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Graphene composite material and preparation method thereof

A composite material, graphene technology, applied in graphene, chemical instruments and methods, conductive coatings, etc., can solve the problems of poor graphene quality, difficult to improve applicability, and unsuitable for mass production.

Inactive Publication Date: 2017-05-24
CHUNG YUAN CHRISTIAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Traditional graphene production methods include mechanical exfoliation, chemical exfoliation, chemical vapor deposition, or epitaxial growth, etc. However, the above preparation methods are not suitable Mass production, and high production costs, so the actual application is limited
The relatively new graphene production method firstly prepares graphene oxide, and then obtains graphene through reduction reaction. However, although this method is more suitable for mass production, the reaction time is long and sometimes requires a higher reaction temperature. The reduction method used The solvent is easy to cause environmental pollution, and there is also the problem of incomplete graphene reduction, resulting in poor quality and insufficient electrical conductivity of the prepared graphene, making it difficult to improve its applicability.
In addition, since graphene is a nano-carbon material with a high specific surface area, it is very easy to gather and stack in essence, and its dispersion in the solution is poor, especially in water, it is difficult to obtain a uniformly distributed graphene solution, so it is difficult Ensure the contact conduction between the graphene, so that when the graphene film is further formed, it will be relatively loose and insufficient in density, thus affecting the conductivity of the graphene film

Method used

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  • Graphene composite material and preparation method thereof
  • Graphene composite material and preparation method thereof
  • Graphene composite material and preparation method thereof

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Effect test

Embodiment 1

[0036] In this embodiment, the preparation method of the graphene composite material includes: providing a modification solution, including 100 g of deionized water as a solvent, and 0.2 g of dopamine dissolved in deionized water. Next, add 4g of graphene powder (N002-PDR Graphene Powder, Anguqiang Materials Co., Ltd.) to the modification solution, and conduct modification by ultrasonic vibration at 30°C for 60 minutes, and the obtained graphite The graphene composite material is uniformly dispersed in the solution, and in the prepared graphene composite material, the content of dopamine is 2.8wt%. In this embodiment, the deionized water can be further removed by filtration to take out the graphene composite material from the solution, and dry it to obtain the powder of the graphene composite material, and then disperse the graphene composite material powder in water to form a graphene composite material mixed solution, and then provide the graphene composite material mixed so...

Embodiment 2

[0038] In the present embodiment, the preparation steps of the graphene composite material are roughly the same as those in the above-mentioned embodiment 1, the difference is that in the modifying solution, 0.9 g of Tris(hydroxymethyl)aminomethane (Tris(hydroxymethyl)aminomethane, Tris ) as an acid-base regulator, so that the pH value of the modifying solution in this embodiment is 10. According to this embodiment, in the prepared graphene composite material, the content of dopamine is 4.1wt%. In this embodiment, the preparation steps of the graphene composite film are the same as the above-mentioned embodiment 1.

Embodiment 3

[0040] In this embodiment, the preparation method of the graphene composite material includes: providing a modification solution, including 100g of deionized water as a solvent, 0.2g of dopamine dissolved in deionized water, and 0.1g of trimethylolamino Methane is used as an acid-base regulator, so that the pH of the reforming solution in this embodiment is 8.5. Next, add 4g of graphene powder (N002-PDR Graphene Powder, Anguqiang Materials Co., Ltd.) to the modification solution, and conduct modification by ultrasonic vibration at 30°C for 60 minutes, and the obtained graphite The graphene composite material is uniformly dispersed in the solution, and in the prepared graphene composite material, the content of dopamine is 3.2wt%. In this embodiment, the deionized water can be further removed by filtration to take out the graphene composite material from the solution, and dry to obtain the powder of the graphene composite material, and then disperse the graphene composite mater...

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Abstract

The present invention relates to a graphene composite material and a preparation method thereof, wherein the preparation method of the graphene composite material comprises the steps of: providing a modification solution comprising a compound having catechol group, and a first solvent; adding a graphene material into the modification solution; and mixing the graphene material and the modification solution to form a graphene composite material. According to the preparation method of the graphene composite material, a graphene composite with high dispersibility in water is prepared and a graphene composite film with high conductivity is prepared and is beneficial for application to film electrodes in electronic products.

Description

technical field [0001] The invention relates to a graphene composite material and a preparation method thereof, in particular to a graphene composite material with good dispersibility in a solvent, and a preparation method thereof. Background technique [0002] Graphene is a film composed of carbon atoms presenting a two-dimensional honeycomb lattice. Due to the strong force between the carbon atoms that make up graphene and its stable structure, even if graphene is only one atom thick, its material is still strong. Tough and strong. In addition to the advantages of mechanical strength, graphene has excellent thermal conductivity, electrical conductivity, light transmission and other properties, so its application range is quite wide. For example, graphene can be used in communication systems, solar panels, batteries, etc. materials, touch panels and other electronic devices, and also have great application potential in fields such as biomedical engineering or environmental...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583C01B32/184
CPCH01M4/583C01B32/194Y02E60/10C09D5/24
Inventor 洪维松胡倩杰李魁然赖君义
Owner CHUNG YUAN CHRISTIAN UNIVERSITY