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Preparation method of fluorinated graphene

A technology of fluorinated graphene and graphene, which is applied in the field of materials, can solve the problems of high price of graphene oxide, difficulty in controlling the fluorine-carbon ratio of the product, and difficulty in the fluorination process, so as to achieve easy peeling process, easy fluorination, and sheet full effect

Inactive Publication Date: 2020-10-27
广东一纳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large specific surface area of ​​graphene itself, the fluorination process is difficult
Graphene oxide is expensive, and fluorinated graphene prepared by fluorination of graphene oxide has many defects, and the fluorination process is seriously polluted
And it is difficult to control the fluorocarbon ratio of the product through the direct fluorination of graphene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method for fluorinated graphene, comprising the following steps:

[0029] S1. Mix the expanded graphite with the dispersion A, add 40mL of the dispersion A to every mg of the expanded graphite, and ultrasonicate at a frequency of 150Hz for 40min at a temperature of 50°C, then purify and dry to obtain multilayer graphene;

[0030] S2. The multilayer graphene obtained in step S1 is fluorinated;

[0031] The fluorinated multilayer graphene prepared by reacting the multilayer graphene obtained in step S1 with a fluorine-containing substance;

[0032] S3. Mix the fluorinated multilayer graphene obtained in step S2 with the dispersion liquid B, add 90 mL of dispersant B per mg of fluorinated multilayer graphene, and ultrasonicate at a frequency of 180 Hz for 1 h at a temperature of 30° C., and then Purify and dry to obtain fluorinated graphene.

[0033] The dispersion A is formed by mixing ethanol, water and isopropanol in a volume ratio of 1:3:3.

[0034] Th...

Embodiment 2

[0037] A preparation method for fluorinated graphene, comprising the following steps:

[0038] S1. Mix the expanded graphite with the dispersion A, add 80mL of the dispersion A per mg of the expanded graphite, and ultrasonicate at a frequency of 180Hz for 20min at a temperature of 30°C, then purify and dry to obtain multilayer graphene;

[0039] S2. The multilayer graphene obtained in step S1 is fluorinated;

[0040] The fluorinated multilayer graphene prepared by reacting the multilayer graphene obtained in step S1 with a fluorine-containing substance;

[0041] S3. Mix the fluorinated multilayer graphene obtained in step S2 with the dispersion liquid B, add 120 mL of dispersant B per mg of fluorinated multilayer graphene at a temperature of 50° C., ultrasonicate at a frequency of 150 Hz for 3 h, and then purify After drying, fluorinated graphene is obtained.

[0042] The dispersion A is formed by mixing ethanol, water and isopropanol in a volume ratio of 1:5:1.

[0043] Th...

Embodiment 3

[0046] A preparation method for fluorinated graphene, comprising the following steps:

[0047] S1. Mix the expanded graphite with the dispersion A, add 60mL of the dispersion A to every mg of the expanded graphite, and ultrasonicate at a frequency of 160Hz for 30min at a temperature of 40°C, then purify and dry to obtain multilayer graphene;

[0048] S2. The multilayer graphene obtained in step S1 is fluorinated;

[0049] The fluorinated multilayer graphene prepared by reacting the multilayer graphene obtained in step S1 with a fluorine-containing substance;

[0050]S3. Mix the fluorinated multilayer graphene obtained in step S2 with the dispersion B, add 100mL of dispersant B per mg of fluorinated multilayer graphene, and ultrasonicate at a frequency of 170Hz for 2h at a temperature of 40°C, and then Purify and dry to obtain fluorinated graphene.

[0051] The dispersion A is formed by mixing ethanol, water and isopropanol in a volume ratio of 1:4:2.

[0052] The dispersion...

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PUM

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Abstract

The invention relates to the field of materials, in particular to a preparation method of fluorinated graphene. The preparation method comprises the following steps: S1, carrying out mechanical stripping treatment on expanded graphite to obtain graphene with a multilayer structure; S2, carrying out fluorination treatment on the multilayer graphene obtained in the step S1; and S3, carrying out mechanical stripping treatment on the fluorinated multilayer structure graphene obtained in the step S2 to obtain the fluorinated graphene. The preparation method of the graphene sheet layer is a mechanical stripping method, the preparation process is pollution-free, and no waste is generated. Compared with the method for preparing the fluorinated graphene by directly stripping the graphite fluoride,the technical process has the advantages that the graphite is stripped into the multi-lamellar graphene and then subsequent treatment is performed so that the stripping process is easier to implement,and the stripped lamellar graphene is more complete and uniform. Compared with direct fluorination treatment on graphene or graphene oxide, the technology is characterized in that fluorination is firstly carried out on the multi-lamellar graphite microchips, fluorination is easy, the efficiency is high, and the fluorination process is safe.

Description

technical field [0001] The invention relates to the field of materials, in particular to a preparation method of fluorinated graphene. [0002] technical background [0003] Since the Geim research group successfully prepared fluorinated graphene for the first time in 2010, and published an article detailing the structure and properties of fluorinated graphene, fluorinated graphene, as a member of the graphene family, has attracted the attention of scientific researchers. Widely concerned, fluorinated graphene retains the honeycomb carbon-carbon skeleton of graphene, and fluorine atoms interact with carbon atoms in the form of covalent bonds. Therefore, fluorinated graphene not only has graphene's ultra-high specific surface area, high Young In addition to modulus, high breaking strength, and excellent chemical properties, it also has its own unique physical and chemical properties. It has shown excellent application prospects in many high-tech fields such as: hydrogen stora...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/10C01B32/19C01B32/194
CPCC01B32/10C01B32/19C01B32/194
Inventor 王建兴刘才超魏鹏亮杨志鹏白俊
Owner 广东一纳科技有限公司