Strengthened PAN-based carbon fibers obtained by slow heating rate carbonization

Title
Strengthened PAN-based carbon fibers obtained by slow heating rate carbonization
Authors
김민아장다원Syogo TejimaRodolfo Cruz-Silva조한익김환철이성호Morinobu 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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