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Foam metal-graphene composite material and preparation method thereof

A foam metal and composite material technology, applied in electrolytic coatings, electrophoretic plating, coatings, etc., can solve the problems of high price and complicated instrument operation, and achieve the effects of low cost, good conductivity and obvious effect.

Inactive Publication Date: 2017-05-31
CHANGDE LYRUN MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the composite material of the present invention, in its preparation method, compared with the electrophoresis method, the CVD method is expensive and the instrument operation is complicated

Method used

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  • Foam metal-graphene composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Cleaning the foamed nickel substrate: three kinds of foamed nickel with PPI of 20, 90, 110 and a thickness of 1.5 mm were immersed in a mixed solution of acetone and ethanol with a volume ratio of 1:1 and ultrasonically cleaned for 30 minutes. Soak in HCl solution for 30 minutes to remove surface oxides, and finally wash with deionized water and dry for later use;

[0024] (2) Prepare graphene: adopt improved hummer's method, add the vitriol oil of 50ml 98% in the 250ml beaker, oil bath is heated to 90 ℃, adds 10g K thereto 2 S 2 o 8 and 10g P 2 o 5 After dissolving, cool down to 80°C, add 12g of graphite powder to react for 4-5h, then cool to room temperature, add 2L of deionized water overnight, filter with suction, and dry at room temperature to obtain pre-oxidized graphite powder. Add 6g of pre-oxidized graphite powder to a beaker containing 230ml of concentrated sulfuric acid, stir in an ice bath for 30min, then gradually add 30g of KMnO 4 powder, heated t...

Embodiment 2

[0031] Select foamed nickel with a pore size of 110PPI and a thickness of 0.5mm, 1.0mm, and 1.5mm as the research object to prepare a foamed nickel-graphene composite material. The specific experimental steps are as follows:

[0032] (1) Clean the foamed nickel substrate: PPI is 110, and three kinds of foamed nickels with thicknesses of 0.5mm, 1.0mm, and 1.5mm are immersed in a mixed solution of acetone and ethanol with a volume ratio of 1:1 and ultrasonically cleaned for 30 minutes, and then cleaned in 6mol Soak in 1 / L HCl solution for 30 minutes to remove surface oxides, and finally wash with deionized water and dry for later use;

[0033] (2) prepare graphene with embodiment 1;

[0034] (3) Modified graphene: Weigh 45mg of graphene and 45mg of Mg(NO 3 ) 2 *6H 2 O electrolyte is added in isopropanol, and the concentration of preparation graphene is the electrophoretic liquid of 0.3mg / ml, and ultrasonic 3h is obtained at room temperature, obtains electrophoretic liquid;

...

Embodiment 3

[0037] Replace the nickel foam with PPI20, the thickness is 1.5mm, the experimental steps are as follows:

[0038] (1) Clean the foamed nickel substrate: PPI is 20, and the foamed nickel with a thickness of 1.5mm is immersed in a mixed solution of acetone and ethanol with a volume ratio of 1:1 and ultrasonically cleaned for 30 minutes, and then soaked in 6mol / L HCl solution for 30 minutes To remove surface oxides, finally wash with deionized water and dry for later use;

[0039] (2) prepare graphene with embodiment 1;

[0040] (3) Modified graphene: Weigh 15 mg of graphene and 30 mg of Mg(NO 3 ) 2 *6H 2 O electrolyte is added in isopropanol, and the concentration of preparation graphene is the electrophoresis fluid of 0.1mg / ml, ultrasonic 3h under room temperature, obtains electrophoresis fluid;

[0041] (4) Electrophoretic deposition: The above-mentioned cleaned nickel foam is used as the cathode, and the molybdenum electrode is used as the anode. Put it into the electrop...

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Abstract

The invention discloses a foam metal-graphene composite material and a preparation method thereof. The composite material comprises a foam metal substrate layer and a graphene film layer on the substrate layer. The foam metal-graphene composite material is prepared by electrophoresis. The method specifically comprises the following steps of: removing oil stains and oxides on the surface of the foam metal substrate layer, preparing graphene by an oxidation-reduction method, modifying the graphene and performing electrophoretic deposition of the graphene on the surface of foam metal. Within a certain electromagnetic wave band, on one hand, the foam metal-graphene composite material has the structural advantages of light weight, porosity, large specific surface area and favorable conductive properties of the foam metal, and on the other hand, the foam metal-graphene composite material has excellent electrical conductivity and high dielectric constants of self-made graphene, and the properties of the self-made graphene that electromagnetic waves are well absorbed due to a large number of defects and functional group residues. The composite material has a high electromagnetic shielding effect, and can be used as an excellent electromagnetic shielding material.

Description

technical field [0001] The invention belongs to the field of composite materials, in particular to a metal foam-graphene composite material and a preparation method thereof. Background technique [0002] Porous metal foam has attracted extensive attention from researchers because of its light weight, high specific surface area, and good thermal conductivity. Secondary reflection and scattering loss, within a certain band, it has the same electromagnetic shielding effectiveness as a solid metal plate. At present, domestic research on the use of porous metal foam as electromagnetic shielding material is relatively lacking, and it is necessary to conduct systematic functional application research on it. Since graphene was discovered by Nobel Prize winners Andre Geim and Kostya Novoselov in 2004, its unique structure and excellent performance have attracted widespread attention from researchers. Graphene is composed of carbon atoms with sp 2 It is a carbonaceous material with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D13/02
Inventor 余兴华易秋珍钟建夫朱济群
Owner CHANGDE LYRUN MATERIAL
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