Polymer(Korea) (폴리머)

The Polymer Society of Korea (한국고분자학회)
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Electrical Conductivity Behavior of 6FDA-based Fluorinated Polyimide/PMMA-g-MWCNT Nanocomposite Film

6FDA를 포함한 불소계 폴리이미드와 PMMA가 그래프트된 카본나노튜브 나노복합필름의 전기 전도성 연구

  • Yun, Sung-Jin (School of Chemical Engineering & Materials Science, Chung-Ang University) ;
  • Im, Hyun-Gu (School of Chemical Engineering & Materials Science, Chung-Ang University) ;
  • Kim, Joo-Heon (School of Chemical Engineering & Materials Science, Chung-Ang University)
  • 윤성진 (중앙대학교 화학신소재공학부) ;
  • 임현구 (중앙대학교 화학신소재공학부) ;
  • 김주헌 (중앙대학교 화학신소재공학부)
  • Received : 2009.09.22
  • Accepted : 2009.11.22
  • Published : 2010.03.25
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Abstract

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).

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.

Keywords

References

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