Effect of Irradiation Grafting Epoxy on Surface Characteristics of Carbon Fibers and Mechanical Properties of Composites

【摘要】 Co60 γ-ray irradiation as a novel method for modification of fiber surface was introduced in the present study. Carbon fibers with kidney-type section were treated in a solution of epoxy resin and acetone using γ-ray irradiation. The effect of irradiation grafting epoxy on characteristics of carbon fibers was analyzed by using atomic microscopy (AFM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and impregnation performance testing. It is reveals that the fiber surface is roughened, the O/C ratio and C-O-C percentage increase rapidly and the wetting ability of fibers also improves after irradiation grafting. In addition, irradiation grafting is found to improve the adhesion at fiber/matrix interface and enhance the flexural and tensile strength of carbon fiber/phenolic composites with increasing the strength and modulus of fibers.更多还原

【Abstract】 Co60 γ-ray irradiation as a novel method for modification of fiber surface was introduced in the present study. Carbon fibers with kidney-type section were treated in a solution of epoxy resin and acetone using γ-ray irradiation. The effect of irradiation grafting epoxy on characteristics of carbon fibers was analyzed by using atomic microscopy (AFM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and impregnation performance testing. It is reveals that the fiber surface is roughened, the O/C ratio and C-O-C percentage increase rapidly and the wetting ability of fibers also improves after irradiation grafting. In addition, irradiation grafting is found to improve the adhesion at fiber/matrix interface and enhance the flexural and tensile strength of carbon fiber/phenolic composites with increasing the strength and modulus of fibers.更多还原