Anodization of carbon fiber surfaces on mechanicalinterfacial properties of carbon fibers-reinforcedcomposites

摘要

In this work, the effect of anodic oxidation on surface characteristics of high strength PAN-based carbon fibers isinvestigated in terms of surface and mechanical interfacial properties of the composites. As a result, the acidity ofcarbon fiber surfaces is increased, due to the development of the oxygen functional groups in the presence of anodicoxidation. Also, the anodic oxidation leads to an increase in surface free energy of the carbon fibers, mainly due to theincrease of its specific component. It is found that the ILSS and KIC are improved in oxidized fibers-reinforcedcomposites, which can be attributed to the good wettability between fibers and epoxy resin matrix.