▎ 摘　　要

NOVELTY - Fabricating three-dimensional (3D) printed portion with high through-plane thermal conductivity involves mixing 100 pts. wt. pure polymer particles with 2- 40 pts. wt. a carbon-based filler for a heat conduction to obtain a resulting mixture, milling the resulting mixture in a pan-type milling mechanochemical reactor, collecting a composite powder after the resulting mixture is milled, where the composite powder, the carbon-based filler is homogeneously dispersed in a polymer matrix, the pan-type milling mechanochemical reactor has parameter of 20-30 megapascal of a milling pressure. USE - Method for fabricating three-dimensional printed portion with high through-plane thermal conductivity. ADVANTAGE - The method can dissipate the heat produced by electronic devices through heat conduction, meet thermal conductivity requirements through 3D printing, which urgently needs to be broken through, and solves contradiction between the high thermal conductivity and the poor 3D printing processability of the material. DETAILED DESCRIPTION - Fabricating three-dimensional (3D) printed portion with high through-plane thermal conductivity involves mixing 100 pts. wt. pure polymer particles with 2- 40 pts. wt. a carbon-based filler for a heat conduction to obtain a resulting mixture, milling the resulting mixture in a pan-type milling mechanochemical reactor, collecting a composite powder after the resulting mixture is milled, where the composite powder, the carbon-based filler is homogeneously dispersed in a polymer matrix, the pan-type milling mechanochemical reactor has parameter of 20-30 megapascal of a milling pressure, 30-40℃ of a milling pan surface temperature controlled by introducing the constant-temperature circulating liquid medium, and 2-10 number of milling cycles, the pure polymer particle includes high-density polyethylene (PE) particles, low-density PE particles, and linear low-density PE particles, and the carbon-based filler for the heat conduction is one or a combination of two selected from the group consisting of graphene and carbon nanotubes (CNTs), performing an extrusion on the obtained composite powder to obtain 3D printing filaments, where the extrusion is conducted under the parameter of an extrusion temperature of 10-50° C. higher than a melting temperature of the pure polymer particles, and 10-50 revolutions per minute of an extrusion speed, using the 3D obtained printing filaments to fabricate the 3D printed part with the high through-plane thermal conductivity through a fused deposition modeling (FDM) 3D printing technology with specific 3D digital model required for the 3D printed portion with the high through-plane thermal conductivity, where the FDM 3D printing technology is conducted under parameters of 500-1,500 mm/min of a printing speed, and controlling the 3D printing filaments to be deposited layer by layer along a through-plane thermal conduction direction. An INDEPENDENT CLAIM is included for a 3D printed portion with a high through-plane thermal conductivity fabricated by the method