화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Applied Chemistry for Engineering, Vol.21, No.5, 500-504, October, 2010
Export Citation
블렌딩을 이용한 폴리우레탄 그라프트 다중벽 탄소나노튜브/폴리우레탄 복합체의 전기 전도성 및 분산 특성
Dispersity and Electro-Conductivity of PU Grafted MWCNT/PU Composite via Simple Blending Method
윤성진, 임현구, 김주헌†
  • 중앙대학교 공과대학 화학신소재공학부
Sungjin Yun, Hyungu Im, and Jooheon Kim†
  • Department of Chemical Engineering, Chungang University, Seoul 156-756, Korea
E-mail:
초록
다중벽 탄소 나노튜브(Carbon nanotube, MWNTs)의 우수한 전기적 기계적 특성과 폴리우레탄의 우수한 기계적 물성을 이용하여 우수한 전기 전도성 복합체를 제조하기 위하여 말단기가 polyurethane로 기능화 된 탄소 나노튜브(PU-g-MWNTs)를 제조하였다. 말단기에 형성된 폴리우레탄과 고분자 메트릭스 간의 상용성으로 인한 계면 접합력으로 인해 기능화된 CNT 복합체 기능화 되지 않은 CNT에 비해 우수한 분산성을 나타내었다. PU-g-MWNT/PU 복합체의 전기 전도성을 PU-g-MWNT의 농도에 따라 측정하였으며 percolation threshold 이론에 의해 해석하였다. 그 결과 PU-g-MWNT/PU 복합체의 전기전도성은 임계농도 0.78 wt%과 임계지수 0.945를 가짐을 확인하였다.
The PU-g-MWNTs/PU film was synthesized by simple blending method to fabricate composites which have excellent mechanical and electrical properties. PU-g-MWNTs based composite revealed much enhanced dispersity than pristine MWNTs composite because of interfacial interaction related with interfacial compatibility between polymer matrix and PU on the MWNTs surface. The electro-conductivity of composite was measured as a function of PU-g-MWNTs concentration. The results were correlated with percolation threshold theory. As a result, the critical concentration and exponent of electro-conductivity behavior was equal to 0.78 wt% and 0.945.
Keywords:polyurethane;CNT;dispersion;electro-conductivity
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