Oriented assembled graphene, graphene-carbon nanotube composite heat conduction film and preparation method thereof

A carbon nanotube composite and carbon nanotube technology, applied in the direction of carbon nanotubes, graphene, nanocarbon, etc., can solve the problems of non-adjustable product thickness, low thermal conductivity, high production cost, etc., and achieve high phase compatibility and ultra-high Thermal conductivity, low cost effect

Active Publication Date: 2021-10-08
NINGBO GRAPHENE INNOVATION CENT CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a new type of heat-conducting film preparation technology for the shortcomings and deficiencies of the existing heat-conducting film, such as high production cost, low thermal conductivity, poor flexibility, and non-adjustable product thickness.

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
  • Oriented assembled graphene, graphene-carbon nanotube composite heat conduction film and preparation method thereof
  • Oriented assembled graphene, graphene-carbon nanotube composite heat conduction film and preparation method thereof
  • Oriented assembled graphene, graphene-carbon nanotube composite heat conduction film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The three-dimensional space overlapping technology of porous graphene: mix graphene oxide: water mass ratio 1:10 evenly, add copper acetate, the mass ratio of copper acetate and graphene oxide solution is 1:100, and mix evenly. The mixed liquid is cooled slowly until the water molecules crystallize into ice, and then moved to a freeze dryer for freeze-drying. The drying temperature is -50°C and the drying time is 24 hours. By controlling the freezing rate, a three-dimensional layered oxidation with parallel layers can be obtained. Graphene, in which copper is evenly distributed between graphene layers. The three-dimensional layered graphene was reduced in a hydrogen atmosphere, the reduction temperature was 300°C, and the reduction time was 2 hours, to obtain copper nanoparticles@three-dimensional layered graphene. Depend on figure 1 It can be seen that the copper nanoparticles are riveted in the layered graphene, and the distance between graphene layers is about 0.05 ...

Embodiment 2

[0067] The three-dimensional space overlapping technology of porous graphene: mix graphene oxide: water mass ratio 1:20 evenly, add copper acetate, the mass ratio of copper acetate and graphene oxide solution is 1:200, and mix evenly. The mixed liquid is cooled slowly until the water molecules crystallize into ice, and then moved to a freeze dryer for freeze-drying. The drying temperature is -50°C and the drying time is 24 hours. By controlling the freezing rate, a three-dimensional layered oxidation with parallel layers can be obtained. Graphene, in which copper is evenly distributed between graphene layers. The three-dimensional layered graphene is reduced in a hydrogen atmosphere, the reduction temperature is 400 ° C, and the reduction time is 2 hours to obtain copper nanoparticles@three-dimensional layered graphene, in which the copper nanoparticles are riveted in the layered graphene, and the graphene layer The pitch is about 0.1 μm.

[0068] In this embodiment, "slowly ...

Embodiment 3

[0072] The three-dimensional space overlapping technology of porous graphene: mix graphene oxide: water mass ratio 1:10 evenly, add ferric chloride, the mass ratio of ferric chloride and graphene oxide solution is 1:100, and mix evenly. The mixed liquid is cooled slowly until the water molecules crystallize into ice, and then moved to a freeze dryer for freeze-drying. The drying temperature is -50°C and the drying time is 24 hours. By controlling the freezing rate, a three-dimensional layered oxidation with parallel layers can be obtained. Graphene, in which the iron element is evenly distributed between the graphene layers. The three-dimensional layered graphene is reduced in a hydrogen atmosphere, the reduction temperature is 400 ° C, and the reduction time is 2 hours to obtain iron nanoparticles@three-dimensional layered graphene, in which the iron nanoparticles are riveted in the layered graphene, and the graphene layer The pitch is about 0.2 μm.

[0073] In this embodime...

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 a method for preparing oriented assembled graphene, which comprises: mixing an aqueous solution of graphene oxide and a water-soluble metal salt, then slowly cooling down until water molecules crystallize into ice, and then freeze-drying to obtain oriented Graphene oxide is assembled, and after reduction, oriented assembled graphene loaded with metal nanoparticles is obtained. The oriented assembled graphene has a three-dimensional layered structure in which layers are arranged in parallel, and interlayer gaps exist between the layers, and metal nanoparticles are riveted in the three-dimensional layered structure of the oriented assembled graphene. The present application also relates to directionally assembled graphene prepared by the method described above. The present application also relates to a graphene-carbon nanotube composite heat-conducting film prepared by using the above-mentioned directional assembled graphene and a preparation method thereof. The composite thermal conductive film described in this paper has the advantages of low cost, high phase orientation of graphene, ultra-high thermal conductivity, and controllable thickness of ultra-high flexibility products. The vertical thermal conductivity can reach up to about 100W / (m·K).

Description

technical field [0001] The invention relates to the technical field of graphene and graphene composite materials. Specifically, the present application relates to an oriented assembled graphene, a preparation method of the oriented assembled graphene, a graphene-carbon nanotube composite heat conduction film and a preparation method of the composite heat conduction film. Background technique [0002] In solid materials, phonons and electrons are the key media for heat transfer. The higher metal thermal conductivity mainly depends on the high-concentration electron transfer process, and among all metals, metallic silver has the highest thermal conductivity (K=429W / (m K)), but this thermal conductivity cannot be used in practical applications. Still not ideal. The thermal conductivity of non-metals mainly depends on the propagation rate of phonons. The thermal conductivity of different elements is quite different. At the same time, different lattice arrangements of the same ...

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): C09K5/14C01B32/184C01B32/16
CPCC09K5/14C01B32/16C01B32/184
Inventor 尤勇张慧涛胡黎明郭玉芬刘兆平
Owner NINGBO GRAPHENE INNOVATION CENT CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap