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Issue 15, 2011
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Microemulsions with novel hydrophobic ionic liquids

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The phase behaviour of different ternary mixtures containing water, a hydrophobic ionic liquid (IL) and Triton X-100 have been examined as a function of surfactant concentration and temperature, maintaining equal volumes of water and IL. In all previously published studies on water–IL microemulsions the hydrophobic IL contained hexafluorophosphate (PF6) as anion. As this anion is not stable towards hydrolysis, our aim was to replace it by the hydrolysis-stable anion bis-triflimide (NTf2). The challenge was to find a suitable cation, which, in combination with the chosen anion, forms microemulsions with an efficiency equal or greater than reported values. The cation leading to the most efficient microemulsion was [ali336]+, which is based on the phase transfer catalyst aliquat 336. Thus the IL [ali336]NTf2 turned out to be a suitable choice for a hydrophobic room temperature IL which forms microemulsions of efficiencies comparable to those of water[bmim]PF6 systems, whilst being stable towards hydrolysis.

Graphical abstract: Microemulsions with novel hydrophobic ionic liquids

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Article information

05 May 2011
15 Jun 2011
First published
29 Jun 2011

Soft Matter, 2011,7, 6805-6810
Article type

Microemulsions with novel hydrophobic ionic liquids

J. H. Porada, M. Mansueto, S. Laschat and C. Stubenrauch, Soft Matter, 2011, 7, 6805
DOI: 10.1039/C1SM05821E

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