▎ 摘　　要

NOVELTY - Forming polymer composition having polyethylene matrix and uniformly distributed carbon nanomaterial and is in the form of polyolefin-carbon nanomaterial composite, by: mixing graphene nanoplatelets with low density polyethylene powder to form mixture, where 95 wt.% the particles of the low polyethylene powder have particle size of less than 500 mum; ball milling the mixture in high-energy shaker to form composite powder; press molding the composite powder to form composite plate; casting needle electrode (201) into the plate; and applying alternating current (AC) voltage of 1-50 kV to the plate via the needle electrode to form the polyolefin-carbon nanomaterial composite, in which the AC voltage is applied while the plate is disposed on supporting ground electrode (204) so that the needle electrode does not contact the ground electrode and the supporting ground electrode and the needle electrode are separated by distance of at least 30% of thickness of the plate. USE - The method is useful for forming polymer composition having polyethylene matrix and uniformly distributed carbon nanomaterial in form of polyolefin-carbon nanomaterial composite (claimed), whcih is used in batteries, solar cells, electrodes or electronics packaging. ADVANTAGE - The method provides the polymer composite: with improved electrical and thermal conductivity; and flexibility, toughness and degradation resistance. DETAILED DESCRIPTION - Forming polymer composition having polyethylene matrix and containing a uniformly distributed carbon nanomaterial where the polymer composition is in the form of polyolefin-carbon nanomaterial composite, involves: mixing graphene nanoplatelets with low density polyethylene powder to form mixture, where 95 wt.% the particles of the low polyethylene powder have a particle size of less than 500 mum; ball milling the mixture in high-energy shaker to form composite powder; press molding the composite powder to form composite plate; that the liquid adhesive does not shift in location once initial contact is made. casting needle electrode (201) into the plate; and applying an alternating current (AC) voltage of 1-50 kV to the plate through the needle electrode to form the polyolefin-carbon nanomaterial composite, where the AC voltage is applied while the plate is disposed on a supporting ground electrode so that the needle electrode does not contact the supporting and the ground electrode and the needle electrode are separated by a distance of at least 30% of a thickness of the plate. The ground electrode, the plate and the needle electrode are immersed in non-conductive liquid medium, the polyolefin-carbon nanomaterial composite has oriented electrically and thermally conductive pathways (202) that comprise dendritic conductive channels in the polyethylene matrix which terminate at and originate from at least one comprising an exterior surface of the polyolefin-carbon nanomaterial composite, a channel created by the needle electrode and a graphene nanoplatelet. DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of initiation of the oriented electrically conductive pathway at the site of the needle electrode under application high AC voltage. Needle electrode (201) Conductive pathway (202) Polyolefin matrix (203) Supporting ground electrode (204) Conducting channel (205)