Rodríguez C, Shigeta K, Kunieda H
Division of Artificial Environments and Systems, Graduate School of Engineering, Yokohama National University, Tokiwadai 79-5, Hodogaya-ku, Yokohama, 240-8501, Japan
J Colloid Interface Sci. 2000 Mar 15;223(2):197-204. doi: 10.1006/jcis.1999.6646.
The effect of different types of added oil on the formation of a discontinuous micellar-type cubic phase was investigated in water-polyoxyethylene dodecyl ether (C(12)EO(25)) systems by phase study and small-angle X-ray scattering. The thermal stability of the cubic phase increases upon addition of oil, especially short-chain hydrocarbons. However, in the heptane system, the maximum melting temperature of the cubic phase is lower than that for decane due to the formation of a different liquid crystal phase. The effect of polyols on C(12)EO(25) cubic phases was also investigated. It was found that the thermal stability of the cubic phase decreases with polyol concentration. The destabilizing effect becomes large as the polyol molecule penetrates further into the surfactant palisade layer. Although the solubilization of oil in the cubic phase is very low, a large amount of excess oil can be incorporated and a transparent cubic-phase-based concentrated emulsion is formed. The transparency is attributed to the very small difference in the refractive indices between the cubic and excess-oil phases. Copyright 2000 Academic Press.
通过相研究和小角X射线散射，研究了在水-聚氧乙烯十二烷基醚（C(12)EO(25)）体系中不同类型的添加油对不连续胶束型立方相形成的影响。添加油后，尤其是短链烃，立方相的热稳定性增加。然而，在庚烷体系中，由于形成了不同的液晶相，立方相的最高熔化温度低于癸烷体系。还研究了多元醇对C(12)EO(25)立方相的影响。发现立方相的热稳定性随多元醇浓度的增加而降低。随着多元醇分子进一步渗透到表面活性剂栅栏层中，去稳定作用变得更大。尽管油在立方相中的溶解度非常低，但可以加入大量过量的油，形成基于透明立方相的浓乳液。透明度归因于立方相和过量油相之间的折射率差异非常小。版权所有2000年学术出版社。
