Influence of Plasma-Induced Epoxy Coatings on the Interfacial Properties of Twaron/Epoxy Composites

摘要

This work deals with the oxygen-plasma-induced epoxy resin coating process on the surface of Twaron fiber in order to get a strong interfacial adhesion between the fibers and epoxy matrices. The influence of oxygen plasma treatment time on the surface morphologies and free energies of Twaron fibers and the interlaminar shear strength (ILSS), water absorption and fracture mechanisms of the composite were investigated. Surface chemical properties were studied by diffuse reflectance fourier transform infrared spectroscopy (FTIR). The fiber surface morphologies and wettability were analyzed by atomic force microscope (AFM) and dynamic contact angle analysis (DCAA), respectively. The interfacial adhesion performance of the Twaron fiber-reinforced epoxy composite was measured by ILSS and water absorption tests. The fracture mechanisms of composites were examined by scanning electron microscope (SEM).