Abstract

The thermodynamic theory of solubilization has been formulated with introducing the notion of standard solubilization affinity. An important component of this notion is the Laplace capillary pressure represented in the phase interpretation of the hydrocarbon core of a normal micelle. The partition coefficient of a solubilisate is also interpreted both in terms of a mole fraction within the formalism of chemical thermodynamics and in terms of concentration within the formalism of statistical mechanics. In contrast to the widespread approach using fictitious micellar “pseudophase,” this interpretation is based on the real physical picture of solubilisate partition between micelles and an ambient solution. Moreover, an exact solution has been presented for the problem of the effect of solubilization on the value of the critical micelle concentration (CMC). The consideration is based on the mass action law and new methods of defining the CMC via the constant of this law, aggregation number, and solubilisate concentration. The cases of solubilization from saturated (when studying solubility) and unsaturated (with an arbitrary concentration) solutions have been analyzed. However, the same result has been obtained in all variants, namely, solubilization decreases the CMC.

中文翻译：

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关于增溶的热力学

摘要

通过引入标准增溶亲和力的概念来形成增溶的热力学理论。该概念的重要组成部分是正常胶束烃核的相解释中表示的拉普拉斯毛细管压力。增溶物的分配系数还可以通过化学热力学形式上的摩尔分数和统计力学形式上的浓度来解释。与使用虚拟胶束“假相”的广泛方法相反，这种解释是基于胶束和环境溶液之间可溶物分配的真实物理图像。而且，对于增溶对临界胶束浓度（CMC）值的影响问题，已经提出了一种精确的解决方案。考虑因素是基于质量作用定律和通过该定律的常数，聚集数和可溶物浓度定义CMC的新方法。分析了从饱和（研究溶解度）和不饱和（浓度任意）溶液中溶解的情况。但是，在所有变体中都获得了相同的结果，即增溶降低了CMC。分析了从饱和（研究溶解度）和不饱和（浓度任意）溶液中溶解的情况。但是，在所有变体中都获得了相同的结果，即，增溶作用降低了CMC。分析了从饱和（研究溶解度）和不饱和（浓度任意）溶液中溶解的情况。但是，在所有变体中都获得了相同的结果，即，增溶作用降低了CMC。