한국응용과학기술학회지 (Journal of the Korean Applied Science and Technology)

  • 제29권3호
  • /
  • Pages.377-392
  • /
  • 2012
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  • 1225-9098(pISSN)
  • /
  • 2288-1069(eISSN)
한국응용과학기술학회 (The Korean Society of Applied Science and Technology)
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피커링 에멀젼을 형판으로 하는 $SiO_2-TiO_2$ 다공성 분체의 제조

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

  • 이상길 (한불화장품(주) 기술연구소) ;
  • 김영호 (한불화장품(주) 기술연구소) ;
  • 홍준기 (한불화장품(주) 기술연구소) ;
  • 표형배 (한불화장품(주) 기술연구소) ;
  • 이동규 (충북대학교 공과대학 공업화학과)
  • 투고 : 2012.06.11
  • 심사 : 2012.09.21
  • 발행 : 2012.09.30
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초록

작은 고체 분체들은 피커링 유화 체계에서 안정화제로 작용하는 것은 이미 알려진 사실이다. 이 연구에서 우리는 알킬실란 처리 $TiO_2$와 n-헥실알코올, 수계로 안정한 피커링 에멀젼을 제조하였다. $TiO_2$ 입자에 의해 안정화된 피커링 에멀젼을 제조하기 위한 최적의 조건은 $TiO_2$ 입자의 양과 수상/유상의 비에 의해 결정된다. 피커링 에멀젼의 형태는 물과 n-헥실알코올에 대한 입자들의 젖음성에 의존된다. 피커링 에멀젼은 $TiO_2$가 5.00 wt%, 오일과 수상의 비가 3 : 7인 경우에 가장 안정하였다. 피커링 에멀젼을 형판으로 하여 무기 전조체를 졸-겔 공정에 의해 다공성 분체들이 합성되었다. 합성된 다공성 분체들은 광학 현미경, SEM, BET, XRD 및 EDS에 의해 확인되었다.

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.

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