Novel method for preparing high quality graphene material

A technology of graphene and a new method, which is applied in the field of preparing high-quality graphene materials, can solve problems such as large environmental hazards, complicated preparation processes, and strong corrosion, and achieve the effects of reducing costs and improving production efficiency

Active Publication Date: 2016-08-03
阮伟
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, although vapor phase deposition (CVD) and SiC thermal decomposition can meet the requirements of producing high-quality graphene, they have the defects of high cost and complicated process; Coleman et al. J.Am.Chem.Soc. 2009, 131 , 3611–3620) prepared graphene with better properties by ultrasonically treating graphite in a solution of sodium dodecylbenzenesulfonate and water, but the concentration of the obtained graphene dispersion was extremely low (0.002–0.05 g /L), it is difficult to mass-produce on a large scale, so it does not meet the requirements of mass production; oxidation method is currently the most commonly used method for preparing graphene, which is relatively easy to mass-produce and the process is relatively simple, but the physical properties of the obtained graphene However, the performance is greatly damaged by t

Method used

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  • Novel method for preparing high quality graphene material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Water flows through the magnetic field area between multiple NdFeB permanent magnets with a magnetic field strength of 1.1T in a manner perpendicular to the magnetic field direction, so that the surface tension of the water is reduced to 54mN / m and then added to the container.

[0026] (2) Add expanded graphite, natural graphite, polyethylene glycol, quinoline yellow, carmine, sodium citrate and sodium dodecyl diphenyl ether disulfonate into the container of step (1), and use high-speed shear The emulsifier was stirred at a speed of 3500rpm for 3.5 hours to obtain a graphene dispersion. During the process, various raw materials were adjusted or randomly added according to the measured surface tension and viscosity (the raw materials were expanded graphite, natural graphite, polyethylene glycol, quinoline yellow, Carmine, sodium citrate, sodium dodecyl diphenyl ether disulfonate, water), so that the BN parameter of the solution (the value of the BN parameter=the surfa...

Embodiment 2

[0028] (1) Water flows through the magnetic field area between multiple NdFeB permanent magnets with a magnetic field strength of 0.9T in a manner perpendicular to the magnetic field direction, so that the surface tension of the water is reduced to 53mN / m and then added to the container.

[0029] (2) Natural graphite, expanded graphite, polyvinyl alcohol, triethanolamine dodecylbenzenesulfonate, quinoline yellow, sodium dodecyl dinaphthyl ether disulfonate, glycol and dodecyl diphenyl ether Sodium sulfonate is added to the container of step (1), and stirred with a high-speed shear emulsifier at a speed of 3700rpm for 3 hours to obtain a graphene dispersion. During the process, various raw materials (raw materials) are adjusted or randomly added according to the surface tension and viscosity measured. Natural graphite, expanded graphite, polyvinyl alcohol, triethanolamine dodecylbenzenesulfonate, quinoline yellow, sodium dodecyl dinaphthyl ether disulfonate, glycol, dodecyl diph...

Embodiment 3

[0031] (1) Water flows through the magnetic field area between multiple NdFeB permanent magnets with a magnetic field strength of 0.8T in a manner perpendicular to the magnetic field direction, so that the surface tension of the water is reduced to about 55mN / m and then added to the container.

[0032](2) Add natural graphite, expanded graphite, sodium didodecyl diphenyl ether disulfonate, acid red 27, carmine, sodium cetylbenzenesulfonate and propylene glycol into the container of step (1), and use The high-speed shear emulsifier is stirred at a speed of 3800rpm and ultrasonically treated at 100W for 2 hours to obtain a graphene dispersion. During the process, various raw materials are adjusted or randomly added according to the measured surface tension and viscosity (raw materials are natural graphite and expanded graphite. , sodium didodecyl diphenyl ether disulfonate, acid red 27, carmine, sodium cetylbenzenesulfonate, propylene glycol, water), so that the BN parameters of ...

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Abstract

The invention relate to a novel method for preparing a high quality graphene material, and aims to satisfy the massive needs of high quality and low cost graphene. According to the preparation method, physical parameters such as mixed solution surface tension, viscosity, and the like should be maintained in a certain range; in realtime measurement, the surface tension and viscosity can be adjusted at the same time, or various raw materials can be added at random. Shearing and stirring equipment such as shearing emulsifying machine is adopted to shear and stir the raw materials, and then an ultrasonic wave treatment is adopted to obtain graphene dispersion liquid. The obtained graphene has a very large transverse dimension and extremely high concentration, the thickness is within four layers; due to the adopted non-oxidation method, the conductivity of graphene is high; the method is simple, no complicated technology or procedure is used, and the method is suitable for massive industrial production.

Description

technical field [0001] The invention belongs to the technical field of graphene, and in particular relates to a new method for preparing high-quality graphene materials. Background technique [0002] Graphene is a special two-dimensional material composed of carbon atoms. Because of its excellent comprehensive physical properties such as high electrical conductivity, high mechanical strength, large specific surface area, and high thermal conductivity, it is widely used in electronics, aerospace military, new energy, etc. This field has important application value. [0003] In order to achieve and meet the needs of large-scale industrial production and practical application of graphene, the production and preparation methods of graphene must meet at least three important factors: high quality, large batches, and low cost. Although there are many methods for graphene preparation at home and abroad However, from the perspective of practical requirements such as high quality an...

Claims

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Application Information

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IPC IPC(8): C01B31/04
CPCC01B2204/04C01B2204/22C01B2204/32
Inventor 郑烨亮陈佳敏
Owner 阮伟
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