Development and Characterization of an aqueous dispersion based nano zinc oxide for cosmetic application in sunscreens

摘要

Development of an additive based nanostructured zinc oxide nano through a grinding process and physicochemical surface functionalization allows the formation of a stable aqueous dispersion having high solids and thus, high capacity for absorption of ultraviolet radiation. Due this reason, it is an ideal product for using as a physical screen in cosmetic applications, providing the following benefits: Sun protection in the UVA region, the nano-ZnO is an excellent physical filter which has a solar radiation absorption throughout the UVA region and extends even UVB region, becoming in a complement for the physical filter based nano-TiO2. The solids content of the aqueous dispersion of nano ZnO was optimized up to 60% and through this concentration is possible to regulate the material incorporation in the formulation of cosmetic creams.