Aramid fiber with excellent interfacial properties suitable for resin composite in a wide polarity range

The weak interfacial adhesion of aramid fiber with resin matrix is believed as a major limitation for its wide application. In this study, a nondestructive grafting method was applied for surface modification of benzimidazole-contained aramid fiber. Using the NH in benzimidazole unit as active sites, aramid fiber surface was firstly decorated with densely SiO2 structure, and a rough surface was obtained. Then, high density of NH2 and C=C groups...