β Scribed by Hironobu Kunieda; Noriaki Ushio; Akihiro Nakano; Makoto Miura
No coin nor oath required. For personal study only.
Interesting three-phase behavior was investigated in water/ sucrose monolaurate/tetraethyleneglycol dodecyl ether/heptane and water/sucrose dilaurate/octaethyleneglycol dodecyl ether/ heptane systems. The three-phase region is largely skewed to a higher temperature in a dilute region, and phase inversion in emulsion type is observed twice at a fixed composition in the former system. In contrast, the three-phase body is shifted toward lower temperatures with decreasing surfactant concentration in the latter system. Although a sucrose ester is a mixture of isomers, it can be treated as a pseudo-single component because its monodisperse solubilities in water and oil are very small. These phenomena were analyzed by an equation that describes a particular three-phase triangle in a space of compositions. The difference in monodisperse solubilities of each surfactant in oil causes the interesting three-phase behavior in the mixed surfactant system. The Hydrophile-Lipophile Balances (HLBs) of sucrose alkanoates were also evaluated from the three-phase behavior using the same equation. ΰΉ 1993 Academic Press, Inc.
π SIMILAR VOLUMES
Microemulsion phase behavior was studied as a function of salinity and temperature. The objectives were to investigate the influence of different electrolytes on optimal salinity and solubilization, and to relate the efficiency of each cation to change in microemulsion phase behavior. Two five-compo