Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
권호 표지

Influence of Oxy-fluorination of Carbon Fibers on Mechanical Interfacial and Crack Resistance Properties of Epoxy Matrix Composites

산소-불소 처리된 탄소섬유가 에폭시 매트릭스 복합재료의 기계적 계면특성과 크랙저항 특성에 미치는 영향

  • Park Soo-Jin (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Oh Jin-Seok (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Seo Min-Kang (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Han Mijeong (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Kim Hak-Yong (Department of Textile Engineering, Chonbuk National University)
  • 박수진 (한국화학연구원 화학소재연구부) ;
  • 오진석 (한국화학연구원 화학소재연구부) ;
  • 서민강 (한국화학연구원 화학소재연구부) ;
  • 한미정 (한국화학연구원 화학소재연구부) ;
  • 김학용 (전북대학교 섬유공학과)
  • Published : 2005.06.01
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Abstract

In this work, the effect of oxy-fluorination on surface characteristics of carbon fibers was investigated in terms of fracture toughness and crack resistance properties of the epoxy matrix composites. The surface properties of the carbon fibers were determined by acid-base values, X-ray photoelectron spectroscopy (XPS), and FT-IR measurements. And their fracture toughness of the composites were evaluated by the interlaminar shear strength (ILSS) and critical stress intensity factor $(K_{lc})$. Crack resistance of the composites was investigated using two types of testing methods, namely critical energy release rate mode I $(G_{lc})$ and mode II $(G_{llc}).\;O_{ls}/C_{ls}\;and\;(O_{ls}+F_{ls})/C_{ls}$ ratio from XPS were increased by oxy-fluorination, due to the oxygen containing functional groups and the formation of $C-F_{x}$ bonds on the carbon fiber surface. It was found that the fracture toughness and crack resistance of the composites had been improved by the oxy-fluorination, which could probably be attributed to the increase in the degree of adhesion at interfaces between the carbon fibers and epoxy resin matrix in the present composite system.

Keywords

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