THERMODYNAMICS OF MICELLAR SYSTEMS - COMPARISON OF MASS-ACTION AND PHASE-EQUILIBRIUM MODELS FOR THE CALCULATION OF STANDARD GIBBS ENERGIES OF MICELLE FORMATION
THERMODYNAMICS OF MICELLAR SYSTEMS - COMPARISON OF MASS-ACTION AND PHASE-EQUILIBRIUM MODELS FOR THE CALCULATION OF STANDARD GIBBS ENERGIES OF MICELLE FORMATION
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DOI：
10.1016/0001-8686(95)00252-l
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发表时间：
1995-07-12
影响因子：
15.6
通讯作者：
SUBHA, MCS
中科院分区：
文献类型：
--
作者：
BLANDAMER, MJ;CULLIS, PM;SUBHA, MCS
胶束胶体与其他胶体的区别在于它们在溶液中单体、反离子和胶束之间的缔合-解离平衡。根据经典热力学，在固定温度和压力下胶束形成的标准吉布斯能与胶束的临界浓度有关。对于两种广泛用于描述胶束形成的模型，即相分离模型和质量作用模型，这种关系是不同的。本文对这些方法及其所依据的假设进行了分析。我们表明，这两个模型可以推广到包括具有不同化学计量的表面活性剂盐。
Micellar colloids are distinguished from other colloids by their association-dissociation equilibrium in solution between monomers, counter-ions and micelles. According to classical thermodynamics, the standard Gibbs energy of formation of micelles at fixed temperature and pressure can be related to the critical micelle concentration. This relation is different for two models which are widely used to describe micelle formation, namely the Phase Separation and the Mass Action Models. These approaches and the assumptions upon which they are based are analysed in this paper. We show that the two models can be generalised to include surfactant salts having different stoichiometries.