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Method for preparing graphene powder material

A technology of graphene powder and bulk material, applied in the field of graphene, can solve the problems of high cost, long time, complicated synthesis process, etc., and achieve the effects of high production efficiency, reduced consumption and avoided pollution

Active Publication Date: 2021-06-08
杭州英希捷科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The whole process of this method involves oxidizing graphite into graphite oxide, exfoliating graphite oxide to produce graphene oxide, and then reducing it to graphene through chemical or thermal reduction. This method has cumbersome synthesis process, high cost, long time and easy synthesis of graphene. Defects occur, making it difficult to realize industrial preparation

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  • Method for preparing graphene powder material
  • Method for preparing graphene powder material

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Experimental program
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Embodiment 1

[0026] Embodiment 1: Use roll-to-roll plasma-enhanced chemical vapor deposition equipment to continuously prepare a vertical graphene array on a 25-micron-thick special-purpose rolled copper foil for Kejing graphene. The winding forward speed is 0.5cm / min, and the plasma source is Inductively coupled radio frequency plasma source, the plasma intensity is 800W, the gas source is hydrogen 10sccm and methane 50sccm, and the reaction temperature is 600 degrees Celsius. The vertical graphene copper foil prepared by the chemical vapor deposition process is passed through the PMMA spray area by a winding system, and the PMMA solution is evenly sprayed on the side with the vertical graphene. Then slowly pass through an oven at a temperature of 105 degrees Celsius to heat and solidify, and the time for passing through the heating zone is 5 minutes. After taking it out, using the characteristics of poor bonding between the vertical graphene array and the copper foil, the cured vertical ...

specific Embodiment 2

[0027] Specific embodiment two: Use roll-to-roll plasma-enhanced chemical vapor deposition equipment to continuously prepare vertical graphene arrays on a 25-micron-thick Kejing graphene special-purpose rolled copper foil, the winding forward speed is 0.5cm / min, and the plasma source It is an inductively coupled radio frequency plasma source, the plasma intensity is 800W, the gas source is 20 sccm of hydrogen and 50 sccm of methane, and the reaction temperature is 600 degrees Celsius. The vertical graphene copper foil prepared by the chemical vapor deposition process is passed through the PMMA spray area by a winding system, and the PMMA solution is evenly sprayed on the side with the vertical graphene. Then slowly pass through an oven at a temperature of 105 degrees Celsius to heat and solidify, and the time for passing through the heating zone is 5 minutes. After taking it out, using the characteristics of poor bonding between the vertical graphene array and the copper foil,...

specific Embodiment 3

[0028] Specific embodiment three: Use roll-to-roll plasma-enhanced chemical vapor deposition equipment to continuously prepare vertical graphene arrays on a 25-micron-thick Kejing graphene special-purpose rolled copper foil, the winding forward speed is 0.5cm / min, and the plasma source It is an inductively coupled radio frequency plasma source, the plasma intensity is 800W, the gas source is 10 sccm of hydrogen and 50 sccm of methane, and the reaction temperature is 800 degrees Celsius. The vertical graphene copper foil prepared by the chemical vapor deposition process is passed through the PMMA spray area by a winding system, and the PMMA solution is evenly sprayed on the side with the vertical graphene. Then slowly pass through an oven at a temperature of 105 degrees Celsius to heat and solidify, and the time for passing through the heating zone is 5 minutes. After taking it out, using the characteristics of poor bonding between the vertical graphene array and the copper foi...

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Abstract

The invention relates to a preparation method of a graphene powder material. The preparation method comprises the following steps: (1) growing a vertical graphene array on a copper foil through roll-to-roll plasma chemical vapor deposition equipment by using a special process; (2) dripping a proper amount of PMMA solution on the surface of the copper foil on which the vertical graphene array is grown, uniformly spin-coating the copper foil, and heating in a drying oven for curing; (3) directly and completely stripping the cured vertical graphene PMMA polymer layer from the copper foil by using a mechanical stripping method according to the characteristic of poor binding force between the vertical graphene array and the copper foil; (4) soaking the stripped polymer layer in acetone to completely dissolve PMMA to obtain a graphene sheet suspension; and (5) after filtering and separating the graphene suspended matter, putting the graphene suspended matter into a ball mill or a sand mill to obtain the graphene powder material. The graphene powder material prepared by the preparation method disclosed by the invention has a relatively large lamellar area and relatively high conductivity and heat conductivity coefficient, and can be used as an additive material.

Description

technical field [0001] The invention relates to the technical fields of graphene and chemical vapor deposition, in particular to a method for preparing graphene powder materials. Background technique [0002] Since the discovery of fullerene in 1985 and carbon nanotube in 1991, the study of carbon nanomaterials has been a hot spot in the field of materials research, and has aroused great interest from researchers all over the world. Although three-dimensional (graphite and diamond), zero-dimensional (fullerene) and one-dimensional (carbon nanotubes) allotropes of carbon have been discovered successively, graphene as a two-dimensional allotrope has long been considered due to Due to the instability of thermodynamics, it is difficult to exist independently, and it is difficult to obtain large enough high-quality samples experimentally, so the research on graphene has been in the stage of theoretical exploration. Until 2004, scientists at the University of Manchester in the Un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/186C01B32/194
CPCC01B32/186C01B32/194C01B2204/22
Inventor 张亮叶启开汪小知
Owner 杭州英希捷科技有限责任公司
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