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A kind of quasi-mechanical stripping device and production method for producing graphene at a ton level

A mechanical exfoliation and graphene technology, which is applied to a ton-scale production of graphene-like mechanical exfoliation devices and its production field, can solve the problems that restrict the industrialization process of graphene, the specific surface area is not too large, and the graphene defects are many. The effect of perfect structure, good electrical conductivity and simple method

Active Publication Date: 2016-08-24
合肥微晶材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some use salt intercalation and then liquid-phase exfoliation. The graphene prepared by this method has low oxygen content and good electrical conductivity, but the degree of exfoliation is relatively low and the specific surface area is not too large; some oxidize the intercalation and then exfoliate. This method has a high degree of exfoliation and a large specific surface area, but the graphene produced has many defects and a large oxygen content, which restricts the industrialization process of graphene

Method used

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  • A kind of quasi-mechanical stripping device and production method for producing graphene at a ton level
  • A kind of quasi-mechanical stripping device and production method for producing graphene at a ton level
  • A kind of quasi-mechanical stripping device and production method for producing graphene at a ton level

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Embodiment 1

[0041] Such as figure 1 As shown, the quasi-mechanical stripping device for producing graphene at the ton level of the present embodiment is composed of three-stage stripping equipment connected in series;

[0042] The structure of the stripping equipment is as follows: two feed ports 1a are arranged at the upper end of a material bin 2, and a discharge port 1b is provided at the lower end, and the lower part of the discharge port 1b is connected with the distribution bin, and a filter screen 5 is arranged in the distribution bin. , the filter screen 5 separates the sub-material bin into a coarse material bin 4a and a fine material bin 4b. After the material in the material bin 2 enters the sub-material bin through the discharge port 1b, it is filtered by the filter screen 5 and can enter through the filter screen 5. The fine material bin 4b, the material that does not pass through the filter screen 5 enters the coarse material bin 4a; a rotor 3 is arranged in the material bin...

Embodiment 2

[0060] When the quasi-mechanical stripping device of the present invention is only composed of one-stage stripping equipment, it can be simplified as a grinding disc structure, that is, the material bin 2 and the rotor 3 are equivalent to two circular marble grinding discs of a marble stone mill, and the contact surfaces of the two discs are set regular grooves such as Image 6 shown. When in use, add 500g of flake graphite between two circular grinding discs with a diameter of 1m. While turning the grinding disc counterclockwise, add alcohol from the top of the grinding disc. There are regular grooves inside the upper and lower fans of the stone mill. , and the middle is deep and the outside is shallow, and there is still a certain gap in the middle. With the rotation of the upper fan mill, the graphite first enters the gap between the two grinding discs according to the engraved chute channel, and then gradually enters the regular groove. During this process, the van der Wa...

Embodiment 3

[0064] As a comparison, the present embodiment adopts chemical method to prepare graphene powder, specifically as follows: add 5mL oleum in a 250mL flask, add 2g graphite powder and 1g NaNO under stirring in an ice bath 3 After stirring the mixture evenly, add 6g of potassium permanganate three times, during which the temperature should not exceed 20°C. Continue stirring until the temperature rises to 35°C, continue stirring for 30 minutes, add deionized water, stir for another 20 minutes to make the solution uniform, add 5mL hydrogen peroxide, at this time the solution gradually turns bright yellow, filter while it is hot, and wash the obtained product with 5% hydrochloric acid successively Wash with deionized water until the solution is neutral, put the cleaned product into a vacuum drying oven and dry at 60° C. to obtain graphite oxide. Take 100mg of graphite oxide and disperse it in 100mL of water to obtain a brown-yellow suspension, put the liquid in an ultrasonic cleaner...

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Abstract

The invention discloses a machine-like stripping device for ton-scale production of graphene and a production method of the machine-like stripping device. The machine-like stripping device is characterized by comprising one or more stages of stripping devices which are connected in series, wherein each stripping device comprises a material bin, a rotor, a material distribution bin and the like, the lower part of the rotor is matched with that of the material bin, and when the rotor rotates, relative friction is formed at the matching position between the outer surface of the rotor and the inner surface of the material bin. During use, graphite raw material receives the shearing action of a friction force at the matching position, and Van der Waals forces among graphite layers of the graphite collapse so that the graphite is stripped and thinned into graphene which is fed into the material distribution bin. The machine-like stripping device for ton-scale production of graphene is simple to operate and can realize batch production of graphene, and the obtained graphene has a perfect crystal structure, a large specific surface area and good conductivity.

Description

technical field [0001] The invention relates to batch production equipment and a production method of graphene. Background technique [0002] Graphene, also known as single-layer graphite, is a carbon atom with sp 2 The hybrid orbitals form a hexagonal planar film with a honeycomb lattice, which is a two-dimensional nanomaterial with a thickness of only one carbon atom. Although the discovery of graphene is only about 10 years old, it has triggered waves of research and development that have swept the world. Graphene is a two-dimensional crystal tightly packed with carbon atoms, which has amazing electron transport, electrical conduction, heat conduction and mechanical properties. In 2004, Andre Geim and Konstantin Novoselov, physicists at the University of Manchester in the UK, successfully stripped graphene from graphite in the laboratory, and proved that graphene can exist alone, so they won the 2010 The Nobel Prize in Physics in 2010 set off a global research boom in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04
Inventor 张梓晗吕鹏吴义良
Owner 合肥微晶材料科技有限公司
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