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A kind of metal/graphene composite material and preparation method thereof

A composite material and graphene technology, applied in the coating and other directions, can solve problems such as environmental pollution, long production cycle, interface impact, etc., and achieve the effects of easy mass production, high production efficiency, and performance optimization.

Active Publication Date: 2017-08-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical solution provided by this patent includes multiple washing and drying steps and a reduction process under a special atmosphere. The production cycle is long, and a variety of reducing agents are mentioned in the solution, which will cause environmental pollution and the steps are cumbersome
In addition, the necessary steps of the patent’s technical solution include coating a layer of polymer film on the surface of the flake metal powder to promote the adsorption of graphene oxide. Although the polymer is pyrolyzed and removed during the reduction process, the polymer The existence of the film and its thermal cracking process will inevitably affect the interface between graphene oxide and metal powder, and the state of the interface in the composite material directly determines the performance of the material

Method used

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  • A kind of metal/graphene composite material and preparation method thereof
  • A kind of metal/graphene composite material and preparation method thereof
  • A kind of metal/graphene composite material and preparation method thereof

Examples

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Embodiment 1

[0040] The present embodiment relates to the preparation method of graphene / aluminum composite material, and described method comprises the steps:

[0041] Step 1: preparing a graphene oxide solution: preparing a graphene oxide aqueous solution by an improved Hummers method, and adjusting the concentration of the graphene oxide aqueous solution to 0.2 mg / ml by adding deionized water.

[0042] Step 2: adjust the pH value of the graphene oxide aqueous solution: take 25ml of the graphene oxide solution described in step 1, and adjust the pH of the solution to 4 by adding 0.1mol / L dilute hydrochloric acid or 0.1mol / L NaOH solution.

[0043] Step 3: At room temperature, take 1 g of aluminum powder with a particle size of 20 μm and add it to the graphene oxide aqueous solution with a pH of 4 as described in step 2. The aluminum particles and graphene oxide are fully mixed and reacted by magnetic stirring. The reaction time is 24 hours A uniformly dispersed graphene / aluminum particle...

Embodiment 2

[0047] The present embodiment relates to the preparation method of graphene / iron composite material, and described method comprises the steps:

[0048] Step 1: preparing a graphene oxide solution: prepare a graphene oxide aqueous solution by an improved Hummers method, and adjust the concentration of the graphene oxide aqueous solution to 0.5 mg / ml by adding deionized water.

[0049] Step 2: adjust the pH value of the graphene oxide aqueous solution: take 50 ml of the graphene oxide solution described in step 1, and adjust the pH of the solution to 5 by adding 0.1 mol / L dilute hydrochloric acid.

[0050] Step 3: At room temperature, take 1 g of iron powder with a particle size of 15 μm and add it to the graphene oxide aqueous solution with a pH of 5 as described in step 2. The iron particles and graphene oxide are fully mixed and reacted by magnetic stirring, and the reaction time is 0.5 h, A uniformly dispersed graphene / iron particle mixture obtained by in-situ reduction of g...

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Abstract

The invention discloses a metal / graphene composite material and a preparation method thereof. The metal / graphene composite material comprises metal particles and graphene; the metal particles are uniformly clad with the graphene; the mass ratio of the metal to the graphene is 1:(0.005-0.1); and the graphene is reduced graphene oxide which has an atom-laminated structure and is obtained through in-situ reduction of graphene oxide on the surfaces of the metal particles. Compared with a traditional preparation method, the preparation method disclosed by the invention has the advantages that the processes of metal melting, activating and the like are not performed, so that the preparation procedure of the composite material is greatly simplified; energy waste and environment pollution are avoided; and the metal / graphene composite material which is higher in dispersity and better in property is obtained.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a metal / graphene material and a preparation method thereof. Background technique [0002] Graphene is made of sp 2 The two-dimensional honeycomb crystal composed of hybrid carbon atoms is simply a single-layer graphite sheet, which is only one carbon atom thick. The basic structural unit is a benzene six-membered ring, and the carbon-carbon bond length is about 0.142nm. The structure of graphene is very stable, and the connection between carbon atoms is very flexible. When the carbon atom plane is subjected to external force, it can bend and deform to ensure the stability of its own structure. Graphene is the thinnest two-dimensional material found so far, with a thickness of only 0.34nm. The unique structure of graphene makes it have many excellent characteristics, such as: mechanical, optical, electrical, thermal and other physical and chemical properties, and also has a hu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02B22F3/02
Inventor 慈立杰侯广梅翟伟艾青
Owner SHANDONG UNIV
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