文献类型：期刊文献

英文题名：Multibranch Strategy To Decorate Carboxyl Groups on Cellulose Nanocrystals To Prepare Adsorbent/Flocculants and Pickering Emulsions

作者：Song, Mei-Li[1];Yu, Hou-Yong[1,2,3];Chen, Lu-Min[1];Zhu, Jia-Ying[1];Wang, Yan-Yan[1];Yao, Ju-Ming[1];Zhu, Zhuanyong[2];Tam, Kam Chiu[3]

机构：[1]Zhejiang Sci Tech Univ, Coll Mat & Text, Key Lab Adv Text Mat & Mfg Technol, Minist Educ, Xiasha Higher Educ Pk Ave 2 928, Hangzhou 310018, Zhejiang, Peoples R China;[2]Shaoxing Univ, Key Lab Clean Dyeing & Finishing Technol Zhejiang, 508 Huancheng West Rd, Shaoxing 312000, Peoples R China;[3]Univ Waterloo, Dept Chem Engn, Waterloo Inst Nanotechnol, 200 Univ Ave West, Waterloo, ON N2L 3G1, Canada

年份：2019

卷号：7

期号：7

起止页码：6969

外文期刊名：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000463462100056)、、EI(收录号：20191206673200)、Scopus(收录号：2-s2.0-85063132040)、WOS

基金：The work is supported by the international cooperation of Prof. Jaromir Marek and Key Program for International S&T Innovation Cooperation Projects of China [2016YFE0131400], Opening Project of Key Laboratory of Clean Dyeing and Finishing Technology of Zhejiang Province [Project 1811], Candidates of Young and Middle Aged Academic Leader of Zhejiang Province, "521" Talent Project of Zhejiang Sci-Tech University, and the Young Elite Scientists Sponsorship Program by CAST. The research funding from CelluForce and FP Innovations facilitated research on CNCs. K.C.T. wishes to acknowledge funding from CFI and NSERC.

语种：英文

外文关键词：Cellulose nanocrystals; Multibranch; Carboxyl content; Adsorption performance; Flocculation performance

外文摘要：A simple multibranch strategy was employed to increase the carboxyl contents on the cellulose nanocrystal (CNC) surface. The effects of various sequential grafting of ascorbic acid or citric acid on the morphology, microstructure, thermal stability, dye adsorption capability (methylene blue), and coagulation-flocculation capacity (model kaolin suspension) of the functionalized CNCs were investigated. Cellulose nanocrystals with multicarboxyl groups (CNC-g-AA-g-CA) showed better thermal stability (T-max = 359.3 degrees C), and possessed the highest carboxylic groups of 4.073 mmol/g, which led to a high absolute xi potential value up to 47.7 mV. Furthermore, the CNC-g-AA-g-CA exhibited excellent coagulation-flocculation capability to kaolin suspension with a turbidity removal rate of 91.07% and good cationic dye (methylene blue) removal rate of 87.8%, indicating that the CNC-g-AA-g-CA can be used as excellent adsorbent and efficient flocculants. In addition, CNC-g-AA-g-CA have good stabilizing effects on soybean oil/water Pickering emulsions, and the resultant Pickering emulsion volume can remain for 30 days or longer.