Vapor Pressure Studies of the Solubilization of Hydrocarbons by Surfactant Micelles. First Annual Report, September 1, 1981-September 30, 1982

摘要

Vapor pressure solubilization techniques developed in our laboratory have been used to obtain unique information about the interaction of hydrocarbons with micelles and monomers of aqueous anionic surfactants. Recent results for benzene-octylsulfate system have led to the determination of accurate thermodynamic constants characterizing the transfer of benzene into the octylsulfate micelles and the interaction of benzene molecules within the micelles. A new model for solubilization has been proposed, using the Poisson distribution equations as a point of departure for predicting the behavior of hydrocarbon-surfactant micelle systems throughout the range of accessible hydrocarbon and surfactant activities. Research is in progress to determine the influence of added NaCl and cosurfactant species on the formation of solubilizates of hydrocarbons. Attempts are also being made to infer surfactant monomer activities from surface tension-composition isotherms and vapor pressure osmometry measurements. (ERA citation 08:015628)