X-ray photoelectron spectroscopic studies of carbon fiber surfaces. 11. Differences in the surface chemistry and bulk structure of different carbon fibers based on poly(acrylonitrile) and pitch and comparison with various graphite samples
- Kansas State Univ., Manhattan (USA)
X-ray photoelectron spectroscopy has been used to monitor the surface chemistry of untreated carbon fibers based on PAN and pitch, a pitch fiber anodically oxidized in 1 M HNO{sub 3}, and three different graphite materials. Differences were found in the core and valence-band region indicating a highly graphitic and almost unoxidized nature for untreated pitch-based fibers. X-ray powder diffraction was used to study the bulk structures of these materials, and the Du Pont E-120 pitch-based fiber was found to have the most graphitic structure of all the carbon fibers examined. The anodic oxidation of the pitch fiber changed both surface and bulk structure, producing mainly one type of oxygen-containing group on the surface.
- OSTI ID:
- 6949871
- Journal Information:
- Chemistry of Materials; (USA), Journal Name: Chemistry of Materials; (USA) Vol. 2:3; ISSN CMATE; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360602* -- Other Materials-- Structure & Phase Studies
CARBON FIBERS
COHERENT SCATTERING
COMPOSITE MATERIALS
DATA ANALYSIS
DIFFRACTION
ELECTRON SPECTROSCOPY
FIBERS
MATERIALS
MEASURING INSTRUMENTS
MEASURING METHODS
PHOTOELECTRON SPECTROSCOPY
SCATTERING
SPECTROSCOPY
SURFACE PROPERTIES
X-RAY DIFFRACTION