Electrochemical oxidation of carbon fibres

Surface chemistry and adhesion

J. Gulyás, E. Földes, A. Lázár, B. Pukánszky

Research output: Contribution to journalArticle

98 Citations (Scopus)

Abstract

PAN based carbon fibres were subjected to electrochemical oxidation under a wide variety of conditions. Sodium hydroxide, ammonium hydrogen carbonate, ammonium carbonate, sulphuric acid and nitric acid were used as electrolytes in four concentrations changing from 2 to 20 wt%. The applied voltage varied from 0.5 to 5 V in four steps. The surface chemistry of the fibres was studied by diffuse reflectance infrared spectroscopy (DRIFT). The strength of adhesion between the fibre and an epoxy matrix was characterized by the interfacial shear stress (IFSS), which was determined by fragmentation. The functional groups formed on the surface of the fibres depend very much on the type of the electrolyte used, while their number on its concentration, as well as on the voltage of oxidation. A close correlation was found between surface chemistry and fibre/matrix adhesion, the concentration of certain functional groups could be related quantitatively to IFSS. Some of the functional groups formed during oxidation could not be identified by the DRIFT technique used for analysis.

Original languageEnglish
Pages (from-to)353-360
Number of pages8
JournalComposites Part A: Applied Science and Manufacturing
Volume32
Issue number3-4
DOIs
Publication statusPublished - Mar 2001

Fingerprint

Electrochemical oxidation
Surface chemistry
Carbon fibers
Adhesion
Functional groups
Fibers
Electrolytes
Shear stress
Carbonates
Infrared spectroscopy
Ammonium hydroxide
Nitric Acid
Oxidation
Sodium Hydroxide
Electric potential
Nitric acid
Bicarbonates
Ammonium Compounds
Sodium
Hydrogen

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Electrochemical oxidation of carbon fibres : Surface chemistry and adhesion. / Gulyás, J.; Földes, E.; Lázár, A.; Pukánszky, B.

In: Composites Part A: Applied Science and Manufacturing, Vol. 32, No. 3-4, 03.2001, p. 353-360.

Research output: Contribution to journalArticle

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