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http://dx.doi.org/10.12925/jkocs.2012.29.3.3

Preparation of $SiO_2-TiO_2$ Porous Composite Pigments Using a Pickering Emulsion Method as Template  

Lee, Sang-Gil (R&D Center, Hanbul Cosmetics Co. Ltd.)
Kim, Young-Ho (R&D Center, Hanbul Cosmetics Co. Ltd.)
Hong, Jun-Ki (R&D Center, Hanbul Cosmetics Co. Ltd.)
Pyo, Hyeong-Bae (R&D Center, Hanbul Cosmetics Co. Ltd.)
Lee, Dong-Kyu (Department of Industrial Chemistry, College of Engineering, Chungbuk National University)
Publication Information
Journal of the Korean Applied Science and Technology / v.29, no.3, 2012 , pp. 377-392 More about this Journal
Abstract
It has been known that small solid particles act as a stabilizer in pickering emulsion system. In this study, we successfully prepared stable pickering emulsion in n-hexylalcohol and water system with $TiO_2$ whose surface was treated by alkylsilane. The optimum condition to prepare pickering emulsion stabilized by $TiO_2$ particles was determined by amount of $TiO_2$ particles and ratio of water and oil phase. The type of pickering emulsion was dependent on wettability of particles for water and n-hexylalcohol. When the amount of $TiO_2$ particles increased up to 5.00 wt%, the stability of pickering emulsion was showed to be improved. The most stable pickering emulsion was prepared in the case of W/O type which has the ratio of oil and water phase (3 : 7). We tried to prepare porous $SiO_2-TiO_2$ composite pigments using a pickering emulsion as template at the optimal condition. Porous pigments were synthesized with Ludox HS-30 as an inorganic material by sol-gel process. The characteristics and shape of porous pigments were measured by optical microscope, SEM, BET, XRD and EDS.
Keywords
solid particles; wettability; stabilized emulsion type; W/O type emulsion; porous pigment;
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