纤维素在深度共熔溶剂中的溶解性能  

Solubility of cellulose in deep eutectic solvents

作　　者：杨靖雪 郎金燕 王娜 王欣辉 杨鸿燕 吴逊谦 王鸣宇 王铱 薛雨欣 张恒 YANG Jingxue;LANG Jinyan;WANG Na;WANG Xinhui;YANG Hongyan;WU Xunqian;WANG Mingyu;WANG Yi;XUE Yuxin;ZHANG Heng(College of Marine Science and Biological Engineering,Qingdao University of Science&Technology,Qingdao 266042,China;Key Laboratory of Biomass Chemical Engineering of Ministry of Education,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]青岛科技大学海洋科学与生物工程学院,山东青岛266042 [2]浙江大学生物质化工教育部重点实验室,浙江杭州310027

出　　处：《化工科技》2020年第5期16-21,共6页Science & Technology in Chemical Industry

基　　金：国家级大学生创新创业训练计划项目(201910426033);山东省自然科学基金项目(ZR2017MC032);山东省重点研发计划(公益性科技攻关类)项目(2019GGX102029);生物质化工教育部重点实验室(浙江大学)开放课题项目(2018BCE005)。

摘　　要：考察了以氯化胆碱为氢键受体合成的4种深度共熔溶剂(Deep eutectic solvents,DESs)的物理性质,分析了DESs种类[草酸/氯化胆碱(O-DES)、尿素/氯化胆碱(U-DES)、对甲苯磺酸/氯化胆碱(T-DES)和丙二酸/氯化胆碱(M-DES)]、黏度及电导率等特性对纤维素溶解性能的影响,以选择最合适的DESs作为溶剂溶解纤维素。通过XRD测试对DESs溶解纤维素的机制进行了初步探究,结果表明DESs对纤维素的溶解是破坏纤维素的不定型区以及分子内和分子间氢键。4种DESs中O-DES对纤维素的溶解率最高,其次为T-DES和M-DES,U-DES溶解效果最差,因此O-DES是4种DESs中的最佳纤维素溶剂。The physical properties of four deep eutectic solvents synthesized using choline chloride as a hydrogen bond acceptor were investigated,and the effects of DESs types[(Oxalic acid/Choline chloride,O-DES),(Urea/Choline chloride,U-DES),(Toluene-4-sulfonic acid/Choline chloride,T-DES),(Malonic acid/Choline chloride,M-DES)],viscosity and conductivity on the solubility of cellulose were analyzed.The most suitable DESs were selected as solvents to dissolve cellulose.The mechanism of DESs dissolving cellulose was initially investigated by XRD method.The dissolution of cellulose by DESs is to destroy the indefinite region,intramolecular and intermolecular hydrogen bonds of cellulose.Among the 4 DESs,O-DES has the highest dissolution rate for cellulose,followed by T-DES and M-DES,and U-DES has the worst dissolution effect.Therefore,O-DES is the best cellulose solvent among the 4 DESs.

关 键 词：纤维素 深度共熔溶剂 溶解 氢键 

分 类 号：TQ353[化学工程]