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Preparation method for high-electrical-conductivity graphene material

A technology with high conductivity and graphene, which is applied in the direction of non-metallic conductors and organic material conductors, can solve the problems of poor processing fluidity of composite materials, decline in mechanical properties of composite materials, and increased production costs, so as to reduce agglomeration and cost Inexpensive, cost-saving effect

Inactive Publication Date: 2015-05-20
QINGDAO WEITENG GRAPHITE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to obtain higher electrical conductivity, it is usually necessary to add high-volume fillers to the polymer matrix, which not only causes the processing fluidity of the composite material to deteriorate during the production process, but also leads to a decrease in the mechanical properties of the composite material and an increase in production costs.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0017] A kind of preparation method of the graphene material of high conductivity, it is characterized in that, described preparation method comprises the steps:

[0018] (1) Graphite pretreatment: Add 50g of graphite into 1000ml of 98% concentrated sulfuric acid at -10~0℃, stir evenly, add 30g of solid sodium nitrate, stir for 2 hours, add 120g of potassium permanganate in batches, every 5g each time, each time interval is 8min, stirring reaction 9h obtains viscous substance;

[0019] (2) Graphene oxide solution: under continuous stirring, pour 100ml of ice water containing 30% hydrogen peroxide into the viscous substance, put it into the water, and use the ultrasonic intensity of 180W and 120kHz for ultrasonic dispersion for 100min , wash with 5% aqueous HCl until there is no sulfate in the filtrate;

[0020] (3) Graphene colloid: place the obtained graphene oxide solution in water and ethanol solvent with a mass ratio of 50:1, and add dropwise at a mass concentration of 5...

Embodiment 2

[0024] A kind of preparation method of the graphene material of high conductivity, it is characterized in that, described preparation method comprises the steps:

[0025] (1) Graphite pretreatment: Add 50g of graphite into 1000ml of 98% concentrated sulfuric acid at -10~0℃, stir evenly, add 30g of solid sodium nitrate, stir for 3 hours, add 120g of potassium permanganate in batches, every Second 5g, each time interval is 10min, and stirring reaction 8h obtains viscous substance A;

[0026] (2) Graphene oxide solution: under continuous stirring, pour 100ml of ice water containing 30% hydrogen peroxide into the viscous substance A, and put it into the water with a power of 200W and an ultrasonic intensity of 130kHz for ultrasonic dispersion 110min, wash with 5% aqueous HCl until there is no sulfate in the filtrate;

[0027] (3) Graphene colloid: place the obtained graphene oxide solution in water and ethanol solvent with a mass ratio of 50:1, and add dropwise at a mass concentr...

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Abstract

The invention discloses a preparation method for a high-electrical-conductivity graphene material, and is characterized in that the preparation method comprises the following steps: (1) pre-processing graphite, (2) preparing a graphene oxide solution, (3) preparing a graphene colloid, (4) preparing a graphene composite material, and (5) obtaining the electrically conductive material. The oxidation degree of the obtained graphite oxide is higher, and the graphene oxide can still be adsorbed on the surface of polymer particles during a reduction process, all used solvents can be recycled, and the cost is saved. Process conditions are simple, the cost is low, polypyrrole in the prepared composite material is evenly coated with graphene, and the composite material as a super capacitor is high in electrical conductivity and good in electrochemical performance and can be used in super capacitor electrode materials, fuel cell materials, catalysis and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of graphene composite materials, in particular to a preparation method of a high-conductivity graphene material. Background technique [0002] Graphite materials have the advantages of high processing precision and good surface effects, especially in the processing of mold cavities for precision, complex, thin-walled, and high-hard materials. Compared with copper, graphite material has the advantages of less consumption, fast discharge speed, light weight and small thermal expansion coefficient, so it gradually replaces copper electrodes and becomes the mainstream of EDM materials. The discharge of graphite is 2-3 times faster than that of copper, and the material is not easy to deform. It has obvious advantages in the processing of thin rib electrodes. The softening point of copper is about 1000 degrees, and it is easy to deform due to heat. In contrast, the thermal expansion coefficient of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/06C08K9/04C08K9/02C08K3/04C08L79/04C08L23/06H01B1/12H01B1/06
Inventor 陶岩华
Owner QINGDAO WEITENG GRAPHITE
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