Oxygen plasma modification of pitch-based isotropic carbon fibres

Abstract : An isotropic carbon fibre was surface-treated by microwave oxygen plasma at different conditions and characterised by scanning electron microscopy (SEM), scanning tunneling microscopy (STM), N2/CO2 adsorption, Raman spectrometry, X-ray photoelectron spectroscopy (XPS) and temperature-programmed desorption (TPD). It is shown that the structure of the fibre suffers only limited alterations upon plasma treatment in such a way that the local disorder on its surface, which was already large in the fresh material, barely increases after the plasma exposure, as detected by Raman measurements. At the nanometre scale, STM images revealed a moderate increase in surface roughness. Evidence for chemical changes undergone by the fibre following the etching was provided by XPS and TPD, showing that stable oxygen functionalities were introduced by the plasma exposure, a result of practical importance for the application of this treatment not only to this type of carbon fibre, but to carbon materials in general. It was also observed that very gentle plasma exposures were generally sufficient to provide the fibre surface with a large amount of oxygen functional groups and that more intense treatments had a negative effect in this respect (i.e. they were not able to supply oxygen to the surface in larger amounts than the softer treatments did).
Document type :
Journal articles
Complete list of metadatas

Cited literature [53 references]  Display  Hide  Download

https://hal-bioemco.ccsd.cnrs.fr/bioemco-00156931
Contributor : Jean-Paul Boudou <>
Submitted on : Sunday, June 24, 2007 - 4:33:35 PM
Last modification on : Thursday, March 21, 2019 - 1:02:42 PM
Long-term archiving on : Thursday, April 8, 2010 - 9:23:18 PM

File

BOUDOU-PAREDES.pdf
Files produced by the author(s)

Identifiers

Citation

Jean-Paul Boudou, J.I. Paredes, A. Cuesta, A. Martinez-Alonso, J.M.D. Tascon. Oxygen plasma modification of pitch-based isotropic carbon fibres. Carbon, Elsevier, 2003, 41, pp.41-56. ⟨10.1016/S0008-6223(02)00270-1⟩. ⟨bioemco-00156931⟩

Share

Metrics

Record views

841

Files downloads

881