Strengthened PAN-based carbon
fibers obtained by slow heating rate
carbonization
- Title
- Strengthened PAN-based carbon
fibers obtained by slow heating rate
carbonization
- Authors
- 김민아; 장다원; Syogo Tejima; Rodolfo Cruz-Silva; 조한익; 김환철; 이성호; Morinobu Endo
- Keywords
- 탄소섬유; polyacrylonitrile; XPS; chemical structure; tensile strength
- Issue Date
- 2016-03
- Publisher
- Scientific Reports
- Citation
- VOL 6, 22988
- Abstract
- Large efforts have been made over the last 40 years to increase the mechanical strength of polyacrylonitrile (PAN)-based carbon fibers (CFs) using a variety of chemical or physical protocols. In this paper, we report a new method to increase CFs mechanical strength using a slow heating rate during the carbonization process. This new approach increases both the carbon sp3 bonding and the number of nitrogen atoms with quaternary bonding in the hexagonal carbon network. Theoretical calculations support a crosslinking model promoted by the interstitial carbon atoms located in the graphitic interlayer spaces. The improvement in mechanical performance by a controlled crosslinking between the carbon hexagonal layers of the PAN based CFs is a new concept that can contribute further in the tailoring of CFs performance based on the understanding of their microstructure down to the atomic scale.
- URI
- http://pubs.kist.re.kr/handle/201004/58719
- ISSN
- 20452322
- Appears in Collections:
- KIST Publication > Article
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