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

A kind of ultra-high thermal conductivity graphene thick film and preparation method thereof

A heat-conducting graphite and graphene technology, applied in the direction of graphene, chemical instruments and methods, nano-carbon, etc., can solve the problem of poor thermal conductivity of graphene thick film, unstable two-dimensional planar structure, and inability to guarantee the consistency and consistency of graphene sheets. Problems such as close arrangement, to overcome structural collapse, close arrangement and avoid energy consumption

Active Publication Date: 2021-11-02
福建永安市永清石墨烯研究院有限公司 +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the protonated graphene oxide, due to its single-layer atomic structure and the surface modified by oxygen-containing functional groups, its two-dimensional planar structure becomes extremely unstable after being separated from the dispersion system, and it will shrink in water so that the two The two-dimensional planar structure collapses, and the direct film formation will not ensure the consistent and close arrangement of the graphene sheet orientation, resulting in the final graphene thick film layer is not a well-assembled large graphene film, but a large number of graphene in different sheets Due to the phonon scattering at the interface, the thermal conductivity of the graphene thick film is extremely poor

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
  • A kind of ultra-high thermal conductivity graphene thick film and preparation method thereof
  • A kind of ultra-high thermal conductivity graphene thick film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) After washing the oxide ink of C / O = 1.67 of the solid content of 44.6%, after deionized water, diluted with deionized water to the graphite concentration of 10 mg / ml, take 200ml mixed liquid, 12 hours The water bath is ultrasonically stirred at a rate of 300r / min.

[0032] (2) Press HCl and NH in HCl solution to mass fraction. 4 The amount ratio of the CL substance is 1:23 to add NH 4 CL powder, configure HCl and NH 4 CL mixed solution, add HCl and NH to the oxide oxide hydrocene 4 The mixed solution of Cl is reduced to 1 to 1, and stirred at a rotational speed of 300 r / min for 30 minutes.

[0033] (3) Anhydrous ethanol is added to the oxide in grapiene slurry, and anhydrous ethanol is added in accordance with the proportion of ethanol volume ratio 1: 4, and stirred at a rotational speed of 300 r / min for 30 minutes.

[0034] (4) After the bottom of the rectangle of 8 cm * 8cm is sealed, the oxidized grapite slurry is poured into the mold along the mold wall, ...

Embodiment 2

[0038] (1) After washing the oxide ink of C / O = 1.67 of 44.6% by deionized water to neutral, diluted with deionized water to the graphite concentration of 10 mg / ml, take 400 ml of mixed liquid, 12 hours The water bath is ultrasonically stirred at a rate of 300r / min.

[0039] (2) Press HCl and NH in HCl solution to mass fraction. 4 The amount ratio of the CL substance is 1:23 to add NH 4 CL powder, configure HCl and NH 4 CL mixed solution, add HCl and NH to the oxide oxide hydrocene 4 The mixed solution of Cl is reduced to 1 to 1, and stirred at a rotational speed of 300 r / min for 30 minutes.

[0040] (3) Anhydrous ethanol is added to the oxide in grapiene slurry, and anhydrous ethanol is added in accordance with the proportion of ethanol volume ratio 1: 4, and stirred at a rotational speed of 300 r / min for 30 minutes.

[0041] (4) After the bottom of the rectangle of 5 cm * 5cm is sealed in the bottom of the mold of 5 cm * 5cm, the oxide ink alkylene slurry is poured int...

Embodiment 3

[0045] (1) After washing the oxide ink of C / O = 1.67 with a solid content of 44.6%, after deionized water, diluted with deionized water to a graphite concentration of 10 mg / ml, take 600 ml of mixed liquid, 12 hours The water bath is ultrasonically stirred at a rate of 300r / min.

[0046] (2) Press HCl and NH in HCl solution to mass fraction. 4 The amount ratio of the CL substance is 1:23 to add NH 4 CL powder, configure HCl and NH 4 CL mixed solution, add HCl and NH to the oxide oxide hydrocene 4 The mixed solution of Cl is reduced to 1 to 1, and stirred at a rotational speed of 300 r / min for 30 minutes.

[0047] (3) Anhydrous ethanol is added to the oxide in grapiene slurry, and anhydrous ethanol is added in accordance with the proportion of ethanol volume ratio 1: 4, and stirred at a rotational speed of 300 r / min for 30 minutes.

[0048] (4) After the bottom of the rectangle of 5 cm * 5cm is sealed in the bottom of the mold of 5 cm * 5cm, the oxide ink alkylene slurry i...

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
electrical resistivityaaaaaaaaaa
thicknessaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a graphene thick film with ultrahigh thermal conductivity along the plane direction and a preparation method thereof. In the present invention, the graphene oxide hydrosol is first used to protonate the graphene oxide under acidic conditions, and then the liquid surface can be adjusted to achieve orientation arrangement and film formation, and then the ultra-high thermal conductivity graphene thick film is obtained through reduction. The method can greatly shorten the preparation period of the graphene thick film material, improve production efficiency, and save production energy consumption and cost. The ultra-high thermal conductivity graphene thick film of the present invention has a thickness of 50 μm to 300 μm and a density of 1.7-2.1g / cm 3 , thermal conductivity greater than 1500W / mK.

Description

Technical field [0001] The present invention belongs to the field of thermally conductive material, particularly relates to an ultra-high thermal conductivity of graphene thick their preparation. Background technique [0002] Graphene is closely spaced by a sp2 hybridized carbon atoms from single crystal honeycomb structure, the thermal conductivity at room temperature up graphene 5000W / mK, 10 times higher than the thermal conductivity of the copper at room temperature, and a high the diamond and carbon nanotubes, is currently recognized human materials with the highest thermal conductivity. [0003] Preparation of thermally conductive graphene current industrial film material, mostly using graphene oxide film as a precursor, heat treatment or chemical reduction after the manner of graphene film is obtained. And the final product performance consistency orientation and structure of graphene oxide precursor and arrangement of the degree of densification is associated, in order t...

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 Patents(China)
IPC IPC(8): C01B32/19C01B32/194
CPCC01B2204/24C01B32/19C01B32/194
Inventor 陈威麦键彬罗冲杜鸿达
Owner 福建永安市永清石墨烯研究院有限公司
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