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KMID : 0604520210470010001
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Journal of the Society of Cosmetic Scientists of Korea
2021 Volume.47 No. 1 p.1 ~ p.7
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Characteristics of Non-nano Needle Type Zinc Oxide and Its Application in Sunscreen Cosmetics
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Chong Kyo-Un
Xuan Song-Hua
Yoon Yeo-Min
Kim Sang-Uk
Choi Bou-Kun
Lee Sung-Ho
Park Soo-Nam
Lee Jong-Sung
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Abstract
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With increasing interest in the effectiveness and safety of sunscreen worldwide, research on the development of new inorganic sunscreen is also gaining momentum. In the present study, non-nano sized needle type zinc oxide, which can meet the regulation of nano-material as a recent problem, has been synthesized and surface-modified with cetyl alcohol to obtain needle type zinc oxide powder. Here, we also investigated their physical properties and evaluated their potential application as sunscreens. As a result of the experiment, the sunscreen with needle type zinc oxide powder, which was non-nano, showed similar UV-protection properties and transparency compare to that of 40nm size zinc oxide. It was further confirmed that the UV blocking effect was significantly increased when the needle type zinc oxide dispersion was applied to the sunscreen. Therefore, although the needle type zinc oxide is non-nano (200 nm) material, it has the potential to be applied to the product as an excellent transparency (improvement of whiteness), UV protection efficacy and smooth texture.
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KEYWORD
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needle type, zinc oxide, non-nano, cetyl alcohol, ultraviolet, W/O emulsion
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