Kinetics of Triglyceride Solubilization by Micellar Solutions of Nonionic Surfactant and Triblock Copolymer. 2. Theoretical Model

摘要: A theoretical model of oil solubilization in micellar surfactant solutions is developed. We consider oils that are practically insoluble pure water, like triolein and other triglycerides. The nonionic micelles, which capable to solubilize such oils, usually rodlike aggregates, composed molecules poly(oxyethylene)-poly(oxypropylene) triblock copolymers, Synperonic L61 (SL61). swollen formed after solubilization, smaller than the empty ones. describes elementary act as a sequence three steps: (a) adsorption an micelle at oil-water interface; (b) uptake by adsorbed then splits into several micelles; (c) desorption micelles. Theoretical expressions derived, describe diminishing drop course solubilization. parameter values, determined from best fit experimental data, imply rate-controlling step adsorption. From rate constant we estimate respective kinetic barrier adsorption, taking account action surface forces hydrodynamic resistance. Our analysis indicates copolymer SL61 promotes triglycerides decreasing length mixed surfactant-copolymer leads lowering their interface.