▎ 摘　　要

An octadecylamine functionalized graphene oxide (ODA-GO)/carbon nanotube (CNT)/polyethylene composite with a segregated and double-percolated structure was fabricated. In the composite, ODA-GO and CNT hybrids formed a well-developed conductive network in the high-density polyethylene (HDPE) matrix; and the highly conductive ODA-GO/CNT/HDPE component was localized at the interstitial space between ultrahigh molecular weight polyethylene (UHMWPE) granules. Structural examinations showed the formation of the segregated and double-percolated conductive network, as a result of an ultralow percolation threshold of similar to 0.06 vol.%. More interestingly, with the addition of a small content of ODA-GO/CNT/HDPE component, the maximal yield strength and tensile modulus of the composites reached 29.6 and 617 MPa, respectively; these corresponded to remarkable increases of 38.3 % and 13.8 % over the conventional segregated UHMWPE composites. The mechanical reinforcement was ascribed to the intensified interfacial adhesion between UHMWPE domains and cooperative effect of ODA-GO/CNT hybrids.