反气相色谱法测定离子液体1-己基-3-甲基咪唑三氟甲磺酸盐的热力学参数

doi:10.3724/SP.J.1123.2013.10006

色谱 ›› 2014, Vol. 32 ›› Issue (2): 169-173.DOI: 10.3724/SP.J.1123.2013.10006

反气相色谱法测定离子液体1-己基-3-甲基咪唑三氟甲磺酸盐的热力学参数

邓丽霜, 王强, 张正方, 唐军

新疆大学理化测试中心, 新疆乌鲁木齐 830046

收稿日期:2013-10-10 修回日期:2013-11-27 出版日期:2014-02-08 发布日期:2014-01-25
通讯作者: 王强
基金资助:
国家自然科学基金项目(21366029).

Determination of thermodynamic parameters for ionic liquid 1-hexyl-3-methylimidazolium trifluoromethansulfonate by inverse gas chromatography

DENG Lishuang, WANG Qiang, ZHANG Zhengfang, TANG Jun

Center for Physical and Chemical Analysis, Xinjiang University, Urumqi 830046, China

Received:2013-10-10 Revised:2013-11-27 Online:2014-02-08 Published:2014-01-25

摘要/Abstract

摘要：

采用反气相色谱法研究了343.15~373.15 K温度范围内离子液体1-己基-3-甲基咪唑三氟甲磺酸盐([HMIM]OTF)的热力学参数。根据18种探针溶剂的保留时间计算出探针溶剂与[HMIM]OTF之间的摩尔吸附焓、无限稀释的摩尔混合焓、摩尔蒸发焓、质量部分活度系数、Flory-Huggins相互作用参数及[HMIM]OTF的溶解度参数。结果表明，所选溶剂中正构烷烃、四氢呋喃、乙醚、环己烷和苯为[HMIM]OTF的不良溶剂；二氯甲烷、丙酮、氯仿、乙酸乙酯、四氯化碳、乙酸甲酯、甲苯和甲醇为[HMIM]OTF的良溶剂；运用外推法得到了室温(298.15 K)时[HMIM]OTF的溶解度参数为20.74 (J/cm³)^0.5。本研究为离子液体的应用及相关工作提供了参考。

关键词: Flory-Huggins相互作用参数, 反气相色谱, 离子液体, 溶解度参数

Abstract:

The thermodynamic parameters of ionic liquid 1-hexyl-3-methylimidazolium trifluoromethansulfonate ([HMIM]OTF) were investigated by inverse gas chromatography in the temperature range of 343.15-373.15 K. Eighteen probe solvents were used to calculate the molar enthalpy of sorption, molar enthalpy of mixing at infinite dilution, molar enthalpy of vaporization and the mass fraction activity coefficients. Furthermore, Flory-Huggins interaction parameters, the solubility parameter of the ionic liquid were calculated to judge the interactions between [HMIM]OTF and the 18 probes solvents. The results showed that among the selected solvents, n-C_6-9, tetrahydrofuran, diethyl ether, cyclohexane and benzene are the poor solvents for [HMIM]OTF, while dichloromethane, acetone, chloroform, ethyl acetate, carbon tetrachloride, methyl acetate, toluene and methanol are the favorite solvents for [HMIM]OTF. In addition, the solubility parameter of [HMIM]OTF at room temperature (298.15 K), which was obtained by linear extrapolation method, was 20.74 (J/cm³)^0.5. This study could be used as a reference to the application and research of the ionic liquids.

Key words: Flory-Huggins interaction parameter, inverse gas chromatography (IGC), ionic liquid, solubility parameter

中图分类号:

O658

邓丽霜, 王强, 张正方, 唐军. 反气相色谱法测定离子液体1-己基-3-甲基咪唑三氟甲磺酸盐的热力学参数[J]. 色谱, 2014, 32(2): 169-173.

DENG Lishuang, WANG Qiang, ZHANG Zhengfang, TANG Jun. Determination of thermodynamic parameters for ionic liquid 1-hexyl-3-methylimidazolium trifluoromethansulfonate by inverse gas chromatography[J]. Chinese Journal of Chromatography, 2014, 32(2): 169-173.

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反气相色谱法测定离子液体1-己基-3-甲基咪唑三氟甲磺酸盐的热力学参数

Determination of thermodynamic parameters for ionic liquid 1-hexyl-3-methylimidazolium trifluoromethansulfonate by inverse gas chromatography

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