Molecular Interaction at the Composites Interface between Surface-Treated Carbon Fibre and Polymer Matrices

摘要

Carbonf ibres with different degrees of surface oxidation, and as received fibres, were used to prepare epoxy composites in order to compare the effects of the fiber surface chemistry on the interfacial properties. ESCA and contact angle examination were applied to characterize the carbon fiber surfaces. A correlation has been found between oxygen containing groups on their surfaces and interlaminar shear strength (ILSS) of the composites. Higher values of ILSS obtained for the oxidized fibres containing composites are proposed to be due to the higher concentration of carboxylic groups created on the oxidized fibre surface and to the creation of chemical bonds at the fiber/epoxy matrix interface.