Preparation method of heat-conducting, electricity-conducting and electromagnetic-shielding multifunctional composite material

[0025] Provide a kind of preparation method of the multi-functional composite material with thermal conduction and electric conduction electromagnetic shielding among the embodiment one, adopt the following steps according to each component of parts by weight:

[0026] S1: Add 38 parts of copper powder, 22 parts of nano-silicon carbide, 17 parts of carbon black, 20 parts of nano-ferrite base and 30 parts of graphene into a high-speed mixer for high-speed stirring. Dry in an inert gas oven for 2 hours;

[0027] S2: Add the above-mentioned dried materials, 6 parts of zinc chloride whiskers, 14 parts of nano-metallic nickel and polymer materials into a high-speed mixer for high-speed stirring, and then put them into an oven filled with inert gas to dry for 1 hour;

[0028] The polymer material includes: 22 parts of nylon-66, 13 parts of poly-4-methyl-1-pentene and 7 parts of polyvinylidene chloride;

[0029] S3: Add the material obtained in S2 into a high-speed co-rotating intermes

[0031] Embodiment 2 provides a kind of preparation method of the multifunctional composite material with heat conduction and conduction electromagnetic shielding, each component adopts the following steps by weight:

[0032] S1: Add 30 parts of copper powder, 18 parts of nano-silicon carbide, 15 parts of carbon black, 16 parts of nano-ferrite base and 28 parts of graphene into a high-speed mixer for high-speed stirring, mix the materials evenly and put Dry in an oven filled with inert gas for 1 hour;

[0033] S2: Add the above-mentioned dried materials, 4 parts of zinc chloride whiskers, 10 parts of nano-metallic nickel and polymer materials into a high-speed mixer for high-speed stirring, and then put them into an oven filled with inert gas to dry for 1 hour;

[0034] The polymer material includes: 18 parts of nylon-66, 10 parts of poly-4-methyl-1-pentene and 5 parts of polyvinylidene chloride;

[0035] S3: Add the material obtained in S2 to a high-speed co-rotating intermeshin

[0037] Embodiment 3 provides a kind of preparation method of the multifunctional composite material with heat conduction and conduction electromagnetic shielding, each component adopts the following steps by weight:

[0038] S1: Add 45 parts of copper powder, 24 parts of nano-silicon carbide, 19 parts of carbon black, 23 parts of nano-ferrite base and 34 parts of graphene into a high-speed mixer for high-speed stirring. Dry in an inert gas oven for 3 hours;

[0039] S2: Add the above-mentioned dried materials, 8 parts of zinc chloride whiskers, 18 parts of nano-metallic nickel and polymer materials into a high-speed mixer for high-speed stirring, and then put them into an oven filled with inert gas to dry for 1 hour;

[0040] The polymer material includes: 26 parts of nylon-66, 16 parts of poly-4-methyl-1-pentene and 8 parts of polyvinylidene chloride;

[0041] S3: Add the material obtained in S2 to a high-speed co-rotating intermeshing twin-screw extruder for extrusion granulat