▎ 摘　　要

NOVELTY - Method for producing a polyethylene/graphene composite, involves forming a mixture of graphene nanoplatelets and a low density polyethylene powder having a particle size of less than 500 microm, forming a composite powder by ball milling the mixture in a high-energy shaker, forming a composite plate by press molding the composite powder, placing a source electrode into the composite plate, and applying an alternating current (AC) voltage of 1-50 kV to the composite plate through the source electrode to form the polyethylene/graphene composite, where the AC voltage is applied while the composite plate is arranged on a supporting ground electrode such that the source electrode does not contact the supporting ground electrode and the supporting ground electrode, the composite plate, and the source electrode are immersed in a non-conductive liquid medium. USE - The method is used for producing a polyethylene/graphene composite, which is used in electronics applications, such as batteries, solar cells, electrodes, or electronics packaging. ADVANTAGE - The method ensures electrical and thermal conductivity higher than the parent polyolefin by the incorporation of a carbon nanomaterial, and provides a nanocomposite material having electrically conductive pathways formed from application of AC voltage. DETAILED DESCRIPTION - Method for producing a polyethylene/graphene composite involves forming a mixture of graphene nanoplatelets and a low density polyethylene powder having a particle size of less than 500 microm, forming a composite powder by ball milling the mixture in a high-energy shaker, forming a composite plate by press molding the composite powder, placing a source electrode into the composite plate, and applying an alternating current (AC) voltage of 1-50 kV to the composite plate through the source electrode to form the polyethylene/graphene composite, where the AC voltage is applied while the composite plate is arranged on a supporting ground electrode such that the source electrode does not contact the supporting ground electrode and the supporting ground electrode, the composite plate, and the source electrode are immersed in a non-conductive liquid medium, and the polyolefin-carbon nanomaterial composite has oriented electrically and thermally conductive pathways that comprise dendritic conductive channels in the polyethylene matrix which terminate at and originate from at least one of an exterior surface of the polyolefin-carbon nanomaterial composite, a channel created by the needle electrode, and a graphene nanoplatelet.