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Preparation method of stable graphene colloid

A technology of graphene and colloid, applied in the field of preparation of graphene stable colloid, which can solve the problems of easy precipitation, easy agglomeration of graphene, unfavorable graphene application, etc., and achieve the effect of simple preparation method and easy availability of raw materials

Active Publication Date: 2017-08-11
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Abstract
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  • Application Information

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Problems solved by technology

[0002] Graphene has many specific properties and has broad application prospects in nanoelectronics, sensors, batteries, capacitors, nanocomposites, hydrogen storage and other fields, but graphene itself is easy to agglomerate, which is not conducive to the application of graphene in many aspects. Therefore, stable dispersed graphene is of great significance for the practical application of graphene.
At present, the main method of preparing graphene dispersion is to obtain graphene oxide dispersion from graphene oxide, and then reduce graphene oxide to obtain graphene dispersion. The graphene dispersed liquid crystal obtained by this method has defects and poor conductivity.
Another method for preparing graphene dispersions is to obtain graphene dispersions by ultrasonication of common surfactants and graphite powder. The concentration of graphene dispersions obtained in this way is very low, and most of them are unstable and easy to precipitate. Not conducive to the practical application of graphene

Method used

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  • Preparation method of stable graphene colloid
  • Preparation method of stable graphene colloid
  • Preparation method of stable graphene colloid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Ultrasonicate 5g of graphite powder, 0.3g of carbon quantum dots, 15g of 3-[3-(cholamidopropyl)dimethylamino]propanesulfonic acid inner salt, 10g of polytetrafluoroethylene, and 15g of polystyrene emulsion in 500mL of ethanol Disperse for 30 minutes, and then shear at high speed for 3 hours to obtain a stable graphene colloid.

Embodiment 2

[0029] 1g of graphite powder, 3g of graphene oxide nanoparticles, 25g of n-hexadecyl-β-D-maltoside, and 10g of polyethylene glycol were ultrasonically dispersed in 150mL DMF for 30 minutes, then 3g of polyacrylic acid emulsion was added, and high-speed shearing After cutting for 3 hours, a stable graphene colloid is obtained.

Embodiment 3

[0031] 10g of graphite powder, 45g of graphene oxide nanoparticles, 500g of n-hexadecyl-β-D-maltoside, and 150g of polyethylene glycol were ultrasonically dispersed in 750mL of water for 2 hours, then 30g of polyacrylic acid emulsion was added, and high-speed shearing After cutting for 3 hours, a stable graphene colloid is obtained.

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Abstract

The invention discloses a preparation method of stable graphene colloid. Inorganic nanoparticles (such as carbon nanometer quantum dot, oxidized graphene, acidified nanotube, and graphene quantum dot) are used, a surfactant (such as 3-[3-cholamidopropyl)dimethylammonium]-1-propanesulfonate, dihexadecyldimethylammonium bromide, cetyl dimethyl benzyl ammonium bromide, n-hexadecyl-beta-D-maltoside, and a polymer (octadecanol ethylene oxide polyether, cellulose nanometer crystal) and one or several kinds of additives are assisted; high speed mixing and shearing, ultrasonic exfoliation and dispersion of graphite or graphene are carried out, in order to obtain long-term stable graphene colloid. The method is simple, the graphene colloid is long-term stable, the graphene colloid can be divided into water-soluble colloid and oil soluble colloid, in order to facilitate practical application of graphene. After pumping filtration of the graphene colloid is carried out and film is formed, the film is hopeful to be used as a graphene electrode, a graphene composite material, a graphene coating, and a graphene fiber composite material.

Description

technical field [0001] The invention belongs to the field of graphene materials, in particular to a method for preparing a graphene stable colloid. Background technique [0002] Graphene has many specific properties and has broad application prospects in nanoelectronics, sensors, batteries, capacitors, nanocomposites, hydrogen storage and other fields, but graphene itself is easy to agglomerate, which is not conducive to the application of graphene in many aspects. Therefore, stable dispersed graphene is of great significance for the practical application of graphene. At present, the main method of preparing graphene dispersion is to obtain graphene oxide dispersion from graphene oxide, and then reduce graphene oxide to obtain graphene dispersion. The graphene dispersion liquid crystal obtained by this method has defects and poor conductivity. Another method for preparing graphene dispersions is to obtain graphene dispersions by ultrasonication of common surfactants and gra...

Claims

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Application Information

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IPC IPC(8): C08L25/06C08L27/18C08L33/00C08L71/02C08L79/02C08L53/02C08L39/06C08L81/04C08K3/04C08K7/24
CPCC08K3/04C08K2201/001C08K2201/011C08K2201/014C08L25/06C08L33/00C08L71/02C08L27/18C08L79/02C08K7/24C08L53/02C08L39/06C08L81/04
Inventor 杨应奎邱胜强李冉张爱清
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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