Method for preparing graphene aerogel and application thereof

A graphene aerogel, graphene hydrogel technology, applied in graphene, chemical instruments and methods, inorganic chemistry and other directions, can solve the problems of improving the difficulty of graphene aerogel production, high production cost, and high technical requirements , to achieve the effect of improving electrical conductivity and mechanical properties, easy control, and wide source of raw materials

Active Publication Date: 2016-11-09
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are many ways to make graphene airgel, but the traditional method has high production cost, high technical requirements for production, and is not easy to control, which increases the difficulty of making graphene aerogel. Therefore, for the production of graphene aerogel The production method needs further research to improve

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  • Method for preparing graphene aerogel and application thereof
  • Method for preparing graphene aerogel and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of preparation method of graphene airgel, concrete steps are:

[0038] The first step: preparation of graphene oxide dispersion: using the method of exfoliating graphite oxide, specifically: first mix 5g of natural flake graphite, 3g of sodium nitrate and 120mL of concentrated sulfuric acid at 5°C, slowly add 15g of potassium permanganate , stirred at 35°C for 6h, diluted with 500mL deionized water, added 15mL of 30% hydrogen peroxide, ultrasonicated for 0.5h, poured off the supernatant after standing for 1 day, dialyzed for 7 days, centrifuged at 2000rpm to take the supernatant to obtain a uniformly dispersed graphene oxide dispersion liquid;

[0039] The second step is to prepare the graphene oxide mixed solution: uniformly disperse diaminodiphenylmethane in the graphene oxide dispersion to obtain the graphene oxide mixed solution, wherein the mass ratio of graphene oxide to diaminodiphenylmethane is 1:10, the graphene oxide concentration in the resulting mixe...

Embodiment 2

[0045] A kind of preparation method of graphene airgel, concrete steps are:

[0046] First, prepare the graphene oxide dispersion: using the exfoliated graphite oxide method, first mix 5g of natural flake graphite, 3g of sodium nitrate and 120mL of concentrated sulfuric acid at 4°C, add 15g of potassium permanganate, add slowly, and stir at 40°C for 6h After diluting with 500mL deionized water, add 15mL of 30% hydrogen peroxide, sonicate for 0.5h, pour off the supernatant after standing for 1 day, dialyze for 9 days, centrifuge at 3000rpm to take the upper liquid to obtain a uniformly dispersed graphene oxide dispersion;

[0047] Second, configure the graphene oxide mixed solution: uniformly disperse diaminodiphenylmethane into the graphene oxide dispersion, wherein the mass ratio of graphene oxide to diaminodiphenylmethane is 1:40, and in the resulting mixed solution Graphene oxide concentration is 4mg / mL;

[0048] Third, inject the graphene oxide mixture into the sample bot...

Embodiment 3

[0053] A kind of preparation method of graphene airgel, concrete steps are:

[0054] First, prepare the graphene oxide dispersion: using the exfoliated graphite oxide method, first mix 5g of natural flake graphite, 3g of sodium nitrate and 120mL of concentrated sulfuric acid at 3°C, add 15g of potassium permanganate, add slowly, and stir at 35°C for 6h After diluting with 500mL deionized water, add 15mL of 30% hydrogen peroxide, sonicate for 0.5h, pour off the supernatant after standing for 1 day, dialyze for 10 days, centrifuge at 4000rpm to take the supernatant to obtain a uniformly dispersed graphene oxide dispersion;

[0055] Second, configure the graphene oxide mixed solution: uniformly disperse diaminodiphenylmethane into the graphene oxide dispersion, wherein the mass ratio of graphene oxide to diaminodiphenylmethane is 1:60, and in the resulting mixed solution Graphene oxide concentration is 6mg / mL;

[0056] Third, inject the graphene oxide mixture into the sample bot...

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Abstract

The invention discloses a method for preparing graphene aerogel and application thereof, and relates to the technical field of graphene materials. The method includes steps of uniformly mixing graphene oxide dispersion liquid and amine curing agents with one another to obtain graphene oxide mixed liquid; hermetically heating the obtained graphene oxide mixed liquid to obtain the graphene aerogel. The amine curing agents are one type of or a plurality of types of diaminodiphenyl-methane, diamino diphenyl sulfone, diethylenetriamine, triethylenetetramine, diethylaminopropylamine and m-phenylenediamine. The graphene aerogel prepared by the aid of the method can be applied to epoxy resin, so that graphene aerogel/epoxy resin composite materials with high conductivity and excellent mechanical properties can be obtained. The method and the application have the advantages that the graphene aerogel prepared by the aid of the method is internally of a uniform macroporous structure and is high in porosity; the amine curing agents are adopted in preparation procedures, accordingly, the epoxy resin interface bonding can be improved, and the conductivity and the mechanical properties of the epoxy resin can be enhanced.

Description

technical field [0001] The invention belongs to the technical field of graphene airgel, in particular to a preparation method and application of graphene airgel. Background technique [0002] Graphene is both the thinnest material and the strongest, with a breaking strength 200 times stronger than steel. At the same time, it has good elasticity, and the stretching range can reach 20% of its own size. The most potential application of graphene at present is to become a substitute for silicon, to manufacture ultra-miniature transistors, and to produce future supercomputers. By replacing silicon with graphene, computer processors could run hundreds of times faster. [0003] Graphene is a new type of carbon material with a two-dimensional honeycomb structure. It has high mechanical strength, elasticity, thermal conductivity, electrical conductivity, and quantum Hall effect. It has attracted extensive attention from academia and industry in recent years. Graphene as a nanopart...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C08K7/24C08L63/00
CPCC01B2204/20C01P2004/03C01P2006/10C01P2006/16C08K7/24C08L63/00
Inventor 隋刚王峰杨小平
Owner BEIJING UNIV OF CHEM TECH
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