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
View PDF9 Cites 47 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
particle diameteraaaaaaaaaa
densityaaaaaaaaaa
Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap