Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Investigation of Mechanical and Electrical Properties of Hybrid Composites Reinforced with Carbon Nanotubes and Micrometer-Sized Silica Particles

탄소나노튜브 및 실리카 입자로 강화된 하이브리드 복합재료의 기계적, 전기적 물성에 관한 연구

  • Oh, Yun (Division of Mechanical Design Engineering, Chonbuk Nat'l Univ.) ;
  • You, Byeong Il (Division of Mechanical Design Engineering, Chonbuk Nat'l Univ.) ;
  • Ahn, Ji Ho (Division of Mechanical Design Engineering, Chonbuk Nat'l Univ.) ;
  • Lee, Gyo Woo (Division of Mechanical Design Engineering, Chonbuk Nat'l Univ.)
  • 오윤 (전북대학교 기계설계공학부) ;
  • 유병일 (전북대학교 기계설계공학부) ;
  • 안지호 (전북대학교 기계설계공학부) ;
  • 이교우 (전북대학교 기계설계공학부)
  • Received : 2016.06.09
  • Accepted : 2016.09.01
  • Published : 2016.12.01
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Abstract

In this study, to enhance the electrical insulation of composite specimens in addition to the improved mechanical properties, the epoxy composite were reinforced with carbon nanotubes and silica particles. Tensile strength, Young's modulus, dynamic mechanical behavior, and electrical resistivity of the specimens were measured with varied contents of the two fillers. The mechanical and electrical properties were discussed, and the experimental results related to the mechanical properties of the specimens were compared with those from several micromechanics models. The hybrid composites specimens with 0.6 wt％ of carbon nanotubes and 50 wt％ of silica particles showed improved mechanical properties, with increase in tensile strength and Young's modulus up to 11％ and 35％, respectively, with respect to those of the baseline specimen. The electrical conductivity of the composite specimens with carbon nanotubes filler also improved. Further, the electrical insulation of the hybrid composites specimens with the two fillers improved in addition to the improvement in mechanical properties.

본 연구에서는 기계적 물성을 개선함과 동시에 전기 절연성을 부여하기 위해 에폭시 수지에 탄소나노튜브와 실리카 입자를 혼입하여 하이브리드 복합재료를 제작하였다. 두 충전제의 함량을 변화시켜 제작한 시편으로 인장강도, 영률, 동적기계분석 그리고 전기 비저항을 측정하였으며, 이를 통해 기계적, 전기적 물성을 고찰하였다. 또한 하이브리드 복합재료 시편의 기계적 물성을 평가하고자 영률을 측정한 결과와 미시역학 모델을 이용해 계산한 결과를 비교하였다. 탄소나노튜브 함량 0.6 wt%와 실리카 함량 50 wt%를 첨가하여 제작한 하이브리드 복합재료 시편에서 인장강도 및 영률은 에폭시 복합재료 시편 대비 각각 약 11 %와 35 %의 증가를 보여 가장 높은 기계적 물성을 나타내었다. 에폭시 수지에 전도성 충전제인 탄소나노튜브를 분산시키면 전기 전도성이 향상되었으며, 여기에 절연성 충전제인 실리카를 추가로 혼입한 하이브리드 복합재료 시편에서는 개선된 기계적 물성과 더불어 전기 절연성을 증대시킬 수 있었다.

Keywords

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