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 

机构地区：[1]State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,China.

出　　处：《Journal of Bioresources and Bioproducts》2018年第2期59-64,共6页生物质资源与工程（英文）

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).

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 films.The 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 optimized.FT-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 network.The elastic modulus of CNFs/GA cross-linked film was 7.66GPa,62.98%higher than that of CNFs film.The water-resistance of the cross-linked CNFs/GA films was improved.The 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 water.This 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.

关 键 词：Cellulose nanofibers GLUTARALDEHYDE CROSSLINKING Elastic modulus WATER-RESISTANCE 

分 类 号：TB3[一般工业技术—材料科学与工程]