively correlated with their 2~10 nm mesoporous content of the sheets. The higher filling density or moisture content of the sheets in the cigarettes， the greater the pulling force and the more difficult it was to pull out. The secondary coke formation of tar produced from reconstituted tobacco sheets during the heating process was one of the primary cause of adhesion phenomenon. There existed a positive correlation between the severity of adhesion phenomenon and the sheet carbonization of heated.

Study on Oil Resistance of Different Kinds of Grinding Starch Used in Paper Food Packaging

2025/1/22 16:03:51

Ultrafine grinding starch dispersion was prepared by mechanical progress and coated on the surface of white cardboard for food packaging. Then the effect of starch type， size of grinding starch and coating amount on oil resistance of white cardboard was studied. The results showed that grinding cationic starch and grinding highly crosslinked starch M were more beneficial to improve the oil resistance of white cardboard. In addition， the smaller the grinding starch particles size and the higher the coating amount， the higher the oil resistance level of white cardboard. Using highly crosslinked starch M as raw material with size of 0.264 μm， and the coating amount of 3.5 g/m²， the air permeability of coated white paperboard was reduced by 98.0%， the oil resistance level reached to 6， the oil absorption value reached to 0.87g/m²， and the oil contact angle reached to 93.2°. When the coating amount increased from 2.23 g/m² to 6.20 g/m²， the oil resistance level of coated white paperboard increased from 2 to 9， and the air permeability decreased from 0.059 3 to 0.000 081 0 μm·Pa·s， the oil absorption decreased from 2.32 g/m² to 0.59 g/m².

Study on the Preparation, Structure, and Properties of Heterocyclic Aramid Ⅲ Fibrids

ZHOU Wanli,YANG Kuan,WANG Heng,HE Xinye — 2025/1/22 16:03:53

The heterocyclic aramid Ⅲ frbrid was prepared by injecting heterocyclic aramid Ⅲ polymerization solution into the solidfication bath with high speed stirring. The heterocyclic aramid Ⅲ raw papers were further prepared via wet papermaking process. The effects of heterocyclic monomer content and polymer relative molecular weight on the storage stability of the heterocyclic aramid Ⅲ polymerization solution， the structure and morphology of the heterocyclic aramid Ⅲ fibrids were studied. The effects on the mechanical properties of the heterocyclic aramid Ⅲ raw papers were discussed. The results showed that the stable heterocyclic aramid Ⅲ polymerization solution could be prepared only when the heterocyclic monomer content was higher than 30%， and the fibrids prepared with heterocyclic monomer content higher than 40% had a larger ratio of length to diameter， which was suitable for papermaking. The polymer relative molecular weight had a great influence on the appearance of the fibrids. The fibrids prepared by the heterocyclic aramid Ⅲ polymerization solution with apparent viscosity in 10 000~20 000 cP， and the specific concentration logarithmic viscosity of 2.4~5.5 dL/g， had a higher ratio of length to diameter and specific surface area， and the further prepared heterocyclic aramid Ⅲ raw papers had excellent mechanical properties.

Research on Thermal Conductivity of Cigarette Paper for Heated Tobacco Based on Transient Plane Source Method

2025/1/22 16:03:55

In order to investigate the thermal conductivity of cigarette paper for heated tobacco， transient plane source method was used to detect the thermal conductivity of cigarette paper， and lab methodology verification was carried out to verify and study the effects of conventional physical indexes， calendering treatment， calcium carbonate addition， fiber raw material types， anti-penetration treatment， and temperature on the thermal conductivity of cigarette paper. The results showed that the intraday and interday precision of transient plane source method for measuring the thermal conductivity coefficients of cigarette paper were both lower than 4%. The thermal conductivity coefficients of cigarette paper had a significant positive correlation with the tightness and a negative correlation with the air permeability. After calendering， the fiber contact in cigarette paper was closer and the gap was smaller， the thickness and air permeability of cigarette paper decreased， the tightness increased， and the thermal conductivity of cigarette paper was significantly enhanced. The larger amount of calcium carbonate in cigarette paper， the larger thickness and air permeability of cigarette papers and the smaller tightness， the stronger the thermal conductivity. The thermal conductivity coefficients were different for the cigarette paper prepared from different fiber raw materials such as hemp pulp and wood pulp. The thermal conductivity coefficients of cigarette paper after anti-permeation treatment （modified starch coating amount of 0~0.17%） had no obvious change. The thermal conductivity of cigarette paper increased with the increase of temperature in the range of 22~250 ℃.

Study on the Differences in Moisture Absorption-Desorption Behaviors Between Reconstituted Tobacco Sheets Prepared by Natural Tobacco Leaves via Papermaking Method

2025/1/22 16:03:56

Various models were used to fit the isothermal moisture absorption-desorption behaviors of natural tobacco leaves and reconstituted tobacco sheets under the conditions of cut tobacco processing production line with the help of the optimum isothermal moisture absorption model and desorption kinetics model. The findings showed that the DLP model exhibited the best fitting performance for the isothermal moisture absorption behaviors of natural tobacco leaves and reconstituted tobacco sheets， and the isothermal hygroscopic curves were of type Ⅲ and type Ⅱ respectively， indicating significant differences. The moisture absorption hysteresis in reconstituted tobacco sheets was not apparent， when the relative humidity in natural tobacco leaves was low， moisture absorption hysteresis was evident. Page model provided the best fitting for the desiccation process of natural tobacco leaves and reconstituted tobacco sheets. In the early drying stages， higher temperatures accelerated the moisture desorption rate of tobacco leaves. While in the late drying stages， increasing temperature led to a slower moisture desorption rate. Under the identical conditions， the water loss rate in reconstituted tobacco sheets exceeded that of natural tobacco leaves. It was verified that calculated values from the Page model and measured values had a relative error of moisture content within 5%， which could better predict the moisture desorption behaviors of natural tobacco leaves and reconstituted tobacco in actual production settings.

Lateral Flow Immunoassay Method Based on Surface Enhanced Raman Spectroscopy for Rapid Detection of Heavy Metal Elements in Cigarette Paper

2025/1/22 16:03:58

To achieve highly sensitive， quantifiable， and rapid detection of heavy metals in cigarette paper， a novel lateral flow immunoassay technique based on surface enhanced raman spectroscopy （SERS） signals was studied and proposed. SERS lateral flow immunoassay method utilized a raspberry-like SERS label Fe₃O₄@Raspberry-like Au magnetic nanoparticles （Fe@RAu） to capture metal residues in samples. Au shell on the Fe@RAu surface could generate Raman hot spot effects to enhance the Raman signals of DTNB molecules modified on its surface， while its Fe₃O₄ core could be attracted by external magnetic forces to concentrate targets in the sample. Based on these characteristics， SERS lateral flow immunoassay method demonstrated ultra-high detection sensitivity and quantification capability. The results showed that the SERS lateral flow immunoassay method achieved sensitivity levels of 1.424， 0.937， and 1.568 ng/kg for the simultaneous detection of three heavy metals， including cadmium （Cd²⁺）， chromium （Cr³⁺）， and lead （Pb²⁺） in cigarette paper ash. The spiked recovery rate for actual cigarette paper standard samples was>90%， the relative standard deviation （RSD）was<10%， and the entire detection process （including pretreatment） was<30 min.

Preparation and Performance Study of Bi₂O₃/La₂O₃/Aramid Pulp Fibers/Carbon Fiber Composite Flexible Lead-free X-ray Shielding Paper

WANG Wenbo,HUA Li,GUO Zizhan,JIA Fengfeng,YANG Pengbo,LU Zhaoqing — 2025/12/25 16:31:43

In this study， Bi₂O₃/ La₂O₃/aramid precipitated fiber/carbon fiber composite paper (BLCP) by utilizing aramid precipitated fiber (AF) and carbon fiber (CF) as reinforcement skeletons was prepared. This innovative composite incorporated dual high-atomic-number (Z) functional fillers, Bi₂O₃ and La₂O₃, and was produced through a combination of vacuum filtration and phenolic resin impregnation-curing processes. The results revealed a uniform dispersion of Bi₂O₃ and La₂O₃ throughout the AF/CF matrix. The internal porous structure of the composite extended the propagation paths of X-ray and increased the frequency of photon collisions, facilitating efficient scattering through both the photoelectric effect and Compton scattering. Moreover, the combination of Bi₂O₃ and La₂O₃ demonstrated a synergistic attenuation effect on X-ray, significantly enhancing the shielding performance. Specifically, the BLCP containing 0.5 g each of Bi₂O₃ and La₂O₃ fillers exhibited X-ray shielding efficiencies ranging from 69.3% to 85.8% within the 20~70 kV tube voltage range. This material was notable for its lightweight properties (with a thickness of 0.505 mm and a density of 0.37 g/cm³), flexibility (0.22 MJ/m³), and environmental friendliness.

Fabrication of Hydrophobic Cellulose Filter Paper for Oil-water Separation

LUO Gai,WENG Wenwei,WU Xiaobiao,LU Shengchang,CHEN Lihui,WU Hui — 2025/12/25 16:31:44

The hydrophobic cellulose filter paper modified with a dopamine-fluoropolymer copolymer P(DA-co-FA) were developed via a facile dip-coating strategy for efficient oil-water separation. The result showed that the low-surface-energy fluorinated groups had been introduced， and the modified filter paper exhibited a water contact angle of up to 140°， remarkable pH stability， and superior hydrophobicity. Under gravity-driven separation， the modified filter paper achieved over 96% separation efficiency for n-hexane/water mixtures and maintained 93% efficiency after 20 cycles. This work presented a scalable approach to fabricate cellulose-based hydrophobic materials， demonstrating significant potential for applications in oil spill remediation， self-cleaning surfaces， and sustainable separation technologies.

Research Progress on the Preparation and Applications of Biomimetic Superhydrophobic Paper-based Materials

FAN Jiaming,LIU Kefeng,YANG Guihua,DONG Qixiu,CHEN Jiachuan — 2025/12/25 16:31:45

This review expounded on the fundamental concept of superhydrophobic， wetting theories， and performance evaluation systems. Based on the biomimetic concept of "surface rough structure construction and low surface energy modification"， the preparation of superhydrophobic paper-based materials and their applications in oil-water separation， printing and packaging， agriculture， medicine and biosensing， were systematically reviewed. Additionally， in response to key challenges including large-scale preparation， long-term stability， and multi-functional integration， it provided an outlook on the future development directions of these materials.

Preparation and Performance of the Carbonized and Non-combustible Coated Paper Containing Kaolin at High Temperature

WANG Zhiliang,ZHAO Xin,DU Yezhuang,LIANG Dequan,XU Miaojun,PAN Gaofeng — 2025/12/25 16:31:46

In this study， the soluble starch and sodium carboxymethyl cellulose with the mass ratio of 96∶4 was used as adhesives， and the kaolin was acted as pigments. The coating materials were prepared and then used for surface coating of paper. When the mass fraction of kaolin and adhesive was 83∶17， the solid content of coating was 35%， and the coating weight was 7.5 g/m²， the coated paper was rapidly carbonized after the heating device with 550 ℃ passed through the paper. The carbonization ring was not spreading， and the average diameter was 5.8 mm. At the same condition， the uncoated paper occurred smoldering， and the charring ring spread rapidly with the average pore diameter >65.0 mm. Thermal gravimetric-infrared analysis showed that the gaseous products were effectively suppressed during pyrolysis. The transition of oxygen and heat were effectively inhibited due to the spread of silicate flakes on paper surface during coating. Consequently， the paper was endowed excellent carbonization and non-diffusion performance at high temperature.

Study on the Cellulose Acetate Paper Enhancement Technology for Cigarette Filter

WANG Jian,CHAO Lumen,LIU Wen,YANG Yang,SUN Qingjie,TANG Wei,LI Chaojian — 2025/12/25 16:31:47

This study utilised diacetate fibre bundles as the primary raw material, blended with plant fibres to produce cellulose acetate paper (CAP) for tobacco filter filling. Evaluating CAP’s tensile strength, air permeability, and flexibility as key indicators, Continuous papermaking trials were conducted on a 200 mm test paper machine, with further processing into fine composite filter. Results indicated the optimal process conditions: average fibre bundle length of 2.5~3.5 mm, softwood pulp as the blending pulp type at 30% proportion, refining degree of 55~70 °SR, and addition of 2% ZM24-2 nanocellulose. This configuration increased CAP tensile strength by 278%. Cigarette filtration tests showed that the tar content was reduced by 9.4% compared to pure acetate filter, whilst air permeability and softness met requirements for filter formation on the filter moulding machine.

Research Progress and Application Prospects of Domestic Glass Fiber Filter Paper

ZHANG Pingyun,DING Shuang,ZHANG Zhiming,WANG Yaqun — 2025/11/25 12:54:38

This paper reviewed the localization of glass fiber filter paper， covering the development level of its production process and the current situation of enterprises. Meanwhile， the current situation of air purification in nuclear industry downstream of glass fiber filter paper and the application field of liquid filtration in nuclear power plant were analyzed. Finally， based on the problems existing in the practical application of nuclear grade air purifier and water filter element in nuclear power plant with glass fiber filter paper as medium， combined with the lightweight requirements of nuclear power plant equipment and the principle of radioactive waste minimization management， the future development trend of glass fiber filter paper was prospected.

Research Progress on Cigarette Inner Liner Paper of Green and Low-carbon

2025/11/25 12:54:39

Currently， tobacco enterprises are strengthening the application demonstration of low-carbon， zero-carbon， negative carbon， strengthening the supporting and leading role of scientific and technological innovation in the green and low-carbon transformation of the industry， and focusing on low/non-aluminum， low-carbon and degradability. This paper introduced the technical characteristics and green low-carbon benefits of mainstream tobacco lining paper， and focused on the technical breakthrough and industrialization potential of aluminum-free lining paper， as well as its obvious advantages in barrier performance， environmental protection performance and energy consumption.

Optimization of Performance and Development Trends of Paper-based Packaging Materials for Food Contact Safety

YAN Bingxing,ZHU Ling,YANG Dong,FU Yanli — 2025/11/25 12:54:40

Compared with traditional plastic packaging materials， paper-based packaging materials have gradually attracted widespread attention in various industries in terms of environmental protection and recyclability， especially in the field of food packaging. However， food contact paper-based packaging materials also have certain safety risks in the process of paper source， process adjustment， storage and transportation， and there are potential threats to the food in the package. On the basis of clarifying the risks of paper-based packaging materials， this paper analyzed the specific problems existing in paper-based packaging materials， and tried to improve the barrier， antibacterial and intelligent properties of paper-based packaging materials through material innovation. At the same time， the paper also made a new outlook for its future development.

Study on the Construction and Application Performance of Electromagnetic Function Papers Simulation Model Based on Carbon Fiber Parameters

XIE Zhixian,XIA Chenbin,HUANG Zhengsheng,CHEN Wei,WANG Yi,LONG Jin,HU Jian — 2026/6/23 16:24:01

In order to achieve rapid structural prediction and flexible performance control of electromagnetic functional papers， using poly-m-phenylene isophthalamide as the matrix， this study prepared electromagnetics function papers by adding conductive carbon fibers in the wet papermaking process. By simulating the internal conductive fiber network structure and using commercial finite element analysis software (HFSS) to construct an electromagnetic simulation model, high-precision simulation calculations of electromagnetic parameters were carried out at an electromagnetic wave frequency of 10 GHz. Combined with measured data, the influence of carbon fiber addition amount and length on the dielectric properties and electromagnetic shielding properties of the papers was systematically analyzed, and the application performance of the simulation model was evaluated. The results showed that the simulation data of the relative dielectric constant of electromagnetics function papers were in good agreement with the measured results in terms of numerical magnitude and variation trend. The simulation error rates of the model under different carbon fiber addition amounts (0.5%~2.5%) and lengths (2~9 mm) were lower than 18.5% and 34.4%, respectively. Under the condition of a carbon fiber length of 3 mm, as the carbon fiber addition amount increased from 0.5% to 2.5%, the relative dielectric constant and electromagnetic shielding effectiveness of electromagnetics function papers showed an overall increasing trend. Under the addition amount of 1.0% carbon fiber, as the carbon fiber length increased from 2 mm to 6 mm, the electromagnetic shielding effectiveness of electromagnetics function papers showed an upward trend. And the reflection coefficient and absorption coefficient increased simultaneously， while the transmission coefficient continued to decrease. When the carbon fiber length was 6 mm， the electromagnetic shielding effectiveness reached a maximum value of 4.49 dB.

Study on the Effects of Carbon Fiber Preforms with Different Fiber Forming Structures on Properties of Wet Friction Materials

GENG Hebin,XIANG Hongjia,LU Anan,YAO Mengmeng,HE Jiayao,ZHANG Chunhui — 2026/6/23 16:24:02

To optimize the structural design and regulate tribological properties of carbon fiber friction materials， three types of polyacrylonitrile (PAN)-based carbon fiber preforms including raw carbon paper， carbon felt， and carbon cloth were impregnated with phenolic resin solution. Carbon fiber friction materials were subsequently manufactured via hot pressing and curing. The influences of different preform structures on surface micromorphology， pore structure， hardness， shear strength， compression resilience， friction， and wear performance of the materials were investigated. The results revealed that compared with carbon cloth-based samples， the carbon fiber friction materials prepared from raw carbon paper and carbon felt showed porosity increased by 386.2% and 338.3%， hardness declined by 34.0% and 30.1%， compressibility increased by 60.0% and 24.1%， resilience rate declined by 5.6% and 4.6%， and permanent deformation rate increased by 151.7% and 101.7%， respectively， both accompanied by a remarkable reduction in shear strength. After friction and wear tests， raw carbon paper and carbon felt-based fiber friction materials achieved superior friction performance. Their midpoint friction coefficients were 0.116~0.141 and 0.105~0.131， end-to-midpoint friction coefficient ratios were 0.952~1.081 and 1.082~1.173， and wear rates were 2.16×10^-6 and 1.46×10^-6 cm³/J， correspondingly. By contrast， carbon cloth-based fiber friction material possessed a midpoint friction coefficient of 0.094~0.118， an end-to-midpoint friction coefficient ratio of 0.987~1.115， and a wear rate of 1.18×10^-6 cm³/J， which exhibited outstanding bonding stability and long-term wear resistance.

Research Progress on Carbon Paper-based Membrane Electrodes for Proton Exchange Membrane Fuel Cells

XIAO Xinyi,GUO Dingwen,JIANG Yunhong,GUO Daliang — 2026/6/23 16:24:03

Currently， membrane electrode materials of proton exchange membrane fuel cell faced challenges such as imbalanced water and gas regulation， high platinum catalyst costs， and poor durability. This paper systematically reviewed research progress on key materials for carbon paper-based membrane electrodes in proton exchange membrane fuel cells， focusing on material modification techniques for the carbon paper layer， microporous layer， catalyst layer， and proton exchange membrane. With the aim of providing a reference for the commercialization of carbon paper-based hydrogen fuel cell technology.

Study on the Filtration Stability of Surface-modified Glass Fiber Filter Paper in High-temperature Hydraulic Systems

SHEN Zheyu,TANG Min,LIANG Yun,XU Guilong,SONG Qiang — 2026/6/23 16:24:03

In this study, glass fibers were surface-modified with γ-aminopropyltriethoxysilane (KH550) and γ-glycidoxypropyltrimethoxysilane (KH560), and acrylic resin-reinforced glass fiber filter papers were prepared. The basic properties, pore structure, and filtration performance of different filter papers before and after high-temperature aging were comparatively analyzed to investigate the effect of silane coupling agent modification on the filtration stability of the filter papers. The results showed that after high-temperature aging, the overall fiber network structures of the three filter papers remained intact, with only slight changes in thickness and air permeability. Compared with the blank sample and the KH550-modified filter paper, the KH560-modified filter paper exhibited the highest tensile strength after high-temperature aging (1.49 kN/m), as well as smaller mean and maximum pore sizes. In terms of filtration performance, the average filtration ratio retention of the KH560-modified filter paper after high-temperature aging exceeded 89%, which was higher than that of the blank sample (over 74%). Moreover, it showed the lowest attenuation of filtration ratio with increasing pressure differential. Meanwhile, the KH560-modified filter paper took a longer time to reach the same terminal differential pressure， indicating a longer service life.

Research Progress on the Application of Cellulose-based Materials in Electronic Devices

QIU Haiyan,HUANG Haiqing,CHI Yunyang — 2026/6/23 16:24:04

Cellulose based materials have the characteristics of flexibility， economy， and environmental decomposability， and their internal porous structure can replace traditional materials as a new generation of environmentally friendly electronic substrates. In this paper， the intrinsic properties of cellulose-based materials such as porous network structure， mechanical flexibility， and surface hydroxyl reactivity were systematically discussed， and several functional modification methods such as surface coating and printing， internal impregnation and filling， plasma and vapor deposition， composite reinforcement， and so on were sorted out. On this basis， the electrical performance， mechanical stability， and interface bonding optimization strategy of the device were analyzed， and compared with the common flexible substrate. In addition， the typical application examples of cellulose based sensors， energy storage and collection devices， wearable and disposable electronic products were also introduced. Finally， the problems existing in the environmental stability， surface roughness， and system integration of materials were described， and the future development of intelligent response paper， AIoT integration， and full life cycle standards were prospected.

Preparation and Properties of a Novel Paper-based Desiccant Material

LU Zhifeng,XU Guilong,TANG Min,SONG Qiang,LIANG Yun — 2026/5/25 18:27:40

This study presented a novel paper-based desiccant material fabricated through a wet-forming process. A porous fibrous substrate was first prepared from bamboo pulp, glass fibers, and dual-melting-point polyethylene terephthalate (PET) fibers, and then impregnated with sodium polyacrylate (PAAS) resin. The effects of fiber composition, hot-pressing time, and PAAS retention on the material’s structure and properties were systematically investigated. Results showed that the optimal performance was achieved with a mass ratio of 4∶3∶3 for the dual-melting-point PET fibers, bamboo pulp, and chopped glass fibers, respectively, after hot-pressing at 92 ℃ for 8 min and with a resin retention of 140%, exhibited optimal overall performance. Its tensile index was 29.5 N·m/g, stiffness 1.22 mN·m, and burst strength 149 kPa. Under conditions of 30 ℃ and 90% relative humidity (RH), the equilibrium moisture absorption rate reached 76%. After moisture absorption, the tensile index, stiffness, and burst strength were maintained at 7.44 N·m/g, 0.70 mN·m, and 149 kPa, respectively, along with demonstrating good low-temperature moisture release characteristics. Remarkably, its moisture absorption capacity remained virtually unchanged over 50 absorption-desorption cycles, indicating exceptional cycling stability.

Preparation and Performance of MFC-reinforced Paper-based Lithium-ion Battery Separators

LIU Tianyu,LIU Ying,CHAO Lumen,LIU Wen — 2026/5/25 18:27:40

This study analyzed the effects of MFC on the pore structure of paper-based separators by incorporating MFC. The mechanical properties， thermal dimensional stability， porosity， air permeability， pore size， and pore size distribution of the prepared paper-based separators were analyzed and compared with the commercial Celgard2325 separator. This demonstrated the potential of MFC-reinforced paper-based separators for use in lithium-ion battery separators. The results indicated that the MFC-10 paper-based separator， prepared with 10% MFC content， exhibits stable performance. Its average pore size was 2.124 µm， with a maximum pore size of 3.276 µm. The porosity reached 69%， significantly higher than Celgard2325’s 39%. Electrolyte absorption rate was 263%， with an electrolyte impregnation height of 35.6 mm， indicating superior electrolyte wetting performance compared to Celgard2325. Battery samples using the MFC-10 paper-based separator demonstrated superior rate performance compared to Celgard2325 at discharge rates of 0.2， 0.5， and 1 C.

Study on the Preparation of Polyamide Polyamine/Titanium Dioxide-loaded Activated Carbon Paper and Its Formaldehyde Removal Performance

LI Huanhuan,ZHAO Lianjie,ZHANG Yue,MENG Fanjin,MAO Cui,CAO Qingfu — 2026/5/25 18:27:42

In this study， amino-terminated polyamide polyamine (PPC) was prepared via polycondensation reaction. After coordination reaction with titanium dioxide (TiO₂)， activated carbon paper was treated by impregnation method to successfully prepare PPC/TiO₂-loaded activated carbon paper， and its formaldehyde removal performance was systematically investigated. The results showed that pure TiO₂ particles were prone to agglomeration， with particle sizes concentrated around 5 058 nm. After composite modification with PPC， the particle size of TiO₂ particles was significantly reduced to about 27 nm， and the agglomeration problem was effectively alleviated. The loaded activated carbon paper could achieve efficient formaldehyde removal through the synergistic effect of physical adsorption， chemical adsorption and photocatalytic degradation. Under the irradiation of a 300 W ballast high-pressure mercury lamp， it exhibited rapid， efficient and recyclable formaldehyde purification performance： when the loading amount of PPC/TiO₂ was 20 g/m²， the formaldehyde removal rate of the loaded activated carbon paper reached 40% within 30 min， and the saturated removal rate was as high as 95.7%. In addition， it had excellent cyclic regeneration performance， and the saturated formaldehyde removal rate could still be maintained at 90.8% after 5 photocatalytic cycles. Furthermore， compared with pure activated carbon paper， the air permeability of the loaded activated carbon paper remained basically unchanged， and the tensile index was increased by 17%， which had both good air permeability and high mechanical strength， showing potential for practical application.

Fabrication and Performance Study of Micro/Nano Carbon Particle Coatings on Paper-based Friction Composites

2026/5/25 18:27:43

Micro/nano-sized carbon particles are prone to agglomeration， making it difficult to construct uniform and wear-resistant coatings on paper-based friction materials. To address this issue， graphene nanoplatelets (GNP)， vapor-grown carbon fibers (VGCF)， and carbon fiber powders (CF) were separately sprayed onto friction base paper using an air-spraying technique. Subsequently， paper-based friction composites were fabricated through resin impregnation， hot pressing， and curing processes. Their microstructure， shear strength， thermal diffusivity， and frictional performance were systematically investigated. The results indicated that when the carbon particle content was 2%， the dispersibility， stability， and fluidity of the GNP， VGCF， and CF dispersions were all optimal. Compared with the pristine friction base paper without carbon particles， the paper-based composites coated with GNP exhibited increases of 16.3% and 8.2% in in-plane and normal thermal diffusivity， respectively， along with a 50% reduction in wear rate. For VGCF-coated composites， the shear strength increased by 129.1%， while the oil absorption time increased significantly. For CF-coated composites， the dynamic friction coefficient under a braking pressure of 3.01 MPa increased by 6.3%， and the coefficient of variation decreased by 33.6%~52.0%. In addition， the ratio of average dynamic to static friction coefficients approached to 1， indicating simultaneous improvements in transmission efficiency and operational stability.

Research Progress on the Paper-based Hydrophobic Modifier Application

RUAN Xinru,XIA Ji,HE Rundong,CHEN Chunni,CAO Haohang,WANG Haiping — 2026/5/25 18:27:44

This paper systematically reviewed recent advances in modifying paper-based materials using various hydrophobic agents， focusing on the application of typical agents such as fluorides， silanes， stearic acid， waxes， and lignin in constructing superhydrophobic paper-based materials. The mechanisms of various hydrophobic agents in reducing surface energy and constructing micro-nano rough structures were explored， and their advantages and disadvantages in terms of environmental friendliness and cost were compared. By comparison， the bio-based materials like lignin hold greater potential for developing high-performance， environmentally friendly， green， and sustainable superhydrophobic paper-based materials， indicating promising future prospects.

Preparation of Ultrafine Fiber Composite Filter Paper and Study on Its Oil-Gas Separation Performance

LIU Bing,WANG Di,LIANG Yun,TANG Min — 2026/5/25 18:27:45

In this study， four types of ultrafine fiber composite filter papers were prepared via wet-forming technology using glass fibers， polyethylene terephthalate (PET) fibers， fibrillated tencel fibers， and fibrillated aramid fibers as main raw materials. Their oil-gas separation performances under room-temperature and high-temperature conditions were systematically evaluated. The results showed that as the operating condition changed from room temperature to high temperature， the most penetrating particle size (MPPS) of four types of ultrafine fiber composite filter papers increased from 0.20 μm to 0.30~0.40 μm， their steady-state pressure drop decreased by 600~1 100 Pa， and the filtration efficiency for droplets with particle size of 0.2~10 μm decreased by 0.2~7 percentage points. In addition， under high-temperature conditions， the introduction of fibrillated fibers could improve the steady-state pressure drop and quality factor of ultrafine fiber composite filter papers. Among them， the ultrafine fiber composite filter paper prepared by blending with fibrillated aramid fibers exhibited a superior steady-state pressure drop (4 450 Pa) compared with the commercial filter paper (4 700 Pa)， and its quality factor (0.480 kPa^-1) was 1.2 times that of the commercial filter paper， demonstrating promising application potential in high-temperature environments.

Preparation of Polyaniline/Cellulose-based Conductive Materials via Metal Ion Doping-impregnation Polymerization Method

ZENG Penglin,YANG Yang,BIAN Yongfeng,CHAO Lumen,PENG Xinwen — 2026/5/25 18:27:46

In this study， using bamboo pulp cellulose as a flexible scaffold and aniline and ammonium persulfate as raw materials for polymerization， the chelating effect of cellulose on metal ions (Fe³⁺， Cu²⁺， Co²⁺， Mn²⁺， Zn²⁺) was utilized to promote the uniform polymerization of aniline within the fiber network. A stepwise loading strategy was adopted， based on in-situ polymerization involving secondary impregnation polymerization of aniline monomers， to precisely control the deposition morphology and conductive network. The PANI/cellulose-based conductive material was characterized in terms of conductivity， mechanical properties， and electrochemical performance. The results showed that the PANI/cellulose-based conductive material exhibited a significant increase in conductivity from 0.12 S/cm of reference bamboo paper to 1.55 S/cm， a tensile index of 8.70 N·m/g， and a high areal specific capacitance of 5 639 mF/cm² at a current density of 1 mA/cm². The material combined high conductivity， good mechanical properties， and excellent electrochemical performance， making it suitable for application in flexible supercapacitor electrodes.

Research Progress on Environmentally Friendly Cooling and Low-retention Filter Rods

HAO Xiaoli,YANG Jing,WANG Xu,WANG Gang,XU Gangqiang,SHA Yunfei,CAI Zhenbo — 2026/5/25 18:27:47

Paper-based filter materials， owing to their biodegradability， readily available raw materials， and cost advantages， emerged as a potential alternative for filter rods in both conventional cigarettes and heated tobacco products. This paper systematically reviewed the evolution of filter rods from traditional functions toward “cooling and low-retention” capabilities， with a focus on the application of paper-based composite filter materials and other environmentally friendly materials in heated tobacco products. It summarized， from three aspects—organic polymer materials， composite materials， and structural cooling techniques—the mechanisms and effectiveness of achieving aerosol cooling and appropriate filtration through material structure design and the addition of functional additives. Finally， this paper analyzed the current challenges in terms of performance balance， industrialization bottlenecks， and the lack of evaluation systems， and looked forward to future directions including material innovation， structural optimization， system integration， and the establishment of standards， aiming to provide a reference for the green transition of the novel tobacco industry.

Research Progress on Cellulose-based Adsorption Materials for Volatile Organic Compounds

LI Yueqing,NIE Jingyi,YANG Bin,ZHANG Meiyun,YANG Ruiting,YANG Chengyu,RUAN Ziwei — 2026/3/24 15:06:00

This paper systematically reviewed the recent progress of cellulose-based materials in volatile organic compounds (VOCs) adsorption. This review firstly analyzed the structural characteristics of natural cellulose and nanocellulose and their adsorption performance. Then it discussed the construction strategies， adsorption mechanisms， and performance of cellulose derivatives and cellulose-based composite materials. It also summarized the research status of porous structure design and surface functionalization regulation of cellulose-based materials. Finally， the future research directions were prospected， aiming at the current challenges faced by cellulose-based materials in terms of morphological diversity， large-scale preparation， and high-efficiency adsorption of complex VOCs.

Pulse-jet Cleaning Performance of Filter Medias with Different Forming Methods for Fine Particulate Dust

LI Mengyao,TANG Min,PENG Ningjian,SONG Qiang,LIANG Yun — 2026/3/24 15:06:00

The pulse-jet cleaning performance of engine air filters is a critical factor affecting their service life. Current test standards primarily employ ISO 12103-1 A2 test dust, which inadequately reflects material performance in environments with high fine dust content, such as desert or mining areas. To address this, this study selected three types of fibrous filter medias with different forming methods (wet-laid filter media, melt-blown nonwoven composite media, and electrospun composite media). Their dust-holding capacity and pulse-jet cleaning performance were compared under different dust concentrations and face velocities, using two dust types with distinct particle size distributions: 0~3 μm Arizona Test Dust (0-3 ATD dust, 0.1~2 μm) and A2 dust (1~10 μm). The results showed that reducing the face velocity or dust concentration improved the pulse-jet cleaning performance of the filter medias, and the face velocity had a more significant impact. At a dust concentration of 1.0 g/m³, when the face velocity was reduced from 11.1 cm/s to 6.7 cm/s, the total 10 pulse-jet cleaning cycles duration of the electrospun composite media for fine 0-3 ATD dust increased from 518 s to 2 422 s. This was approximately 1.9 and 2.8 times that of the wet-laid media and melt-blown composite media, respectively, while the dust stripping rate consistently remained above 85%. Under the conditions of a dust concentration of 1.0 g/m³ and a face velocity of 11.1 cm/s, the average dust stripping rate of the three filter medias for A2 dust during the 10 cycles was similar (77%~78%). However, due to the tendency of fine particles to embed deeper into the fiber matrix, which making them harder to dislodge, the cleaning duration for 0-3 ATD dust decreased by 66%~80%. Notably, the electrospun composite media exhibited an average dislodgement efficiency of approximately 68% for 0-3 ATD dust, significantly higher than that of the wet-laid media (38%) and melt-blown nonwoven composite media (15%), demonstrating its adaptability for pulse-jet cleaning of fine dust particles.

Study on Fabrication and Property Regulating of Polyphenylene Sulfide/Aramid/Glass Fiber Composite Paper

2026/3/24 15:06:02

With polyphenylene sulfide (PPS) fiber as the insulating reinforcing phase， para-aramid precipitated fiber as the auxiliary phase， and glass fiber as the skeleton material， PPS/aramid/glass fiber composite paper was prepared via a wet-forming process. The effects of PPS fiber content on the microstructure， physical properties， electrical insulation properties， and thermal stability of the PPS/aramid/glass fiber composite paper were systematically investigated. The results showed that the PPS/aramid/glass fiber composite paper exhibited optimum comprehensive properties at a basis weight of 105 g/m² with PPS fiber content of 20%， achieving a tear strength of 1 733.8 mN， a tensile strength of 25.4 kN/m， and volume resistivity reached 8.816×10¹⁴ Ω·m， power frequency breakdown strength reached 16.09 kV/mm， dielectric loss reached 1.85×10^-13， and thermal shrinkage rate was 4.8%. The PPS/aramid/glass fiber composite paper held application potential as a high-performance insulating paper.

Study on Air Filtration Performance of Microfibrillated Cellulose/Glass Fiber Aerogels

ZHANG Ziyan,KANG Jiancong,LI Xiaoyun — 2026/3/24 15:06:02

To address the high airflow resistance commonly associated with achieving high filtration efficiency in conventional air filtration materials， this study employed glass fibers (GF) as the matrix and introduced microfibrillated cellulose (MFC) to construct MFC/GF aerogels with a three-dimensional network structure. The composite was further modified via silanization using methyltrimethoxysilane (MTMS) and subsequently fabricated into microfibrillated cellulose/glass fiber aerogel filter materials (GMM) through a freeze-drying process. By regulating the MFC content and MTMS modification concentration， the prepared GMM were characterized in terms of their microstructure， filtration performance， mechanical properties， and hydrophobicity. The results showed that adding 0.1% MFC increased the filtration efficiency from 99.64% to 99.91% compared with GF. After MTMS modification， the pressure drop of the GMM decreased significantly while maintaining high filtration efficiency (>99.50%)， reaching as low as 145.58 Pa with a quality factor of 0.039 Pa^-1. The GMM also exhibited a well-developed continuous porous structure (average pore size of 4.07 μm and air permeability of 79 mm·s^-1). Moreover， MTMS markedly enhanced the mechanical strength （the compressive modulus reached 134.02 kPa， 15 times that of MFC/GF aerogel) and hydrophobicity (water contact angle of 131.7°).

Preparation and Performance Study of Flexible Polysulfonamide Heat-insulating Porous Films

ZHANG Sufeng,GAO Zhiwen — 2026/3/24 15:06:03

To develop a new type of insulating layer material for thermal protection in firefighting clothing, this study first dissolved polyphenylsulfone (PSA) fibers in N, N-dimethylacetamide, then used a water/ethanol mixture as a nonsolvent to prepare lightweight, soft, highly flame-retardant, and thermally insulating flexible PSA porous films via the nonsolvent-induced phase separation (NIPS) technique. The pore structure and thermal insulation properties of the films were precisely controlled by varying the phase separation conditions. The results showed that when the ethanol proportion in the nonsolvent was 80%, the PSA film had the lowest porosity (67.5%) and the smallest average pore size (100.0 nm), with a tensile strength of 13.4 MPa, a thermal conductivity as low as 0.025 W/(m·K), and exhibited excellent flexibility and thermal stability, providing effective thermal protection under high-temperature heating conditions.

Effect of Polyacrylonitrile Pulp on the Performance of Activated Carbon Filters

ZENG Zixuan,JI Yuanhuo,WANG Xiwen — 2026/3/24 15:06:03

This paper used papermaking technology to prepare activated carbon filter cartridges with sterilization function using activated carbon fibers (particles)， polyacrylonitrile pulp， and TiO₂particles as raw materials， and conducted performance tests on the filter cartridges. The results showed that the activated carbon filter cartridge produced had high water purification efficiency， good compressive strength， and also had sterilization function. As the amount of pulp increased， the porosity， average pore size， and maximum pore size of the filter element decreased， with a more concentrated pore size distribution. The iodine adsorption value， methylene blue adsorption value， and residual chlorine adsorption value declined accordingly. When the pulp addition reached 30%， the porosity was 91.6%， while the iodine adsorption value， methylene blue adsorption value， and residual chlorine adsorption value were 86.75%， 91.97%， and 92.48%， respectively. The sterilization rate of the filter element remained above 90% under UV lamp irradiation conditions. By testing the effluent quality of the filter element， the test results met the requirements of the national standard GB 5749—2022.

Influence of Filter Rod Substrate Properties on the Adhesive Performance of Centerline Adhesive

2026/3/24 15:06:04

This study investigated the influence of filter rod substrate properties on the bonding performance of centerline adhesives. Three types of plug wrapping papers， standard， high-porosity， and barrier， were combined with four adhesive formulations (CLC-YN-102， CLC-YN-102G， CLC-YN-102GQ， and H.B Fuller) and three application patterns (“Single-line”， “S”， and “Dot”) to systematically analyze their interactive effects. The results showed that the “Single-line” pattern yields the highest bonding strength due to its continuous and uniform adhesive distribution， achieving a peel force approximately 30% higher than the “Dot” pattern. The bonding strength increased with paper porosity； high-porosity paper， with a loose fiber structure and high surface free energy (75.4 mJ/m²)， enhanced adhesive penetration and interfacial bonding， exhibiting a 20% improvement over barrier paper. In contrast， barrier paper showed poor wettability (water contact angle of 120.3°) and the lowest adhesion. Among the adhesives， H.B Fuller demonstrates superior performance， combining low shear viscosity with moderate surface free energy (62.79 mJ/m²)， resulting in excellent bonding stability and higher peeling force.

Fabrication and Application of Paper-based Electrode Materials for Energy Storage

SUN Siyu,WAN Ying,FAN Ruiting,LIU Wen — 2026/1/23 16:32:25

This review comprehensively summarized recent progress in the development of paper-based electrodes， covering preparation methods， performance characteristics， and applications in supercapacitors and batteries. Emphasis was placed on the mechanisms behind the enhanced electrochemical performance achieved through functional modification of cellulose paper (such as regenerated fiber treatment， polypyrrole compositing) ，and the incorporation of nanomaterials (such as carbon nanotubes and graphene). The application potential of paper-based electrodes in flexible electronics， smart packaging， healthcare， and related fields was also discussed， along with current challenges and future research directions

Advances in Techniques to Improve the Ionic Conductivity of Polymer Electrolytes

HAN Liu,CHEN Yehong,WU Chaojun — 2026/1/23 16:32:27

Due to the excellent mechanical strength， processability， and safety，polymer electrolytes have been widely used in solid-state batteries， supercapacitors， sensors， and other fields. However， generally low ionic conductivity limits their application in high-energy-density energy storage devices. This paper summarized the main factors affecting ionic conductivity of polymer electrolytes—including interfacial effects， degree of ionization， polymer molecular weight，as well as various strategies to enhance the ionic conductivity of polymer electrolytes. It provided an in-depth comparative analysis of the impacts of material design， interfacial engineering， and the incorporation of functional fillers on the ionic conductivity of polymer electrolytes， furtuer discussed potential strategies for further improvements.

Preparation and Properties of Highly Conductive Ternary Copolymer P(VDF-TrFE-CFE) Separators

HAN Xiangju,GU Yongjun — 2026/1/23 16:32:27

This study investigated the ternary copolymer poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) (P(VDF-TrFE-CFE)) as a matrix material for advanced lithium-ion battery separators. Novel separators were fabricated using non-solvent-induced phase separation (NIPS)， thermally induced phase separation (TIPS)， salt leaching (SL)， and electrospinning (ES). A systematic investigation was carried out to elucidate the influence of these processing routes on the separator microstructure， pore architecture， electrochemical properties， and battery cycling performance. The results showed that the preparation method was a key factor governing the membrane microstructure and mechanical behavior. In particular， salt leaching and TIPS enabled effective tuning of separator porosity within the range of 23%~66%. All P(VDF-TrFE-CFE) separators exhibited relatively high ionic conductivity： the ES separators achieved a conductivity of up to 1.8 mS/cm， while the TIPS-derived separators showed a value of approximately 0.20 mS/cm. The lithium-ion transference numbers of all samples exceed 0.20， with maximum values of 0.55 obtained for the salt-leached and TIPS separators， indicating favorable ion-transport selectivity. Rate-capability tests revealed that batteries assembled with these separators deliver stable discharge capacities and excellent reversibility. Notably， the separators prepared by SL maintained a discharge capacity of around 41.9 mAh/g after 10 cycles at a 2 C rate.