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| Betaine·HCl-6EG-nNiCl2·6H2O低共熔离子液体的黏度和电导率 | |
| 引用本文： | 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. DOI: 10.11949/j.issn.0438-1157.20151264 |
| 作者姓名： | 龚凯 华一新 徐存英 李坚 李艳 周忠仁 |
| 作者单位： | 昆明理工大学冶金与能源工程学院复杂有色金属资源清洁利用国家重点实验室, 云南 昆明 650093 |
| 基金项目： | 国家自然科学基金项目(51274108, 21263007)。 |
| 摘 要： | 在常压下303~353 K和303~348 K温度范围分别测定了低共熔溶剂盐酸甜菜碱-乙二醇(Betaine·HCl-6EG)中加入不同浓度NiCl2·6H2O形成的Betaine·HCl-6EG-nNiCl2·6H2O低共熔离子液体的黏度和电导率,研究了温度、NiCl2·6H2O浓度对其黏度、电导率的影响规律。结果表明,在所研究的温度和NiCl2·6H2O浓度范围内低共熔离子液体Betaine·HCl-6EG-nNiCl2·6H2O都具有较低的黏度和良好的导电性。随着温度的升高,黏度减小,电导率增大,温度对黏度的影响更显著;黏度、电导率与温度的关系均可以用Arrhenius经验公式描述,由此计算得到其黏滞活化能和电导活化能。随着NiCl2·6H2O浓度的增加,黏滞活化能和电导活化能均会增大;NiCl2·6H2O的加入使得离子液体形成尺寸较大的络合离子,导电离子的有效浓度降低、离子半径增大,导致其电导率减小、黏度增大。 |
| 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 |
| 收稿时间： | 2015-08-07 |
| 修稿时间： | 2015-12-14 |
Viscosity and electrical conductivity of Betaine·HCl-6EG-nNiCl2·6H2O deep eutectic ionic liquids |
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| GONG Kai,HUA Yixin,XU Cunying,LI Jian,LI Yan,ZHOU Zhongren. Viscosity and electrical conductivity of Betaine·HCl-6EG-nNiCl2·6H2O deep eutectic ionic liquids[J]. Journal of Chemical Industry and Engineering(China), 2016, 67(4): 1090-1097. DOI: 10.11949/j.issn.0438-1157.20151264 | |
| Authors: | GONG Kai HUA Yixin XU Cunying LI Jian LI Yan ZHOU Zhongren |
| Affiliation: | State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China |
| 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 NiCl2·6H2O concentration 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. |
| Keywords: | Betaine· HCl-6EG DES viscosity electrical conductivity nickel(Ⅱ) chloride hexahydrate ionic liquids numerical analysis |
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