Effect of low processing rate on homogeneous microstructural evolution of polyacrylonitrile-based carbon fibers

Kim Doo-Won (김두원); Kim Dae Ho (김대호); Kim Sung Ryong (김성룡); KIM， BO HYE (김보혜); Bang Yun Hyuk (방윤혁); Yang Duck Joo (양덕주); Choi Go Bong (최고봉); Kim Yoong Ahm (김융암); Yang Kap Seung (양갑승)

doi:10.1007/s42823-019-00047-7

Effect of low processing rate on homogeneous microstructural evolution of polyacrylonitrile-based carbon fibers

Carbon Letters
Abbr : Carbon Lett.
2019, 29(5), pp.479~485
DOI : 10.1007/s42823-019-00047-7
Publisher : Korean Carbon Society
Research Area : Natural Science > Natural Science General > Other Natural Sciences General
Received : October 30, 2018
Accepted : May 21, 2019
Published : October 1, 2019

Kim Doo-Won ¹, Kim Dae Ho ², Kim Sung Ryong ², KIM， BO HYE ³, Bang Yun Hyuk ⁴, Yang Duck Joo ⁵, Choi Go Bong ⁶, Kim Yoong Ahm ⁶, Yang Kap Seung ⁶

¹한국과학기술연구원
²(주)효성
³대구대학교
⁴한국탄소융합기술원
⁵University of Texas at Dallas
⁶전남대학교

Accredited

ABSTRACT

This study demonstrates that low processing rate for producing polyacrylonitrile (PAN)-based carbon fiber is a critical to obtain a homogeneous radial microstructure with high resistance to oxidation, thereby resulting in their improved mechanical strength. The dry-jet wet spun PAN organic fibers were processed (e.g., stabilized and then carbonized) utilizing two different rates; one is 1.6 times longer than the other. The effect of processing rate on the microstructural evolutions of carbon fibers was analyzed by scanning electron microscopy after slow etching in air, as well as Raman mapping after graphitization. The rapidly processed fiber exhibited the multilayered radial structure, which is caused by the radial direction stretching of the extrusion in the spinning. In case of the slowly processed fiber, the layered radial structure formed in the spinning process was changed into a more homogeneous radial microstructure. The slowly processed fibers showed higher oxidation resistance, higher mechanical properties, and higher crystallinity than the rapidly processed one. Raman mapping confirmed that the microstructure developed during spinning was sustained even though fiber was thermally treated up to 2800 °C.

KEYWORDS

Carbon fibers Microstructure Mechanical properties Oxidation Polyacrylonitrile Carbonization

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Carbon Letters 2023 KCI Impact Factor : 1.35 KCI-WoS Impact Factor : 6.04

Effect of low processing rate on homogeneous microstructural evolution of polyacrylonitrile-based carbon fibers

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Citation status

This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2024-07-28)

Total Citation Counts(KCI+WOS) (5) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (6) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2025-01-01)

* References for papers published after 2023 are currently being built.

Carbon Letters 2023 KCI Impact Factor : 1.35 KCI-WoS Impact Factor : 6.04

Effect of low processing rate on homogeneous microstructural evolution of polyacrylonitrile-based carbon fibers

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WoS Citation Counts (5) This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2024-07-28)

Total Citation Counts(KCI+WOS) (5) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (6) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2025-01-01)

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This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2024-07-28)

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