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-C10、n-C11、n-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。
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]BF4was determined as23. 39（J / cm3）0. 5by 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.
出处
《色谱》
CAS
CSCD
北大核心
2015年第11期1192-1198,共7页
Chinese Journal of Chromatography
基金
National Natural Science Foundation of China(Grant No.21366029)
