含非对称Gemini离子液体二元混合体系的体积和黏度性质  

Volumetric and viscosity properties of binary mixtures containing asymmetrical Gemini ionic liquid

作　　者：杨许召 王军 方云 YANG Xuzhao;WANG Jun;FANG Yun(Key Laboratory of Synthetic and Biological Colloids,Ministry of Education,School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,Jiangsu,China;Zhengzhou Key Laboratory of Fine Chemicals,School of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,Henan,China)

机构地区：[1]江南大学化学与材料工程学院,合成与生物胶体教育部重点实验室,江苏无锡214122 [2]郑州轻工业大学材料与化学工程学院,郑州市精细化学品重点实验室,河南郑州450002

出　　处：《化工学报》2019年第11期4131-4142,共12页CIESC Journal

基　　金：河南省科技攻关项目(162102210056);“十二五”国家科技支撑计划项目(2013BAC01B04);郑州市科技项目(141PQYJS555)

摘　　要：在温度分别为293.15、303.15、313.15、323.15和333.15 K及大气压下,系统测定了非对称Gemini离子液体,1-(3-(三甲基铵)丙-1-基)-3-甲基咪唑双氰胺盐([N111C3MIM][N(CN)2]2),分别与乙腈(Me CN)、甲醇(Me OH)、乙醇(Et OH)所组成的二元混合物的密度和黏度。由密度和黏度值分别计算了二元混合物的超额摩尔体积(V mE)和超额黏度(Δη)。VmE和Δη随组成的变化关系由Redlich-Kister方程进行了回归,得到方程参数。结果表明,V mE和Δη值与理想溶液间为负偏差,且存在最小值,说明二元体系中[N111C3MIM][N(CN)2]2和溶剂分子间相互作用力更强,同时与所研究分子的大小和形状的差异有关。同时,V mE和Δη随温度的变化关系表明,温度对研究混合物中的分子间相互作用有很大影响。Densities and dynamic viscosities of binary solutions containing asymmetrical Gemini ionic liquid(GIL),1-(3-(trimethylammonio)prop-1-yl)-3-methylimidazolium bis(dicyanamide)([N111C3MIM][N(CN)2]2)with acetonitrile(Me CN),methanol(Me OH)or ethanol(Et OH)over the entire mole fraction range have been measured from 293.15 K to 333.15 K under atmospheric pressure.Excess molar volumes(VmE)and excess viscosities(Δη )of the solutions were calculated based on the experimental density and viscosity values of pure[N111C3MIM][N(CN)2]2,molecular solvents,and their binary mixtures.The values of VmEand Δη were fitted by using the Redlich–Kister equations and the optimal fitting parameters were obtained.The results indicate that the values of VmEand Δη reveal negative deviations from ideal solutions.There exists a minimum excess values.Negative values of VmEand Δη for all the binary mixtures indicate,compared to pure[N111C3MIM][N(CN)2]2and molecular solvents,stronger interactions between[N111C3MIM][N(CN)2]2and Me CN,Me OH or Et OH.These negative values are also related to the difference in size and shape of the molecules studied.Moreover,the variation of VmEand Δη on temperature suggests that temperature has an enormous in fl uence on the intermolecular interactions between[N111C3MIM][N(CN)2]2and molecular solvents.

关 键 词：离子液体 二元混合物 密度 黏度 超额摩尔体积 超额黏度 

分 类 号：TQ013.1[化学工程]