Harrar, Agnes and Zech, Oliver and Hartl, Robert and Bauduin, Pierre and Zemb, Thomas and Kunz, Werner (2011) [emim][etSO(4)] as the Polar Phase in Low-Temperature-Stable Microemulsions. LANGMUIR, 27 (5). pp. 1635-1642. ISSN 0743-7463,
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We demonstrate here that microemulsions with an IL as the continuous phase can be formed so that they are stable over a wide temperature range and have intermediary properties between flexible and stiff microemulsions. Three components (1-ethyl-3-methylimidazolium ethylsulfate ([emim][etSO(4)]), limonene, and octylphenol ethoxylate (Triton X 100, abbreviated as TX-100)) were used. This ternary system has been characterized from ambient temperature down to - 10 degrees C by means of conductivity, viscosity, and small-angle X-ray scattering (SAXS) measurements. The SAXS data exhibit a characteristic single, broad scattering peak in conjunction with a typical q(-4) decay at large q values. The SAXS data have also been interpreted in terms of a dimensionless dilution plot, demonstrating that microstructures are neither isolated droplets nor a random flexible film structure but resemble molten liquid crystals (i.e., they are formed from locally cylindrical or planar structures). This semirigidity is attributed to a good match between the surfactant and the ionic liquid; this holds in a temperature range well below 0 degrees C.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | IONIC LIQUID MICROEMULSIONS; IN-OIL MICROEMULSIONS; ETHYLAMMONIUM NITRATE; SPONTANEOUS CURVATURE; REVERSE MICELLES; TRITON X-100; SCATTERING; WATER; MICROSTRUCTURE; HEXAFLUOROPHOSPHATE; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > Prof. Dr. Werner Kunz |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 25 Jun 2020 12:41 |
| Last Modified: | 25 Jun 2020 12:41 |
| URI: | https://pred.uni-regensburg.de/id/eprint/21214 |
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