▎ 摘　　要

NOVELTY - Polymer composite material comprises 1-1.5 wt.% graphene, 15-20 wt.% boron oxide, 25-50 wt.% barium sulfate, 20-55 wt.% nylon, 2-3 wt.% anti-precipitation agent and 1 wt.% antioxidant. USE - Polymer composite material. ADVANTAGE - The polymer composite material has long service life and reduces energy-consumption. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the preparation of polymer composite material comprising mixing boron oxide, graphene and nylon, stirring at 500 revolutions/minute for 2 hours, adding barium sulfate and anti-precipitation agent at 5000 rpm for 24 hours, filtering, milling, crushing 6 times at 50 degrees C, centrifuging, spin-drying at 2500 rpm, discharging, filtering, placing in automatic spray gun, spraying on heat sink with thickness for 20-50 mu m, curing and drying.