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S. Neffe, L. Zaskórski

The effects of electrochemical oxidation of carbon fibre surface on the mechanical properties of carbon-fibre composite

Polimery 1989, No 9, 402

DOI: dx.doi.org/10.14314/polimery.1989.402


High-strength carbon fibres prepared by oxidation and carbonization of polyacrylonitrile fibres have been oxidized electrochemically in a 10 percent solution of ammonium hydrogen carbonate. It has been found that such treatment improves the mechanical strength properties of carbon fibres and increases by several ten percent the interlaminar shear strength (τxy) of carbon-epoxide composite with such fibres. The effect of temperature on τxy of carbon fibre-epoxide composite has been investigated and compared with analogous results for glass-fibre reinforced epoxide composite. In the whole investigated temperature range of 293—413 К the value of τxy of carbon fibre-epoxide composites has been twice as high as that of glass fibre-epoxide composite. The strength properties determinations have been supplemented with morphological studies (electron microscopy) to explain the mechanism of composite destruction and with thermal analysis of oxidized carbon fibres and carbon fibre-epoxide composite.

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