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A kind of graphene material powder and preparation method

A graphene and powder technology, applied in the field of graphene material powder and preparation, can solve the problems of difficulty in restoring the original state, unfavorable application, large volume, etc.

Active Publication Date: 2017-12-29
NINGBO MORSH TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although adopting this preparation method can obtain graphene material powder with lower degree of agglomeration and better dispersion, the graphene material powder has a small density and a large volume, which is not conducive to transportation and storage. It is very easy to fold back and it is difficult to restore the original state. It is easy to fly when used, which is very unfavorable for its application in downstream products.

Method used

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  • A kind of graphene material powder and preparation method

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preparation example Construction

[0043] Compared with the prior art, the graphene material powder provided by the present invention is composed of a graphene material and a polymer, and the surface of the graphene material is evenly covered with a polymer, so that the adjacent graphene materials are evenly spaced. There are polymers that form a barrier. Therefore, the graphene materials in the graphene material powder of the present invention are not entangled with each other, do not fold back when subjected to external pressure, and are very easy to disperse in a solvent. Preferably, the graphene material powder can also include a plurality of graphene material assemblies with special structural design, the graphene material assembly is a nearly spherical structure or a granular structure, and the particle size range is 10 to 300 μm. The graphite Apparent density of olefin material powder ≥ 0.02g / cm 3 . Preferably, the apparent density of the graphene material powder is 0.05g / cm 3 ~0.2g / cm 3 . Since the...

Embodiment 1

[0064] Get 100Kg mass concentration and be 0.1% graphene material slurry (solvent is water), be 1:5 to take by weighing 0.5Kg polyvinyl alcohol (PVA) to join above-mentioned graphene material slurry according to the mass ratio of graphene material and polymer The intermediate slurry was prepared in the middle; the intermediate slurry was spray-dried, the inlet air temperature was 270°C, and the outlet temperature was 150°C. Obtain graphene material powder.

[0065] figure 1 For the scanning electron microscope (SEM) figure of the graphene material powder that the embodiment of the present invention 1 obtains, by figure 1 It can be seen that the particle size range of the graphene material powder obtained in Example 1 of the present invention is 10 μm to 50 μm.

Embodiment 2

[0067] Get 100Kg mass concentration and be 0.1% graphene material slurry (solvent is water), be 1:5 to take by weighing 0.5Kg polyvinyl alcohol (PVA) to join above-mentioned graphene material slurry according to the mass ratio of graphene material and polymer The intermediate slurry is prepared in an intermediate slurry; the intermediate slurry is slowly added to ether under stirring until the graphene material and polyvinyl alcohol (PVA) are completely precipitated, then filtered with suction, and treated in an oven at 30-200°C until the solvent is completely evaporated That's it.

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Abstract

The invention provides a graphene material powder suitable for industrial application. The graphene material powder is composed of a graphene material and a polymer, and the surface of the graphene material is evenly covered with a polymer, so that adjacent All graphene materials have polymer barriers between them, and their apparent density is ≥0.02g / cm3. The graphene material powder provided by the present invention, when subjected to external pressure, the graphene material will not fold back, and it is easy to return to the original state, which is convenient for transportation and storage; at the same time, the graphene material powder has the same characteristics as other systems. Good compatibility greatly expands the application field of the graphene material powder in downstream products. Successfully solved the industrial application problem of graphene material powder. 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 Patents(China)
IPC IPC(8): C01B32/194
Inventor 刘兆平周旭峰唐长林秦志鸿胡建国王国华赵永胜
Owner NINGBO MORSH TECH
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