Formation of Microemulsions in Aqueous NaCl/Sodium (3-Dodecanoyloxy-2-Hydroxy-Propyl) Succinate/Glycerol Mono(2-Ethylhexyl) Ether/Oil Systems |
| |
| Authors: | Jin-Feng Kenji Aramaki Akihiro Ogawa Masahiko Tsukahara Hironobu Kunieda |
| |
| Institution: | 1. Graduate School of Environment and Information Sciences, Yokohama National University , Tokiwadai 79-7, Hodogaya-ku, Yokohama, 240-8501, Japan;2. Mitsubishi Chemical Corporation Research and Development Division , Yokohama Research Center , Kamosida-cho 1000, Aoba-ku, Yokohama, 227-8502, Japan;3. NIKKO CHEMICALS Co., Ltd. Cosmos, Research and Development , 3-24-3 Hasune, Itabashi-ku, Tokyo, 174-0046, Japan |
| |
| Abstract: | Sodium (3-dodecanoyloxy-2-hydroxy-propyl) succinate (SLGMS) forms microemulsions by mixing with cosurfactants such as glycerol mono(2-ethylhexyl) ether (MEH), although the combination with ordinary cosurfactant such as hexanol does not form a microemulsion of large solubilization. The middle-phase microemulsion coexists with excess water and oil (octane) phases at an optimum-mixing fraction of SLGMS and MEH in the presence of salt. The monomeric solubility of MEH in oil is low and MEH is mainly combined with SLGMS at an oil—water interface inside microemulsions. With decreasing salinity, the three-phase body shrinks and eventually disappears. The three-phase body may be terminated at a tricritical point, at which three phases simultaneously coexist. The effect of type of oil on the solubilization capacity of the microemulsions is also discussed. |
| |
| Keywords: | |
|
|
