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Metal/graphene composite material and preparation method as well as application thereof

A composite material, graphene technology, applied in the direction of metal/alloy conductors, cable/conductor manufacturing, electrical components, etc., can solve the problems of brittle composite materials, poor bonding strength, cumbersome process, etc., to achieve good conductivity and high bonding strength. Effect

Active Publication Date: 2015-05-20
NINGBO GRAPHENE INNOVATION CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the traditional chemical synthesis method has high requirements on experimental conditions and cumbersome process, and the existence of graphene oxide in the prepared composite material will affect the conductivity of the composite material. At the same time, due to the poor wetting effect of graphene on copper Well, only by adsorption and composite with copper, the bonding strength is very poor, resulting in the prepared composite material is very brittle and difficult to process, which is not conducive to the further development of copper / graphene composite materials

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  • Metal/graphene composite material and preparation method as well as application thereof
  • Metal/graphene composite material and preparation method as well as application thereof
  • Metal/graphene composite material and preparation method as well as application thereof

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preparation example Construction

[0042] The present invention also provides a method for preparing the metal / graphene composite material described in the above technical scheme, comprising the following steps:

[0043] a) mixing the surface-treated micron-sized metal powder with graphene-based raw materials, annealing, and obtaining metal powder wrapped with graphene-based raw materials;

[0044] b) mixing the above metal powder wrapped with graphene-based raw materials with a reducing agent in a metal salt solution, and performing an oxidation-reduction reaction to obtain a metal / graphene composite material.

[0045]In the present invention, the surface-treated micron-sized metal powder is mixed with graphene-based raw materials, and annealed to obtain copper powder wrapped with graphene-based raw materials. In the present invention, the graphene-based raw material is graphene or graphene oxide; the present invention has no special restrictions on the source of the graphene-based raw material, and adopts com...

Embodiment 1

[0078] (1) After mixing 100g of spherical micron-sized copper powder with an average particle size of 1.8μm and 30g of silane coupling agent evenly, then filter and wash to obtain surface-treated micron-sized copper powder, and then surface-treated micron-sized copper powder Disperse copper powder in 100g of water, stir until uniformly dispersed, and obtain solution A; at the same time, add 1g of graphene to solution A, stir ultrasonically for 5min under the condition of 1200W power, filter, wash and dry to obtain a solid powder, and then dissolve the solid powder Raise the temperature to 250°C at a heating rate of 10°C / min for 2 hours, then raise the temperature to 650°C at a heating rate of 10°C / min for 2 hours, and finally perform annealing treatment to obtain graphene-coated copper powder.

[0079] (2) Add 10.5g of the above-mentioned graphene-wrapped copper powder to 300mL of copper sulfate solution containing 5g, then add 1.5g of hydrazine hydrate, and react at 85°C for 2...

Embodiment 2

[0083] (1) Mix 100g of flaky micron-sized copper powder with an average particle size of 5μm and 50g of silane coupling agent evenly, then filter and wash to obtain surface-treated micron-sized copper powder, and then surface-treated micron-sized copper powder Copper powder is dispersed in 150g of water, stirred until uniformly dispersed, and solution A is obtained; at the same time, 0.5g of graphene oxide or graphene is added to solution A, and ultrasonically stirred for 10min under the condition of 1200W power, suction filtered, washed and dried to obtain Solid powder, then the solid powder is heated to 250°C at a heating rate of 10°C / min and kept for 2h, then raised to 650°C at a heating rate of 10°C / min and kept for 2h, and finally annealed to obtain graphene-coated copper pink.

[0084] (2) Add 10.05g of the above-mentioned graphene-wrapped copper powder to 300mL of copper sulfate solution containing 2.5g, then add 0.7g of hydrazine hydrate, and react at 85°C for 2h to ob...

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Abstract

The invention provides a metal / graphene composite material and a preparation method as well as application thereof. The metal / graphene composite material comprises a core, a shell and nanoparticles, wherein the shell wraps the outer side of the core; the nanoparticles are compounded on the surface of the shell; the core is micron-sized metal powder; the micron-sized metal powder is selected from one or more of micron-sized copper powder, micron-sized nickel powder, micron-sized zinc powder, micron-sized silver powder and micron-sized tin powder; the shell is graphene; the nanoparticles are selected from one or more of nano-scale copper powder, nano-scale nickel powder, nano-scale zinc powder, nano-scale silver powder and nano-scale tin powder. A functional material which is prepared by sintering the metal / graphene composite material and the copper powder meanwhile has good conductivity and higher bonding strength; the electrical conductivity of the composite material provided by the invention is more than 85 percent of that of a pure copper material, and the tensile strength is more than 500 MPa and is far higher than the tensile strength of the pure copper material.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, and more specifically, relates to a metal / graphene composite material and its preparation method and application. Background technique [0002] Copper is a very widely used metal, and the importance of its metals and alloys is very important, especially the conductivity of pure copper, which is unmatched by other metals except silver. But the current bottleneck in the development of the copper industry is that the strength and conductivity of copper cannot be perfectly combined. Pure copper has good electrical conductivity, but poor strength; some copper alloys have greatly improved strength, but at the same time lose a lot of conductivity. Therefore, it is of great significance to the development of the copper industry to compound the reinforcement with copper. [0003] At present, since the strength of graphene is at the GPa level and the conductivity is high, the use o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/02H01B13/00
Inventor 蒋蓉蓉周旭峰刘兆平
Owner NINGBO GRAPHENE INNOVATION CENT CO LTD
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