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Method for preparing fluorinated graphene dispersion liquid on large scale

A technology of fluorinated graphene and fluorinated graphite, which is applied in the direction of graphene, chemical instruments and methods, carbon fluoride, etc., can solve the problems of easy agglomeration, high yield and high cost, and achieve simple process, low production cost and safety factor high effect

Inactive Publication Date: 2020-04-03
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a method for preparing a fluorinated graphene dispersion in large quantities with a high safety factor and an environmentally friendly process, so as to overcome the safety, high cost, easy agglomeration or low yield of the existing fluorinated graphene preparation methods. question

Method used

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  • Method for preparing fluorinated graphene dispersion liquid on large scale
  • Method for preparing fluorinated graphene dispersion liquid on large scale
  • Method for preparing fluorinated graphene dispersion liquid on large scale

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Mix 1 g of graphite fluoride and 1 g of ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate into 15 ml of deionized water, and sonicate at 40 W for 30 min.

[0025] The mixture was placed in a hydrothermal reactor and reacted at 150°C for 24h.

[0026] The resulting mixture was centrifuged at 2000 rpm for 20 min, and the supernatant of the upper 1 / 2 was collected. Then add 15ml of deionized water, continue to centrifuge at 2000rpm for 20min, and this process is repeated 5 times. The finally obtained dispersion is the fluorinated graphene dispersion of Example 1.

Embodiment 2

[0028] Mix 1 g of graphite fluoride and 1 g of ionic liquid 1-hexadecyl-3-methylimidazole bromide into 15 ml of deionized water, and sonicate at 60 W for 60 min.

[0029] The mixture was placed in a hydrothermal reactor and reacted at 200°C for 20h.

[0030] The resulting mixture was centrifuged at 3000 rpm for 15 min, and the supernatant of the upper 1 / 2 was collected. Then add 15ml of deionized water, continue to centrifuge at 3000rpm for 15min, and this process is repeated 6 times. The finally obtained dispersion is the fluorinated graphene dispersion of Example 2.

Embodiment 3

[0032] Mix 1 g of graphite fluoride and 1 g of ionic liquid 1-dodecyl-3-methylimidazolium tetrafluoroboric acid into 15 ml of deionized water, and sonicate at 80 W for 60 min.

[0033] The mixture was placed in a hydrothermal reactor and reacted at 150°C for 12h.

[0034] The resulting mixture was centrifuged at 4000 rpm for 10 min, and the supernatant of the upper 1 / 2 was collected. Then add 15ml of deionized water, continue to centrifuge at 4000rpm for 10min, and this process is repeated 5 times. The finally obtained dispersion is the fluorinated graphene dispersion of Example 3.

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Abstract

The invention discloses a method for preparing fluorinated graphene dispersion liquid on a large scale. The method comprises the following steps of carrying out hydrothermal reaction on graphite fluoride and ionic liquid, and carrying out centrifugal collection to obtain the fluorinated graphene dispersion liquid. The hydrophobicity of the fluorinated graphene is improved by utilizing the ionic liquid, so that the fluorinated graphene can be stripped in water; the prepared fluorinated graphene dispersion liquid can be stably dispersed for a long time, single-layer or few-layer fluorinated graphene can be obtained, meanwhile, the process is simple and convenient and environment-friendly, the production cost is low, and the large-batch preparation can be achieved.

Description

technical field [0001] The invention belongs to the technical field of two-dimensional material stripping, and specifically refers to a method for preparing fluorinated graphene dispersion in large quantities. Background technique [0002] Fluorinated graphene is an important derivative of graphene, which not only retains part of the SP of graphene 2 structure, and its own SP 3 A structure in which fluorine atoms and carbon atoms are covalently bonded. The unique structure of fluorinated graphene has excellent properties in many aspects. For example, it has extremely low surface energy, stable chemical properties, good thermal stability, wide band gap, and good insulation performance. These excellent properties make fluorinated graphene have broad application prospects in self-cleaning, solid lubricants, superhydrophobic coatings, and nanoelectronic devices. [0003] The current methods for preparing fluorinated graphene can be divided into chemical methods and physical ...

Claims

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Application Information

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IPC IPC(8): C01B32/19C01B32/10
CPCC01B32/19C01B32/10C01B2204/20C01B2204/04C01P2002/72C01P2004/04
Inventor 宋浩杰田瑞杨进贾晓华李永
Owner SHAANXI UNIV OF SCI & TECH
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