Molecule Interaction in Mixed Micelle Formed by Oleyl Polyoxyethylene（20） and Tween80 System
Abstract：The surface tension of oleyl polyoxyethylene（20）（AEO20）with Tween80 was determined by a Wilhelmy type surface tension-meter.The influence of temperature on equilibrium surface tension was studied.The interactions between the two surfactant molecules in mixed micelle were studied through CMC,γCMC,pC20,Γmax,Amin.Moreover Clint＇s and Rubingh＇s treatments were used to analyze the molecular interaction parameters（βm） and the molecule exchange energy（εm）.For systems investigated,it showed that surface activity was advanced.There was a stronger synergistic mixing behaviour between AEO20 and Tween80 in some conditions.At 25℃ all mixtures showed synergism most evidently.At 30℃ and 35℃,when αAEO20 0.50 mixtures showed negative deviation,while βm and εm values of the mixed micelles ranged-1.84 and-12.47,-0.51 kJ/mol and-5.32 kJ/mol for all mixtures investigated.
Keywords：surfactant mixturessurface tensionmolecular interaction parameters（βm）molecule exchange energy（εm）
Publication Date：2011-01-01
Online Publishing Date：2026-08-28(First online date of this platform, not the publication date of the document)
Pages：5( 76-80 )