水/非イオン界面活性剤/長鎖アルコール系の相平衡と乳化の安定性に関する研究

概要

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A three-phase region of the W+D +Om type appeared in a water/nonionic surfactant/middle- or long-chain alcohol system, in which W was an excess water phase and Om, a nonaqueous reversed micellar solution phase. The D phase (surfactant phase), also called an anomalous or L<SUB>3</SUB> phase, differed from the other surfactant phase, D, which was usually observed in water/nonionic surfactant/hydrocarbon systems. In many linear-chain alcohol systems, the D phase was observed over a wide range of water/alcohol ratios, and a liquid crystal of lamellar type was present below the three-phase temperature. When branched alcohol was used, phase behavior changed and became similar to a three-phase region of the W+D+O type as in ordinary hydrocarbon systems. The solubilizing capacity of the D phase was much larger than that of the D phase. The appearance of D or D phases was dependent of the nature of the alcohol and surfactant.
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