手性离子液体1-丁基-3-甲基-咪唑乳酸盐及其与水二元混合物的体积性质和表面性质

Volumetric and Surface Properties of Chiral Ionic Liquid and Its Binary Mixture with Water

在293.15~343.15 K和常压下对手性离子液体1-丁基-3-甲基-咪唑乳酸盐的密度和表面张力进行了测定,并根据密度和表面张力对其体积性质和表面性质进行了计算;在298.15~318.15 K和常压下,对离子液体1-丁基-3-甲基-咪唑乳酸盐与水二元混合物的密度和表面张力在全摩尔浓度范围内进行了测定。在此基础上,对二元混合体系的过量摩尔体积进行了计算,根据Redlich-Kister方程对其进行了拟合,并对体系的热膨胀系数、偏摩尔体积、过量偏摩尔体积以及离子液体和水的表观摩尔体积进行了讨论,对二元混合物的表面性质进行了计算。

The density and surface tension of chrial ionic liquid 1-butyl-3-methyl-imidazolium L-lactate（ [bmim][L-lactate]） were measured from（ 293.15 to 343.15） K.The volumetric and surface properties of chrial [bmim][L-lactate] were obtained from experimental density and surface tension values.Density and surface tension were also determined for binary mixtures of [bmim][L-lactate] ＋ water system over the whole composition range from（ 298.15 to 318.15） K at atmospheric pressure.Based on the experimental data,excess molar volumes for the binary system were calculated and fitted to a Redlich-Kister equation.The thermal expansion coefficients,partial molar volume,excess partial molar volume and apparent molar volume of the component IL and water in the binary mixtures were discussed.The surface properties of the binary mixture were also calculated and studied.