Effects of sizing agents on the interface property of domestic carbon fiber composite

To investigate the influence of sizing agens and hygrothermal environments on micro-interface property of domestic 300 carbon fibers(A300-1, A300-2)/epoxy resin, a series of experiments were conducted. Interface property of sizing and desized carbon fiber systems under dry and hygrothermal environments was investigated by single fiber fragmentation test(SFFT). And the surface property of carbon fibers was analyzed by scanning electron microscope (SEM), atomic force microscope (AFM) and X-ray photoelectron spectroscopy (XPS). The results show that the grooves uniformly dispersed on the surface of both sizing and desized carbon fibers. Compared with desized carbon fibers, the surface roughness of A300-1 carbon fibers was almost unchanged, but it reduced with sizing agent 2. Both of the sizing agents reduced the oxygen functional groups of the carbon fiber surface. The micro-interface property of sizing carbon fibers/epoxy resin was proved better than desized carbon fiber systems under dry and hygrothermal environments.