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Graphene heat-conducting film as well as preparation method and production equipment thereof

A graphene film, graphene technology, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of high equipment requirements, large waste, high composition, and achieve fast drying speed, high efficiency, and high energy consumption Effect

Active Publication Date: 2019-03-15
CHANGZHOU FUXI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This scheme is the key research object of the inventors of the present disclosure, and there are also the problems in the patent CN106495133. At the same time, because it wants to obtain a porous graphene film, the graphene oxide film must be reduced with a reducing agent, which is difficult and wasteful. Unable to meet industrial sewage requirements
In addition, the three-stage high-temperature reduction of this patent has high composition, high requirements for equipment, and high difficulty in operation and control, which cannot be applied industrially and can only stay in the laboratory stage

Method used

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  • Graphene heat-conducting film as well as preparation method and production equipment thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] 1. Disperse graphene oxide in water to prepare graphene oxide slurry with 1% solid content.

[0078] 2. Apply the above-mentioned graphene oxide slurry on the steel belt by scraping, the coating thickness is 3mm, the temperature in the front section of the drying tunnel is 120°C, and the last 5 meters of the drying tunnel is at 330°C. The traveling speed of the material was 5 m / min, and a large piece of partially reduced graphene oxide membrane was obtained.

[0079] 3. The above-mentioned partially reduced graphene oxide membrane is pulverized into particles with a particle diameter of 0.5mm through a pulverizer, and pressed into a partially reduced graphene oxide membrane with a thickness of 0.1mm through a 5MPa counter-roller.

[0080] 4. Heat-treat the partially reduced graphene oxide film formed above at 2780° C. for 5 hours to obtain a graphene heat-conducting film.

[0081] 5. Roll the above-mentioned graphene heat-conducting film through 12 MPa to obtain a grap...

Embodiment 2

[0083] 1. Disperse graphene oxide in NMP to prepare graphene oxide slurry with a solid content of 2.1%.

[0084] 2. Apply the above-mentioned graphene oxide slurry on the steel strip by scraping, the coating thickness is 3.5mm, the temperature in the front section of the drying tunnel is 200°C, and the last 5m area at the back end of the drying tunnel is 380°C, keep The traveling speed of the strip was 5 m / min, and large pieces of partially reduced graphene oxide membranes were obtained.

[0085] 3. The above-mentioned partially reduced graphene oxide membrane is pulverized into particles with a particle diameter of 1mm through a pulverizer, and pressed into a partially reduced graphene oxide membrane with a thickness of 0.3mm through an 8MPa counter-roller.

[0086] 4. Heat-treat the partially reduced graphene oxide film formed above at 1000° C. for 18 hours to obtain a graphene heat-conducting film.

[0087] 5. Roll the above-mentioned graphene heat-conducting film through ...

Embodiment 3

[0089] 1. Disperse graphene oxide in 70% water plus 30% NMP to prepare graphene oxide slurry with 3% solid content.

[0090] 2. Apply the above-mentioned graphene oxide slurry on the steel strip by scraping, the coating thickness is 2.5mm, the temperature in the front section of the drying tunnel is 150°C, and the last 5 meters of the drying tunnel is at 350°C. The traveling speed of the strip was 5 m / min, and large pieces of partially reduced graphene oxide membranes were obtained.

[0091] 3. The above-mentioned partially reduced graphene oxide membrane is crushed into particles with a particle diameter of 0.7mm through a pulverizer, and pressed into a partially reduced graphene oxide membrane with a thickness of 3mm by a 6MPa counter-roller.

[0092] 4. The partially reduced graphene oxide film pressed above is heat-treated at 2950°C for 10 hours, and the heat-conducting graphene heat-conducting film

[0093] 5. Roll the above-mentioned graphene heat-conducting film at 15 ...

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Abstract

The invention provides a graphene heat-conducting film as well as a preparation method and production equipment thereof. The preparation method comprises the following steps: with graphene oxide as aprecursor, coating a tape with graphene oxide slurry, drying, and collecting the dried graphene oxide; grinding the dried graphene oxide, and pressing into a film; performing heat treatment on the pressed film so as to form a graphene film; and pressing again, thereby obtaining the graphene heat-conducting film disclosed by the invention.

Description

technical field [0001] The invention relates to a heat conduction and heat dissipation film, a preparation method thereof, and production equipment, in particular to a graphene heat conduction film, a preparation method thereof, and production equipment. Background technique [0002] The emergence of intelligent electronic products has further increased the concentration of electronic circuits. Although the heat flux density of chips is getting higher and higher, the existing chip heat-conducting materials are increasingly unable to meet the needs of chip heat dissipation. Single-layer graphene has a thermal conductivity of 5300W / m·K. Using graphene to prepare high thermal conductivity materials is an important and simple way. In the current technical scheme, graphene oxide is used for preparation. First, graphene oxide is dispersed in a solvent, and then a graphene oxide film is prepared, and then a graphene film is obtained through reduction. For example, Chinese patent C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/198C01B32/182
CPCC01B2204/04C01B2204/24C01B2204/32
Inventor 周步存周仁杰
Owner CHANGZHOU FUXI TECH CO LTD
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