Spontaneous Emulsification Via Phase Inversion At Ambient Temperature For Stable N-Octane-Aerosol-OT/Water Microemulsions

Abstract

A reliable and straightforward way to prepare oil-in-water microemulsions based on AOT (Aerosol-OT, sodium 2-ethylhexylsulfosuccinate)-n-octane-AOT/water or NaCl by a spontaneous-emulsification technique via dilution-triggered isothermal phase inversion in an inexpensive yet procurable way is demonstrated. The salt content adjusts the behavior and resulting microemulsions with long-term stability in the aqueous phase. Sudan I azo dye as a model solute is used to demonstrate variations in the resulting microemulsions and opportunities for preconcentration/separation or solute solubilization.