▎ 摘　　要

NOVELTY - Wave-absorbing polyamide composite material comprises Fe3O4-graphene nano hybrid material is prepared by ferric chloride graphene sodium acetate and polyethylene glycol reaction the Fe3O4-multi-wall carbon nano-tube nano-composite material is prepared by ferric chloride acidified multi-wall carbon nano tube trisodium citrate sodium acetate and polyethylene glycol reaction the acidified multi-wall carbon nano-tube is prepared by multi-wall carbon nano-tube modified by concentrated nitric acid the double-graft ethylene and octene copolymer is prepared by amino-containing polar oligomer ethylene and octene copolymer grafted maleic anhydride and modified oxidation graphene the amino-containing polar oligomer is prepared by reacting hexamethylene diamine and epoxy chloropropane, the modified oxidation is graphene by the graphene oxide by 2 3-epoxy propyl trimethyl ammonium chloride organic modified preparation USE - Wave-absorbing polyamide composite material for electronic products such as TV, LED display screen, sound box, VCD machine, computer, digital camera, game machine, microwave oven, etc. ADVANTAGE - The wave-absorbing polyamide composite material has excellent mechanical property and wave absorbing performance. The electromagnetic wave leakage can be reduced below the national sanitation safety value, ensuring the health of human body. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for preparing wave-absorbing polyamide composite material, which involves: a. adding the vacuum-dried caprolactam into the stirring polymerization reactor, and adding Fe3O4-graphene nano-hybrid material, Fe3O4-multi-walled carbon nanotube nanocomposite material, double-grafted ethylene and octene copolymer, benzoic acid , main antioxidant, auxiliary antioxidant and an appropriate amount of water; then vacuumize for 3-7 minutes, pass nitrogen for 3-7 minutes, and cycle 4-8 times in this way, and control the system pressure in the stirring polymerization reactor to be 0.1-0.4MPa; b. adjusting the stirring speed of the stirring polymerization reactor to 30-50 r/minutes, and heat the stirring polymerization reactor to 220-224degrees Celsius in a closed and uniform speed within 2-4 hours. When the temperature of the polymerization reactor reaches 210 degreesC, the gas is released to 1.6 MPa, and the pressure is maintained at 1.6 MPa. After the reaction for 0.5 to 2.5 hours, the gas is released to normal pressure, and the temperature is raised to 230-240 degrees C at the same time at 230 degrees C. Continue the reaction for 0.5-2.5 hours at 240degreesC, continue to vacuumize at a constant temperature for 0.1-2 hours, the reaction is completed, and nitrogen is supplemented when discharging.