Preferential Solubilization of Fragrances in Micelles with Different Geometric Shapes

Abstract

Surfactant self-assembled aggregates, the main components of consumer products, offer a solution for the solubilization of fragrances, which is crucial to the consumer’s product choice. The interactions between surfactant aggregates and fragrances are complex: surfactants influence fragrance release and performance, whereas fragrances affect the macroscopic properties of the formulation by changing the aggregate’s shape and size. The present chapter describes studies on the solubilization of some fragrance ingredients in spherical and cylindrical micelles for a better understanding of their influence on micellar structure, viscosity, conductivity, and solubilization capacity. Turbidity, conductivity, and viscosity measurements were performed simultaneously in order to monitor the solubilization of fragrance molecules and the geometric transition of the surfactant aggregate.