3种咪唑类离子液体的物理性质研究  

Physical Properties of Three Imidazolium-based Ionic Liquid

作　　者：崔丽虹[1] 魏晓奕[1] 王蒙[2] 李积华[1] 

机构地区：[1]中国热带农业科学院农产品加工研究所,广东湛江524001 [2]华中农业大学食品科技学院,湖北武汉430070

出　　处：《广州化工》2017年第11期98-100,共3页GuangZhou Chemical Industry

基　　金：海南省自然科学基金(No.313051);中国热带农业科学院中央级公益性科研院所基本科研业务费专项(1630122017T26)

摘　　要：咪唑类离子液体是目前应用最多的离子液体之一,然而有关其物理化学性质的研究较少。为了给离子液体的工业应用提供数据参考,本文合成了3种常用的咪唑类离子液体1-乙基-3-甲基咪唑磷酸二乙酯([Emim]DEP)、1-乙基-3-甲基咪唑醋酸([Emim]Ac)和1-丁基-3-甲基咪唑氯([Bmim]Cl),测定了它们的密度、黏度、玻璃态转化温度(Tg)和酸度离解常数(p Ka),并研究了它们的热稳定性。在3种离子液体中,[Emim]DEP热稳定性最好且黏度较低,具有更广阔的工业应用前景。Imidazolium-based ionic liquid is currently one of the most applications of ionic liquids. However, there are few studies about its physical and chemical properties. To make data reference for the industrial application of ionic liquids, three commonly used imidazolium-based ionic liquids, [Emim] DEP, [Emim] Ac and ]Bmim] Cl, were synthesized. Their density, viscosity, Tg and pKa were measured. Their thermal stability was also investigated. Among the three ionic liquids, [Emim] DEP had the best thermal stability and lower viscosity. So it had a broad prospect of industrial application.

关 键 词：离子液体 密度 黏度 玻璃态转变温度 热稳定性 

分 类 号：O645[理学—物理化学]