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Three-dimensional macroscale graphene and preparation method thereof

A graphene macroscopic body and graphene technology, applied in the field of graphene, can solve the problems of poor mechanical strength, fragile graphene foam, and limit the application of graphene foam, so as to achieve the effect of improving mechanical strength and enhancing mechanical strength

Active Publication Date: 2015-07-01
NINGBO GRAPHENE INNOVATION CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the graphene foam prepared by the above method is fragile and has poor mechanical strength, which limits the application of graphene foam

Method used

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  • Three-dimensional macroscale graphene and preparation method thereof
  • Three-dimensional macroscale graphene and preparation method thereof
  • Three-dimensional macroscale graphene and preparation method thereof

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preparation example Construction

[0036] The present invention also provides a kind of preparation method of above-mentioned three-dimensional graphene macrobody, comprises the following steps:

[0037] Mix the graphene aqueous dispersion, carbon nanotubes and carbon fibers, acrylamide monomers, cross-linking agents and initiators evenly, then heat and react to obtain a reaction slurry, and freeze-dry the reaction slurry to obtain three-dimensional graphene macro body.

[0038] Before mixing the raw materials, the present invention preferably oxidizes the carbon nanotubes and carbon fibers respectively, and the present invention has no special limitation on the oxidation treatment method. The oxidation treatment of carbon nanotubes and The oxidation treatment method of carbon fiber can be used.

[0039] In the present invention, the oxidation treatment of carbon nanotubes can adopt the following method:

[0040] Concentrated sulfuric acid with a concentration of 98wt% and concentrated nitric acid with a conc...

Embodiment 1

[0058] Concentrated sulfuric acid with a concentration of 98wt% and concentrated nitric acid with a concentration of 68wt% were prepared into a mixed acid according to a volume ratio of 3:1, and then carbon nanotubes were added to the mixed acid, and reacted at 50°C for 20h to obtain oxidized carbon nanotubes .

Embodiment 2

[0060] Concentrated sulfuric acid with a concentration of 98wt% and concentrated nitric acid with a concentration of 68wt% were prepared into a mixed acid according to a volume ratio of 3:1, and then carbon nanotubes were added to the mixed acid, and reacted at 70 ° C for 12 hours to obtain oxidized carbon nanotubes .

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Abstract

The invention provides tree-dimensional macroscale graphene, comprising graphene, carbon nano tubes, carbon fibers and a cross-linking polymer. According to tree-dimensional macroscale graphene, graphene is used as a main material, and the carbon nano tubes are attached to graphene; meanwhile, the carbon fibers intersperse in the whole tree-dimensional macroscale graphene to play a supporting role, thereby increasing the strength of the tree-dimensional macroscale graphene; the cross-linking polymer is used for further forming a network structure among graphene, the carbon nano tubes and the carbon fibers to form an anchoring effect, thus further enhancing the mechanical strength of the tree-dimensional macroscale graphene.

Description

technical field [0001] The invention belongs to the technical field of graphene, and in particular relates to a three-dimensional graphene macrobody and a preparation method thereof. Background technique [0002] Graphene is a carbon atom with sp 2 The hybridized orbitals form a hexagonal planar film with a honeycomb lattice, a two-dimensional material with a thickness of only one carbon atom. Since its discovery in 2004, this unique material has attracted widespread attention due to its multiple excellent properties. Thanks to its good mechanical and electrical properties, three-dimensional macroscopic materials based on two-dimensional graphene materials also have broad application prospects. The graphene foam material obtained by the assembly of two-dimensional graphene has a large specific surface area and good thermal and electrical conductivity. It is used in controllable gas-permeable membranes, anisotropic ion conductors, supercapacitors, lithium-ion batteries, en...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/182
Inventor 蒋蓉蓉周旭峰刘兆平
Owner NINGBO GRAPHENE INNOVATION CENT CO LTD