▎ 摘　　要

NOVELTY - Lanthanum oxide nano-particles modified mica reinforced polyphenylene sulfide-based high-strength heat radiation composite material comprises 2-3 pts. wt. graphene nanosheets, 0.2-0.3 pts. wt. zinc borate, 4-5 pts. wt. carbon nanofibers, 0.1-0.2 pts. wt. lanthanum oxide nanoparticles, 4-5 pts. wt. nano-mica, 0.1-0.2 pts. wt. methyl benzotriazole (BTA), 50-60 pts. wt. polyphenylene sulfide, 0.4-0.5 pts. wt. silane coupling agent, 1-2 pts. wt. calcium zinc stabilizing agent, 0.5-0.6 pts. wt. stearic acid, 8-10 pts. wt. ethanol and deionized water. USE - The composite material is useful for light-emitting diode (LED) (claimed), preferably LED packaging. ADVANTAGE - The composite material has good compatibility, reduced agglomeration phenomenon of granules, heat stability, uniformly dispersed molten macromolecular materials, strong adhesive force, effectively improved processing property, forms into guide sheet and fibrous structure when placed in a hot filler, good mechanical property, conductivity and large pole intensity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing composite material comprising (i) completely grinding and mixing lanthanum oxide nanoparticles, nano-mica and deionized water added into a high-energy mill for 40-50 minutes, drying ground material to remove moisture content, heating resulting composite powders under nitrogen atmosphere at a rate of 15-20 degrees C, and heating again to 750-800 degrees C, insulating, calcining for 1-1.5 hours, cooling to room temperature, mixing lanthanum oxide nanoparticles, mica powder, stearic acid and anhydrous ethanol, heating at 70-80 degrees C in a water bath, removing ethanol completely by drying, carrying out high speed mixing for 1.5-2 hours, grinding the resulting material, and crushing; (ii) adding step (i) material with polyphenylene sulfide placed in high-speed mixer, mixing uniformly in a twin-screw extruder, carrying out melt blending and granulating to obtain modified polyphenylene sulfide master batches; and (iii) uniformly mixing graphene nanosheets, nano-carbon fibers and silane coupling agent and uniformly mixing modified polyphenylene sulfide masterbatches and other remaining components in a high speed mixer, again extruding and pelletizing using twin-screw extruder.