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Low-cost preparation method of graphene

A graphene, low-cost technology, applied in the field of low-cost graphene preparation, can solve problems such as difficulty in precise control, difficulty in precision control, and difficulty in large-scale preparation, and achieve the effects of low cost, short cycle, and easy mass production

Inactive Publication Date: 2016-11-16
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is simple to operate, it is time-consuming and laborious, it is difficult to precisely control, the repeatability is poor, and it is difficult to prepare on a large scale
Chemical vapor deposition method is also a method of preparing graphene. This method has strict requirements on the process, high preparation cost, and difficult to control the precision, so further improvement is needed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) 10g graphite powder with a particle size of 50μm and 20ml methylpyrrolidone (NMP), stir and mix in a beaker to form a paste-like mixture;

[0023] (2) Disperse the mixture obtained in (1) ultrasonically for half an hour in a water bath at 60°C, stirring continuously during the ultrasonic process;

[0024] (3) Weigh 100g of alumina grinding balls with particle size gradation and pour the mixture obtained in (2) into the resin ball mill tank, and then add 10ml of NMP to dilute the mixture;

[0025] (4) Put the ball mill tank in (3) into the planetary ball mill, and set the ball mill speed to 400r / min. The milling time is set to 12 hours;

[0026] (5) Add the mixture obtained in (4) to 10 ml of deionized water, and ultrasonically disperse for 15 minutes at room temperature, stirring continuously during the ultrasonic process;

[0027] (6) Pour the mixture in (5) into the tray, and the powder obtained after drying is graphene.

[0028] Attached figure 1 Scanning electron microgra...

Embodiment 2

[0030] (1) Take 10g of graphite powder with a particle size of 50μm and 30ml of methylpyrrolidone (NMP), stir and mix in a beaker to form a paste mixture;

[0031] (2) Disperse the mixture obtained in (1) ultrasonically for half an hour in a water bath at 60°C, stirring continuously during the ultrasonic process;

[0032] (3) Weigh 120g of alumina grinding balls with particle size gradation and pour the mixture obtained in (2) into the resin ball mill tank, and then add 20ml of NMP to dilute the mixture;

[0033] (4) Put the ball mill tank in (3) into the planetary ball mill, and set the ball mill speed to 450r / min. The milling time is set to 18 hours;

[0034] (5) Add the mixture obtained in (4) to 15 ml of deionized water, and ultrasonically disperse for 15 minutes at room temperature, stirring continuously during the ultrasonic process;

[0035] (6) Pour the mixture in (5) into the tray, and the powder obtained after drying is graphene.

Embodiment 3

[0037] (1) Take 8g of graphite powder with a particle size of 50μm and 20ml of methylpyrrolidone (NMP), stir and mix in a beaker to form a paste mixture;

[0038] (2) Disperse the mixture obtained in (1) ultrasonically for half an hour in a water bath at 60°C, stirring continuously during the ultrasonic process;

[0039] (3) Weigh 160g of alumina grinding balls with particle size gradation and pour the mixture obtained in (2) into the resin ball mill tank, and then add 10ml of NMP to dilute the mixture;

[0040] (4) Put the ball mill tank in (3) into the planetary ball mill, and set the speed of the ball mill to 350r / min. The milling time is set to 24 hours;

[0041] (5) Add the mixture obtained in (4) to 15 ml of deionized water, and ultrasonically disperse for 15 minutes at room temperature, stirring continuously during the ultrasonic process;

[0042] (6) Pour the mixture in (5) into the tray, and the powder obtained after drying is graphene.

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Abstract

The invention belongs to the technical field of graphene preparation, and in particular relates to a method for preparing graphene at low cost. The invention combines the advantages of liquid phase exfoliation and mechanical ball milling to prepare graphene. Firstly, the graphite powder is ultrasonically exfoliated in an organic solvent, so that the layer spacing between atoms in the graphite becomes larger and the van der Waals force is weakened, and then the planetary ball mill is used. The exfoliated graphite powder is subjected to wet rapid high-energy ball milling, and the shear force exerted by the grinding ball on the graphite is used to exfoliate the graphite layer by layer into graphene. The graphite used in the present invention has a wide range of sources, and the organic solvent is also a common industrial solvent, with low cost and simple operation process, and can be used for large-scale production.

Description

Technical field [0001] The invention belongs to the technical field of graphene preparation, and specifically relates to a low-cost method for preparing graphene. Background technique [0002] Graphene is a sp 2 The hexagonal two-dimensional grid structure formed by hybrid C atoms continuously expands single-layer, two-layer or multi-layer (<10 layers) materials, and the theoretical surface area of ​​single-layer graphene can reach 2620m 2 / g, the maximum carrier migration rate can reach 2×10 5 cm 2 / (V·S), the breaking strength can reach 130GPa, the elastic modulus is more than 1TPa, the thermal conductivity is about 3000W / (m·K), and the light transmittance is more than 97%. Since graphene was first discovered in 2004, its excellent mechanical and electrical characteristics have quickly become a research hotspot for materials workers. [0003] The preparation technology of graphene has become the key and prerequisite for studying other properties of graphene. At present, the o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
CPCC01P2002/82C01P2004/03C01P2004/04
Inventor 张柳王志李庆刚史国普吴俊彦栗媛媛刘美佳徐菡卿
Owner UNIV OF JINAN
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