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High-temperature reaction tube for preparing graphene by electrifying carbon powder

A high-temperature reaction tube and graphene technology, which is applied in the direction of graphene, nano-carbon, etc., to achieve the effects of improving strength, easy process amplification, and reducing costs

Pending Publication Date: 2022-04-12
吕海港 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of high temperature resistance of the reaction tube for preparing graphene by electric flash evaporation method, and provide a high temperature reaction tube for preparing graphene by electrifying carbon powder

Method used

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  • High-temperature reaction tube for preparing graphene by electrifying carbon powder
  • High-temperature reaction tube for preparing graphene by electrifying carbon powder
  • High-temperature reaction tube for preparing graphene by electrifying carbon powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown, a kind of carbon powder electrification in the present embodiment prepares the high-temperature reaction tube of graphene, and it comprises the polymer inner tube 1 and the metal outer tube 2 of tight combination, and the reactant carbon powder 3 is placed in the middle of the inner tube, and the inner tube two Each end has a copper plug 4 and 5 to block the carbon powder in the middle, and the two copper plugs are connected to the copper electrodes 6 and 7 respectively, and the copper electrodes are connected to the positive pole 9 and the negative pole 10 of the DC power supply 8 again.

[0025] The polymer inner tube is made of polytetrafluoroethylene (PTFE), with an inner diameter of 10 mm and a tube wall of 5 mm; the metal outer tube is a copper outer tube with an inner diameter of 20 mm and a tube wall of 5 mm. Therefore, the polytetrafluoroethylene inner tube and the copper outer tube are tightly nested together to form a high-temperatu...

Embodiment 2

[0030] Using the reaction device of Example 1, respectively using p-polyphenylene (PPL), polybenzimidazole (PBI), polyetheretherketone (PEEK), polyimide (PI) or polyamideimide (PAI) Make the polymer interior tube of reactor, its inner diameter and wall thickness are identical with the polytetrafluoroethylene inner tube of embodiment 1, and copper outer tube is also identical with embodiment 1, and the reaction tube that makes is loaded into 0.5 gram conductive carbon black respectively Perform an electro-flash reaction. The obtained powder test obtained a scanning electron microscope image and a Raman spectrum image, and these two images are basically the same as in Example 1, which proves that graphene materials with less than 5 layers are prepared respectively.

[0031] The electric flash reaction was carried out several times, and para-polyphenylene (PPL), polybenzimidazole (PBI), polyetheretherketone (PEEK), polyimide (PI) and polyamideimide (PAI) were respectively After ...

Embodiment 3

[0033] The inner diameter of the polytetrafluoroethylene inner pipe in embodiment 1 is selected as 8,10,20,100,200,250 millimeters respectively, and the inner pipe wall thickness is 5 millimeters; The inner diameter of the copper outer pipe is respectively 18,20,30 millimeters. , 110, 210, and 260 mm, and the wall thickness is 5 mm, and 6 kinds of graphene reactors prepared by electric flash evaporation were produced respectively.

[0034] When the inner diameter of the polytetrafluoroethylene inner tube is 8 millimeters, only 0.2 gram of conductive carbon black can be filled at a time, and the production speed is very slow, so it is not suitable for large-scale production.

[0035] When the inner diameter of the inner tube is 10, 20, 100, and 200 mm, 0.5, 2.0, 50, and 200 grams of conductive carbon black can be loaded each time, and the resistance is 1, 0.5, 0.1, and 0.05 ohms, and the electric flash reaction can be normal. Carry out, the scanning electron micrograph and the ...

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Abstract

In order to reduce the cost of equipment for preparing graphene by an electric flash evaporation method, the invention provides a high-temperature reaction tube for preparing graphene by electrifying carbon powder, which is a double-layer tube formed by tightly combining a polymer inner tube and a metal outer tube. The double-layer tube can be repeatedly used for tens of thousands of times, so that the cost of preparing the graphene by an electric flash evaporation method is effectively reduced, and a new process technology is provided for large-scale production of the graphene.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, and in particular relates to a high-temperature reaction tube for preparing graphene by electrifying carbon powder. Background technique [0002] Graphene is a two-dimensional nanomaterial composed of a single layer of honeycomb carbon atoms. It is the thinnest, lightest, strongest, and hardest material. It has excellent electrical and thermal conductivity, and is known as the "king of materials." The current large-scale production of graphene is mainly based on the graphite redox process. In view of the complex process technology and waste liquid treatment, the production cost of graphene is very high, and the price of graphene powder on the market remains high, which limits the large-scale application of graphene. [0003] WO2020 / 051000 (Flash Joule Heating Synthesis Method and Compositions Thereof) discloses a Joule heat flash method (electric flash method) using electric power to prep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/19
Inventor 吕海港张全福
Owner 吕海港