Investigations on the electrochemical surface treatment of carbon fibers

Desized polyacrylonitrile (PAN) based carbon fibers (CF) were chemically an d electrochemically oxidized and reduced. CF surfaces were activated via cy clic voltammetry studies with anodic and cathodic scans. The changes in CF surfaces were studied by contact angle measurements. Lifshitz-van der Waals and acid-base components of single fibers were determined. In general, oxi dation resulted in the formation of an acidic surface energy component and reduction gave rise to no change in the number of basic functionalities at the CF surface.