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Modification of carbon fiber surfaces by electrochemical reduction of aryl diazonium salts: Application to carbon epoxy composites

✍ Scribed by M. Delamar; G. Désarmot; O. Fagebaume; R. Hitmi; J. Pinsonc; J.-M. Savéant

Book ID
104107071
Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
713 KB
Volume
35
Category
Article
ISSN
0008-6223

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✦ Synopsis

Electrochemical reduction of aryl diazonium salts on carbon fibers both in aprotic and in aqueous acidic solutions leads to the grafting of the aryl group on the carbon surfaces. In acidic medium the grafting of 4-nitrophenyl groups occurs simultaneously with the reduction to 4-aminophenyl groups which, in their turn, can react with the epoxy functions of epoxy resins. It is shown through a simple mechanical test that this process increases the adherence between the fiber and the matrix.

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In this study, pyridine, quinoline and phenanthroline molecules were covalently bonded to glassy carbon (GC) electrode surfaces for the first time using the diazonium modification method. Then, the complexation ability of the modified films with ruthenium metal cations was investigated. The derivati