Abstract:

Liquid crystal emulsion has a wide range of applications in the field of cosmetics, showing a variety of excellent properties. This article first introduces the microscopic morphology of the liquid crystal structure. Secondly, it summarizes the liquid crystal emulsifiers and the factors that affect the preparation of liquid crystal emulsion, including formula ingredients, emulsification method and emulsification process. Finally, the application advantages of liquid crystal emulsion in cosmetics are summarized, including the safety, efficacy, sensory and stability of cosmetics. Safety is mainly reflected in the packaging and sustained release of some active ingredients. The liquid crystal structure isolates the irritating active ingredients from the skin and interacts slowly with the skin. In terms of efficacy, the liquid crystal structure can encapsulate actives, thereby protecting unstable actives, slow-release actives, and promoting the penetration of actives on the skin. In terms of sensory properties, due to the layered structure of the lamellar liquid crystal, the layered structure can slide during the application process because it can improve the smearing feeling of the cosmetics during use. Finally, the application of liquid crystal emulsion in cosmetics with different efficacies, including moisturizing products and sunscreen products, is introduced, which aims to provide a theoretical basis for the preparation and application of liquid crystal emulsion.

Key words: liquid crystal emulsion, liquid crystal emulsifier, cosmetic