Stabilization of multiple emulsions using natural surfactants

Abstract

In an emulsion system, emulsifier is one of the most important substances as it determines the formation, stability and physicochemical properties of emulsions. In this study, the effects of emulsifier concentration, type of hydrophilic emulsifier, as well as portions of primary emulsion (weight) on the stability of W/O/W emulsions were investigated. Microscopy images of W/O/W emulsions indicated that the emulsions prepared with 0.5 gram of sodium caseinate have superior stability over other synthesis conditions. Finally, emulsions were prepared using different types of emulsifier (NaCN, Cremophor, Tween 60). Our results showed that emulsions made form Cremophor and Tween 60 in comparison with sodium caseinate possess smaller droplets size with enhanced stability.