The surface treatment of C-type isotropic pitch-based carbon fiber was carried out by anodic oxidation in 5 wt% NH4NO3 electrolyte. The changes of fiber surface and carbon fiber/ABS resin composites were characterized by SEM, XPS and mechanical properties test. The oxygen functional groups on the surface, such as hydroxyl (-C-OH), carboxyl (-COOH) groups etc., increased after oxidation. Tensile strength, flexural strength and modulus of carbon fiber/ABS composites were also enhanced. However, the impact strength decreased with the improvement of the surface adhesion between CF and matrix.

• Xiao Ping Yang(Institute of Carbon Fiber and Composites, Beijing University of Chemical Technology)
• Cheng Zhong Wang(Institute of Carbon Fiber and Composites, Beijing University of Chemical Technology)
• Yun Hua Yu(Institute of Carbon Fiber and Composites, Beijing University of Chemical Technology)
• Seung-Kon Ryu(Dept. of Chem. Eng., Chungnam National Univ.)