离子液体二元溶液的临界现象

项目名称： 离子液体二元溶液的临界现象

项目编号： No.21303055

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 殷天翔

作者单位： 华东理工大学

项目金额： 25万元

中文摘要： 以一系列离子液体和不同链长的醇为研究体系，采用折射率法测量它们在液液临界点附近的共存曲线，采用DSC测量它们在一相区及两相区的热容，采用浊度仪测量它们在近临界一相区和两相区共存两相的浊度；通过数据分析得到临界指数和指前因子的标度关系，讨论它们的临界普适性和普适性类别。通过对共存曲线直径和渗透压缩系数不对称性的分析，拓展完全标度理论在离子溶液中的应用。

中文关键词： 离子液体；临界指数与指前因子；完全标度理论；临界不对称因子；临界跨接

英文摘要： The critical behaviors of a series of binary mixtures of ionic liquid + alchol will be studied. The liquid-liquid coexistence curves are determined by measuring the refractive index in two coexisting phases; the Micro-DSC is used to measure the heat capacities in both one-phase and two-phase regions; the turbidity measurement is carried out near the critical region both above and below the critical temperature.The obtained experimental data are analyzed to get the critical exponents and scaling relations of the critical amplitudes, which are used to discuss their critical universality. The analysis of the asymmetric behaviors of the coexistence curve diameter and the osmotic compressibility is conducted to extend the application of the complete scaling theory to ionic solutions.

英文关键词： Ionic liquid；critical exponents and critical amplitudes；complete scaling theory；critical asymmetric coefficient；crossover behavior