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Preparation method of oriented graphene composite macroscopic body

A graphene composite and macro-body technology, applied in the field of composite materials, can solve the problems of high cost, long time consumption, lack of simple operation, low cost, etc., and achieve the effects of reducing preparation cost, simplifying preparation process, and simplifying process

Inactive Publication Date: 2021-02-12
SHENZHEN STRONG ADVANCED MATERIALS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Graphene oriented aerogels can usually be induced by ice template method, but this process is time-consuming and expensive
The existing methods for preparing graphene-oriented composite aerogels lack a method that is simple to operate, low in cost, and capable of preparing large-area composite aerogels

Method used

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  • Preparation method of oriented graphene composite macroscopic body
  • Preparation method of oriented graphene composite macroscopic body
  • Preparation method of oriented graphene composite macroscopic body

Examples

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Embodiment 1

[0050] The present embodiment provides a method for preparing directionally reduced graphene oxide / graphene oxide nanoribbon composite airgel based on sol-gel method and freeze-drying method, the method comprising the following steps:

[0051] Step 1, prepare graphene oxide dispersion liquid:

[0052] Preparation of graphene oxide dispersion by chemical method: Weigh 4g of flake graphite and place it in a beaker, pour 450ml of concentrated sulfuric acid and 50ml of phosphoric acid into the beaker to prepare mixed solution I, and stir mixed solution I at room temperature for 40min; Add 18g of potassium permanganate to the mixed solution I in 8 times to obtain the mixed solution II, heat the mixed solution II in a constant temperature water bath at 70°C, stir for 16 hours, take it out, and cool it to room temperature; slowly pour the mixed solution II into the previously prepared solution 700ml of hydrogen peroxide mixed with ice water, let stand for 24h, filter off the supernat...

Embodiment 2

[0063] The present embodiment provides a method for preparing directionally reduced graphene oxide / graphene oxide nanoribbon composite airgel based on sol-gel method and freeze-drying method, the method comprising the following steps:

[0064] Step 1, prepare graphene oxide dispersion liquid:

[0065] Preparation of graphene oxide dispersion by chemical method: Weigh 4g of flake graphite and place it in a beaker, pour 450ml of concentrated sulfuric acid and 50ml of phosphoric acid into the beaker to prepare mixed solution I, and stir mixed solution I at room temperature for 40min; Add 18g of potassium permanganate to the mixed solution I in 8 times to obtain the mixed solution II, heat the mixed solution II in a constant temperature water bath at 70°C, stir for 16 hours, take it out, and cool it to room temperature; slowly pour the mixed solution II into the previously prepared solution 700ml of hydrogen peroxide mixed with ice water, let stand for 24h, filter off the supernat...

Embodiment 3

[0076] The present embodiment provides a method for preparing directionally reduced graphene oxide / graphene oxide nanoribbon composite airgel based on sol-gel method and freeze-drying method, the method comprising the following steps:

[0077] Step 1, prepare graphene oxide dispersion liquid:

[0078]Preparation of graphene oxide dispersion by chemical method: Weigh 4g of flake graphite and place it in a beaker, pour 450ml of concentrated sulfuric acid and 50ml of phosphoric acid into the beaker to prepare mixed solution I, and stir mixed solution I at room temperature for 40min; Add 18g of potassium permanganate to the mixed solution I in 8 times to obtain the mixed solution II, heat the mixed solution II in a constant temperature water bath at 70°C, stir for 16 hours, take it out, and cool it to room temperature; slowly pour the mixed solution II into the previously prepared solution 700ml of hydrogen peroxide mixed with ice water, let stand for 24h, filter off the supernata...

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Abstract

The invention discloses a preparation method of an oriented graphene composite macroscopic body. The preparation method comprises the following steps: in order to realize the oriented arrangement of graphene lamellas, introducing graphene nanoribbons to reduce the lamellar accumulation effect, carrying out pre-reduction by using a green reducing agent, and forming a vertical structure by using thepre-reduced graphene hydrosol under the action of temperature gradient, in subsequent operations, maintaining the original vertical structure compression and further reducing the lamellar spacing. The graphene / graphene nanobelt composite aerogel with a directional structure is prepared by combining a sol-gel method and a freeze-drying method, the preparation process of the graphene aerogel is simplified, the preparation cost is reduced, the aerogel is compounded with a polymer, the mechanical, thermal and electrical properties of the composite material are improved, and the method can be widely applied to the fields of aerospace, electronic equipment and the like.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a method for preparing an oriented graphene composite macrobody, in particular to a method for preparing a two-dimensional nanomaterial macrobody based on a sol-gel method and a freeze-drying method. Background technique [0002] Graphene is a two-dimensional crystal with a thickness of one atom, and the carbon atoms are sp 2 The hybrid orbitals form a hexagonal dense honeycomb structure. This two-dimensional carbon nanomaterial with excellent properties was first separated from graphite by the physicists Andre Geim and Konstantin Novoselov of the University of Manchester in the United Kingdom. Received the 2010 Nobel Prize in Physics. The unique properties of graphene come from its special structure. Graphene is bonded by two equivalent carbon atom sublattices, and each C atom in the lattice has a p orbital, which contributes to the delocalization Electronic network...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/19C01B32/194C04B38/00C08K7/24C08L63/00
CPCC01B32/19C01B32/194C04B38/0045C08K7/24C08L63/00
Inventor 李宜彬程远静赫晓东杜善义
Owner SHENZHEN STRONG ADVANCED MATERIALS RES INST CO LTD
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