复合离子液体中纤维素的催化分解

doi:10.3866/PKU.WHXB20110506

物理化学学报 >> 2011, Vol. 27 >> Issue (05): 995-999.doi: 10.3866/PKU.WHXB20110506

复合离子液体中纤维素的催化分解

龙金星, 郭斌, 李雪辉, 王芙蓉, 王乐夫

华南理工大学化学与化工学院, 制浆造纸国家重点实验室, 广州 510640

收稿日期:2011-01-12 修回日期:2011-03-15 发布日期:2011-04-28
通讯作者: 李雪辉 E-mail:cexhli@scut.edu.cn
基金资助:
国家自然科学基金(20876055, 21076085)及华南理工大学高校业务基金资助项目

Catalytic Decomposition of Cellulose in Cooperative Ionic Liquids

LONG Jin-Xing, GUO Bin, LI Xue-Hui, WANG Fu-Rong, WANG Le-Fu

School of Chemistry and Chemical Engineering, Pulp & Paper Engineering State Key Laboratory of China, South China University of Technology, Guangzhou 510640, P. R. China

Received:2011-01-12 Revised:2011-03-15 Published:2011-04-28
Contact: LI Xue-Hui E-mail:cexhli@scut.edu.cn
Supported by:
The project was supported by the National Natural Science Foundation of China (20876055, 21076085) and Fundamental Research Funds for the Central Universities, SCUT, China.

摘要/Abstract

摘要：

通过将酸性功能化离子液体与对纤维素具有溶解作用的离子液体进行复合, 构建了一类新型的高效催化纤维素分解的体系, 并采用热重(TG)分析方法, 研究了复合离子液体中纤维素的分解行为. 结果表明: 复合离子液体中纤维素的分解温度明显降低, 溶于离子液体中的纤维素可被酸性离子液体原位催化分解. 纤维素的分解温度受离子液体催化剂的酸性及纤维素在复合离子液体中的溶解度影响明显: 酸性越强, 溶解度越大, 纤维素的分解温度越低.

关键词: 复合离子液体, 纤维素, 催化分解, 热重, 酸强度

Abstract:

Cellulose, the abundant and cost-ineffective resource, is considered to be a perfect alternative for the alleviation of energy crisis and environmental pollution. However, most processes for the treatment of cellulose are rigor currently as it is insoluble in water and conventional organic solvents due to its strong intra and inter-molecular hydrogen bonds, where the phase problem hampers its utilization widely. Here, we built a novel and efficient cooperative ionic liquid pairs system for the low temperature catalytic conversion of cellulose, which was constructed through the combination of an acidic ionic liquid catalyst and a cellulose soluble ionic liquid solvent. The catalytic decomposition behavior of microcrystal cellulose in this vigorous catalytic system was studied intensively by thermogravimetry (TG). Results show that the decomposition temperature of cellulose decreases greatly in all cooperative ionic liquid pairs, cellulose dissolved in ionic liquid solvents can be in situ catalytic decomposed by acidic ionic liquids. Furthermore, the decomposition temperature is dependent on the acidic strength of the ionic liquid catalysts, stronger acidity results in a lower decomposition temperature of the cellulose. Moreover, we found that cellulose can be decomposed at lower temperature when the ionic liquid with higher solubility of cellulose is used.

Key words: Cooperative ionic liquid, Cellulose, Catalytic decomposition, Thermogravimetry, Acidic strength

MSC2000:

O642

龙金星, 郭斌, 李雪辉, 王芙蓉, 王乐夫. 复合离子液体中纤维素的催化分解[J]. 物理化学学报, 2011, 27(05): 995 -999.

LONG Jin-Xing, GUO Bin, LI Xue-Hui, WANG Fu-Rong, WANG Le-Fu. Catalytic Decomposition of Cellulose in Cooperative Ionic Liquids[J]. Acta Phys. -Chim. Sin., 2011, 27(05): 995 -999.

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复合离子液体中纤维素的催化分解

Catalytic Decomposition of Cellulose in Cooperative Ionic Liquids

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