▎ 摘　　要

NOVELTY - Preparing copper-based modified graphene oxide composite material with high thermal conductivity comprises e.g. (1) firstly ultrasonically cleaning the H96 copper alloy in clean water, ultrasonically cleaning in anhydrous ethanol solution to remove impurities attached to the surface; degreasing the copper alloy substrate in sodium carbonate solution, washing with water; polishing the copper alloy substrate in hydrochloric acid solution, washing with water; and placing the copper substrate into absolute ethanol solution; and (2) preparing the mixed solution of silane coupling agent and anhydrous methanol solution according to volume ratio of 1:3-5, sufficiently dispersing to obtain mixed solution-A; mixing water and methanol to obtain mixed solution-B; adding the mixed liquid-A to the mixed solution-B, stirring well, adjusting the pH using acetic acid to obtain mixture-C, dropwise adding glycerol to mixture-C, and stirring to obtain silane coupling agent hydrolysis solution. USE - The method is useful for preparing copper-based modified graphene oxide composite material with high thermal conductivity. ADVANTAGE - The composite material: has uniform distribution, no other impurities, and potential application value in heat dissipation materials. DETAILED DESCRIPTION - Preparing copper-based modified graphene oxide composite material with high thermal conductivity comprises (1) firstly ultrasonically cleaning the H96 copper alloy in clean water, ultrasonically cleaning in anhydrous ethanol solution to remove impurities attached to the surface; degreasing the copper alloy substrate in sodium carbonate solution at 55-65 degrees C for 2-3 minutes, washing with water; polishing the copper alloy substrate in hydrochloric acid solution for 2-3 minutes, washing with water; and placing the copper substrate into absolute ethanol solution; (2) preparing the mixed solution of silane coupling agent and anhydrous methanol solution according to volume ratio of 1:3-5, sufficiently dispersing to obtain mixed solution-A; mixing water and methanol according to volume ratio of 40: 15-18 to obtain mixed solution-B; adding the mixed liquid-A to the mixed solution-B, where the volume ratio of the mixed solution-A to the mixed solution-B is 10: 55-58, stirring well, adjusting the pH to 4.5 using acetic acid to obtain mixture-C, dropwise adding glycerol to mixture-C according to the ratio of 1.8-2.2 g of glycerol per liter of mixture C, stirring at 30 degrees C for 8 hours to obtain silane coupling agent hydrolysis solution; (3) ultrasonically dispersing the graphene oxide in aqueous solution according to solid-liquid ratio of 1 g: 800-1000 ml to form aqueous graphene oxide solution; mixing and stirring the silane coupling agent hydrolysis solution and graphene oxide aqueous solution, to obtain stable silane coupling agent and graphene oxide dispersion, that is mixed solution-D, where the amount of the silane coupling agent accounts for 3-4 wt.% of the mixed solution-D; and (4) connecting the pre-processed copper alloy substrate to the negative pole of the pulse power source, serially connecting high-purity carbon rod to positive pole of the pulse power source, carrying pulse electrophoresis in the electrophoresis solution, where pulse current intensity is 0.25A, the duty ratio is 0.25, and the time duration is 4-6 minutes, where the electrophoresis solution is prepared by adding silver nitrate to the mixed solution-D, the amount of silver nitrate added is 0.08-0.12g per liter of mixed solution D; drying the obtained composite material after processing, obtaining the final product. An INDEPENDENT CLAIM is also included for the modified graphene oxide copper composite thermal conductive material is prepared by above mentioned method.