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Preparation method of foam graphene

A technology of foamed graphene and graphene, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of high cost, difficulty in dispersing two-dimensional graphene, and low yield, and achieve The effect of low cost, simple preparation process and high yield

Active Publication Date: 2015-06-03
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the difficulties that two-dimensional graphene is difficult to disperse, and the existing graphene production process has high cost and low yield, the purpose of the present invention is to provide a method for preparing foamed graphene to broaden its application in the field of adsorption catalysis. application, the preparation process is simple, the cost is low, the yield is high and the characteristics of easy structure regulation can be used for large-scale industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Mix 1g of graphite oxide and 200ml of ethanol, and ultrasonically disperse to obtain a uniformly dispersed suspension; under stirring conditions, add 80ml of ethanol solution containing 8g of hexamethylenediamine, and then 2 Under protection, reflux reaction was carried out for 12 hours, and the reaction temperature was 80° C.; finally, cooling, suction filtration, washing, and drying were carried out to obtain graphene with surface amino modification treatment.

[0028] (2) Dissolve 0.47g of PVP in 48g of ethanol and add it to a four-necked reaction flask. Under nitrogen atmosphere, heat the water bath to 72 o C, then add 16g of monomers, 0.16g of AIBN to initiate polymerization, keep warm and stir for 10h to obtain a suspension with carboxyl polymer microspheres on the surface. The monomers used in this step are St and HAc, and the mass ratio of the two is 1:8%.

[0029] (3) Take 1.6g of the surface-treated graphite oxide prepared in step (1) and disperse it in 3...

Embodiment 2

[0033] (1) Mix 1g of graphite oxide and 200ml of ethanol, and ultrasonically disperse to obtain a uniformly dispersed suspension; under stirring conditions, add 80ml of ethanol solution containing 8g of p-phenylenediamine, and then 2 Under protection, reflux reaction was carried out for 12 hours, and the reaction temperature was 80° C.; finally, cooling, suction filtration, washing, and drying were carried out to obtain graphene treated with amino groups on the surface.

[0034] (2) Dissolve 0.8g of PVP in 48g of ethanol and add it into a four-necked reaction flask. Under nitrogen atmosphere, heat the water bath to 72 o C, then add 16g of monomers, 0.08g of AIBN to initiate polymerization, keep stirring and react for 10h, and obtain a suspension with carboxyl polymer microspheres on the surface. The monomers used in this step are St and HAc, and the mass ratio of the two is 1:8%.

[0035] (3) Disperse 3.2g of the surface-treated graphite oxide prepared in step (1) in 640ml of...

Embodiment 3

[0039] (1) Mix 1g of graphite oxide and 200ml of ethanol, and ultrasonically disperse to obtain a uniformly dispersed suspension; under stirring conditions, add 80ml of ethanol solution containing 16g of diaminodiphenylmethane, and then 2 Under protection, reflux reaction was carried out for 12 hours, and the reaction temperature was 80° C.; finally, cooling, suction filtration, washing, and drying were carried out to obtain graphene treated with amino groups on the surface.

[0040] (2) Dissolve 0.64g of polyvinyl alcohol in 49g of ethanol and add it into a four-necked reaction flask. Under nitrogen atmosphere, heat the water bath to 72 o C, then add 21g of monomers, 0.315g of AIBN to initiate polymerization, keep stirring and react for 10h, and obtain a suspension with epoxy-based polymer microspheres on the surface. The monomers used in this step are St and GMA, and the mass ratio of the two is 1:12%.

[0041] (3) Take 3.15g of the surface-treated graphite oxide prepared i...

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Abstract

The invention discloses a preparation method of foam graphene, which comprises the following steps: (1) reacting graphene oxide with diamine or dimercapto compounds to prepare surface-amino / mercapto-treated graphene oxide; (2) synthesizing a microsphere of a polymer with carboxyl or epoxy group on the surface as a polymer template; (3) adding the surface-functionalized graphite oxide solution into the microsphere suspension, and preparing the core-shell-structure polymer-graphene oxide composite microsphere under the action of chemical covalent bond; and (4) calcining the prepared microsphere at high temperature to obtain the foam graphene. The foam graphene has the advantages of low density, high porosity (controllable pore size), large specific area and low cost. Due to the special hollow foam structure and large specific area of the graphene, the graphene has wide application prospects in the field of adsorption catalysis and particularly in the aspect of harm reduction and tar reduction of cigarettes.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a method for preparing foamed graphene. Background technique [0002] Graphene is composed of a single layer of carbon atoms using SP 2 The carbonaceous material of the two-dimensional honeycomb crystal lattice formed by hybridization stacking has excellent properties such as high mechanical strength and thermal conductivity, peculiar electrical properties and optical properties due to its special structure. In addition to the above properties, graphene also has unique p-bond conjugate adsorption and chemical catalytic activity. The discoverers of graphene, Andre Geim and Kostya Novoselov, won the Nobel Prize in Physics in 2010. The root of the award is that graphene has extremely broad application prospects in many aspects such as adsorption and catalysis. [0003] The two-dimensional structure of graphene makes it easy to agglomerate, and it is difficult to e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y30/00B82Y40/00
Inventor 杨桂生汪丽娟
Owner HEFEI GENIUS NEW MATERIALS