微量量热法研究皂化盐Y(PMBP)_3·HA在有机相形成反向胶束的过程

Microcalorimetric Study on the Formation of Reversed Micell in Y(PMBP)_3·HA Organic Phase

研究了1-苯基-3-甲基-4-苯甲酰基-吡唑酮-5皂化盐Y(PMBP)3.HA在不同有机溶剂中形成反向胶束过程,获得了Y(PMBP)3.HA在有机相中的临界胶束浓度、聚集数,胶束生成常数和热力学函数。所得热力学函数为ΔrGmθ负值,并且随着溶剂碳原子数的增加而减少。ΔrHmθ为正值,并且随溶剂碳链的增长而增大,说明形成反向胶束的过程为吸热过程,ΔrSmθ值表明,形成胶束的过程为熵增加过程,且溶剂碳原子数越多熵增大的越大,由此可以断定,形成胶束的这一过程主要为熵控制过程。

The process of the formation of reversed micell in saponification-salt of Y（PMBP）3·HA in organic solvent has been studied.The thermodynamic functions and aggregation number（n）,micelle formation constant（K） have been calculated.Thermodynamic functions derived from the Gibbs free energy was negative,which decreased with the growth of the number of solvent carbon atoms.Enthalpy was positive,and increased with the mounting of carbon chain,which indicating the process of formation of reverse micelle was endothermic process,Enthropy values indicate that the formation of micelles during the process of entropy incease,and the number of carbon atoms in sovent.The more the greater the entropy increase,it can be concluded that the formation of micelles in this process is mainly entropy controlled process.