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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 complicated operation and high price of instruments, and achieve the effects of good conductivity, low cost, and good wave absorbing efficiency.

Active Publication Date: 2013-12-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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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
  • Foam metal-graphene composite material and preparation method thereof
  • Foam metal-graphene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Clean the foamed nickel substrate: PPI is 20, 90, 110, and three kinds of foamed nickel with a thickness of 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 at 6mol / L Soak in HCl solution for 30 minutes to remove surface oxides, and finally wash with deionized water and dry for later use;

[0029] (2) Preparation of graphene: Using the improved hummer's method, add 50ml of 98% concentrated sulfuric acid to a 250ml beaker, heat the oil bath to 90°C, add 10g of K 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 gradual...

Embodiment 2

[0038] 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:

[0039] (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;

[0040] (2) prepare graphene with embodiment 1;

[0041] (3) Modified graphene: Weigh 45mg of graphene and 45mg of Mg(NO 3 ) 2 ·6H 2 O electrolyte was added in isopropanol to prepare an electrophoretic solution with a graphene concentration of 0.3 mg / ml, and ultrasonicated for 3 hours at room temperature to obtain an electrophoretic solution; ...

Embodiment 3

[0045] Replace the nickel foam with PPI20, the thickness is 1.5mm, the experimental steps are as follows:

[0046] (1) Clean the foamed nickel substrate: PPI is 20, and the foamed nickel with a thickness of 1.5 mm 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;

[0047] (2) prepare graphene with embodiment 1;

[0048] (3) Modified graphene: Weigh 15 mg of graphene and 30 mg of Mg(NO 3 ) 2 ·6H 2 O electrolyte is added in isopropanol, the concentration of preparation graphene is the electrophoretic liquid of 0.1mg / ml, ultrasonic 3h at room temperature, obtains electrophoretic liquid;

[0049] (4) Electrophoretic deposition: the above-mentioned cleaned nickel foam is used as the cathode, and the platinum electrode is used as the anode. Put it into the electrophoreti...

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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 and a graphene film layer positioned on the substrate. The foam metal-graphene composite material is prepared by means of electrophoresis. Specifically, the preparation method comprises the following steps: removing greasy dirt and oxides from the surface of a foam metal substrate, preparing graphene by the oxidation-reduction method, modifying graphene, and performing electrophoretic deposition on the graphene on the surface of the foam metal substrate. Within a certain of electromagnetic waveband, on one hand, the foam metal-graphene composite material has the structural advantages of light weight and porosity, large specific surface area and good conductivity of a foam metal, and on the other hand, the composite material integrates excellent electrical conductivity and high dielectric constant, a capacity of being more conducive to absorbing electromagnetic waves due to a large amount of defects and functional group residues of the self-made graphene, and other properties of self-made graphene. The composite material has a higher electromagnetic shielding performance and can serve as an excellent electromagnetic shielding material.

Description

Technical field [0001] The invention is a composite material field, especially involving a foam-graphene composite material and its preparation method. Background technique [0002] With the popularization of various electronics products today, the electromagnetic waves of different wavelengths and frequencies are filled with various spaces. These electromagnetic waves not only seriously interfere with the normal use of electronic products, lead to the leakage of information such as computers and other instruments, but also endangers human health.Therefore, improving electromagnetic compatibility performance of electronic products and preventing electromagnetic wave radiation pollution have become urgent problems in the world today. [0003] Due to the lighter quality, high ratio area, and better thermal conductivity, it has received widespread attention from researchers because of its lighter quality, high ratio surface area. It has metal conductivity, and the multi -porous stru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D13/02
Inventor 戴振东姬科举赵慧慧
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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