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Korean Carbon Society (한국탄소학회)
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Preparation and characterization of isotropic pitch-based carbon fiber

  • Zhu, Jiadeng (Carbon Convergence Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology) ;
  • Park, Sang Wook (Chemical and Polymer Laboratory, GS Caltex R&D Center) ;
  • Joh, Han-Ik (Carbon Convergence Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology) ;
  • Kim, Hwan Chul (Department of Organic Materials and Fiber Engineering, Chonbuk National University) ;
  • Lee, Sungho (Carbon Convergence Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology)
  • Received : 2013.03.10
  • Accepted : 2013.04.05
  • Published : 2013.04.30
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Abstract

Isotropic pitch fibers were stabilized and carbonized for preparing carbon fibers. To optimize the duration and temperature during the stabilization process, a thermogravimetric analysis was conducted. Stabilized fibers were carbonized at 1000, 1500, and $2000^{\circ}C$ in a furnace under a nitrogen atmosphere. An elemental analysis confirmed that the carbon content increased with an increase in the carbonization temperature. Although short graphitic-like layers were observed with carbon fibers heat-treated at 1500 and $2000^{\circ}C$, Raman spectroscopy and X-ray diffraction revealed no significant effect of the carbonization temperature on the crystalline structure of the carbon fibers, indicating the limit of developing an ordered structure of isotropic pitch-based carbon fibers. The electrical conductivity of the carbonized fiber reached $3.9{\times}10^4$ S/m with the carbonization temperature increasing to $2000^{\circ}C$ using a four-point method.

Keywords

References

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