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Graphene composite material and preparation method and application thereof

A composite material and graphene technology, applied in electrical components, battery electrodes, circuits, etc., can solve problems such as single function, and achieve the effect of simple process flow, integrity retention, and good conductivity

Inactive Publication Date: 2019-06-18
INST OF CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are related reports on the use of natural polysaccharides to disperse graphene nanosheets in the prior art, their functions are single, and they cannot be dispersed while exfoliating.

Method used

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  • Graphene composite material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Weigh 30 parts by weight of expanded graphite, 15 parts by weight of sulfonated poly(p-phenylene vinylene) (molecular weight is 20000), 15 parts by weight of aromatic polysulfide ketone (molecular weight is 20000) (that is, the total mass of macromolecular polymer is 30 parts by weight) , added together to 800 parts by weight of water and mixed evenly, then the mixed solution was added to a disc mill at a speed of 300r.p.m, and ground for 2h to obtain a graphene composite material dispersion, which was freeze-dried Product available.

[0038] It can be seen from the test that the average number of layers of the prepared graphene composite material is 3 layers, the thickness is 1.25nm, and the electrical conductivity is on the order of 10 4 s / m.

Embodiment 2

[0040] 30 parts by weight of graphite slurry, 15 parts by weight of sulfonated poly(p-phenylene vinylene) (molecular weight is 20000), 15 parts by weight of aromatic polysulfide ketone (molecular weight is 20000) (that is, the total mass of macromolecular polymer is 30 parts by weight) ), were added together into 1000 parts by weight of water and mixed evenly, then the mixed solution was added to a disc mill at a speed of 500r.p.m, ground for 20min, and then ultrasonically dispersed using an ultrasonic disperser with an ultrasonic frequency of 15KHz. The time is 20 minutes to obtain the graphene composite material dispersion liquid, and the product can be obtained after the dispersion liquid is freeze-dried.

[0041] After testing, it can be seen that the average number of layers of the prepared graphene composite material is 2 layers, the thickness is 0.8nm, and the electrical conductivity is on the order of 10 4 s / m.

Embodiment 3

[0043] Claim 5 parts by weight of graphite slurry, 5 parts by weight of expanded graphite (that is, the total mass of multilayer graphite is 10 parts by weight), 15 parts by weight of sulfonated polyparaphenylene vinylene (molecular weight is 20000), polyaromatic polysulfide ketone ( The molecular weight is 20000) 25 parts by weight (that is, the total mass of the macromolecular polymer is a total of 40 parts by weight), and they are added to 1000 parts by weight of water and mixed evenly, and then the mixed solution is added to the disc mill at a speed of 500r. p.m, and grind for 40 minutes to obtain a graphene composite material dispersion, which can be freeze-dried to obtain the product.

[0044] It can be seen from the test that the prepared graphene composite material is a single-layer graphene thickness, about 0.34nm, and the electrical conductivity is on the order of 10 5 s / m.

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Abstract

The invention relates to a graphene composite material and a preparation method and application thereof. The average number of layers of the graphene composite material is 1, 2 or 3 layers, the thickness is 0.34-1.25nm, and the order of magnitude of conductivity is 104-105s / m. The preparation method of the graphene composite material includes the following steps of: taking water as a solvent, adding multi-layer graphite and a macromolecular polymer to the water, uniformly mixing, grinding and / or performing ultrasonic treatment to obtain graphene composite material dispersion liquid, and then freezing and drying to prepare the graphene composite material. According to the scheme of the invention, the macromolecular polymer is added to the multi-layer graphite aqueous solution, the viscosityof the system is increased, the peeling and dispersion of graphite can also be realized by using the shearing force, and thus the single-layer or few-layer graphene composite material with less defects, relatively high quality and good conductivity can be prepared.

Description

technical field [0001] The invention relates to a graphene composite material and its preparation method and application, in particular to a method for exfoliating multilayer graphite by using a macromolecular polymer with a sulfonic acid group or a sulfonyl group and a main chain containing a benzene ring structure. The resulting graphene materials are versatile. Background technique [0002] Graphene is a new two-dimensional planar nanomaterial, and its appearance has attracted worldwide attention. Due to its special monoatomic layer structure, graphene has excellent physical and chemical properties, for example: its specific surface area is as high as 2700m 2 / g, the heat resistance temperature is as high as 2800 ℃, and the conductivity is 10 times that of copper 4 times, the strength is 100 times that of the strongest known steel (the density is only 1 / 6 of steel); in addition, it also has good wave-absorbing performance, lubricating performance and so on. These prope...

Claims

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Application Information

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IPC IPC(8): H01M4/583H01M4/62
CPCY02E60/10
Inventor 马永梅庄亚芳尚欣欣郑鲲焦斌
Owner INST OF CHEM CHINESE ACAD OF SCI
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