▎ 摘　　要

NOVELTY - Preparing three-dimensional (3D) structure nano-carbon material reinforced copper-based composite material involves pretreating graphene oxide and carboxylated carbon nanotubes separately. The pre-treated graphene oxide and pre-treated carboxylated carbon nanotubes are dispersed ultrasonically in dimethylformamide (DMF) and mixed uniformly. The amidation reaction is performed by magnetic stirring at room temperature, followed by filtration, washing and freeze drying in order to obtain three-dimensional structure graphene oxide (GO)-polyamino compound-carbon nanotubes (CNTs) nano-carbon material. The GO is dispersed in DMF. The activator 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) and stabilizer N-hydroxy succinimide (NHS) are added, stirred at room temperature to activate, filtered and washed in turn. The activated GO (f-GO) is obtained. The excessive amount of polyamino compound is added to f-GO and dispersed. USE - Method for preparing three-dimensional structure nano-carbon material reinforced copper-based composite material. ADVANTAGE - The method enables to prepare 3D structure nano-carbon material reinforced copper-based composite material that uses polyamino compound to connect graphene oxide with carboxylated carbon nanotubes, inhibits GO aggregation, solves problem of poor dispersion and wettability of graphene and carbon nanotubes in copper matrix, and improves mechanical properties. DETAILED DESCRIPTION - Preparing three-dimensional (3D) structure nano-carbon material reinforced copper-based composite material involves pretreating graphene oxide and carboxylated carbon nanotubes separately. The pre-treated graphene oxide and pre-treated carboxylated carbon nanotubes are dispersed ultrasonically in dimethylformamide (DMF) and mixed uniformly. The amidation reaction is performed by magnetic stirring at room temperature, followed by filtration, washing and freeze drying in order to obtain three-dimensional structure graphene oxide (GO)-polyamino compound-carbon nanotubes (CNTs) nano-carbon material. The GO is dispersed in DMF. The activator 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) and stabilizer N-hydroxy succinimide (NHS) are added, stirred at room temperature to activate, filtered and washed in turn. The activated GO (f-GO) is obtained. The excessive amount of polyamino compound is added to f-GO and dispersed. The amidation reaction is carried out with magnetic stirring at room temperature, filtered and washed in turn to obtain GO-polyamino compound. The carboxylated carbon nanotubes CNTs-OOH are dispersed in DMF, stirred at room temperature for activation, filtered and washed in sequence to obtain fluorinated-CNTs (f-CNTs). The 3D structure GO-polyamino compound-CNTs nano-carbon material is dispersed in ammonia aqueous solution containing copper acetate. The sodium hydroxide solution is added drop by drop under magnetic stirring to react. The reaction solution system is gradually changed from light blue to black, filtered and washed in turn to obtain 3D structure GO-polyamino compound-CNTs/copper oxide (CuO) particles. The 3D structure GO-polyamino compound-CNTs/CuO particles is placed in aluminum oxide ark, and placed in tube furnace for reduction to obtain 3D structure GO-polyamino compound-CNTs/copper (Cu). The three-dimensional structure GO-polyamino compound-CNTs/Cu are placed in graphite mold, subjected to spark plasma sintering under vacuum conditions, and taken out after cooling to room temperature to obtain 3D structure nano-carbon material reinforced copper matrix composite material.