Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Effects of Electrochemical Oxidation of Carbon Fibers on Mechanical Interfacial Properties of Carbon Fibers-reinforced Polarized-Polypropylene Matrix Composites

전기화학적 산화처리가 탄소섬유/극성화된 폴리프로필렌 복합재의 기계적 계면 특성에 미치는 영향

  • Kim, Hyun-Il (Korea Institute of Carbon Convergence Technology, R&D Division) ;
  • Choi, Woong-Ki (Korea Institute of Carbon Convergence Technology, R&D Division) ;
  • Oh, Sang-Yub (Korea Institute of Carbon Convergence Technology, R&D Division) ;
  • An, Kay-Hyeok (Korea Institute of Carbon Convergence Technology, R&D Division) ;
  • Kim, Byung-Joo (Korea Institute of Carbon Convergence Technology, R&D Division)
  • 김현일 (한국탄소융합기술원 연구개발본부) ;
  • 최웅기 (한국탄소융합기술원 연구개발본부) ;
  • 오상엽 (한국탄소융합기술원 연구개발본부) ;
  • 안계혁 (한국탄소융합기술원 연구개발본부) ;
  • 김병주 (한국탄소융합기술원 연구개발본부)
  • Published : 2013.10.31
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Abstract

In this work, the effects of electrochemical oxidation of carbon fiber surfaces on mechanical interfacial properties of carbon fibers-reinforced polarized-polypropylene matrix composites were studied with various current densities during the treatments. Surface properties of the fibers before and after treatments were observed by SEM, AFM, XPS, and contact angle measurements. Mechanical interfacial properties of the composites were measured in terms of critical stress intensity factor ($K_{IC}$). From the results it was found that $O_{1s}$ peaks of the fiber surfaces were strengthened after electrochemical oxidation which led to the enhancement of surface free energy of the fiber, resulting in good mechanical performance of the composites. It can be concluded that electrochemical oxidation of the carbon fiber surfaces can control the interfacial adhesion between the carbon fibers and polarized-polypropylene in this composites system.

본 연구에서는 탄소섬유 표면에 가해진 전기화학적 산화처리가 탄소섬유강화 극성화된 폴리프로필렌 기지 복합재료의 기계적 계면 물성에 미치는 영향을 알아보기 위해 전류밀도 변수에 따른 섬유표면의 변화를 관찰하였다. 표면처리 전후의 탄소섬유 표면특성은 주사전자현미경과 원자현미경, 적외선분광법, X선광전자분광법과 접촉각으로 분석하였다. 탄소섬유강화복합재의 기계적 계면특성은 임계응력세기인자를 측정하여 평가하였다. 실험 결과 전기화학적 산화처리 후 섬유 표면의 $O_{1s}$ 피크의 증가를 관찰할 수 있었고, 이는 섬유의 표면자유에너지의 증가를 유도하며, 탄소섬유와 폴리프로필렌의 계면 결합력이 증가된 것으로 판단된다. 결론적으로 탄소섬유강화복합재료의 기계적 물성은 탄소섬유와 극성 폴리프로필렌 기지와의 계면 강도조절을 통해 가능할 것으로 판단된다.

Keywords

References

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