▎ 摘　　要

NOVELTY - Preparing composite wave absorbing material based on magnetic nanoparticles/graphene/carbon fiber comprises (i) preparing the graphene/carbon fiber by (ia) placing the carbon fiber into the acetone, and then ultrasonically cleaning and drying, (ib) placing the carbon fiber after the above treatment into the furnace cavity of the chemical vapor deposition equipment, vacuumizing in a sealed state, and then passing in hydrogen gas, (ic) heating and annealing the main reaction zone of the chemical vapor deposition device, (id) after the annealing treatment, heating up the main reaction zone of the chemical vapor deposition device, and introducing gas carbon source to prepare graphene on the surface of the carbon fiber, in this process, the radio frequency or microwave generator is in a working state, and the carbon-carbon bonds in the gas carbon source are broken and deposited on the surface of the carbon fiber to form graphene. USE - The method is useful for preparing composite wave absorbing material based on magnetic nanoparticles/graphene/carbon fiber. ADVANTAGE - The method: uniformly grows the graphene on the surface of carbon fibers; introduces magnetic nanoparticles into the gap between graphene to form a magnetic loss layer; and makes the composite material have both dielectric loss and magnetic loss, which is beneficial to achieve impedance matching by adjusting the electromagnetic parameters of the material. The absorbing material: is multi-dimensional, trans-scale composite material constructed from zero-dimensional, one-dimensional, and two-dimensional materials; adapts to the multi-dimensional absorption characteristics of electromagnetic waves; and improves the absorbing performance of the material. DETAILED DESCRIPTION - Preparing composite wave absorbing material based on magnetic nanoparticles/graphene/carbon fiber comprises (i) preparing the graphene/carbon fiber by (ia) placing the carbon fiber into the acetone, and then ultrasonically cleaning and drying, (ib) placing the carbon fiber after the above treatment into the furnace cavity of the chemical vapor deposition equipment, vacuumizing in a sealed state, and then passing in hydrogen gas, (ic) heating and annealing the main reaction zone of the chemical vapor deposition device, (id) after the annealing treatment, heating up the main reaction zone of the chemical vapor deposition device, and introducing gas carbon source to prepare graphene on the surface of the carbon fiber, in this process, the radio frequency or microwave generator is in a working state, and the carbon-carbon bonds in the gas carbon source are broken and deposited on the surface of the carbon fiber to form graphene, and (ie) after the reaction in the step (id), stopping heating, turning off the gas carbon source, and obtaining graphene/carbon fiber composite material after cooling, and (ii) preparing magnetic nanoparticle/graphene/carbon fiber composite wave absorbing agent by (iia) dissolving the compound of magnetic metal in deionized water to prepare a solution, (iib) taking the product graphene/carbon fiber composite material from the step (i) and placing it into the solution prepared in the step (iia), and stirring to make the mixture uniform, where the ratio of the mass (g) of the graphene/carbon fiber composite material to the volume (ml) of the solution is 1:20-1:100, (iic) depositing the oxide of the magnetic metal in the step (iia) on the graphene/carbon fiber composite material by wet chemical synthesis, and (iid) washing the product using deionized water to neutrality, and separating other products or unreacted raw materials and removing to obtain a magnetic nanoparticle/graphene/carbon fiber composite wave absorbing material. An INDEPENDENT CLAIM is also included for composite wave absorbing material based on magnetic nanoparticles/graphene/carbon fiber obtained by the above mentioned method.