反气相色谱法与汉森三维溶解度参数软件法测定四种咪唑基离子液体的溶解度参数

摘要

Inverse gas chromatography (IGC) was used to study solubility parameters of four imidazolium-base ionic liquids at 333.15, 343.15, 353.15, 363.15 and 373.15 K. Hansen solubility parameters of the four imidazolium-base ionic liquids were measured by Hansen solubility parameter in paractive (HSPiP) at 333.15 K. The solubility parameters of the four imidazolium-base ionic liquids measured by IGC at 333.15K are δ(EMIMOTF)=23.51(J?cm-3)1/2, δ(BMIMOTF)=23.39 (J?cm-3)1/2, δ(HMIMOTF)=22.79 (J?cm-3)1/2and δ(OMIMOTF)=22.31(J?cm-3)1/2. The solubility parameters of the four imidazolium-base ionic liquids measured by HSPiP at 333.15 K are δt(EMIMOTF)=24.28(J?cm-3)1/2,δt(BMIMOTF)=23.26(J?cm-3)1/2,δt(HMIMOTF)=22.79(J?cm-3)1/2and δt (OMIMOTF)=22.08 (J?cm-3)1/2. These results indicate that the two methods are consistent. HSPiP can simulate three-dimensional solubility parameter sphere of the ionic liquids, and good solvents or mixed solvents of the ionic liquids can be quickly selected according to the three-dimensional solubility parameter sphere. These results are helpful for the study of thermodynamic properties of ionic liquids and their solvent selection.%采用反气相色谱法(IGC)研究四种咪唑基离子液体在温度333.15、343.15、353.15、363.15、373.15 K时的溶解度参数,同时,采用汉森三维溶解度参数软件(HSPiP)模拟四种咪唑基离子液体在333.15 K 时的三维溶解度参数.333.15 K时,IGC测得的四种咪唑基离子液体的溶解度参数分别为δt(EMIMOTF)=23.51 (J?cm-3)1/2,δt(BMIMOTF)=23.39 (J?cm-3)1/2, δt(HMIMOTF)=22.79(J?cm-3)1/2,δt(OMIMOTF)=22.31(J?cm-3)1/2,333.15 K时,HSPiP得出的四种咪唑基离子液体的溶解度参数分别为δt(EMIMOTF)=24.28 (J?cm-3)1/2,δt(BMIMOTF)=23.26 (J?cm-3)1/2,δt(HMIMOTF)=22.79 (J?cm-3)1/2,δt(OMIMOTF)=22.08 (J?cm-3)1/2, IGC与HSPiP得出的溶解度参数值一致.根据HSPiP可以模拟出离子液体的三维溶解度参数球,并依据三维溶解度参数球可以快速准确地选取离子液体的良溶剂或混合溶剂.研究结果为离子液体的热力学性质研究及其溶剂选择等应用提供了参考.