▎ 摘　　要

NOVELTY - Preparing graphene heat-dissipating master batch involves using metal foam microspheres, and then adding the metal foam microspheres to the high-speed airflow impact composite device, dispersing completely in the form of mist in the atomization chamber to obtain metal foam. The high-speed air flow of the metal foam dispersed is impacted, and the laser is instantaneously heated to melt the surface of the metal foam. The graphene powder is added to the metal foam whose surface is melted, and started the rotor to rotate at high speed to generate high-speed airflow, which drives the input graphene powder to adhere to the surface of the metal foam to obtain graphene-metal foam composite thermal conductive microspheres with high sphericity and uniform graphene bonding. USE - Method for preparing graphene heat-dissipating masterbatch for light emitting diode lamp heat dissipation. ADVANTAGE - The method enables to prepare graphene heat-dissipating masterbatch that has good thermal conductivity and high heatconduction performance, and in cost effective manner. DETAILED DESCRIPTION - Preparing graphene heat-dissipating masterbatch involves using metal foam microspheres, and then adding the metal foam microspheres to the high-speed airflow impact composite device, dispersing completely in the form of mist in the atomization chamber to obtain metal foam. The high-speed air flow of the metal foam dispersed is impacted, and the laser is instantaneously heated to melt the surface of the metal foam. The graphene powder is added to the metal foam whose surface is melted, and started the rotor to rotate at high speed to generate high-speed airflow, which drives the input graphene powder to adhere to the surface of the metal foam to obtain graphene-metal foam composite thermal conductive microspheres with high sphericity and uniform graphene bonding. The graphene-metal foam composite thermally conductive microspheres are mixed with a coupling agent and a lubricant in a high-speed mixer, and then polypropylene carrier resin is added to stir to obtain mixed precursor materials. The mixed precursor material is extruded and granulated by a twin-screw extruder to obtain a graphene composite masterbatch for high thermal conductivity LED heat dissipation lamps.