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Stripping agent special for preparing graphene through mechanical stripping and preparation method

A mechanical exfoliation and graphene technology, applied in the direction of graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of difficult purification and transfer, and achieve the effect of avoiding the increase of self-defects

Active Publication Date: 2016-04-20
扬州市诺渡制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple to operate, but the obtained graphene is tightly combined with the stripping agent or dispersant, making it difficult to purify and transfer
[0007] In summary, none of the existing techniques for the preparation of graphene by mechanical exfoliation can effectively expand the interlayer spacing of graphite, exfoliate graphite without pollution, and prevent the mechanical exfoliation of graphene agglomeration to prepare graphene. stripping agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The composition of stripping agent is as follows in the present embodiment:

[0026] Composite nanoparticles, 25% by weight; sodium lauryl sulfate, 2% by weight; and deionized water, 73% by weight.

[0027] The stripper is prepared by the following steps:

[0028] Select the metal iron nanoparticles with a particle size of 20nm and the graphene oxide with a sheet diameter of 100nm to mix, the ratio of the metal iron nanoparticles to the graphene oxide mass is 2:1, add an appropriate amount of dispersant sodium lauryl sulfate and an appropriate amount of Ionized water was stirred evenly with a blender, and the stirring speed of the blender was set to 40 rpm, and heated to 50°C to obtain a cloudy liquid. Add 1 / 3 of graphene oxide leucine into the above turbid liquid, and let it stand for 12 hours. After the esterification reaction is completed, lower the temperature to room temperature, and then obtain a metal iron nano-powder containing metallic iron nano-powder as the ...

Embodiment 2

[0031] Composite nanoparticles, 25% by weight; sodium lauryl sulfate, 2% by weight; and deionized water, 73% by weight.

[0032] The stripper is prepared by the following steps:

[0033] It is selected that the metal iron nanoparticles with a particle diameter of 40nm and the graphene oxide with a sheet diameter of 300nm are mixed, the ratio of the metal iron nanoparticles to the graphene oxide mass is 4:1, adding an appropriate amount of dispersant sodium lauryl sulfate and an appropriate amount of Ionized water was stirred evenly with a blender, and the stirring speed of the blender was set to 40 rpm, and heated to 50°C to obtain a cloudy liquid. Add 1 / 3 of graphene oxide leucine into the above turbid liquid, and let it stand for 12 hours. After the esterification reaction is completed, lower the temperature to room temperature, and then obtain a metal iron nano-powder containing metallic iron nano-powder as the main body. Graphene oxide is wrapped on the outside, and the s...

Embodiment 3

[0036] Composite nanoparticles, 35% by weight; sodium dodecylsulfonate, 1% by weight; and deionized water, 64% by weight.

[0037] The stripper is prepared by the following steps:

[0038] It is selected that the metal iron nanoparticles with a particle diameter of 40nm and the graphene oxide with a sheet diameter of 300nm are mixed, the ratio of the metal iron nanoparticles to the graphene oxide mass is 4:1, adding an appropriate amount of dispersant sodium lauryl sulfate and an appropriate amount of Ionized water was stirred evenly with a blender, and the stirring speed of the blender was set to 40 rpm, and heated to 50°C to obtain a cloudy liquid. Add 1 / 3 of graphene oxide leucine into the above turbid liquid, and let it stand for 12 hours. After the esterification reaction is completed, lower the temperature to room temperature, and then obtain a metal iron nano-powder containing metallic iron nano-powder as the main body. Graphene oxide is wrapped on the outside, and the...

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Abstract

The invention discloses a stripping agent special for preparing graphene through mechanical stripping and a preparation method. The stripping agent is prepared from, by weight, 25%-35% of composite nanoparticles, 1%-5% of dispersing agent and 60%-74% of deionized water, wherein the preparation method comprises the steps that metal or metallic oxide nano powder is taken as the main body which is wrapped with graphene oxide, amino groups are grafted onto the graphene oxide, and then the composite nanoparticles are formed. By means of the method, the stripping agent special for preparing the graphene through mechanical stripping is provided, the space between graphitic layers can be effectively widened, graphite can be stripped in a pollution-free mode, and agglomeration of the graphene can be prevented.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a special stripping agent for mechanically stripping graphene and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional carbon atom crystal discovered in recent years, and it is one of the research hotspots in the field of carbonaceous materials and condensed matter physics. Graphene is the construction of zero-dimensional fullerene, one-dimensional carbon nanotubes, three-dimensional bulk graphite and other sp 2 The basic structural unit of hybrid carbon. Although graphene is only one carbon atom thick and is the thinnest known material, graphene is very strong and rigid. In addition, carbon atoms have four valence electrons, so that each carbon atom can contribute an unbonded π-electron. These π-electrons are perpendicular to the plane to form π-orbits, and π-electrons can move freely in the crystal. Give graphene good ele...

Claims

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Application Information

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IPC IPC(8): C01B31/04
CPCC01B2204/04C01B2204/32
Inventor 陈庆曾军堂叶任海陈兵
Owner 扬州市诺渡制造有限公司
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