Design of Sustainable Color Cosmetic Emulsions with Biosurfactants and Particle Mixtures

Color cosmetics have been gaining a lot of attraction in the market over the past few years and there are many new product formats which are constantly coming in. However, these are all emulsions which are stabilized by non-natural surfactants. There is still a very strong consumer driver to have the same performance benefits, in terms of long lastingness, emulsion stability, rheology, sensory etc. but delivered through sustainable materials. In this study we developed completely sustainable emulsions using mixtures of biosurfactants and silica particles. These formulations have been developed into a range of product applications, such as lip products, face masks and primers. Surface tension measurements, bulk rheological measurements of G'-G'', viscosity vs shear rate, and interfacial rheology measurements were carried out on the biosurfactant mixtures together with the particulates. Synergistic interactions were seen which facilitate the emulsion performance in terms of emulsion stability, rheology, sensory etc. All product variations showed the efficacy which is expected. Different combinations of biosurfactants and particles will still need to be carried out to further improve the sensory, texture, and performance of these systems. We acknowledge Evonik for making this project possible.