Surfactant-free Ionic Liquid Microemulsions of N, N-dimethylformamide, 1-butyl-3-methylimidazolium hexafluorophosphate, and toluene

文献类型: 外文期刊

第一作者: Yongjun Zheng

作者: Yongjun Zheng;Fei Meng;Mali Liu

作者机构:

关键词: Ionic liquid;surfactant-free microemulsion;UV-vis spectroscopy

期刊名称:JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY ( 影响因子:2.262; 五年影响因子:2.064 )

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收录情况: SCI

摘要: The phase diagram of a ternary system consisting of the hydrophobic ionic liquid (IL) 1-butyl-3-methylimidazolium hexafluorophosphate (bmimPF(6)), N, N-dimethylformamide (DMF), and toluene was prepared at 25 degrees C. A single-phase microemulsion and a multiphase region were demonstrated. The systems were nonaqueous IL microemulsions in the absence of traditional surfactants. The single-phase region could be divided into toluene-in-bmimPF(6), bicontinuous, and bmimPF(6)-in-toluene subregions by electrical conductivity, similar to the case of surfactant-based IL microemulsions. And by the use of methyl orange as an absorption probe, the polarity of the bmimPF(6)-in-toluene microemulsion was probed by UV-vis spectroscopy. The polarity of bmimPF(6) domains increased with increasing bmimPF(6) constant, and a relatively constant polarity was obtained when bmimPF(6) was increased to a certain extent.

分类号: O648

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