▎ 摘　　要

NOVELTY - Preparing three-dimensional structure carbon nanotube and graphene composite CPU heat dissipation material comprises (1) taking concentrated sulfuric acid, activated carbon powder, multi-walled carbon nanotubes and potassium permanganate, (2) equipping with an ice bath, mixing concentrated sulfuric acid, activated carbon powder, immersing to obtain a low temperature pre-reaction tank and reaction product A, (3) preparing warm water bath composed of warm water, immersing the glass container containing the reaction product A into the warm water bath to obtain a medium temperature reaction pool, (4) preparing high-temperature bath composed of water with a constant water, immersing, isolating to obtain a glass container containing the reaction product C and (5) material separating into a glass container containing reaction product C to obtain a product dispersion, dispersing, spraying, using it after natural drying, treating the dried dispersion obtain a CPU heat dissipation structure. USE - The method is useful for preparing three-dimensional structure carbon nanotube and graphene composite CPU heat dissipation material. ADVANTAGE - The method: does not need to replace the existing heat dissipation material, can improve the overall heat dissipation efficiency, is anti-aging and hydrophobic. DETAILED DESCRIPTION - Preparing three-dimensional structure carbon nanotube and graphene composite CPU heat dissipation material comprises (1) raw material preparation by taking 135-140 pts. wt. concentrated sulfuric acid, 6 -8 pts. wt. activated carbon powder, 1.7-1.9 pts. wt. multi-walled carbon nanotubes and 16-17 pts. wt. potassium permanganate, (2) equipping with an ice bath composed of ice-water mixture, mixing the concentrated sulfuric acid, activated carbon powder, multi-walled carbon nanotubes with 800-900 pts. wt. deionized water and loading them into glass, immersing the container in the ice bath, keeping the solution inside and outside the container isolated and mechanically stirring for 2.5-3 hours at a stirring rate of 30-35 revolutions per minute/min to obtain a low temperature pre-reaction tank, adding prepared potassium permanganate slowly and uniformly at a rate of 5%/minute based on its total weight, stirring the obtained low-temperature pre-reaction tank continuously at a stirring rate of 15 -20 revolutions per minute/minute after the completion of the input for 90-100 minutes to obtain low-temperature reaction solution, taking the glass container out of the ice bath and the low-temperature reaction phase ends to obtain a glass container containing the reaction product A, (3) preparing warm water bath composed of warm water with a constant water temperature between 36-38 degrees C, immersing the glass container containing the reaction product A obtained in the step (2) into the warm water bath to keep the solution inside and outside the container and isolating to obtain a medium temperature reaction pool, continue stirring at a stirring rate of 120-150 revolutions per minute/minute, obtaining the medium temperature reaction pool for 80-90 minutes to obtain a medium temperature reaction solution, taking the glass container out of the warm water bath, ending the intermediate temperature reaction stage and a glass container containing the reaction product B is obtained, (4) preparing high-temperature bath composed of water with a constant water temperature between 95-97 degrees C, immersing the glass container containing the reaction product B obtained in step (3) into the warm water bath to maintain the solution inside and outside the container, isolating to obtain a high temperature to-be-reacted solution tank, injecting 250-300 pts. wt. deionized water at a rate of 5%/minute slowly and uniformly into the high-temperature to-be-reacted solution tank and allowing the reaction to stand for 45-50 minutes to obtain a high-temperature reaction solution, taking the glass container out of the high-temperature bath and end the high-temperature reaction stage to obtain a glass container containing the reaction product C and (5) material separating into a glass container containing reaction product C, injecting 450-500 pts. wt deionized water and centrifuging and washing until the pH value of reaction product C is 6.5-7.5 to obtain a product dispersion, dispersing the product containing the liquid in a spray container with a nozzle diameter of 0.2-0.5 mm to obtain a dispersion liquid sprayer, spraying the dispersion liquid sprayer uniformly and completely on the outer surface of a commercially available CPU heat dissipation structure, using it after natural drying, treating the dried dispersion with a flash of GN/M = 30-35 and irradiation time of 1 millisecond to obtain a CPU heat dissipation structure with the required three-dimensional structure carbon nanotube and graphene composite CPU heat dissipation material to improve heat dissipation efficiency.