method for modifying the surface of kohlenstoffmaterialien by electrochemical reduction of diazoniumsalzen especially for the manufacture of composite materials, and in this way, modified kohlenstoffmaterialien.

摘要

Process for modyfying the surface of carbon-containing materials by electrochemical reduction of diazonium salts, applicable in particular to carbon fibres for composite materials, and carbon-containing materials so modified. According to the process, the carbon-containing material is used as a cathode (3) in an electrolysis unit containing a diazonium salt solution ArN2?x?- (2) in an aprotic solvent and by electrochemical reduction to a suitable potential, the aromatic group (Ar) is bound to the carbon-containing material. Any aromatic group can be bound in this way to the carbon-containing material, for instance C6?H4?NO2?, C6?H4?NH2?, C6?H4?COOH, and then reacted with suitable compounds.