Graphene material powder and preparation method

A technology of graphene and powder, which is applied in the field of graphene material powder and preparation, which can solve the problems of easy agglomeration, unfavorable downstream product application, and difficult dispersion, so as to achieve good compatibility and dispersion, improve compatibility and dispersion Sex, the method is simple and easy to implement

Active Publication Date: 2014-10-22
NINGBO MORSH TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the degree of agglomeration of the graphene material powder obtained by this preparation method is reduced and the dispersibility is improved, the graphene material powder is still easy to agglomerate and difficult to disperse in a solvent, which is very unfavorable for its downstream products. application in

Method used

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  • Graphene material powder and preparation method
  • Graphene material powder and preparation method

Examples

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preparation example Construction

[0033] The embodiment of the present invention provides a kind of preparation method of above-mentioned graphene material powder, and it comprises the following steps:

[0034] S110: Prepare graphene material aqueous slurry with a mass concentration of 0.1% to 3%, and add the liquid-absorbing and expanding material to the above-mentioned The graphene material aqueous slurry is prepared as an intermediate slurry.

[0035] In step S110, the source and preparation method of the graphene are not limited, and graphene products well known to those skilled in the art can be used or prepared by conventional preparation methods. Graphene of the present invention is preferably a graphene slurry or a graphene product provided by Ningbo Moxi Technology Co., Ltd. Graphene can be selected from graphene obtained by thermal expansion of graphene oxide prepared by any one of chemical oxidation methods such as Brodie method, Hummers method or Staudenmaier method. Graphene prepared by mechanic...

Embodiment 1

[0049] Get 100Kg mass concentration and be 3% graphene water-based slurry, take by weighing 0.03Kg fiber-polyacrylic acid graft polymer and join above-mentioned graphene material water-based slurry according to the mass ratio of graphene material and liquid-absorbing expansion material as 1:0.01 Prepare the intermediate slurry in the medium, and then treat it in an oven at 30-150°C until the solvent is completely evaporated.

[0050] Depend on figure 1 It can be seen that the graphene material powder obtained in Example 1 of the present invention is basically agglomerated, such as figure 2 As shown, after ultrasonic dispersion in aqueous solution, the graphene sheets are well dispersed.

Embodiment 2

[0052] Get 100Kg mass concentration and be 0.1% graphene water-based slurry, according to the mass ratio of graphene material and liquid-absorbing expansion material is 1:10, take by weighing 1Kg starch-polyacrylic acid or its salt graft polymer and join above-mentioned graphene material The intermediate slurry is prepared from the water-based slurry; the intermediate slurry is spray-dried, the air inlet temperature is 200°C, and the outlet temperature is 120°C.

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Abstract

The invention provides a graphene material powder suitable for industrial application, the graphene material powder is prepared by compounding a graphene material and an imbibition expanding material, the surface of the graphene material is covered with the imbibition expanding material, so that adjacent graphene materials can be obstructed by the imbibition expanding material. When the graphene material powder is dispersed in a solvent, the imbibition expanding material between graphene material sheet layers rapidly absorbs a liquid for expansion to strut the graphene material sheet layers. At the same time, the graphene material powder has good compatibility with other systems, the application field of the graphene material powder in the downstream products is greatly expanded, and the problem of industrial application of the graphene material powder is successfully resolved. The invention also provides a preparation method of the graphene material powder.

Description

technical field [0001] The invention relates to the technical field of graphene materials, in particular to a graphene material powder which is beneficial to the application of downstream products and a preparation method. Background technique [0002] Graphene is a two-dimensional material with a single-layer sheet structure composed of carbon atoms and a thickness of only one carbon atom. Graphene has shown excellent performance in many aspects. For example, graphene is almost completely transparent, absorbing only 2.3% of light, and its light transmission is very good; the thermal conductivity of graphene is as high as 5300W / m K, which is higher than Carbon nanotubes and diamonds; the electron mobility of graphene at room temperature exceeds 15,000 cm 2 / V s, which is higher than that of carbon nanotubes and silicon crystals; the resistivity of graphene is only 10 -6 Ω·cm, lower than copper or silver, is currently the material with the smallest resistivity; in addition,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 刘兆平周旭峰唐长林秦志鸿胡建国赵永胜
Owner NINGBO MORSH TECH
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