化工学报2016，Vol.67Issue(4)：1090-1097,8.DOI:10.11949/j.issn.0438-1157.20151264
Betaine·HCl-6EG-nNiCl2·6H2O低共熔离子液体的黏度和电导率
Viscosity and electrical conductivity of Betaine·HCl-6EG-nNiCl2·6H2O deep eutectic ionic liquids
摘要
Abstract
The viscosity and electrical conductivity of Betaine·HCl-6EG-nNiCl2·6H2O deep eutectic ionic liquids, formed by adding nickel(Ⅱ) chloride hexahydrate (NiCl2·6H2O) into a deep eutectic solvent (DES) composed of Betaine hydrochloride (Betaine·HCl) and Ethylene glycol (EG) in 1:6 molar ratio, were reported at 303—353 K and 303—348 K with an interval of 5 K under atmospheric pressure. The viscosity and electrical conductivity associated with temperature and NiCl2·6H2Oconcentration were investigated, respectively. The results revealed that within the selected temperature and NiCl2·6H2O concentration ranges, Betaine·HCl-6EG-nNiCl2·6H2O deep eutectic ionic liquids showed low viscosities and good electrical conductivities. With increasing temperature, the viscosities decreased and electrical conductivities increased. The effect of temperature was more significant on viscosity than on electrical conductivity. The dependence of temperature of viscosity and electrical conductivity was found to be greatly described by Arrhenius empirical expressions. According to these expressions, the activation energies for viscous flow and conduction were calculated. With increasing NiCl2·6H2O concentration, the values of the activation energies for viscous flow and conduction increased. Because of the adding NiCl2·6H2O, the formations of the larger size complex ions reduced the concentrations of the effective conductive ions and increased the ionic radius, resulting in increasing viscosity and decreasing electrical conductivity.关键词
盐酸甜菜碱-乙二醇低共熔溶剂/黏度/电导率/六水合氯化镍/离子液体/数值分析Key words
Betaine·HCl-6EG DES/viscosity/electrical conductivity/nickel(Ⅱ) chloride hexahydrate/ionic liquids/numerical analysis分类
数理科学引用本文复制引用
龚凯,华一新,徐存英,李坚,李艳,周忠仁..Betaine·HCl-6EG-nNiCl2·6H2O低共熔离子液体的黏度和电导率[J].化工学报,2016,67(4):1090-1097,8.基金项目
国家自然科学基金项目（51274108,21263007）。@@@@supported by the National Natural Science Foundation of China (51274108,21263007) （51274108,21263007）
