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Preparation method of graphene

A technology of graphene and graphite powder, which is applied in the field of chemical synthesis materials, can solve the problems of high preparation cost, difficult disposal of waste liquid, dangerous preparation method, etc., and achieve the effect of changing thermal conductivity

Inactive Publication Date: 2018-09-25
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the graphene prepared by the redox method has many defects, and the preparation method is relatively dangerous, and the waste liquid generated by the experiment is not easy to handle.
Although the vapor deposition method can produce high-quality graphene, the preparation cost of this method is very high and it is not suitable for large-scale promotion.

Method used

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  • Preparation method of graphene
  • Preparation method of graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] a. Weigh 2.0g gum arabic and dissolve it in 50ml deionized water and heat it with constant stirring until it is completely dissolved to obtain a light yellow solution;

[0019] b. Take 5 ml light yellow gum arabic solution, add to 500 ml containing 300g ZrO with a radius of 2 mm 2 Ball milled at 300rpm for 5 min in a polytetrafluoroethylene tank of the pellets, so that the gum arabic solution adhered to the surface of the ZrO2 pellets as much as possible. Add 0.5g of graphite powder (99.95%), ball mill for 10h under the same conditions, then add 50 ml of deionized water, continue ball milling for 10min, take out the solution and centrifuge at 3000 rpm for 60min. Removal of the precipitate yielded a uniform and stable black solution.

[0020] figure 1 Shown is the schematic diagram of ball milling. By covering the surface of the ball with a layer of viscous gum arabic solution, and then adding graphite, the graphite is peeled off during the continuous rolling of many ...

Embodiment 2

[0025] a. Weigh 2.0g of gum arabic and dissolve it in 50ml of deionized water, stir and heat until completely dissolved to obtain a light yellow solution.

[0026] b. Take 8 ml light yellow gum arabic solution, add to 500 ml containing 300g ZrO with a radius of 4 mm 2 Ball milled at 300 rpm for 5 min in a polytetrafluoroethylene tank to make the gum arabic solution adhere to the ZrO2 as much as possible. 2 surface of the ball. Add 0.5g of graphite powder (99.95%), ball mill for 10 h under the same conditions, then add 50 ml of deionized water, continue ball milling for 10 min, take out the solution and centrifuge at 4000 rpm for 60 min. Removal of the precipitate yielded a uniform and stable black solution.

Embodiment 3

[0028] a. Weigh 3.0g gum arabic and dissolve it in 50ml deionized water and heat it with constant stirring until it is completely dissolved to obtain a light yellow solution.

[0029] b. Take 4 ml light yellow gum arabic solution, add to 500 ml containing 300g ZrO with a radius of 2mm 2 Ball milled at 300 rpm for 5 min in a polytetrafluoroethylene tank to make the gum arabic solution adhere to the ZrO2 as much as possible. 2 surface of the ball. Add 0.5g of graphite powder (99.95%), ball mill for 8 h under the same conditions, then add 50 ml of deionized water, continue ball milling for 10 min, take out the solution and centrifuge at 3000 rpm for 60 min. Removal of the precipitate yielded a uniform and stable black solution.

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Abstract

The invention discloses a preparation method of graphene. The method comprises the following steps: a) dissolving Arabic gum into de-ionized water and continuously stirring and heating until the Arabic gum is completely dissolved, so as to obtain a light yellow solution; b) taking the light yellow solution and adding into a polytetrafluoroethylene pot filled with ZrO2 spheres; carrying out ball milling for 5 to 10min at the rotary speed of 200 to 300 rpm, so as to attach the solution on the surfaces of the spheres; then adding graphite powder, and carrying out ball milling for 5 to 10 h underthe same condition; then adding de-ionized water and continually carrying out ball milling for 10 to 20 min; taking out the solution and centrifuging for 30 to 60 min at the speed of 1000 to 5000 rpm;removing sediment to obtain a uniform and stable black solution, i.e., the graphene. The preparation method disclosed by the invention takes the Arabic gum and the graphite as raw materials; a graphene solution is obtained through mechanical ball milling and centrifugal separation effects, and the size of the obtained graphene is 2 to 3 mu m. The graphene is doped into a high molecular material and the heat conduction performance of the high molecular material can be remarkably improved.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis materials, in particular to a mechanical ball milling technique and the principle of sticking adhesive tape to peel and prepare graphene. Background technique [0002] As a two-dimensional nanomaterial, graphene has attracted the attention of countries all over the world since it was discovered in 2004, and it has excellent properties and wide applications due to its high light transmittance, strong electrical and thermal conductivity, small resistance, large specific surface area and high mechanical strength. The prospect became a hot spot for people to pay attention to. These unique properties make graphene suitable for many fields such as electronic devices, photonic devices, advanced composite materials, coatings, energy storage devices, sensors, biology, etc. These same outstanding properties and potential applications have stimulated the production of graphene . [0003] But so ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/19
CPCC01B2204/32C01B32/19
Inventor 李强李喜杨薇李鑫沈艺波戴梦婷王冰
Owner EAST CHINA NORMAL UNIV
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