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Mechanical stripping graphene for paint and preparation method thereof

A technology of exfoliating graphene and mechanical method, which is applied in the direction of graphene, coating, nano-carbon, etc., can solve the problems of insufficient resin affinity, achieve good adhesion and reduce dosage

Inactive Publication Date: 2019-06-28
GUANGDONG MORION NANOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings and deficiencies in the prior art, the object of the present invention is to provide a preparation method for mechanically exfoliating graphene used in coatings, which solves the problem that the existing graphene powder is too light as a coating filler. The problem of insufficient affinity with the resin, and the reduction of the amount of resin, can prepare graphene suitable for coatings on a large scale

Method used

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  • Mechanical stripping graphene for paint and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of preparation method of the mechanical method exfoliation graphene that coating is used, comprises the steps:

[0027] (1) Dissolving 1 part by weight of graphite flake powder and 0.1 part by weight of surfactant in 5 parts by weight of deionized water to form a mixed solution, adding an appropriate amount of additives, and forming a graphite flake dispersion by mechanical stirring;

[0028] (2) Add the flake graphite dispersion into a sand mill for mechanical sanding to form a graphene slurry;

[0029] (3) Suction filter the graphene slurry, and wash off the added surfactant residue with deionized water;

[0030] (4) Place the filtered graphene in a vacuum drying oven and dry it into graphene powder.

[0031] In the step (1), the particle size of the flake graphite is 12000 mesh.

[0032] In the step (1), the surfactant is a mixture of sodium lauryl sulfate, cetyltrimethylammonium bromide and sodium carboxymethylcellulose in a weight ratio of 1:1:1.

[0033]...

Embodiment 2

[0040] The difference between this embodiment and the above-mentioned embodiment 1 is that 0.5 parts by weight of flake graphite powder and 0.05 parts by weight of surfactant are dissolved in 3 parts by weight of deionized water to form a mixed solution.

[0041] In the step (1), the particle size of the flake graphite is 12000 mesh.

[0042] In the step (1), the surfactant is a mixture of OP emulsifier and Triton X-100 in a weight ratio of 1:1.

[0043] In the step (1), the auxiliary agent is a mixture composed of defoaming agent, ethanol, and n-butanol at a volume ratio of 1:1:1.

[0044] In the step (1), the additive is added in an amount of 0.01 parts by weight.

[0045] In the step (1), the mechanical stirring condition is 8000r / min, stirring for 1h.

[0046] In the step (2), the sanding condition is 2000r / min, and the sanding is 6h.

[0047] In the step (2), the grinding balls are zirconium beads with a diameter of 0.9 mm.

[0048] In the step (3), the vacuum drying ...

Embodiment 3

[0050] The difference between this embodiment and the above-mentioned embodiment 1 is that 1.5 parts by weight of flake graphite powder and 0.15 parts by weight of surfactant are dissolved in 7 parts by weight of deionized water to form a mixed solution.

[0051] In the step (1), the particle size of the flake graphite is 8000 mesh.

[0052] In the step (1), the surfactant is a mixture of sodium lauryl sulfate, cetyltrimethylammonium bromide and sodium carboxymethylcellulose in a weight ratio of 1:1:1.

[0053] In the step (1), the auxiliary agent is a mixture composed of defoaming agent, ethanol, and n-butanol at a volume ratio of 1:1:1.

[0054] In the step (1), the additive is added in an amount of 0.01 parts by weight.

[0055] In the step (1), the mechanical stirring condition is 8000r / min, stirring for 3h.

[0056] In the step (2), the sanding condition is 2000r / min, and the sanding is 10h.

[0057] In the step (2), the grinding balls are zirconium beads with a diamet...

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Abstract

The invention relates to the technical field of graphene preparation, in particular to a mechanical stripping graphene for paint and a preparation method thereof. The preparation method comprises thefollowing steps that (1) 0.5-1.5 parts of crystalline flake graphite powder and 0.05-0.15 part of a surfactant are dissolved in 3-7 parts by weight of deionized water to form a mixed solution, an appropriate amount of an assistant is added, and a crystalline flake graphite dispersion liquid is formed through mechanical stirring; (2) the crystalline flake graphite dispersion liquid is added into asand mill for mechanical sand grinding to form graphene paste; (3) suction filtration is carried out on the graphene paste, and the deionized water is used for washing added surfactant residues away;(4) graphene after suction filtration is put in a vacuum drying oven to be dried into graphene powder. The preparation method has the advantages that the problems that existing graphene powder is toolight and has insufficient affinity with resin as a paint filler are solved, the use amount of the resin is reduced, the preparation method can be suitable for preparing the graphene for the paint ona large scale, and the adhesive property of a prepared coating and gum is better.

Description

technical field [0001] The invention relates to the technical field of graphene preparation, in particular to a mechanically exfoliated graphene used in coatings and a preparation method thereof. Background technique [0002] The industrial preparation of graphene used in coatings and other products mostly adopts ultrasonic and high-pressure grinding conditions. The process is relatively complicated, and graphene is relatively floating, and its affinity with coating resin is insufficient. [0003] Graphene is a honeycomb planar film formed by sp2 hybridization of carbon atoms. It is a quasi-two-dimensional material with only one atomic layer thickness, so it is also called monoatomic layer graphite. Its thickness is about 0.335nm, and there are different fluctuations depending on the preparation method. Usually, the height in the vertical direction is about 1nm, and the width in the horizontal direction is about 10nm to 25nm. It is all carbon crystals except diamond (zero-di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/19C09D7/61
Inventor 蔡金明田力文侯元捷蔡晓明
Owner GUANGDONG MORION NANOTECHNOLOGY CO LTD