화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.34, No.2, 97-103, March, 2010
Export Citation
6FDA를 포함한 불소계 폴리이미드와 PMMA가 그래프트된 카본나노튜브 나노복합필름의 전기 전도성 연구
Electrical Conductivity Behavior of 6FDA-based Fluorinated Polyimide/PMMA-g-MWCNT Nanocomposite Film
윤성진, 임현구, 김주헌†
  • 중앙대학교 화학신소재공학부
Sungjin Yun, Hyungu Im, and Jooheon Kim†
  • School of Chemical Engineering & Materials Science, Chung-Ang University, Seoul 156-756, Korea
E-mail:
초록
6FDA를 포함한 다양한 폴리이미드/MWCNT의 전도성 복합 필름을 제조하기 위하여 MWCNT 표면에 PMMA를 도입하여 복합필름을 제조하였으며 전기 전도성의 변화를 PMMA-g-MWCNT의 농도 변화에 따라 관찰하였다. 6FDA계 폴리이미드계 복합 필름 내의 MWCNT 분산성은 PMMA-g-MWCNT의 경우 분자간의 상호 인력으로 인하여 분산도가 표면 처리하지 않은 MWCNT에 비하여 매우 높음을 확인하였다. 전기 전도도의 거동은 percolation threshold를 통하여 해석하였으며 그 결과 높은 임계 지수와 낮은 임계 농도를 가지는 6FDA-6FpDA/ PMMA-g-MWCNT 복합체가 DABA(diamino benzoic acid)를 포함한 폴리이미드 복합체에 비하여 높은 분산도를 가짐을 확인하였다.
PMMA was grafted on MWCNT surface in order to prepare conducting film composed of 6FDAbased polyimide/MWCNT. The electrical conductivity of 6FDA-based polyimide/PMMA-g-MWCNT was investigated as a function of PMMA-g-MWCNT content. Dispersion of MWCNT in 6FDA-based polyimide composite film was better than the pristine MWCNT due to the interaction force between PMMA and 6FDA-based polyimide. Electrical conductivity was interpreted by percolation threshold theory. As a result, 6FDA-6FpDA/PMMA-g-MWCNT which have high critical exponents and low critical concentration showed better dispersion than polyimide composite material that contains DABA(diamino benzoic acid).
Keywords:6FDA-based polyimide;PMMA;MWCNT;dispersty;percolation
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