Cubic-Phase-Based Concentrated Emulsions.
Cubic-Phase-Based Concentrated Emulsions.
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DOI：
10.1006/jcis.1999.6646
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发表时间：
2000-03
影响因子：
9.9
通讯作者：
Rodríguez;Shigeta;Kunieda
中科院分区：
文献类型：
--
作者：
Rodríguez;Shigeta;Kunieda
通过相研究和小角x射线散射研究了不同类型的油对水-聚氧乙烯十二烷基醚(C（12)EO(25)）体系中不连续胶束型立方相形成的影响。随着油的加入，特别是短链烃的加入，立方相的热稳定性提高。而在庚烷体系中，由于形成了不同的液晶相，立方相的最高熔融温度低于癸烷。研究了多元醇对C(12)EO（25）立方相的影响。结果表明，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，不稳定效应变得越来越大。虽然油在立方相中的增溶作用很低，但可以吸收大量多余的油，形成透明的立方相基浓乳液。这种透明性是由于立方相和过量油相之间的折射率差别很小。学术出版社版权所有。
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.