| abstract |
The invention relates to a process for modifying the surface of carbonaceous materials by electrochemical reduction of diazonium salts, usable in particular for carbon fibers intended for the production of composite materials, and carbonaceous materials thus modified. According to this method, the carbonaceous material is used as a cathode (3) in an electrolysis cell containing a solution (2) of diazonium salt ArN2 X- in an aprotic solvent and by electrochemical reduction at an appropriate potential, the group is fixed. aromatic Ar on the carbonaceous material. It is thus possible to attach any aromatic group to the carbonaceous material, for example C6 H4 NO2, C6 H4 NH2, C6 H4 COOH, and then react it with appropriate compounds. |