Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Preparation and Characteristics of Polyimide Based Activated Carbon Fibers

폴리이미드 섬유를 이용한 활성탄소섬유 제조 및 특성분석

  • Jeong-Seo Park (Division of Polymer-Nano & Textile Engineering, Jeonbuk National University) ;
  • Hyun-Jae Cho (Division of Polymer-Nano & Textile Engineering, Jeonbuk National University) ;
  • Yong-Sik Chung (Division of Polymer-Nano & Textile Engineering, Jeonbuk National University)
  • 박정서 (전북대학교 고분자섬유나노공학부) ;
  • 조현재 (전북대학교 고분자섬유나노공학부) ;
  • 정용식 (전북대학교 고분자섬유나노공학부)
  • Received : 2024.01.18
  • Accepted : 2024.02.06
  • Published : 2024.02.29
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Abstract

The correlation between the imidization degree of polyimide fibers and characteristics of activated carbon fibers was studied. Poly(amic acid) solution was spun by dry-jet wet spinning method and poly(amic acid) fibers were transferred into polyimide fibers by heat treatment of IR heater at 300 ℃, 400 ℃, 500 ℃, 600 ℃. Polyimide fibers were carbonized and activated at 900 ℃. The imidization degree was investigated using FT-IR. The chemical structure was traced by FT-IR, elemental analyzer(EA) and x-ray diffraction(XRD). Thermal properties were analyzed with DSC and TGA. Mechanical properties were measured with single fiber tester(favimat). Specific surface area and pore characteristics were analyzed by BET method. The surface morphologies were observed by FE-SEM. The imidization degree of polyimide fibers increased up to 500 ℃ but decreased at 600 ℃. The thermal and mechanical properties of polyimide fiber exhibited a dependency on the imidization degree. The mechanical properties and compact morphologies of activated carbon fiber strongly depended on the imidization degree of polyimide fiber. Activated carbon fiber was showed the maximum tensile strength value of 898 MPa and specific surface area composed of micropores value of 920 ℃/g at IR heater temperature of 500 ℃ and the imidization degree of 96%.

Keywords

References

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