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| Preparation and Performance Study of High-performance Barrier Paper Based on Dialdehyde Starch/Silanized CNF Bilayer Coatings |
| Received:September 28, 2025 Revised:October 18, 2025 |
| DOI：10.11980/j.issn.0254-508X.2026.04.003 |
| Key Words:cellulose nanofibers starch barrier properties coating paper |
| Fund Project:广东省级科技计划项目（2022B1111080004）。 |
| Author Name | Affiliation | Postcode | | WEN Hui* | 1Guangdong Guanhao High-Tech Co., Ltd., Zhanjiang, Guangdong Province, 524072
2Guangdong Guanhao New Material R&D Co., Ltd., Guangzhou, Guangdong Province, 511400 | 511400 | | KUI Minghong | 1Guangdong Guanhao High-Tech Co., Ltd., Zhanjiang, Guangdong Province, 524072
2Guangdong Guanhao New Material R&D Co., Ltd., Guangzhou, Guangdong Province, 511400 | 511400 | | MA Hongsheng | 2Guangdong Guanhao New Material R&D Co., Ltd., Guangzhou, Guangdong Province, 511400
3Zhuhai Hongta Renheng Packaging Co., Ltd., Zhuhai, Guangdong Province, 519000 | 519000 | | WANG Bin | 4School of Light Industry and Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 |
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| Abstract:In this study， dialdehyde starch (DAS) and silanized cellulose nanofibrils (H-CNF) were synthesized from cassava starch (CS) and bleached softwood pulp via sodium periodate oxidation and silane modification， respectively. A superhydrophobic DAS/H-CNF dual-coated high-performance barrier paper was subsequently fabricated by sequentially coating DAS and spraying H-CNF onto the base paper. This design synergistically integrated the dense film formed by the excellent film-forming properties of DAS with the low surface energy derived from the micro/nano structure of H-CNF. The results demonstrated that at a DAS coating weight of 4 g/m2 and an H-CNF coating weight of 0.4 g/m2， the DAS/H-CNF coated paper exhibited outstanding water and oil repellency， as well as excellent moisture and air barrier performances. Specifically， the water contact angle reached up to 150.1°， and the oil repellency achieved the maximum kit rating of 12. The Cobb60 value and water vapor transmission rate (WVTR) were reduced to 3.12 g/m2 and 49.35 g/(m2·d)， representing significant decreases of 87.7% and 88.0% respectively compared to the base paper. Additionally， the air permeability dropped to 0.765 μm/(Pa·s)， indicating an 85.9% reduction compared to the base paper. Meanwhile， the mechanical properties of the paper were enhanced. The tensile strength index， tear index and bursting resistance index increased by 37.5%， 19.9%， and 56.7%， respectively， compared to the base paper. Furthermore， the functionalized paper could achieve complete biodegradation within 35 days in a natural environment. |
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