NANO-EMULSION: A REVIEW ABOUT GENERAL INTRODUCTION, PREPARATION METHODS, EVALUATION AND SOME MARKETED NANOEMULSION FORMULATIONS

Abstract

Nano-emulsions are kinetically stable transparent nano-sized dispersions of oil-in-water (o/w) or water-in-oil (w/o) stabilized by an interfacial film of surfactant and co-surfactant. Due to their very small droplet size they are also known as sub-micron emulsion or mini emulsions. The efficacy of the nano-emulsion is enhanced by the nature and type of surfactant and co-surfactant which is employed in their formulation. This review specially focuses on the components used, advantages and disadvantages of nano-emulsions, methods of their preparation and few marketed preparations of Nano-emulsions.