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, high acid consumption, and graphene is prone to defects, and achieves the effect of reducing requirements

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

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

[0026] S1. Inject graphite flakes with a purity of more than 98% and a particle size of 30-500 μm and the stripping solution into the kettle body with a stirrer, start the motor of the kettle body to stir, and mix the materials evenly. The stripping solution is composed of: water 100 parts by weight, 30 parts by weight of ethanol, 50 parts by weight of polyacrylate, 1 part by weight of zinc powder, and 0.5 parts by weight 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. Heat the kettle body, keep the temperature in the kettle body at 80° C., the pressure at 1 atm, the rotation speed of the stirring shaft at 200...

Embodiment 2

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

[0033] S1. Inject graphite flakes with a purity of more than 98% and a particle size of 30-500 μm and the stripping solution into the kettle body with a stirrer, start the motor of the kettle body to stir, and mix the materials evenly. The stripping solution is composed of: water 100 parts by weight, 40 parts by weight of ethanol, 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. Heat the kettle body, keep the temperature in ...

Embodiment 3

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

[0040] S1. Inject graphite flakes with a purity of more than 98% and a particle size of 30-500 μm and the stripping solution into the kettle body with a stirrer, start the motor of the kettle body to stir, and mix the materials evenly. The stripping solution is composed of: water 100 parts by weight, 40 parts by weight of n-butanol, 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. Heat the kettle body, keep t...

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Abstract

The invention discloses a graphene preparation method. The method comprises the steps of: S1. injecting graphite scale and a stripping solution into a stirrer equipped kettle body, starting a motor of the kettle body to perform stirring so as to mix materials evenly, wherein the stripping solution comprises 100 parts of water, 30-100 parts of an alcohol solvent, 50-80 parts of polyacrylic ester or polyacrylic ester derivative, 1-10 parts of sheet metal powder, 0.5-10 parts of rubber powder; S2. heating the kettle body, keeping the internal temperature of the kettle body at 50DEG C-80DEG C, the pressure at 1-3atm and the stirring shaft rotation speed at 1000-2000rpm / min, and carrying out reaction for 3-6h; S3. at the end of the reaction, discharging the upper suspension solution to perform standing; S4. centrifuging the graphene suspension solution, then taking the upper supernatant solution and conducting vacuum filtering to obtain a filter cake; and S5. washing and freeze drying the filter cake. While stripping graphene, the preparation method does not corrode equipment, and also causes no damage to the graphene structure.

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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