Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Microencapsulation of Surface-modified Carbon Black by Miniemulsion Polymerization

미니유화중합법에 의한 표면개질된 카본블랙의 마이크로캡슐화

  • Jang, Heang Sin (Department of Chemical Engineering, Inha University) ;
  • Hong, Jinho (Department of Chemical Engineering, Inha University) ;
  • Lee, Jeongwoo (Department of Chemical Engineering, Inha University) ;
  • Shim, Sang Eun (Department of Chemical Engineering, Inha University)
  • 장행신 (인하대학교 공과대학 화학공학과) ;
  • 홍진호 (인하대학교 공과대학 화학공학과) ;
  • 이정우 (인하대학교 공과대학 화학공학과) ;
  • 심상은 (인하대학교 공과대학 화학공학과)
  • Received : 2008.04.03
  • Accepted : 2008.04.22
  • Published : 2008.08.31
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Abstract

Carbon black has been widely used in composites, tonor resin, and ink materials. Since carbon black readily agglomerates, it is important to disperse carbon black in real applications. Aiming to improve dispersion stability, carbon black was chemically oxidized to possess hydroxyl groups using a phase transfer catalyst at room temperature. The modified carbon black (CB-OH) was grafted by a silane coupling agent, p-methylacryloxypropyltrimethoxysilane, to carry teminal vinyl groups. The modified carbon black was subsequently used in miniemulsion polymerization to achieve encapsulted core-shell structure. Finally, well-encapsulated carbon black by polymer was obtained in the size range of 100-500 nm. Throughout the polymerization, the effects of surface modification, types of monomers, initiators, and emulsifiers were investigated.

카본블랙은 토너수지, 잉크 및 복합재료 등에 광범위하게 산업적으로 응용되고 있다. 본 연구에서는 분산 안정성을 증대시키기 위하여 카본블랙을 상 이동 촉매(phase transfer catalyst)를 이용한 상온에서의 산화반응을 통하여 카본블랙(CB)-수산화기(OH)를 제조하여 이에, silane coupling-agent인 p-methylacryloxypropyltrimethoxysilane를 grafting시켜 말단에 이중결합을 가진 구조를 도입하였다. 이렇게 표면개질된 카본블랙을 미니유화중합법을 이용하여 고분자로 캡슐화를 진행하였다. 이러한 과정을 통하여 평균직경 100~500 nm 크기의 하이브리드 미립자를 제조하였다. 중합과정에 있어서 카본블랙의 표면 개질의 영향, 모노머의 종류, 개시제 및 유화제의 캡슐화 반응에 미치는 영향을 연구하였다.

Keywords

Acknowledgement

Supported by : 인하대학교

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