Structure modification in carbon fibre under influence of pulse plasma

The modification process of the carbon fibres (CF), produced from the viscous thread in the argon and hydrogen pulse plasma, is studied. The single discharge energy of 10-4-10-5 s duration constituted from 25 up to 40 J. The CF was drawn through the discharge zone with the velocity, providing for the 5-6-multiple pulse discharge impact on the fibre surface unit. It is shown that the structural changes, occurring in the CF after the pulse plasma treatment, are connected with the graft of the strongly-polar functional (carboxyl and lactonic) groups on their surface. This is the cause of increasing the polar constituent of the CF surface energy. The increase in the CF surface energy leads to the increase in the adhesion strength with the binding matrix, which provides for the efficiency of their application for the composite materials production