▎ 摘　　要

NOVELTY - Method for preparing high thermal conductivity titanium carbide compound (I)/graphene microchip/polylactic acid electromagnetic shielding composite material involves mixing lithium, concentrated hydrochloric acid and water to obtain a stripping liquid, mixing titanium aluminum carbide powder with the stripping liquid for first peeling, placing the obtained solid in water for secondary ultrasonic peeling to obtain the titanium carbide compound (I), making it into a compound (I) film, immersing it in a polylactic acid solution, drying to obtain a polylactic acid-coated titanium carbide compound (I) film, melt blending polylactic acid and graphene microchips to obtain a premix, extruding the premix to obtain filaments, carrying out FDM 3D printing to obtain a graphene flake/polylactic acid composite material, using the composite material as bottom and topmost layers, alternately laminating the compound (I) film coated with polylactic acid and the composite material, and pressing. USE - The method is useful for preparing high thermal conductivity titanium carbide (I)/graphene microchip/polylactic acid electromagnetic shielding composite material. ADVANTAGE - The composite material extends distance of electromagnetic wave, and improve the electromagnetic shielding performance. DETAILED DESCRIPTION - Method for preparing high thermal conductivity titanium carbide compound of formula: Ti3C2Tx (I)/graphene microchip/polylactic acid electromagnetic shielding composite material involves mixing lithium, concentrated hydrochloric acid and water to obtain a stripping liquid, mixing titanium aluminum carbide powder with the stripping liquid for first peeling, placing the obtained solid in water for secondary ultrasonic peeling to obtain the titanium carbide compound (I), making the compound (I) into a compound (I) film, immersing the film in a polylactic acid solution, drying the film to obtain a polylactic acid-coated titanium carbide compound (I) film, melt blending polylactic acid and graphene microchips to obtain a premix, extruding the premix to obtain filaments, FDM 3D printing the wire to obtain a graphene flake/polylactic acid composite material, using the graphene flake/polylactic acid composite material as the bottom layer and the topmost layer, alternately laminating the titanium carbide compound film coated with polylactic acid and the graphene flake/polylactic acid composite material, and pressing to obtain the product. An INDEPENDENT CLAIM is included for The high thermal conductivity titanium carbonate compound (I)/graphene microchip/polylactic acid electromagnetic shielding composite material comprising alternately stacked graphene microchips/polylactic acid electromagnetic shielding composite material layers and titanium carbonate compound (I) layer, where the graphene microchip/polylactic acid electromagnetic shielding composite material layer serves as the bottom and top layer of the material.