Polyacrylonitrile (PAN)-based carbon fibers (CFs) are widely used asreinforcements of advanced composites owing to their unique featuressuch as highest specific strength and modulus of all reinforcing fibers,strength-to-weight ratios, good temperature and chemical resistance,excellent electrical and thermal conductivity [1–6]. CF reinforced resinmatrix composites have been employed in different engineering applications. However, the interfacial bonding strength between CFs withoutsurface treatment and resin matrix is relatively low due to their chemical inertness and poor wettability, which results in fiber debondingor fiber pull out once composites are subject to loadings [7,8].