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A kind of heterogeneous graphene film and preparation method thereof

A graphene film and graphene technology, applied in graphene, chemical instruments and methods, nano-carbon, etc., can solve problems such as weak regulation, poor thermal conductivity, and inconspicuous somatosensory effects

Active Publication Date: 2020-08-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a major problem. Polymers such as PE have poor thermal conductivity, and their regulating effect on thermal conductivity is relatively weak, and the somatosensory effect is not obvious.

Method used

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  • A kind of heterogeneous graphene film and preparation method thereof
  • A kind of heterogeneous graphene film and preparation method thereof
  • A kind of heterogeneous graphene film and preparation method thereof

Examples

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Comparison scheme
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preparation example Construction

[0026] A kind of preparation method of heterogeneous graphene membrane, this method comprises the following steps:

[0027] (1) The graphene oxide etched by nitric acid is prepared into a graphene oxide aqueous solution with a concentration of 0.5ug / mL, and the AAO film with a porosity of 50% is used as a base to form a film by suction filtration, and the thickness of the film is 2nm; before drying Add 5ug / mL non-etching graphene oxide solution, continue suction filtration to form a film with a thickness of 10nm, and form a graphene heterogeneous film on the surface of the AAO film.

[0028] (2) Transfer the AAO film with the graphene heterogeneous film attached on the surface to a closed container, and fumigate at 80°C HI for 12 hours.

[0029] (3) Peel off the graphene heterogeneous film from the AAO film, one side of which is made of etched graphene oxide, and the other side is made of non-etched graphene oxide; the peeling method is: the surface is pasted with graphene het...

Embodiment 2

[0035] (1) The graphene oxide etched by nitric acid is formulated into a graphene oxide aqueous solution with a concentration of 5ug / mL, and the AAO film with a porosity of 30% is used as a base to form a film by suction filtration, and the thickness of the film is 27nm; 10ug / mL non-etched graphene oxide solution, continue to filter to form a film, the thickness reaches 100nm, and a graphene heterogeneous film is formed on the surface of the AAO film.

[0036] (2) Transfer the AAO film with the graphene heterogeneous film attached on the surface to a closed container, and fumigate at 100°C HI for 2 hours.

[0037] (3) The graphene heterogeneous film is peeled off from the AAO film, wherein one side is made of etched graphene oxide, and the other side is made of non-etched graphene oxide; the stripping method is: uniformly coating melted camphor on The surface of the graphene heterogeneous film is cooled at room temperature, and the graphene heterogeneous film and AAO are autom...

Embodiment 3

[0042] (1) The graphene oxide etched by nitric acid is formulated into a graphene oxide aqueous solution with a concentration of 10ug / mL, and the AAO film with a porosity of 40% is used as a base to form a film by suction filtration, and the thickness of the film is 12nm; 10ug / mL non-etched graphene oxide solution, continue to filter to form a film, the thickness reaches 40nm, and a graphene heterogeneous film is formed on the surface of the AAO film.

[0043] (2) Transfer the AAO film with the graphene heterogeneous film attached on the surface to a closed container, and fumigate at 100°C HI for 2 hours.

[0044](3) The graphene heterogeneous film is peeled from the AAO film, one side is composed of etched graphene oxide, and the other side is composed of non-etched graphene oxide; the peeling method is: the surface is pasted with graphene heterogeneous The AAO of the film is placed on the water surface with the graphene heterogeneous film facing upwards; the edge of the AAO ...

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Abstract

The invention discloses a heterogeneous graphene film and a preparation method thereof. The graphene film is obtained by the step of carrying out single-sided fluorination or hydrogenation on a nanoscale graphene film. The single-sided graphene is treated at the high temperature of 3000 DEG C, so that almost no defect (less than 0.1%) exits inside the graphene, and heat conduction property and conductivity are stronger; on the hydrogenated or fluorinated surface, a single-sided conjugate structure of the graphene film is destroyed, so that the heat conduction property and the conductivity arevery poor; therefore, the graphene film is thermally conductive unidirectionally. Furthermore, due to the relatively thin graphene thickness and the semi-defective graphene structure, the graphene film is enabled to have certain transparency. The graphene film can be used as a transparent unidirectional electroconductive and thermal-conductive device.

Description

technical field [0001] The invention relates to a high-performance nanometer material and a preparation method thereof, in particular to an ultra-thin heterogeneous graphene film and a preparation method thereof. Background technique [0002] In 2010, two professors Andre GeiM and Konstantin Novoselov from the University of Manchester won the Nobel Prize in Physics for their first successful separation of stable graphene, which set off a wave of research on graphene around the world. Graphene has excellent electrical properties (electron mobility at room temperature can reach 2×10 5 m 2 / Vs), outstanding thermal conductivity (5000W / (MK), extraordinary specific surface area (2630M 2 / g), its Young's modulus (1100GPa) and breaking strength (125GPa). The excellent electrical and thermal conductivity of graphene completely exceeds that of metals. At the same time, graphene has the advantages of high temperature resistance and corrosion resistance, and its good mechanical prop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184C01B32/194
CPCC01B32/184C01B32/194C01P2002/82
Inventor 高超彭蠡沈颖俞丹萍卡西克燕.戈坡塞米
Owner ZHEJIANG UNIV