Morphological transition and emulsification failure in globular microemulsions.
Morphological transition and emulsification failure in globular microemulsions.
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球状微乳液的形态转变和乳化失败。
DOI：
10.1063/1.3212002
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
S. Komura
中科院分区：
文献类型：
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作者：
N. Shimokawa;S. Komura
本文研究了在表面活性剂存在下，油分散在水中的微乳液液滴的凝聚转变。由于这种转变形成了宏观油相，因此称为“乳化失败”。“基于自由能方法，我们确定了球形和圆柱形液滴相之间的过渡线以及乳化失败的相边界线。通过改变表面活性剂单分子层的物理性质，如鞍展模量和自发曲率，计算相图。对于负的鞍展模量，球形液滴相与过量的油相共存。在某些情况下，预计会发生再入过渡（球体->圆柱体->球体）。对于一个积极的鞍展模量，该系统经历了一个直接的过渡，从圆柱形液滴相的宏观相分离状态。随着鞍展模量的增大，球-柱过渡线逐渐接近乳化失效边界。
We consider the condensation transition of microemulsion droplets of oil which are dispersed in water in the presence of surfactant. Since a macroscopic oil phase is formed due to this transition, it is called "emulsification failure." Based on the free energy approach, we determine the transition lines between the spherical and the cylindrical droplet phases as well as the phase boundary lines of the emulsification failure. The phase diagrams are calculated by changing the physical properties of the surfactant monolayer such as the saddle-splay modulus and the spontaneous curvature. For a negative saddle-splay modulus, the spherical droplet phase coexists with the excess oil phase. In some cases, a re-entrant transition (sphere-->cylinder-->sphere) is expected to take place. For a positive saddle-splay modulus, the system undergoes a direct transition from the cylindrical droplet phase to the macroscopically phase separated state. The sphere-to-cylinder transition line approaches the emulsification failure boundary as the saddle-splay modulus becomes larger.
DOI：
10.1007/978-94-011-2540-6
发表时间：
1992
期刊：
--
影响因子：
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作者：
Supramolecular Aggregates in Solution;Sow-Hsin Chen;John S. Huang;P. Tartaglia
通讯作者：
Supramolecular Aggregates in Solution;Sow-Hsin Chen;John S. Huang;P. Tartaglia