Abstracts: The properties and application of a novel amphiphilic polymer as an active interfacial modifier

Abstract

pp.247–253 A peptide/silicone hybrid functional polymer composed of silk peptide and silicone resin with a hydrophobic alkyl group was investigated for its compatibility and functionality as a cosmetic ingredient. We have found this polymer provides characteristic functions to modify and control various interfacial properties and named it active interfacial modifier (AIM‐FN). At the liquid/liquid interface, AIM‐FN worked as an excellent W/O emulsifier for various oils, polar or non‐polar, and even for silicone oil. In principle AIM‐FN stays at the interface between the aqueous phase and lipid phase because it is not compatible with either phase. At liquid/solid interfaces, the peptide moiety of AIM‐FN attaches to the hydrophilic solid surface and makes it water repellant and water proof with its hydrophobic silicone and alkyl residue. An emulsion formulated with AIM‐FN gives a non‐oily and non‐tacky skin feeling as AIM‐FN improves the solid/solid (skin/skin) surface property.