Graphene preparation method

A graphene and polyacrylate technology, applied in the field of graphene production, can solve the problems of shortening the service life of equipment, large acid consumption, and graphene is prone to defects, and achieves the effect of reducing ball milling speed and efficient peeling.

Inactive Publication Date: 2016-06-01
江苏碳谷二维世界科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of chemical substance intercalation process consumes a lot of acid, and there are harmful gases such as SOx and NOx or pollution of heavy metal ions in the production process. There are sulfur residues in the product, and the final graphene is prone to defects, and it is harmful to equipment during application. There is corrosion, which reduces the service life of the equipment and increases the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The present invention is a kind of method for preparing graphene, and the method comprises the following steps:

[0026] S1. Inject the graphite flakes with a purity of more than 98% and a particle size of 30 to 500 μm and the stripping liquid into the ball mill tank, wherein the stripping liquid consists of: 100 parts by weight of water, 30 parts by weight of ethanol, and 50 parts by weight of polyacrylate number, 1 part by weight of zinc powder, and 0.5 part of butyl rubber powder. Among them, the number-average molecular weight of the polyacrylate is greater than 100,000; the particle size of the butyl rubber powder is 2-20 microns; the size of the zinc powder is 3-10 microns. The weight ratio of graphite flakes and stripping liquid is 1:2.

[0027] S2. Ball milling for 4 hours, the rotating speed of the ball mill is 6000rpm / min.

[0028] S3. After the reaction is stopped, the suspension is discharged into the storage tank through the discharge port, and left to st...

Embodiment 2

[0032] The present invention is a kind of method for preparing graphene, and the method comprises the following steps:

[0033] S1. Inject graphite flakes with a purity of more than 98% and a particle size of 30 to 500 μm and the stripping solution into the ball mill tank, wherein the stripping solution consists of: 100 parts by weight of water, 40 parts by weight of ethanol, and 20 parts by weight of n-propanol 80 parts by weight of polyurethane modified acrylate, 3 parts by weight of silver powder, and 3 parts by weight of styrene-butadiene rubber powder. Among them, the number-average molecular weight of the polyurethane modified acrylate is greater than 100,000; the particle size of the styrene-butadiene rubber powder is 2-20 microns; the size of the silver powder is 3-10 microns. The weight ratio of graphite flakes and stripping liquid is 1:3.

[0034] S2. Ball milling for 8 hours, the rotating speed of the ball mill is 4000rpm / min.

[0035] S3. After the reaction is st...

Embodiment 3

[0039] The present invention is a kind of method for preparing graphene, and the method comprises the following steps:

[0040] S1. Inject graphite flakes with a purity of more than 98% and a particle size of 30 to 500 μm and the stripping solution into the ball mill tank, wherein the stripping solution consists of 100 parts by weight of water, 40 parts by weight of n-butanol, and 40 parts by weight of propylene glycol 60 parts by weight of polyurethane modified acrylate, 4 parts by weight of nickel powder, 2 parts by weight of silver powder, and 4 parts by weight of neoprene powder. Among them, the number-average molecular weight of polyurethane modified acrylate is greater than 100,000; the particle size of neoprene powder is 2-20 microns; the size of nickel powder and silver powder is 3-10 microns. The weight ratio of graphite flakes and stripping liquid is 1:4.

[0041] S2. Ball milling for 12 hours, the rotating speed of the ball mill is 3000rpm / min.

[0042] S3. After ...

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Abstract

The invention discloses a graphene production method. The method comprises the following steps: 1, injecting graphite flakes and a stripper to a ball milling pot, wherein the stripper comprises 100 parts of water, 30-100 parts of an alcoholic solvent, 50-80 parts of polyacrylate or a polyacrylate derivative, 1-10 parts of sheet metal powder and 0.5-10 parts of rubber powder; 2, carrying out ball millingat a rotating speed of a ball mill of 2000rpm or above for 4-48h; 3, stopping a reaction, discharging a suspension to a material storage pot, and standing the suspension; 4, conveying the graphene suspension to a centrifuge, centrifuging the suspension, taking the obtained supernatant, and carrying out vacuum filtration to obtain a filter cake; and 5, washing the filter cake, and freeze-drying the filter cake. The method allows graphene to be efficiently stripped.

Description

technical field [0001] The invention relates to the technical field of graphene production, in particular to a method for preparing graphene. Background technique [0002] Graphene is a two-dimensional material with good flexibility and electrical properties. What needs to be added is that, strictly speaking, graphene is a single-layer sheet; however, due to the difficulty of preparing single-layer graphene, oligolayer graphene with similar properties is generally also classified into the category of graphene. Inside. [0003] At present, the methods for preparing graphene mainly include: chemical growth method and physical exfoliation method. Compared with the chemical growth method, which is inefficient and not suitable for industrial mass production, the physical exfoliation method mainly uses cheap graphite as a raw material, and applies mechanical force to the graphite crystal to cause the graphite layers to peel off, breaking the van der Waals force between the graph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 戴加龙
Owner 江苏碳谷二维世界科技有限公司
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