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Carbon fibers are usually used for reinforcement of various polymers due to its high specific strength among other properties. Very little has however been reported on the reinforcement of PP with carbon fibre for the purposes of enhancement of wear resistance. In one study, surface treatment of the carbon fiber was deemed important for its dispersion in PP and improvement of interfacial adhesion. The carbon fiber was treated with dielectric barrier discharges (DBD) in ambient air to improve its surface activity. The wear rate and coefficient of friction of the polypropylene filled with DBD-treated carbon fiber were lower than those of untreated carbon fiber composite. This was attributed to the better interfacial adhesion as a result of the surface treatment of carbon fiber.