ABSTRACT
Silicone emulsions have found wide application in the medical and pharmaceuti cal fields due to their desirable physical and chemical properties. For instance, silicone oil emulsions have been used for the preparation of elastomers used in controlled drug-delivery systems [1]. Simple aqueous [2] and nonaqueous sili cone oil emulsions (e.g., propylene glycol-in-silicone oil) and multiple emulsions [3] have become increasingly popular in the cosmetics industry mainly due to the desirable physical properties imparted from the silicone oils. These properties include a smooth, nongreasy feel and a wide range of available viscosities, which eliminates the need to use waxes in formulations. However, despite the extensive industrial use of silicone oil emulsions, the systematic study of their interfacial properties is only in its infancy.
