Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing thick graphene heat dissipation film by using silk screen

A kind of graphene heat dissipation film, graphene film technology, applied in graphene, chemical instruments and methods, cooling/ventilation/heating transformation and other directions, can solve the problems of high complexity and difficulty of thick graphene film process, and achieve fast Heat dissipation application, high friction, good adhesion effect

Pending Publication Date: 2021-01-15
STONEPLUS THERMAL MANAGEMENT TECH
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of method that utilizes silk screen to prepare thick graphene heat dissipation film, and this method preparation process is simple, efficient, easy to operate, while satisfying the requirement of high power heat dissipation, solves the problem of preparing thick graphene film Problems with high process complexity and difficulty

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing thick graphene heat dissipation film by using silk screen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In this embodiment, the method for preparing a thick graphene heat dissipation film using a screen is as follows:

[0043] Disperse graphite oxide in a solution of deionized water and absolute ethanol, the ratio of the two is 9:1 or 4:1, and carry out vacuum treatment for 20 minutes, the vacuum degree is -1bar, and the air bubbles are discharged to obtain uniform oxidation. Graphene slurry, the mass fraction of graphene oxide in the slurry is 3%.

[0044] Pour the graphene oxide slurry into the screen frame for coating. The screen frame uses 1000-mesh nylon cloth as the base, and the size of the screen frame is 300×400mm; The coating angle is 60°C, the coating speed of the scraper is 2m / min; the coating thickness is 40mm; the screen frame is placed in a blast oven to dry the graphene oxide film, and the water is drained. For heavy objects, the oven temperature is 80°C, the drying time is 24h, and then the graphene oxide film is peeled off.

[0045] Put the graphene ox...

Embodiment 2

[0047] In this embodiment, the method for preparing a thick graphene heat dissipation film by screen printing is as follows:

[0048]Graphite oxide was dispersed in NMP, and vacuum treatment was carried out for 50 minutes with a vacuum degree of -0.8 bar to discharge air bubbles to obtain a uniform graphene oxide slurry with a mass fraction of graphene oxide in the slurry of 7%.

[0049] Pour the graphene oxide slurry into the screen frame for coating. The screen frame uses 1000-mesh nylon cloth as the base, and the size of the screen frame is 200×300mm; The coating angle is 60°C, the coating speed of the scraper is 2m / min; the coating thickness is 30mm; the screen frame is placed in a blast oven to dry the graphene oxide film, and the water is drained. For heavy objects, the oven temperature is 200°C, the drying time is 16 hours, and then the graphene oxide film is peeled off.

[0050] Put the graphene oxide film into a vacuum furnace for carbonization treatment. The tempera...

Embodiment 3

[0052] In this embodiment, the method for preparing a thick graphene heat dissipation film by screen printing is as follows:

[0053] Graphite oxide was dispersed in deionized water, and vacuum treatment was carried out for 60 minutes, the vacuum degree was -1 bar, and air bubbles were discharged to obtain a uniform graphene oxide slurry. The mass fraction of graphene oxide in the slurry was 4%.

[0054] Pour the graphene oxide slurry into the screen frame for coating. The screen frame uses 800-mesh nylon cloth as the base, and the size of the screen frame is 300×500mm; The scraping angle is 45°C, the coating speed of the scraper is 5m / min; the coating thickness is 50mm; the screen frame is placed in a blast oven to dry the graphene oxide film, and the water is drained. For any heavy objects, the oven temperature is 100°C, the drying time is 48h, and then the graphene oxide film is peeled off.

[0055] Put the graphene oxide film into a vacuum furnace for carbonization treatm...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of graphene film preparation, and particularly discloses a method for preparing a thick graphene heat dissipation film by using a silk screen. The method comprises the following steps: (1) dispersing graphite oxide by using a polar solvent to obtain uniform graphene oxide slurry; (2) vacuumizing and defoaming the graphene oxide slurry liquid in the step(1); (3) pouring the graphene oxide slurry obtained in the step (2) into a silk screen frame, taking a silk screen in the silk screen frame as a coating substrate, performing coating by adopting a scraper, and controlling the thickness of the graphene oxide film by adjusting the height of the scraper; (4) drying the silk screen frame loaded with the graphene oxide film obtained in the step (3); and (5) stripping the graphene oxide film obtained in the step (4) from the silk screen frame, and performing carbonization, graphitization and calendering on the graphene oxide film in sequence to obtain the thick graphene heat dissipation film. The method is simpler to operate, low in energy consumption and easy for batch production, and can directly prepare the thick graphene film.

Description

technical field [0001] The invention relates to the technical field of graphene film production, and specifically discloses a method for preparing a thick graphene heat dissipation film by using a silk screen. Background technique [0002] With the continuous innovation of smart electronic devices such as smart phones, portable notebook computers, and smart VR wearable devices, the diversification of functions is accompanied by the continuous increase of high power. As a result, electronic equipment generates and accumulates a large amount of heat when it is running, and the intuitive experience of consumers is that the running speed slows down and heats up, which brings an extremely uncomfortable experience. Traditional heat dissipation film materials such as artificially synthesized graphite films have a thickness of 17 μm, 25 μm, and 32 μm. The thickness is limited, and the heat transfer is limited. It is difficult to meet the requirements of high-power heat dissipation. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C01B32/198H05K7/20
CPCC01B32/184C01B32/198H05K7/2039C01B2204/24C01B2204/26C01B2204/32C01B2204/20
Inventor 吴召洪周中期
Owner STONEPLUS THERMAL MANAGEMENT TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com