FTIR study of Tween80/1-butyl-3-methylimidazolium hexafluorophosphate/toluene microemulsions |
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Authors: | Yongjun Zheng Wumanjiang Eli Gang Li |
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Affiliation: | (1) Xinjiang Technology Institute of Physics and Chemistry, The Chinese Academy of Science, Urumqi, 830011, China;(2) Graduate University of the Chinese Academy of Sciences, Beijing, 100049, China |
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Abstract: | With the aid of Tween80, an environmentally benign nonionic surfactant applied to medicine and food industry, the ionic liquid (IL) 1-butyl-3-methylimidazolium hexafluorophosphate (bmimPF6) formed IL microemulsions with toluene. The phase diagram of the ternary system was prepared at 25 °C. It was demonstrated that there were a single-phase region and a multiple phase region in the ternary phase diagram. The single-phase region could be further divided into toluene-in-bmimPF6, bicontinuous, and bmimPF6-in-toluene microemulsion regions by electrical conductivity. In particular, the microstructural characteristics of the microemulsions were investigated by Fourier transform infrared spectroscopy. The results indicated that it was the hydrogen-bonded interactions between bmimPF6 and Tween80 that might be the driving force for the solubilization of bmimPF6 into the core of the Tween80 aggregates. |
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Keywords: | Microemulsion Ionic liquid Tween80 FTIR spectroscopy |
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