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Physical stripping production method of graphene

A physical stripping and graphene technology, applied in the field of stripping liquid, can solve the problems of graphene prone to defects, reduce the service life of equipment, and sulfur residue in products, so as to improve the shearing effect of stripping, improve conductivity, and improve stripping force Effect

Inactive Publication Date: 2016-06-29
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

[0024] The present invention is a method for the physical exfoliation production of graphene, the method for the physical exfoliation production of the graphene, the method comprises the following steps:

[0025] 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 ethanol, 50 parts by weight of polyacrylate, and neoprene powder 0.5 parts by weight, lithium fluoride 2 parts by weight. Among them, the particle size of the neoprene powder is 2-20 microns; the number-average molecular weight of the polyacrylate is greater than 100,000. The weight ratio of graphite flakes and stripping liquid is 1:5.

[0026] S2. Ball milling for 4 hours, the rotating speed of the ball mill is 8000rpm / min.

[0027] S3. After the reaction is stopped, the suspension is discharged into the storage tank through the discharge port, and left to...

Embodiment 2

[0031] The present invention is a method for the physical exfoliation production of graphene, the method for the physical exfoliation production of the graphene, the method comprises the following steps:

[0032] 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: 50 parts by weight of ethanol, 50 parts by weight of n-propanol, polyurethane modified acrylic acid 80 parts by weight of ester, 5 parts by weight of styrene-butadiene rubber powder, and 5 parts by weight of sodium fluoride. Among them, the particle size of the styrene-butadiene rubber powder is 2-20 microns; the number-average molecular weight of the polyurethane-modified acrylate is greater than 100,000. The weight ratio of graphite flakes and stripping liquid is 1:2.

[0033] S2. Ball milling for 12 hours, the rotating speed of the ball mill is 4000rpm / min.

[0034] S3. After ...

Embodiment 3

[0038] The present invention is a method for the physical exfoliation production of graphene, the method for the physical exfoliation production of the graphene, the method comprises the following steps:

[0039] 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 40 parts by weight of n-butanol, 60 parts by weight of propylene glycol, polyurethane modified acrylic acid 60 parts by weight of ester, 2 parts by weight of ABS rubber powder, and 0.5 parts by weight of sodium chloride. Among them, the particle size of the ABS rubber powder is 2-20 microns; the number average molecular weight of the polyurethane modified acrylate is greater than 100,000. The weight ratio of graphite flakes and stripping liquid is 1:3.

[0040] S2. Ball milling for 24 hours, the rotating speed of the ball mill is 3000rpm / min.

[0041] S3. After the reaction is sto...

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Abstract

The invention discloses a physical stripping production method of graphene. The method includes the steps of: S1. injecting flake graphite and a stripping solution into a ball milling tank, wherein the stripping solution is composed of 100 parts of an alcohol solvent, 50-80 parts of polyacrylic ester or a polyacrylic ester derivative, 0.5-5 parts of rubber powder, and 0.5-5 parts of a water-soluble salt; S2. conducting ball milling for 4-48h, and controlling the rotation speed of the ball mill above 2000rpm / min; S3. at the end of reaction, discharging a suspension solution to a storage tank and performing standing; S4. conveying the graphene suspension solution into a centrifuge to conduct centrifugation, then taking the supernatant and performing vacuum filtration to obtain a filter cake; and S5. washing the filter cake and conducting freeze drying. The stripping method can efficiently strip graphene.

Description

technical field [0001] The invention relates to the technical field of graphene production, in particular to a stripping liquid for stripping graphite into 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...

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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