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Method for preparing graphene composite based on combustion synthesis reaction

A composite material, combustion synthesis technology, applied in the direction of graphene, chemical instruments and methods, anti-corrosion coatings, etc., can solve the problems of difficult scale promotion, complicated operation, high equipment requirements, etc., to achieve optimized production process, simple operation, The effect of high safety factor

Inactive Publication Date: 2018-12-21
TONGCHUANG KEXIN MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has high requirements for equipment and complicated operation, and it is difficult to promote it on a large scale.

Method used

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  • Method for preparing graphene composite based on combustion synthesis reaction
  • Method for preparing graphene composite based on combustion synthesis reaction
  • Method for preparing graphene composite based on combustion synthesis reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The graphene composite material preparation method of embodiment 1 is as follows:

[0053] Select magnesium powder with an average particle size of 100 microns and alumina powder of 200 nanometers and mix them in a ball mill jar for 1 hour. The mass ratio of alumina powder to magnesium powder is 4:1 (i.e. M=4). The raw material powder is placed in the graphite grinding tool of the reaction device. In the carbon dioxide gas of 0.5MPa, the 50A tungsten wire coil is energized to induce the magnesium powder in the raw material and carbon dioxide to undergo a self-propagating combustion reaction (5097K, 40min). After the device is cooled, Obtain gray-black graphene composite powder. attached figure 1 It is a schematic diagram of the reaction principle of the preparation method. attached figure 2 is a schematic diagram of the reaction products.

Embodiment 2

[0055] In the preparation method of the graphene composite material in Example 2, the mass ratio of alumina powder to magnesium powder is controlled to be 5:1 (ie M=5), and the rest are the same as in Example 1.

Embodiment 3

[0057] In the preparation method of the graphene composite material in Example 3, the mass ratio of alumina powder to magnesium powder is controlled to be 6:1 (ie M=6), and the rest are the same as in Example 1.

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Abstract

The invention discloses a method for preparing a graphene composite based on combustion synthesis reaction. The preparation method comprises the following steps of 1) uniformly mixing magnesium powderand aluminum oxide powder to obtain mixed powder; and 2) putting the mixed powder in a graphite grinding tool of a reactor, performing electrifying to induce propagating combustion reaction under thecarbon dioxide atmosphere, and performing cooling to obtain a graphene composite powder material. The invention provides a preparation technology based on magnesium thermal combustion, wherein by taking the magnesium powder and carbon dioxide as reactants, the combustion synthesis reaction is utilized to prepare graphene. The preparation method of the graphene is green, rapid and efficient and can realize scale production; and the technology has the advantages of simpleness in operation, short period and low cost.

Description

technical field [0001] The invention relates to a method for preparing a graphene composite material based on a combustion synthesis reaction. Background technique [0002] At present, the methods for preparing graphene mainly include: mechanical exfoliation method, solvent exfoliation method, crystal epitaxial growth method, chemical vapor deposition method and graphite oxide reduction (Hummer method) method, etc. The efficiency of graphene sheets produced by mechanical exfoliation and solvent exfoliation is very low; crystal epitaxy and chemical vapor deposition are suitable for the preparation of large-area graphene films, but cannot meet the requirements of large-scale and low-cost graphene in the field of composite materials. Although the graphite oxide reduction method can produce a large amount of graphene at a lower cost, the electronic structure and crystal integrity of graphene are damaged by strong oxidants and a large number of defects are introduced. How to pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C09D5/10
CPCC01B32/184C01B2204/04C09D5/106
Inventor 李永冯波宇陈忠平李鹏陈锡麟潘敏尧
Owner TONGCHUANG KEXIN MATERIAL TECH CO LTD
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