超高分子量聚乙烯纤维表面金属化改性及应用OA北大核心CSTPCD

Ultra-high molecular weight polyethylene(UHMWPE)fibers and fabrics suffer from weak interfacial bonding with composite matrix due to their chemically inert surface and high crystallinity,thereby affecting the performance of composite materials.In order to enhance the surface activity of UHMWPE fiber,we propose a method involving electroless deposition of copper metallization modification(UHMWPE-Cu)of UHMWPE fiber.We examine the effects of metal coating on the morphology,crystal structure,surface roughness and electrical conductivity of UHMWPE fibers.Additionally,we evaluate the interfacial bonding performance and puncture resistance of UHMWPE-Cu with polyurethane resin matrix.The results show that metallization enhances fiber conductivity,reaching up to 660.79 S/cm.Moreover,metallization increases the surface activity of the fiber,thereby improving the interfacial adhesion with the resin matrix.UHMWPE fiber-reinforced polyurethane composites exhibit a 108% increase in peeling strength compared with unmodified fiber samples.Furthermore,metallizied UHMWPE fibers significantly improve puncture resistance of the composites,showing a 35% improvement compared with unmodified samples.Metallization also greatly enhances the electromagnetic shielding performance of composite materials,achieving up to 53 dB,surpassing the qualified electromagnetic interference intensity value(20 dB)for shielding applications.Therefore,the surface metallization of UHMWPE fiber has a broad application prospect in electromagnetic shielding.