▎ 摘　　要

NOVELTY - Flexible and attachable thermal management/electromagnetic shielding composite material comprises 5-20 %mass carbon-based material, 75-90 %mass phase change material, and 5-10 %mass micro-nano metal particle modified composite material composed of micro-nano metal particles, and an organic flexible material for packaging, where in the organic flexible material-encapsulated micro-nano metal particle modified composite material, the mass ratio of the organic flexible material acting on the surface encapsulation to the complex micro-nano metal particle modified composite material is 1:2, the carbon-based materials comprise graphene, carbon nanotubes and expanded graphite, the phase change material comprises paraffin, n-octadecane and silicate, and the micro-nano metal particles comprise copper or silver, the organic flexible material comprises silica gel and silicone resin. USE - As flexible and attachable thermal management/electromagnetic shielding composite material. ADVANTAGE - The flexible and attachable thermal management/electromagnetic shielding composite material absorbs the phase change material doped with micro-nano metal particles into the carbon-based material to prepare a stable micro-nano metal particle modified composite material, uses the energy storage characteristics of high phase change latent heat and high heat capacity of phase change materials to absorb heat, uses the high thermal conductivity and high electrical conductivity of copper, silver and other micro-nano metal particles, has excellent synergistic effect with carbon-based materials, so that the composite material has excellent thermal management performance and electromagnetic shielding performance, have excellent flexibility and deformability after phase change materials are transformed from solid to liquid, realizes the flexible and attachable function of the organic flexible material to encapsulate the micro-nano metal particle modified composite material, and completely solves the leakage problem of the phase change material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the flexible and attachable thermal management/electromagnetic shielding composite material comprising heating the phase change material in an oven at 80-100℃ for 1-2 hours, placing it in a heating environment at 80-100℃ to keep the liquid state of the phase change material, and at the same time, adding micro-nano metal particles to the liquid phase change material, and stirring for 1-2 hours, adding carbon-based material, stirring evenly for 2-3 hours, placing it into the mold and pressurize at 20-30 MPa, obtaining composite material modified by micro-nano metal particles, adding curing agent into the organic flexible material and stirring for 1-2 hours, leaving for 1-2 hours to remove foam, finally, placing the micro-nano metal particle modified composite material in the organic flexible material and soaking it for 0.5-1 hours, taking it out and leaving for 1-2 hours, the mass ratio of the organic flexible material acting on the surface encapsulation to the composite material is 1:2, and finally placing in an oven at 40-45℃ for curing for 5-8 hour to obtain the product.