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KMID : 0604520140400020121
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Journal of the Society of Cosmetic Scientists of Korea
2014 Volume.40 No. 2 p.121 ~ p.131
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Preparation of Silica Coated Zinc Oxide and UV Protection Effect
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Kim Won-Jong
Kang Kuk-Hyoun
Lee Gi-Yong
Kim Tae-Won
Choi Jong-Wan
Lee Dong-Gye
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Abstract
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Due to the high UV light scattering effect of Zinc oxide (ZnO), it is frequently used in sunscreen skincare products. Recently ZnO coated with silica has been used in cosmetics to improve UV protection, texture, decreased photocatalytic activity, dispersibility and stability of the skin care product. In this study, we developed a ZnO composite powder coated with silica for the future application to skincare products to block UV rays that could cause photoaging. To improve consumer's satisfaction rating, we used ZnO microparticles which are widely used in the cosmetics industry. The silica was coated using hydrothermal method with sodium silicate and acid hydrolysis. UV protection of the composite powder was analyzed by UV-Vis and in-vitro test and the advantages for practical use of this powder as a skincare product were determined.
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KEYWORD
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zinc oxide, UV protection, sodium silicate, silica, hydrothermal method
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