Investigating nanostructures in carbon fibres using Raman spectroscopy

Haruki Okuda, Robert Young, Daniel Wolverson, Fumihiko Tanaka, Go Yamamoto, Tomonaga Okabe

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Nanostructures in the PAN-based carbon fibres were investigated by means of the Raman spectroscopy which was performed using a series of different excitation wavelengths. UV-Raman measurements showed the predominance of sp2 carbon for the carbon fibres with Young’s moduli ranging from 55 to 440 GPa. The excitation wavelength dependence of the spectral line shape implied the presence of the graphitic (sp2 carbon layers) as well as the amorphous carbon-like component (sp2 carbon clusters) in these fibres. An analytical model
based upon the Tuinstra-Koenig relation and the rule-of-mixtures concept was proposed to account for the observed behaviour of the peak intensity ratio ID/IG. It was suggested that the carbonisation heat treatment led to the sp2 carbon layers extending rapidly throughout the nanostructure, resulting in the complete loss of the sp2 carbon clusters for the higher-modulus carbon fibres. These new findings together with the proposed analytical model are believed to be essential keys towards the development of new generation carbon fibres.
LanguageEnglish
Pages178-184
JournalCarbon
Volume130
Early online date28 Dec 2017
DOIs
StatusPublished - 1 Apr 2018

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Raman spectroscopy
Nanostructures
Carbon clusters
Carbon
Analytical models
Wavelength
Amorphous carbon
Carbonization
Elastic moduli
Heat treatment
carbon fiber
Fibers

Cite this

Investigating nanostructures in carbon fibres using Raman spectroscopy. / Okuda, Haruki; Young, Robert; Wolverson, Daniel; Tanaka, Fumihiko; Yamamoto, Go ; Okabe, Tomonaga.

In: Carbon, Vol. 130, 01.04.2018, p. 178-184.

Research output: Contribution to journalArticle

Okuda, Haruki ; Young, Robert ; Wolverson, Daniel ; Tanaka, Fumihiko ; Yamamoto, Go ; Okabe, Tomonaga. / Investigating nanostructures in carbon fibres using Raman spectroscopy. In: Carbon. 2018 ; Vol. 130. pp. 178-184.
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