The effect of γ-ray radiating carbon fiber on interfacial property of composite

In this paper, γ-ray radiation technique has been used to treat carbon fiber (CF); the effects of radiation on the interlaminar shear strength (ILSS) of CF reinforced composites and the bundle tensile strength of CF are studied. The chemical composition of CF surface and interfacial adhesion strength of composite is characterized by the methods of x-ray photoelectron spectroscopy (XPS), torsional braid analysis, interfacial microdebonding. The results show that radiation induces reaction between the surface of CF and the epoxy coating, the interfacial adhesion strength and ILSS of CFRP are improved, and the bundle tensile strength after radiation has not been changed.