Tailored biomimetic actuators made with multiwalled carbon nanotube loaded ionomeric nanocomposites

생체모방 액츄에이터용 다중탄소나노튜브/고분자 나노복합체

  • Lee, Se-Jong (Department of Advanced Materials Engineering, Kyungsung University) ;
  • Lee, Deuk-Yong (Department of Materials Engineering, Daelim College of Technology) ;
  • Lee, Myung-Hyun (Next Generation Enterprise Group, KICET) ;
  • Kim, Bae-Yeon (Department of Advanced Materials Engineering, University of Incheon)
  • Published : 2005.06.30

Abstract

Biomimetic actuators that can produce soft-actuation but large force capability are of interest. Nafion, an effective ionomeric material from DuPont, has been shown to produce large deformation under low electric fields (<10V/mm). Carbon nanotube/polymer nanocomposites were cast to enhance the electromechanical properties of the composites. Multiwalled carbon nanotube (M-CNT)/Nafion nanocomposites were prepared by a solution casting to investigate the effect of M-CNT loading in the range of 0 to 7 wt% on electromechanical properties of the M-CNT/Nafion nanocomposites. The measured elastic modulus and actuation force of the M-CNT/Nafion nanocomposites are drastically different, showing larger elastic modulus and improved electromechanical coupling, from the one without M-CNT.

부드럽지만 큰 변위를 발생시키는 생체모방 액츄에이터는 관심의 대상이 되어왔다. 특히, 듀폰사의 나피온 고분자는 작은 전기장하에서도 큰 변위를 나타내었다. 전기기계적 특성을 향상시키기 위하여 탄소나노튜브/고분자 나노복합체를 제조하였다. 다중 탄소나노튜브/나피온 나노복합체를 캐스팅법으로 제조하고 탄소나노튜브 첨가량에$(0{\sim}7wt%)$ 따른 나노복합체의 전기기계적 특성을 조사하였다. 탄소나노튜브가 첨가된 나노복합체는 탄소나노튜브가 없는 고분자 액츄에이터와 비교하여 우수한 탄성계수와 응력이 관찰되었다. 다중 탄소나노튜브의 첨가는 고기능성 생체모방 액츄에이터 특성을 증진시키는데 효과적이었다.

Keywords

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