Acid-catalyzed crosslinking of cellulose nanofibers with glutaraldehyde to improve the water resistance of nanopaper

作     者：Aimin Tang Changyuan Yan Siyu Chen Degui Li 

作者机构：State Key Laboratory of Pulp and Paper EngineeringSouth China University of TechnologyGuangzhou 510640China. 

出 版 物：《Journal of Bioresources and Bioproducts》 (生物质资源与工程（英文）)

年 卷 期：2018年第3卷第2期

页      面：59-64页

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：the State Key Laboratory of Pulp and Paper Engineering,South China University of Technology(Grant No.2015C09,2016PY01) Natural Science Foundation of Guangdong Province(Grant No.2016A030311052) 

主　　题：Cellulose nanofibers Glutaraldehyde Crosslinking Elastic modulus Water-resistance 

摘      要：In this study,cellulose nanofibers(CNFs)were crossed-linked with glutaraldehyde(GA)under acid condition for tailoring the mechanical properties and water-resistance of nanopaper or *** impact of carboxyl content of CNFs,GA concentration,temperature,pH,and reaction time on the crosslinking was investigated,and the process conditions for the crosslinking were ***-IR analyses showed that CNFs/GA cross-linked nanopaper was successfully fabricated by acetalization between the-OH groups of CNFs and the-CHO groups of GA,resulting in the formation of a dense,three-dimensional *** elastic modulus of CNFs/GA cross-linked film was 7.66GPa,62.98%higher than that of CNFs *** water-resistance of the cross-linked CNFs/GA films was *** crossed-linked CNFs/GA films was still intact after 24 h after being immersed in water,while the CNFs films almost dissolved completely after 20 min of soaking in *** method provides a facile route to enhance the elastic modulus and water-resistance of CNFs for potential applications including bullet-proof glass interlayer,flexible electronic device,and new packing materials.