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Graphene/silver composite material and preparation method thereof

A composite material and graphene technology, applied in the direction of metal/alloy conductor, cable/conductor manufacturing, metal rolling, etc., can solve complex composite process, poor controllability of preparation process, can not guarantee uniform composite of graphene and metal, etc. Problems, to achieve good composite effect, avoid agglomeration and damage, excellent physical properties

Active Publication Date: 2015-06-10
SHANGHAI HIWAVE COMPOSITE MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the specific surface treatment and post-compositing process of sheet metal are more complicated, and the uniform composite of graphene and metal cannot be guaranteed, and the controllability of the preparation process is poor.

Method used

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  • Graphene/silver composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The basic operation steps of present embodiment 1 preparation graphene / silver composite material are as follows:

[0043] Ⅰ) Material composition of graphene / silver composites

[0044] The material components of the graphene / silver composite material are mainly metallic silver and graphene, wherein the metallic silver is prepared by chemical reduction method, the particle size is 0.1μm-5μm, and the proportion of the composite material is 94wt%; the raw material of graphene is The single-layer or few-layer graphene oxide prepared by the Hummers method accounts for 6wt% in the composite material.

[0045] Ⅱ) Basic steps for preparing graphene / silver composites (see attached figure 1 )

[0046] 1) Prepare 0.1mol / L silver nitrate solution and 0.1mol / L ascorbic acid solution (or one or more of glucose, citric acid or oxalic acid);

[0047] 2) adding graphene oxide into deionized water, stirring and dispersing the ions for 0.5 hours to uniformly disperse the graphene oxide...

Embodiment 2

[0053] The main difference from Example 1 is that: Example 2 adds a hot extrusion process to obtain a graphene / silver composite wire.

[0054] The basic operation steps of present embodiment 2 preparing graphene / silver composite wire material are as follows:

[0055] Ⅰ) Material composition of graphene / silver composites

[0056] The material components of the graphene / silver composite material are mainly metallic silver and graphene, wherein the metallic silver is prepared by chemical reduction method, the particle size is 0.1μm-5μm, and the proportion of the composite material is 97wt%; the raw material of graphene is The single-layer or few-layer graphene oxide prepared by the Hummers method accounts for 3wt% in the composite material.

[0057] Ⅱ) Basic steps for preparing graphene / silver composites (see attached figure 1 )

[0058] 1) Prepare 0.25mol / L silver nitrate solution and 0.25mol / L ascorbic acid solution;

[0059] 2) adding graphene oxide into deionized water, s...

Embodiment 3

[0066] The difference from Example 2 is that this Example 3 adds an annealing and rolling process on the basis of Example 2 to obtain a graphene / silver composite strip.

[0067] The basic operation steps of present embodiment 3 preparation graphene / silver composite strips are as follows:

[0068] Ⅰ) Material composition of graphene / silver composites

[0069] The material components of the graphene / silver composite material are mainly metallic silver and graphene, wherein the raw materials and contents of metallic silver and graphene are the same as in Example 2.

[0070] Ⅱ) Basic steps for preparing graphene / silver composites (see attached figure 1 )

[0071] 1) Prepare 0.25mol / L silver nitrate solution and 0.25mol / L ascorbic acid solution;

[0072] 2) adding graphene oxide into deionized water, stirring and dispersing the ions for 0.5 hours to uniformly disperse the graphene oxide to obtain a graphene oxide solution with a mass concentration of 0.9%.

[0073] 3) Mix 2.5L ...

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Abstract

The invention provides a graphene / silver composite material and a preparation method thereof. The preparation method comprises the steps of adding a reducing agent and silver nitrate successively into a graphene oxide solution, combining silver powder obtained by reduction and graphene oxide in the solution, so as to obtain graphene oxide / silver composite powder; drying the graphene oxide / silver composite powder to obtain graphene / silver composite powder; and obtaining graphene / silver composite blocks, composite wires and composite strips through powder metallurgy, hot extrusion and rolling techniques. According to the graphene / silver composite material and the preparation method provided by the invention, the graphene is dispersed uniformly in the composite material, the interface bonding between a substrate and an enhanced body is good, and the composite materials is excellent in physical performance; meanwhile, the preparation method is simple in process, is likely to control the process and likely to realize large-scale production and application.

Description

technical field [0001] The invention belongs to the technical field of metal-based composite materials and their preparation, and specifically relates to a graphene-reinforced silver-based composite material and a preparation method thereof. Background technique [0002] Silver-based composite materials are currently the most widely used electrical contact materials. Due to the insufficient mechanical properties of pure silver, in order to meet its use requirements, it is generally used to prepare silver-based composite materials by combining metal oxide and other reinforcing phases with silver. The conductivity of the silver-based composite material added with such a reinforcing phase is reduced. Graphene is the only environmentally friendly carbonaceous new material with a two-dimensional honeycomb lattice structure that has been discovered so far. Its thickness is usually within 10 nanometers and it has a large specific surface area (2630m 2 / g), is the material with th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B1/02H01B1/04
CPCH01B1/02H01B1/04H01B13/00C22C5/06B21B1/166B21C23/22B22F3/14B22F3/16B22F9/24B22F2201/013B22F2301/255B22F2302/25C22C1/0466
Inventor 陈乐生王鹏鹏刘伟利毛琳
Owner SHANGHAI HIWAVE COMPOSITE MATERIALS CO LTD
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