Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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A Study of Various SiO2 Coating Control on White TiO2 Pigment for Cosmetic Applications

다양한 SiO2 코팅 제어를 통한 화장품용 루타일형 TiO2의 색상 및 물성 연구

  • Park, Minsol (Engineering Materials Center Korea Institute of Ceramic Engineering & Technology) ;
  • Shim, Wooyoung (Department of Materials Science & Engineering, Yonsei University) ;
  • Kim, YooJin (Engineering Materials Center Korea Institute of Ceramic Engineering & Technology)
  • 박민솔 (한국세라믹기술원 엔지니어링소재센터) ;
  • 심우영 (연세대학교 신소재공학과) ;
  • 김유진 (한국세라믹기술원 엔지니어링소재센터)
  • Received : 2022.04.15
  • Accepted : 2022.05.30
  • Published : 2022.06.28
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Abstract

Nanosized rutile titanium dioxide (TiO2) is used in inorganic pigments and cosmetics because of its high whiteness and duality. The high quality of the white pigments depends on their surface coating technique via the solgel process. SiO2 coatings are required to improve the dispersibility, UV-blocking, and whiteness of TiO2. Tetraethyl orthosilicate (TEOS) is an important coating precursor owing to its ability to control various thicknesses and densities. In addition, we use Na2SiO3 (sodium silicate) as a precursor because of its low cost. Compared to TEOS, which controls the pH using a basic catalyst, Na2SiO3 controls the pH using an acid catalyst, giving a uniform coating. The coating thickness of TiO2 is controlled using a surface modifier, cetrimonium bromide, which is used in various applications. The shape and thickness of the nanosized coating layer on TiO2 are analyzed using transmission electron microscopy, and the SiO2 nanoparticle behavior in terms of the before-and-after size distribution is measured using a particle size analyzer. The color measurements of the SiO2 pigment are performed using UV-visible spectroscopy.

Keywords

Acknowledgement

This work was supported by Industry Technology Innovation Program (10052730) and Industrial Innovation Program (20013429) fund by the Ministry of Trade, Industry and Energy (MOTIE), Republic of Korea.

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