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Production method of anti-overlapping thin-layer graphene

A thin-layer graphene and production method technology, applied in the field of material chemistry, can solve problems such as difficult thin-layer graphene sheets, and achieve the effects of small environmental impact, simple production process, and small damage

Inactive Publication Date: 2015-05-20
赵社涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The equipment and process of the ball milling method are simple, and it is easy to realize large-tonnage production, but it is not easy to obtain a large amount of thin-layer graphene sheets directly using the above ball milling method

Method used

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  • Production method of anti-overlapping thin-layer graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Get 400 grams of dried expanded graphite powder, add the vertical stirring ball mill, start the feeding pump and inject the chlorosulfonic acid of 12000ml. Then add 40 grams of superconducting carbon black, fill with 5 kilograms of balls, and mill for 10 hours. After ball milling, press and filter with a nitrogen pressure of 1.0 Mpa to reclaim excess superacid for recycling. Into the obtained filter cake, deionized water was carefully and slowly injected to decompose the remaining superacid, press-filtered and washed several times, and vacuum-dried overnight at 80°C to obtain a dry powder. Accompanying drawing is the thin-layer graphene transmission electron micrograph that embodiment 1 produces. In the produced powder, graphene sheets with a thickness below 10nm account for more than 50% of the total graphite sheets, and obviously contain a large number of thin-layer graphene, and the number of layers is between a single layer and 20 layers.

[0029] Get 100 grams of ...

Embodiment 2

[0031] Get 20 grams of dried 800 mesh natural flake graphite, add it into a horizontal sand mill, and then add 100 grams of pigment carbon black. Start the feeding pump to inject 3000ml of fluorosulfonic acid, and the sanding time is 8 hours. After grinding, press and filter with 0.8Mpa nitrogen pressure to recover excess super acid for recycling. Into the resulting filter cake, carefully and slowly inject NaOH aqueous solution to decompose the remaining superacid, press filter and wash several times, and vacuum dry overnight at 100°C to obtain a dry powder. In the produced powder, graphene sheets with a thickness below 10nm account for more than 50% of the total graphite sheets, and obviously contain a large number of thin-layer graphene, and the number of layers is between a single layer and 20 layers.

Embodiment 3

[0033] Get 10 grams of dried 300-mesh expandable graphite powder, add it to a high-energy planetary ball mill, and add 5 grams of fumed silica at the same time, then inject 50 ml of oleum, and fill the ball mill tank with nitrogen gas. In order to prevent the heat generated during the milling process from increasing the temperature in the milling tank, stop the machine for cooling every half an hour to ensure that the temperature in the mill does not exceed 60°C, and the milling time is 24 hours. After ball milling, the obtained mixture is moved into a quartz boat, which is pushed into a quartz tube vacuum furnace, which is connected to a water ring vacuum pump, which uses alkaline solution as a circulating water source. Turn on the water ring vacuum pump, and at the same time gradually increase the temperature to 900°C, cool down and take out the quartz boat to obtain a dry powder. In the produced powder, graphene sheets with a thickness below 10nm account for more than 50% o...

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Abstract

The invention belongs to the field of graphene preparation of material chemistry, and particularly relates to a production method of anti-overlapping thin-layer graphene. The production method provided by the invention is characterized in that graphite is used as a raw material for ball milling, and the thin-layer graphene is obtained by combining the release force of ball milling, the release force of super acid and the anti-overlapping effect of an inorganic nano material. The method has the advantages of short process, simple equipment and low production cost; and the prepared thin-layer graphene has high quality and relatively good industrial potential. The anti-overlapping thin-layer graphene can be applied to conductive plastics, conductive coatings and ink and also can be applied to the electrodes of lithium batteries and super capacitors as well as the composite materials needing high electrical conductivity and heat conductivity.

Description

technical field [0001] The invention belongs to the field of material chemistry, and more specifically relates to a method for producing anti-backlapping thin-layer graphene by adopting a ball milling process. Background technique [0002] Since it was discovered by scientists such as Geim of the University of Manchester in the United Kingdom in 2004, the research and application of graphene has been widely carried out all over the world (Novoselov K.S., Geim A.K., Morozov S.V., et al.Electric field effect in atomically thin carbon films[J ]. Science, 2004, 306(5696): 666-669). Graphene is a kind of SP 2 The planar two-dimensional nano-carbon material composed of hybrid carbon atoms has a thermal conductivity as high as 5000W / m.K and a theoretical specific surface area as high as 2630m 2 / g, the monolayer absorption coefficient is only 2.3%. It is the substance with the highest strength known, and it has good transparency, electrical conductivity and thermal conductivity....

Claims

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Application Information

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IPC IPC(8): C01B31/04
Inventor 赵社涛赵社军赵社民
Owner 赵社涛
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