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A kind of graphene/copper composite powder and its preparation method, graphene/copper composite material and its preparation method and application

A composite material and composite powder technology, which is applied in the field of metallurgy, can solve the problems of long time consumption, poor mechanical properties and electrical conductivity of graphene/copper composite materials, and inability to produce in large quantities.

Active Publication Date: 2022-03-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The Chinese patent with the publication number CN107236972A discloses a preparation method for preparing graphene / copper composite powder by electrochemical deposition using copper-nickel mixed salt as raw material. This preparation method takes a long time, and the concentration of graphene in the prepared composite material Low, poor conductivity, and cannot be mass produced
[0008] The Chinese patent with the publication number CN104711443A discloses a preparation method of mixing copper-nickel alloy powder and flake graphite by mechanical ball milling, and then obtaining graphene / copper composite materials by powder metallurgy and rolling. Although the preparation method is a process Simple and easy to control, but the conductivity of the material is greatly reduced, and the tensile strength is improved slightly
[0009] From this point of view, the graphene / copper composite material prepared by the existing method has poor mechanical properties and electrical conductivity, and does not have the defects of high temperature performance.

Method used

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  • A kind of graphene/copper composite powder and its preparation method, graphene/copper composite material and its preparation method and application
  • A kind of graphene/copper composite powder and its preparation method, graphene/copper composite material and its preparation method and application
  • A kind of graphene/copper composite powder and its preparation method, graphene/copper composite material and its preparation method and application

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preparation example Construction

[0038] The invention provides a kind of preparation method of graphene / copper composite powder, comprises the following steps:

[0039] Mixing an acidic solution containing copper ions and an aqueous graphene solution to obtain a mixed solution, or mixing an acidic solution containing copper ions and an aqueous graphene oxide solution to obtain a mixed solution;

[0040] The mixed solution is subjected to electrodeposition, and the graphene / copper composite powder is collected during the electrodeposition process.

[0041] In the present invention, the acidic solution containing copper ions and the graphene aqueous solution are mixed to obtain a mixed liquid, or the acidic solution containing copper ions and the graphene oxide aqueous solution are mixed to obtain a mixed liquid. In the present invention, the acidic solution containing copper ions is preferably composed of one or more of copper sulfate, copper nitrate, copper acetate and ketone acetate; the concentration of cop...

Embodiment 1

[0056] Take copper sulfate solution 431mL with copper ion concentration of 64g / L, concentrated sulfuric acid 230mL, polyvinylpyrrolidone (PVP) 2.76g, graphene oxide concentration is 276mL of graphene oxide dispersion liquid of 1g / L, deionized water 1823mL, made into mixture. Stir the solution to dissolve all the PVP and disperse the graphene oxide evenly.

[0057] Put the electrode into the mixed solution for electrodeposition, in which the copper plate is used as the anode, and the titanium plate is used as the cathode, respectively connected to the positive and negative electrodes of the power supply, using 31.25mA / cm 2 Electrodeposition was carried out at a certain current density, and the composite powder on the titanium plate was collected every 20 minutes. After collecting 30 g of the composite powder, the composite powder was repeatedly washed with deionized water. Put the cleaned composite powder into a tube furnace with an air pressure of 101Pa, raise the temperatur...

Embodiment 2

[0059] The preparation method of reference example 1 prepares graphene / copper composite material, wherein the current density of electroplating is 62.5mA / cm 2 , other steps are all the same as in Example 1.

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Abstract

The invention belongs to the technical field of metallurgy, and in particular relates to a graphene / copper composite powder and a preparation method thereof, a graphene / copper composite material and a preparation method and application thereof. The present invention utilizes the characteristics that graphene is negatively charged in solution and copper ions are positively charged, and the two can attract each other to obtain a uniformly dispersed mixed solution of copper / graphene. Driven by the ions, it adheres to the cathode plate and is partially reduced, so that the oxygen-containing functional groups and defects in the graphene are repaired, and the conductivity of the prepared graphene / copper composite powder is improved. The graphene / copper composite powder prepared by the present invention is used as a raw material to prepare a composite material through reduction heat treatment and certain molding, and the obtained composite material has excellent mechanical, electrical, thermal conductivity and high-temperature stability properties.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a graphene / copper composite powder and a preparation method thereof, a graphene / copper composite material and a preparation method and application thereof. Background technique [0002] Copper has good plasticity, excellent process performance, is convenient for plastic processing, and also has good corrosion resistance, thermal conductivity, electrical conductivity and other properties, so it is widely used in industrial fields such as electronics and machinery manufacturing. With the rapid development of modern electronic equipment and new energy trams, higher requirements are put forward for copper: on the basis of ensuring the physical properties of copper such as good electrical and thermal conductivity, materials are required to have higher strength and better high-temperature performance . However, pure copper has low strength, poor wear resistance and high temperatu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D15/00C25D3/38C22C1/05C22C9/00C01B32/184
CPCC25D15/00C25D3/38C22C1/0425C22C1/05C22C9/00C01B32/184
Inventor 王黎东于佳妮宗影影
Owner HARBIN INST OF TECH