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KMID : 0604520190450040409
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Journal of the Society of Cosmetic Scientists of Korea
2019 Volume.45 No. 4 p.409 ~ p.414
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Shape Control of Silica-Polymethylsilsesquioxane (PMSQ) Composites by Varying Ratios of Precursors Yigun Choi†, Jongmin Choi, and Hyojoong Kim
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Choi Yi-Gun
Choi Jong-Min
Kim Hyo-Joong
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Abstract
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Silica and polymethylsilsesquioxane (PMSQ) are silicone powders widely used as cosmetics. We synthesized silica-PMSQ composites via sol-gel method using tetraethoxysilane (TEOS) and methyltrimethoxysilane (MTMS) as precursors of silica and PMSQ, respectively. Shape of the composites was controlled by varying the ratios of TEOS and MTMS, which were used as silane monomers. Silica-PMSQ composites showed three different shapes, which were sphere-shape, raspberry- shape, and donut- shape. All of them had soft touch, easy water dispersion, and soft focus effect in common. However, each shape showed some differences in sense of use, adhesion, and strength of the soft focus effect. Raspberry-shape composite had the strongest soft focus effect, donut-shape one had the strongest adhesion, and sphere-shape one had the best in softness. Thus, it is concluded that by varying the ratios of TEOS and MTMS silica-PMSQ composites could be easily synthesized into different shapes, providing various functions. This method can be applied to manufacture functional cosmetics.
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KEYWORD
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silica, polymethylsilsesquioxane, composite, morphology control, soft focus effect
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