Improving the colloidal stability of Cellulose nano-crystals by surface chemical grafting with polyacrylic acid  

作　　者：Dong Cheng Yangbing Wen Xingye An Xuhai Zhu Xiaojuan Cheng Linqiang Zheng Joseph E Nasrallah 

机构地区：[1]Tianjin Key Laboratory of Pulp and Paper,Tianjin University of Science&Technology,Tianjin 300457,China [2]Limerick Pulp and Paper Center,University of New Brunswick,Fredericton,E3B 5A3,Canada

出　　处：《Journal of Bioresources and Bioproducts》2016年第3期114-119,共6页生物质资源与工程（英文）

基　　金：support from the Tianjin Municipal Science and Technology Commission (Grant No.12ZCZDGX01100).

摘　　要：Cellulose nano-crystals(CNC)can be tailored for various value-added applications.However,its use in aqueous systems is hampered by its limited dispersability,especially at a high CNC concentration.In this study,the improvement of CNC colloidal stability by surface chemical grafting with polyacrylic acid(PAA)was investigated,and the zeta potential and the charge density of the chemically modified CNC were analyzed.The results showed that an acrylic dosage of 1%(based on the dry weight of CNC)was sufficient to significantly enhance the colloidal stability.CNC,after chemical grafting with PAA,showed better stability against the increase in storage time or solid content of the aqueous medium,compared with the un-modified CNC.

关 键 词：cellulose nano-crystals(CNC) colloidal stability acrylic acid particle size zeta potential charge density 

分 类 号：O63[理学—高分子化学]