Material design using genetic algorithms and preparation of innovative UV‐reflecting composite

Abstract

Genetic algorithm (GA), which is one of the methods that optimize the combination of factors, was applied to the design of a new cosmetic material. GA effectively gives an adequate solution especially when there are huge factors and infinite combinations among those individual factors. In this work, the UV‐reflecting composite that effectively reflects UV light and has high visible light transparency was chosen as the target material. From GA simulation, a blueprint of the composite was obtained as follows: the multiple layers on the core material (mica) should be 27 nm titanium dioxide, 42 nm silica, 33 nm titanium dioxide, and 115 nm silica (from the inner layer). According to the results, the composite was prepared, and its cosmetic properties were evaluated. This composite showed both high UV reflection effect and good visible light transparency while having a smooth feeling on use, compared with the commercial ultra fine titanium dioxide.