CuCl_(2)诱导咪唑离子液体水凝胶的相变  

CuCl_(2)-induced phase transition of imidazolium ionic liquid-water gel

作　　者：殷尧禹 彭亚光 马珺[1] 康欣晨[1] 韩布兴[1] Yaoyu Yin;Yaguang Peng;Jun Ma;Xinchen Kang;Buxing Han(Beijing National Laboratory for Molecular Science,CAS Key Laboratory of Colloid and Interface and Chemical Thermodynamics,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国科学院化学研究所,中国科学院胶体界面与化学热力学重点实验室,北京分子科学中心,北京100190

出　　处：《中国科学：化学》2022年第5期738-742,共5页SCIENTIA SINICA Chimica

基　　金：国家重点研发计划(编号:2017YFA0403101,2017YFA0403102);国家自然科学基金(编号:21890761,21733011)资助项目。

摘　　要：离子液体是一种具有诸多独特物理化学性质的绿色溶剂,在材料合成、化学反应、吸附分离、电化学等领域具有良好的应用前景.本文研究了1-癸基-3-甲基咪唑氯盐(Dmim Cl)/水/氯化铜三元体系的物理化学性质.研究发现,氯化铜对体系的相行为有着十分重要的影响.采用小角X射线散射(SAXS)、电导率、红外(IR)光谱等检测手段对混合体系进行研究.结果表明,当体系仅含有离子液体和水时,呈现凝胶状态,随着无机盐Cu Cl_(2)含量的增多,体系逐渐从凝胶逐渐向溶液状态转变.由于铜离子会破坏离子液体有序结构,有序的凝胶随Cu Cl_(2)含量的增加逐渐变为无序,最终在Cu Cl_(2)浓度达到17 wt%时凝胶变为溶液.Ionic liquids exhibit some unique properties,which result in great potential in materials synthesis,chemical reactions,adsorption and separation and electrochemistry,etc.In this work,the physicochemical properties of 1-decyl-3-methylimidazolium chloride(DmimCl)/water/CuCl_(2)system were explored.It was discovered that CuCl_(2)has a great impact on phase behavior.Small-angle X-ray scattering(SAXS),conductivity measurement,and infrared(IR)spectroscopy were used to characterize the microstructure of the system.It is demonstrated that the mixture is gelatinous in the absence of inorganic salt CuCl_(2),but it gradually becomes a solution with the increase of CuCl_(2)content.As CuCl_(2)is able to destroy the ordered structure of the gel,the system changes from order to disorder with increasing the content of CuCl_(2)and becomes solution at CuCl_(2)concentration of 17 wt%.

关 键 词：离子液体 凝胶 相行为 微观结构 

分 类 号：TQ427.26[化学工程]