Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Analysis of Microstructural Changes in Polyacrylonitrile-Based Carbon Fibers Caused by Isothermal Oxidation in Air

XRD와 마이크로 라만 분석을 이용하여 700 ℃ 공기 중에서 등온 산화된 PAN계 탄소섬유의 미세구조 변화 해석

  • Lee, Sang-Hye (School of Materials Science and Engineering, Kumoh National Institute of Technology) ;
  • Oh, Seong-Moon (ILSAN Co., Ltd.) ;
  • Lee, Sang-Min (Advanced Material Research Center, Kumoh National Institute of Technology) ;
  • Roh, Jae-Seung (School of Materials Science and Engineering, Kumoh National Institute of Technology)
  • 이상혜 (금오공과대학교 신소재공학부) ;
  • 오성문 ((주)일산 기술연구소) ;
  • 이상민 (금오공과대학교 신소재연구소) ;
  • 노재승 (금오공과대학교 신소재공학부)
  • Received : 2021.01.07
  • Accepted : 2021.02.05
  • Published : 2021.02.28
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Abstract

In this study, isothermal oxidation reactions of polyacrylonitrile-based T300 and T700 carbon fibers were conducted in air at 700 ℃ by employing a horizontal tube furnace. The oxidized fibers were examined through XRD and micro-Raman analysis for quantitatively analyzing the changes in crystallinity occurring after the oxidation reactions. The results obtained from XRD analysis corroborate that the overall crystallinity of an oxidized fiber is lower than that of the corresponding raw fiber. Observation through a scanning electron microscope indicates that a longitudinal hollow pore is formed along the fiber axis of each oxidized fiber. Additionally, since the crystallinity of the fiber core is lower than that of the sheath, the conducted micro-Raman analysis suggests that the core became oxidized first to form the longitudinal hollow pore. In this study, it was difficult to measure the depth of the longitudinal hollow pore through the fiber core. In the future, if the depth of the hollow pore can be measured at the fiber core and is optimized for developing the hollow pore, new support materials, which serve as the carriers, can be designed.

Keywords

Acknowledgement

이 논문은 2018년도 정부(교육부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업임(No. 2018R1A6A1A03025761). 이 논문은 2020년도 정부(교육부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업임(No. 2020R1I1A1A01072407).

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