Investigation on endurance of hydrophilic property of Carbon Fibers treated by air dielectric barrier discharge

Recently, thermo plastics such as Polypropylene (PP) or polyimide are going to be used as matrix resin of Carbon Fiber (CF) composite materials because they have an advantage to be rewelded at above 130 °C. However, mechanical strength of CF/PP composite materials is low because adhesion strength between CF surface and PP surface is low. Therefore, many researchers have investigated plasma surface modification to enhance the interfacial adhesion strength of CF surface 1 . On the other hand, from the industrial point of view, we need to investigate how long the effect of plasma surface modification lasts.