ABSTRACT
This chapter reviews the studies relevant to the dynamics of exchange of the microemulsion components between various environments. Most of the investigations performed on microemulsions deal with such aspects as stability, phase diagrams, structure, and interactions. Dynamics of the internal motions in the molecules of the various components of the microemulsion, with particular emphasis on the surfactant and cosurfactant. The state of water in oil (W/O) microemulsions has been the subject of many investigations involving both three-component alcohol-free microemulsions and four-component micro-emulsions. The ultrasonic relaxation method was used to detect the exchange of the surfactant between the interfacial film and the water phase in Oil-in-Water (O/W) microemulsion. It is generally agreed that in the water-rich region as well as in the oil-rich region of the water/surfactant/alcohol/oil phase diagrams, the O/W and W/O microemulsions contain small droplets of oil and water, respectively, coated by a mixed film of surfactant and alcohol.
