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Prepared and Properties of High-permeability CNF/Ring-topologically CNC Composite Film
Received:March 24, 2023  
DOI：10.11980/j.issn.0254-508X.2023.05.004
Key Words:cellulose nanofibril  rod-like cellulose nanocrystal  ring-topologically cellulose nanocrystal  air permeability  mechanical property
Fund Project:齐鲁工业大学（山东省科学院）生物基材料与绿色造纸国家重点实验室开放基金资助项目（GZKF202040）。
Author NameAffiliationPostcode
DU Peng College of Bioresources Chemical and Materials Engineering， National Demonstration Center for Experimental Light Chemistry Engineering Education， Key Lab of Paper Based Functional Materials of China National Light Industry， Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
XU Yongjian* College of Bioresources Chemical and Materials Engineering， National Demonstration Center for Experimental Light Chemistry Engineering Education， Key Lab of Paper Based Functional Materials of China National Light Industry， Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
LI Wenjing College of Bioresources Chemical and Materials Engineering， National Demonstration Center for Experimental Light Chemistry Engineering Education， Key Lab of Paper Based Functional Materials of China National Light Industry， Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
GU Shili College of Bioresources Chemical and Materials Engineering， National Demonstration Center for Experimental Light Chemistry Engineering Education， Key Lab of Paper Based Functional Materials of China National Light Industry， Shaanxi Province Key Lab of Papermaking Technology and Specialty Paper， Shaanxi University of Science & Technology， Xi’an， Shaanxi Province， 710021 710021
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Abstract:In this study， ring-topologically cellulose nanocrystal （RT-CNC） was obtained by concentrated sulfuric acid method and high-intensity ultrasonic treatment， and cellulose nanofibril （CNF）/RT-CNC films were prepared by vacuum filtration. The results showed that the ring-wall width and the length of RT-RNC were 3.5 nm and 10-50 nm， respectively， and its had significant hollow feature. The chemical structure of RT-CNC did not change and maintained the crystalline structure of cellulose I during the film formation process. The air permeability of CNF/RT-CNC film was 6.70 µm/（Pa·s）， which was increased by 168% compared with that of CNF film （2.50 µm/（Pa·s））. In addition， the CNF/RT-CNC film had the best thermal degradation performance.
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