Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Fabrication and Properties of Polyimide-Based Graphite Fibers

폴리이미드계 흑연 섬유의 제조 및 특성

  • Kim, Nam-Kyu (Department of Carbon Materials Fiber Engineering, Chonbuk National University) ;
  • Kim, Woo-Sung (New Business Division, Dissol Inc.) ;
  • Jang, Han-Jin (New Business Division, Dissol Inc.) ;
  • Chung, Yong-Sik (Department of Carbon Materials Fiber Engineering, Chonbuk National University)
  • 김남규 (전북대학교 탄소소재파이버공학과) ;
  • 김우성 ((주)디쏠 신사업개발부) ;
  • 장한진 ((주)디쏠 신사업개발부) ;
  • 정용식 (전북대학교 탄소소재파이버공학과)
  • Received : 2019.09.22
  • Accepted : 2019.10.11
  • Published : 2019.10.31
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Abstract

Some polyimide(PI)-based carbon fibers and films have been reported, even with high precursor costs. PI, as a precursor, exhibited high carbon yield and extremely high thermal and electrical conductivities when carbonized and graphitized. PI fibers were prepared by the wet spinning of polyamic acid and subsequent thermal imidization. The fibers were carbonized in the presence of poly(dimethyl siloxane) (PDMS) and poly(methyl phenyl siloxane) (PMPS) and finally graphitized at $2,200^{\circ}C$. The addition of PDMS and PMPS altered the pyrolysis behavior and residue of the PI fibers. PDMS pretreatment improved the tensile strength and electrical conductivity of the resultant carbon fibers. Another important effect of PDMS was that the carbon fibers with PDMS were more flexible and much softer than the PI fibers.

Keywords

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