Photoaging, the main cause of skin aging, is aging due to ultraviolet rays, and as interest in skin health and beauty has increased, sunscreen has become a necessity for modern people. Avobenzone is a typical organic sunscreen that absorbs UVA rays (3...
Photoaging, the main cause of skin aging, is aging due to ultraviolet rays, and as interest in skin health and beauty has increased, sunscreen has become a necessity for modern people. Avobenzone is a typical organic sunscreen that absorbs UVA rays (320–400 nm). However, exposure to ultraviolet light for a long period of time does not constantly block ultraviolet light because molecular structure is easily decomposed.
Therefore, the purpose of this study was to increase the duration of the UV protection effect by putting avobenzone in mesoporous silica and to reduce the risk of allergic or redness caused by exposure to the skin directly.
The surfactant cetrimonium methosulfate(CTMS) is distributed in distilled water to form a micelle, and the mixture of avobenzone dissolved in ethyl acetate(EA) and tetraethyl orthosilicate(TEOS), a silica precursor, is added to the medium and stirred to form a micelle containing avobenzone to synthesized spherical particles. When UVA absorption was checked through UV-VIS Spectroscopy after some time of UVA exposure using a UV Lamp(365nm), avobenzone reduced UVA blocking effect by approximately 35% in three hours, but the A-HMSN, which contained avobenzone, had little effect reduction after three hours. Therefore, unlike conventional sunscreen products that need to be applied several times after a certain period of time, products containing silica particles containing avobenzone can have a high UV protection effect over a long time. It will be able to develop low-irritation sunscreen products at the same time as increasing the duration of UV protection.