▎ 摘　　要

NOVELTY - The method comprises (a) uniformly coating catalyst on carbon fiber cloth, introducing carbon source gas to react for 2-4 hours, (b) preparing phosphate-loaded graphene material, (c) adding the solution of step (b) and chopped carbon fiber with length of 1-3mm into epoxy resin adhesive, coating the mixed adhesive on the carbon fiber cloth surface of the deposited carbon nanotube, after drying, re-coating the mixed adhesive for 1-3 times, (d) arranging the dried carbon fiber in the carbonization furnace and carbonizing, (e) repearing steps (c) to (d) for 3-5 times to obtain the densified preform, (f) heating under argon gas atmosphere at a rate of 300-350degrees Celsius/hour to 1000degrees Celsius, then according to the speed of 300-350degrees Celsiushour respectively at temperature to 2500degrees Celsius, keeping the temperature for 0.5-1 hour, obtaining the carbon-carbon composite material for depositing carbon nanotube. USE - Preparation method of carbon-carbon composite material for depositing carbon nano-tube used as ablation material and heat structure material in aerospace and aerospace technology field. ADVANTAGE - The carbon-carbon composite material is embedded with chopped carbon fiber in the carbon base and carbon fiber, and depositing carbon nano-tube between the carbon fiber and carbon base, thus improving the mechanical property of the composite material, and improving the oxidation resistance of the material. The phosphate is loaded on the graphene consistent with the substrate performance, thus hardly influencing the material's mechanical property. DETAILED DESCRIPTION - The method comprises (a) uniformly coating catalyst on carbon fiber cloth, arranging the carbon fiber in tubular electric furnace, introducing nitrogen to heat to 700-800degrees Celsius, then introducing carbon source gas to react for 2-4 hours, cooling to room temperature to obtain the carbon fiber cloth of carbon nanotube deposition, (b) taking lithium salt, metal salt or metal oxide, phosphate or phosphoric acid, dissolving in water, adding graphene oxide and citric acid, uniformly mixing, stirring at 40-80degrees Celsius, reacting for 1-2 hours, obtaining sol, using sol-gel method under the condition of ultrasonic stirring, removing water at 60-80degrees Celsius, drying to obtain phosphate-graphene gel precursor, grinding, heat treating at 400-800degrees Celsius for 5-10 hours in a tubular furnace filled with nitrogen atmosphere. dispersingobtained phosphate-loaded graphene material in pyrene solution or pyrene derivative solution by ultrasonic stirring, (c) adding the solution of step (b) and chopped carbon fiber with length of 1-3mm into the epoxy resin adhesive, uniformly stirring to obtain the mixed adhesive, coating the mixed adhesive on the carbon fiber cloth surface of the deposited carbon nanotube, after drying, re-coating the mixed adhesive for 1-3 times, (d) arranging the dried carbon fiber in the carbonization furnace and carbonizing, (e) repearing steps (c) to (d) for 3-5 times to obtain the densified preform, (f) heating under argon gas atmosphere at a rate of 300-350degrees Celsius/hour to 1000degrees Celsius, then according to the speed of 300-350degrees Celsiushour respectively at temperature to 2500degrees Celsius, keeping the temperature for 0.5-1 hour, obtaining the carbon-carbon composite material for depositing carbon nanotube.