Microregion detection of ionic liquid microemulsions

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• 作者：Yanan Gao ; Suqing Wang ; Liqiang Zheng ; Shuaibing Han ; Xuan Zhang ; Deming Lu ; Li Yu ; Yongqiang Ji and Gaoyong Zhang
• 关键词：Microemulsion ; Ionic liquid ; Microstructure ; Conductivity ; Cyclic voltammetry
• 刊名：Journal of Colloid and Interface Science
• 出版年：2006
• 期刊代码：125_00219797
• 类别：ch
• 出版时间：15 September 2006
• 卷：301
• 期：2
• 页码：612-616
• 文件大小：193 K

摘要

Nonaqueous ionic liquid (IL) microemulsion consisting of IL, 1-butyl-3-methylimidazolium tetrafluoroborate (bmimBF₄), surfactant TX-100, and toluene was prepared and the phase behavior of the ternary system was investigated. Electrical conductivity measurement was used for investigating the microregions of the nonaqueous IL microemulsions. On the basis of the percolation theory, the bmimBF₄-in-toluene (IL/O), bicontinuous, and toluene-in-bmimBF₄ (O/IL) microregions of the microemulsions were successfully identified using insulative toluene as the titration phase. However, this method was invalid when conductive bmimBF₄ acted as the titration phase. The microregions obtained by conductivity measurements were further proved by electrochemical cyclic voltammetry experiments. The results indicated that the conductivity method was feasible for identifying microstructures of the nonaqueous IL microemulsions.