色谱 ›› 2015, Vol. 33 ›› Issue (11): 1192-1198.DOI: 10.3724/SP.J.1123.2015.04041

• 研究论文 • 上一篇    下一篇

反气相色谱法表征离子液体1-丁基-3-甲基咪唑四氟硼酸盐的溶解度参数(英文)

马晓红, 王强, 李晓萍, 唐军, 张正方   

  1. 新疆大学理化测试中心, 新疆 乌鲁木齐 830046
  • 收稿日期:2015-04-22 出版日期:2015-11-08 发布日期:2012-05-30
  • 通讯作者: 王强
  • 基金资助:

    National Natural Science Foundation of China (Grant No. 21366029).

Determination of the solubility parameter of ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate by inverse gas chromatography

MA Xiaohong, WANG Qiang, LI Xiaoping, TANG Jun, ZHANG Zhengfang   

  1. Center for Physical and Chemical Analysis, Xinjiang University, Urumqi 830046, China
  • Received:2015-04-22 Online:2015-11-08 Published:2012-05-30
  • Supported by:

    National Natural Science Foundation of China (Grant No. 21366029).

摘要:

采用反气相色谱法(IGC)表征了离子液体1-丁基-3-甲基咪唑四氟硼酸盐([BMIM]BF4)在333~373 K温度范围内的热力学参数。使用两组不同化学结构和性质的探针分子测定了[BMIM]BF4与溶剂之间的相互作用力。根据探针分子的保留时间计算得到探针分子与[BMIM]BF4之间的摩尔吸附焓、质量分数活度系数、Flory-Huggins相互作用参数和[BMIM]BF4的溶解度参数。结果表明,所选溶剂中n-C10n-C11n-C12、四氯化碳,环己烷和甲苯为[BMIM]BF4的不良溶剂;二氯甲烷、丙酮、氯仿、乙酸甲酯、乙醇、甲醇为[BMIM]BF4的良溶剂。运用外推法得到了[HMIM]BF4在室温(298.15K)时的溶解度参数为23.39 (J/cm3)0.5。实验结果证明IGC法是一种简便准确的获得离子液体热力学参数的方法。本研究为离子液体的应用及相关工作提供了理论参考。

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

Abstract:

Thermodynamic properties of ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM]BF4) were determined via inverse gas chromatography (IGC). Two groups of solvents with different chemical natures and polarities were used to obtain information about [BMIM]BF4-solvent interactions. The specific retention volume, molar heat of sorption, weight fraction activity coefficient, Flory-Huggins interaction parameter as well as solubility parameter were also determined in a temperature range of 333-373 K. The results showed that the selected solvents n-C10 to n-C12, carbon tetrachloride, cyclohexane and toluene were poor solvents for [BMIM]BF4, while dichloromethane, acetone, chloroform, methyl acetate, ethanol and methanol were favorite solvents for [BMIM]BF4. In addition, the solubility parameter of [BMIM]BF4 was determined as 23.39 (J/cm3)0.5 by the extrapolation at 298 K. The experiment proved that IGC was a simple and accurate method to obtain the thermodynamic properties of ionic liquids. 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 (IL), solubility parameter

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