Water Solubilization and Chain Length Compatibility in Nonionic Microemulsions
Water Solubilization and Chain Length Compatibility in Nonionic Microemulsions
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DOI：
10.1006/jcis.1995.1053
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发表时间：
1995-02
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影响因子：
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通讯作者：
N. Garti;A. Aserin;S. Ezrahi;E. Wachtel
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文献类型：
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作者：
N. Garti;A. Aserin;S. Ezrahi;E. Wachtel
BSO （Bansal, Shah， O'Connell）方程（J.胶体界面科学，75,462,1980）作为阴离子表面活性剂稳定微乳中最大水溶性的经验条件，与助表面活性剂（醇）和油链长度有关。本研究首次检验了该方程对非离子微乳的适用性。通过构造伪三元相图，测量单相区域面积和边界处的含水量，我们发现，只有当醇在水相和油相中的溶解度都受到限制时，其增溶能力才与醇链长度直接相关。此外，我们试图将链长兼容性的概念与界面的自然曲率和临界半径之间的竞争相结合。统一实验结果的尝试可以为微乳液体系的优化提供指导。
Abstract The BSO (Bansal, Shah, O'Connell) equation (J. Colloid Interface Sci. 75, 462, 1980) was derived as an empirical condition for maximum water solubilization in microemulsions stabilized by anionic surfactants, in relation to the cosurfactant (alcohol) and oil chain lengths. The present study examines, for the first time, the applicability of this equation for nonionic microemulsions. By constructing pseudo-ternary phase diagrams and measuring the area of the single phase regions as well as the water contents at the boundary, we find that the solubilization capacity is directly related to the alcohol chain length only if the alcohol solubility in both the aqueous and oleic phases is limited. In addition, we try to integrate the concept of chain length compatibility with the competition between the natural curvature and the critical radius of the interface. The attempt to unify the experimental results may serve as a guideline for optimization of microemulsion systems.