1己基3甲基咪唑碘盐与分子溶剂二元体系密度和黏度  

Density and viscosity of binary 1-hexyl-3-methylimidazole iodide and molecular solvent

作　　者：余航 陈义峰[1] 叶南南 戴正兴 陆小华[1] 吉晓燕 YU Hang;CHEN Yifeng;YE Nannan;DAI Zhengxing;LU Xiaohua;JI Xiaoyan(State Key Laboratory of Materials-Oriented Chemical Engineering,Nanjing Tech University,Nanjing 211800,China;Energy Engineering,Division of Energy Science,Lule University of Technology,Lule 97187,Sweden)

机构地区：[1]南京工业大学材料化学工程国家重点实验室,江苏南京211800 [2]吕勒奥工业大学能源科学系能源工程系,瑞典吕勒奥97187

出　　处：《南京工业大学学报（自然科学版）》2023年第2期127-141,共15页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家自然科学基金(21838004);国家自然科学基金海外及港澳学者合作项目(21729601)。

摘　　要：本研究系统地测定了288.15~323.15 K条件下,1己基3甲基咪唑碘盐([Hmim][I])分别与甲醇(CH 3OH)、二甲基亚砜(DMSO)和异丙醇(IPA)组成的二元混合溶液体系在全浓度范围内的密度和黏度。通过密度和黏度数据分别计算了二元混合溶液体系的过量体积(V E)与黏度偏差(Δη),采用Redlich Kister方程对V E、Δη随溶液组成的变化进行回归,获得方程参数。结果表明:温度升高,二元混合溶液体系的密度和黏度均降低,随着[Hmim][I]含量增加,二元混合溶液体系密度和黏度均增加。V E和Δη呈负偏差,不同分子溶剂对V E和Δη的影响较大。溶剂的分子大小对二元混合溶液体系的V E影响较大,Δη受到分子溶剂分子体积、分子极性和介电常数等综合因素的影响,导致CH 3OH对其影响最大,IPA其次,DMSO最小。The density and viscosity of the binary mixed solution system composed of ionic liquid 1-hexyl-3-methylimidazole iodide([Hmim][I])and molecular solvents(methanol(CH 3OH),dimethylsulfoxide(DMSO)and isopropyl alcohol(IPA))under the conditions of 288.15323.15 K in the full compositional range were measured systematically in this study.The excess volume(V E)and viscosity deviation(Δη)of the binary mixed solution system were calculated by density and viscosity data respectively.The Redlich-Kister equation was used to regress V E andΔηwith the change of solution composition,and the equation parameters were obtained.Results showed that the density and viscosity of the binary mixed solutions decreased with the increase of temperature,and with the increase of[Hmim][I]content,the density and viscosity of the binary mixed solution system increased.V E andΔηhad negative deviation,and their magnitude strongly depended on the molecular solvents.The molecular size of solvents had a greater influence on V E,whereasΔηwas affected by the factors,including molecular solvent size,molecular polarity,and dielectric constant.CH 3OH had the greatest impact on the value ofΔη,followed by IPA,and DMSO had the least influence.

关 键 词：离子液体 密度 黏度 分子溶剂 Redlich Kister方程 

分 类 号：O645.1[理学—物理化学]