화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.37, No.2, 162-166, March, 2013
Export Citation
그래핀 산화물-구형 고분자 입자 사이의 흡착 거동
Adhesion Behavior of Graphene Oxide on Spherical Polymer Particles
김신우1, 2, 이상수2, 이종휘1, †
  • 1중앙대학교 공과대학 화학신소재공학부
  • 2한국과학기술연구원 광전하이브리드연구센터
Sinwoo Kim1, 2, Sang-Soo Lee2, and Jonghwi Lee1, †
  • 1Department of Chemical Engineering and Materials Science, Chung-Ang University, Seoul, 156-756, Korea
  • 2Photo-Electronic Hybrids Research Center, Korea Institute of Science & Technology, Seoul 136-791, Korea
E-mail:
초록
고분자 입자에 그래핀이 코팅된 복합체를 제조하고 구조 및 형태변화를 통한 그래핀의 새로운 응용 가능성이 제기되고 있다. 그래핀이 표면에 흡착된 폴리스티렌 복합입자의 물성제어를 위해서, 물 분산매 하에 혼합방법과 혼합순서를 달리하여 흡착반응 시간과 혼합물 내의 순간적인 상대농도 차이를 조사하였다. 유화중합으로 중합된 폴리스티렌 입자에 폴리에틸렌이민을 흡착시켜 표면에 양전하를 갖게 만든 고분자 입자와, 흑연의 화학적 박리법으로 표면에 음전하를 갖도록 제조된 그래핀 산화물과의 서로 반대되는 전하를 갖는 두 입자의 흡착을 유도한 결과 흡착 반응 시간이 길수록, 순간 상대 농도차가 클수록 균질하게 표면 코팅이 만들어지고, 응집이 적은 복합 입자를 제조 할 수 있었다.
Graphene-coated polymer particles have attracted research interests due to their emerging applications derived from their controlled structure and morphology. To control the properties of graphene oxide (GO)-polystyrene (PS) composite particles, the adsorption time and instantaneous adsorption conditions were investigated by varying their mixing method. Polystyrene particles prepared by emulsion polymerization were modified to have positive surface charge by adsorption of polyethylene imine (PEI) on the surface of PS particles. GO prepared by the chemical exfoliation method had negative surface charge from the oxygenated groups. The adsorption of the negatively charged GOs onto the positively charged PS particles was successfully completed, and it was found that a longer adsorption time and a greater difference in the instantaneous relative concentration led PS-GO particles to have more homogeneously coated surfaces without aggregation.
Keywords:composite particle;graphene oxide;adhesion behavior;mixing method.
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