应用化学2018，Vol.35Issue(4)：449-456,8.DOI:10.11944/j.issn.1000-0518.2018.04.170108
羧酸根阴离子型功能化离子液体对纤维素的溶解性能
Dissolution of Cellulose in Carboxylate-Based Task-Specific Ionic Liquids
摘要
Abstract
Carboxylate-based task-specific ionic liquids(ILs), viz., 1,3-dimethylimidazolium acetate ([C1mim][CH3COO])and 1,3-dimethylimidazolium hydroxylcarboxylate([C1mim][HOCH2COO]),have been synthesized, and used as the solvents for cellulose dissolution.The results show that the structure of anions has a significant influence on cellulose dissolution; and at 120 ℃, the solubility of cellulose in [C1mim][CH3COO]and[C1mim][HOCH2COO]can reach up to 19.7% and 21.2%, respectively.The structure and thermal stability of pristine and regenerated celluloses were characterized by Fourier transform infrared spectroscopy(FT-IR), X-ray diffraction(XRD), and thermogravimetry analysis(TGA)methods. These results demonstrate that the two ionic liquids are the direct solvent for cellulose,and also indicate that the transformation from cellulose I to amorphous cellulose occurrs after the dissolution and regeneration proces-ses in ionic liquids.Moreover,further analysis on the degree of polymerization(DP)of regenerated cellulose shows that the dissolution temperature and time have the negative effect on cellulose DP; and higher dissolution temperature or longer dissolution time affords the lower DP of regenerated cellulose.These results may serve as guidance for developing new cellulose solvent systems in the future.关键词
离子液体/纤维素/羧酸根/溶解/再生Key words
ionic liquid/cellulose/carboxylate/dissolution/regeneration分类
化学化工引用本文复制引用
马浩,廖春燕,樊梅林,刘薛恩,滕俊江,李凝..羧酸根阴离子型功能化离子液体对纤维素的溶解性能[J].应用化学,2018,35(4):449-456,8.基金项目
广东石油化工学院人才引进项目(2016rc06) （2016rc06）
广东省普通高校特色创新项目(2015KTSCX091) （2015KTSCX091）
广东石油化工学院大学生创新创业项目(2016pyA006)资助 Supported by the Talent Introduction Program of Guangdong University of Petrochemical Technology(No.2016rc06),the Ordinary University Innovation Project of Guangdong Province,China(No.2015KTSCX091),the Students Innovation and Entrepreneurship Training Program of Guangdong University of Petrochemical Technology(No.2016pyA006) （2016pyA006）
