Effective Formation of Silicone-in-Fluorocarbon-in-Water Double Emulsions: Studies on Droplet Morphology and Stability

Silicone-in-fluorocarbon-in-water double emulsions were prepared by controlling carefully the characteristics of the emulsions composed of silicone, perfluoropoly-ethoxymethoxy difluorohydroxyethyl ether (PFPE–OH) and fluorosurfactant. In the emulsion formulation, PFPE–OH incorporated had a great influence on the droplet morphology and the stability of double emulsions. Moreover, it was observed that among the fluorocarbons, the silicone-in-fluorocarbon-in-water double emulsions could be formed effectively in the presence of a fluorosurfactant. The double emulsions prepared in this study maintained their initial emulsion stability for a long time at high temperature, meaning great usefulness in the cosmetic industry.