Hydrogen bond producers in powerful protic ionic liquids for enhancing dissolution of natural cellulose  

作　　者：Shi-Peng Chen Dan-Yang Zhao Jin-Long Zhu Jing Wang Gan-Ji Zhong Hua-Dong Huang Zhong-Ming Li 

机构地区：[1]College of Polymer Science and Engineering,State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu,China

出　　处：《SusMat》2024年第5期189-201,共13页可持续发展材料（英文）

基　　金：Science and Technology Department of Sichuan Province,Grant/Award Number:2022YFH0094;National Natural Science Foundation of China,Grant/Award Numbers:51973141,52033005,U21A2090。

摘　　要：The manipulation of hydrogen bonding within protic ionic liquids is conducive to conquering the robust hydrogen bonding interactions in cellulose for its effective dissolution,but it is a great challenge to establish the delicate bal-ance of hydrogen bonding network between solvent and cellulose.Herein,we proposed the concept of“hydrogen bond producers”for urea molecules in 1,1,3,3-tetramethylguanidinium methoxyacetate acid([TMGH][MAA])to enhance the dissolution of cellulose.The optimization of physicochemical properties for[TMGH][MAA]solvent as a function of urea concentration revealed a remark-able increase in cellulose solubility from 13%to 17%(w/w)by adding only 0.25 wt%urea,highlighting the efficiency of[TMGH][MAA]as a power-ful solvent for the dissolution of cellulose.The experimental and simulation results verified that the significant improvement on dissolution of cellulose was attributed to the hydrogen bonding interaction of urea molecules with ion pairs and part of free ions,reducing the interference with the active ions bonded to cellulose.Furthermore,the considerable enhancement on compre-hensive properties of regenerated cellulose films demonstrated the effectiveness of[TMGH][MAA]/urea solvent.The concept of“hydrogen bond producers”presented here opens a new avenue for significantly enhancing the dissolu-tion of natural cellulose,promoting the sustainable development in large-scale processing of cellulose.

关 键 词：cellulose dissolution hydrogen bond producers protic ionic liquids 

分 类 号：O64[理学—物理化学]