Method for preparing graphene composite structural material

A graphene composite and structural material technology, applied in the direction of graphene, chemical instruments and methods, carbon compounds, etc., can solve the problems of single performance and single internal structure, and achieve the effect of simple preparation method and mature synthesis technology

Active Publication Date: 2018-06-19
TSINGHUA UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the internal structure of graphene macroscopic assemblies is relatively single, resulting in relatively single performance. Therefore, it is necessary to develop new composite structural materials to further expand its properties and achieve multiple beneficial effects within an assembly.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] The preparation method of the graphene composite structural material that the present invention proposes may further comprise the steps:

[0017] (1) Utilize the method for gas phase deposition to prepare graphene film:

[0018] Use methane as the growth gas, argon as the protective gas, hydrogen as the reducing gas, nickel metal foil as the catalyst, and control the thickness of the graphene film generated by controlling the flow of methane so that the thickness of the graphene film is 2-6 microns , annealing the graphene film at 800-1050 degrees Celsius to obtain the graphene film;

[0019] (2) Carry out oxidation exfoliation treatment to graphite powder, obtain graphene oxide aqueous solution:

[0020] Graphite powder and the concentrated sulfuric acid that mass percent concentration is 98wt% are mixed uniformly, mixing ratio is: graphite powder: concentrated sulfuric acid=1: (20-50), obtain the first solution, under ice-bath stirring condition, in the first solutio...

Embodiment 1

[0029] (1) Utilize the method for gas phase deposition to prepare graphene film:

[0030] Use methane as the growth gas, argon as the protective gas, hydrogen as the reducing gas, nickel metal foil as the catalyst, and control the thickness of the graphene film generated by controlling the flow rate of methane so that the thickness of the graphene film is 2 microns. The graphene film is annealed at 800 degrees Celsius to obtain a graphene film;

[0031] (2) Carry out oxidation exfoliation treatment to graphite powder, obtain graphene oxide aqueous solution:

[0032] Graphite powder and the concentrated sulfuric acid that mass percent concentration is 98wt% are mixed uniformly, mixing ratio is: graphite powder: concentrated sulfuric acid=1: 20, obtain the first solution, under ice-bath stirring condition, add high manganese in the first solution Potassium permanganate, the addition ratio of potassium permanganate is: the first solution: potassium permanganate=1:0.1, to obtain ...

Embodiment 2

[0038] (1) Utilize the method for gas phase deposition to prepare graphene film:

[0039] Using methane as the growth gas, argon as the protective gas, hydrogen as the reducing gas, and nickel metal foil as the catalyst, the thickness of the graphene film is controlled by controlling the flow rate of methane so that the thickness of the graphene film is 6 microns. The graphene film is annealed at 1050 degrees Celsius to obtain a graphene film;

[0040] (2) Carry out oxidation exfoliation treatment to graphite powder, obtain graphene oxide aqueous solution:

[0041] Graphite powder and the concentrated sulfuric acid that mass percentage concentration is 98wt% are mixed uniformly, mixing ratio is: graphite powder: concentrated sulfuric acid=1: 50, obtain the first solution, under ice-bath stirring condition, add high manganese in the first solution Potassium permanganate, the addition ratio of potassium permanganate is: first solution: potassium permanganate=1:0.3, obtains the ...

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Abstract

The invention relates to a method for preparing a graphene composite structural material, which belongs to the technical field of preparation of a functional material. The method combines with a vapour deposition technology, a freeze drying technology, and a laser processing technology, construction of a composite structure in a graphene block material is realized, the graphene assembly is composited with two structures, the prepared composite structural material has a two-layer structure, wherein an upper layer is a porous gel structure having good photothermal conversion capability, a lowerlayer is a film structure having good electrothermal conversion capability, and compositing of two structures and properties in the graphene material is realized. The preparation method has the advantages of easy operation, matured synthesis technology, and large-batch production. The porous gel structure at the upper layer of the prepared graphene composite structural material can convey the solar irradiance to self heat energy, the structure at the lower layer can convey electric energy to heat energy, and under synergism of light, heat and electricity, the graphene composite structural material is in favor of application in the fields of solar energy cleaning water and anti-freeze equipment.

Description

technical field [0001] The invention relates to a preparation method of a graphene composite structure material, belonging to the technical field of preparation of functional materials. Background technique [0002] Graphene is a two-dimensional planar carbon material with high electron mobility, large specific surface area, excellent mechanical properties and thermal conductivity, and has been widely used in the development of energy conversion and storage devices. The ordered assembly of graphene can introduce the unique properties of graphene into macroscopic structures. In 2008, scientists prepared a macroscopic graphene film by vacuum filtration assembly. In 2010, scientists used hydrothermal synthesis to construct three-dimensional graphene, and have successfully applied it to fuel cells and compressed capacitor electrode materials. preparation. In view of the excellent effect of macroscopic assemblies in energy devices, people have further carried out a lot of resea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/186C01B32/198
CPCC01P2004/80Y02P20/133
Inventor 曲良体程虎虎张盼盼
Owner TSINGHUA UNIV
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