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Thin layer graphene-based dispersion slurry, and preparation method and application thereof

A technology of thin-layer graphene and dispersion slurry, which is applied in the field of nanotechnology and coatings, and can solve problems such as poor compatibility and difficult dispersion

Inactive Publication Date: 2019-07-30
苏州格瑞丰纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Thin-layer graphene is an important new functional material. It is a six-membered ring structure formed by sp2 hybridization of carbon atoms. It has excellent electrical conductivity, thermal conductivity and mechanical properties, and has a wide range of uses in coatings. However, Thin-layer graphene sheets are easy to agglomerate and difficult to disperse due to the interlayer van der Waals force, and have poor compatibility with resins and fillers, and carbon materials such as graphene are NTC materials, that is, as the temperature rises, the resistance decreases and the power continues to rise. Fever will bring huge problems to use safety

Method used

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  • Thin layer graphene-based dispersion slurry, and preparation method and application thereof

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Embodiment 1

[0047] A thin-layer graphene-based dispersion slurry added to coating coatings, including the following raw materials in parts by weight, 8 parts of high-quality thin-layer graphene powder, 2 parts of carbon nanotube powder, 0.3 parts of polyvinylpyrrolidone, 0.2 parts of sodium carboxymethyl cellulose, barium titanate (0.4 mol% doped niobium Ba 0.9 Sr 0.1 TiO 3 ) 10 parts, hydrophilic treated polyethylene powder 5 parts, anti-settling agent BYK420 0.5 parts, wetting agent BYK191 0.5 parts, KH550 0.5 parts, defoamer TEGO 902w, deionized water balance.

[0048] A thin-layer graphene-based dispersion slurry added to coating paint, comprising the following steps:

[0049] 1) Add graphene powder, carbon nanotube powder, polyvinylpyrrolidone, sodium carboxymethyl cellulose, TEGO 902w, and deionized water into a vacuum stirring disperser, and stir at 1500 rpm for about 2 hours to disperse evenly, forming pre-dispersion;

[0050] 2) In the pre-dispersion liquid, add KH550, BYK191...

Embodiment 2

[0053] A thin-layer graphene-based dispersion slurry added to coating coatings, including the following raw materials in parts by weight, 5 parts of high-quality thin-layer graphene powder, 2 parts of carbon nanotube powder, 3 parts of conductive carbon black, 2 parts of polyvinylidene fluoride, barium titanate (0.4mol% doped niobium Ba 0.9 Sr 0.1 TiO 3 ) 10 parts, DISPERBYK2000 0.5 parts, TEGO Airex 900, KH550 0.5 parts, fumed silica 0.5 parts, N-methylpyrrolidone balance.

[0054] A kind of preparation method of the thin-layer graphene dispersion slurry that is used for anticorrosion coating, comprises the following steps:

[0055] 1) Add graphene powder, carbon nanotube powder, carbon black powder, TEGO Airex 900, DISPERBYK2000 respectively into the vacuum stirring disperser, carry out vacuum 1500rpm stirring for about 2 hours to disperse evenly, and form a pre-dispersion;

[0056] 2) Fumed silica, KH550, polyvinylidene fluoride, barium titanate (0.4mol% doped niobium Ba...

Embodiment 3

[0059] A thin-layer graphene-based dispersion slurry added to coating coatings, including the following raw materials in parts by weight, 1 part of high-quality thin-layer graphene powder, 1 part of Ketjen black powder, 1 part of polypropylene micropowder, Barium titanate (0.4mol% niobium-doped Ba 0.9 Sr 0.1 TiO 3 ) 1 part, DISPERBYK2200 0.5 part, KH560 0.5 part, Anti-terra-204 0.5 part, N, N-dimethylformamide balance.

[0060] A thin-layer graphene-based dispersion slurry added to coating paint, comprising the following steps:

[0061] 1) Add graphene powder, carbon black powder, DISPERBYK2200, Anti-terra-204, N, N-dimethylformamide respectively into the vacuum stirring disperser, and carry out vacuum stirring at 1500rpm for about 2 hours to disperse evenly and form a pre- Dispersions;

[0062] 2) Add KH560, TEGO Airex 900, polypropylene micropowder, barium titanate (0.4mol% niobium-doped Ba 0.9 Sr 0.1 TiO 3 ) and other remaining components, continue stirring under vac...

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Abstract

The invention discloses a thin layer graphene-based dispersion slurry, and a preparation method and application thereof. The thin layer graphene-based dispersion slurry contains 1 to 10wt% of thin layer graphene, 1 to 10wt% of a conductive auxiliary agent, 1 to 20wt% of a PTC material, 0.5 to 5wt% of a functional auxiliary and residual solvent. The preparation method comprises the following stepsof forming a thin layer graphene alkenyl pre-dispersion slurry by high-speed dispersion of the thin layer graphene, the conductive auxiliary agent, the functional auxiliary agent and the solvent; adding PTC material into the thin layer graphene alkenyl pre-dispersion slurry, and obtaining a thin layer graphene-based dispersion slurry after high-speed dispersion, ball milling and homogeneous emulsification dispersion. The dispersion slurry provided by the invention, when applied to a coating, can improve the dispersion efficiency and dispersion stability of graphene in the coating that has hightemperature sensitivity and PTC strength, and is important to improve safety in the application of current collector coating of energy storage devices and electric heating coating.

Description

technical field [0001] The invention relates to a thin-layer graphene-based dispersion slurry, in particular to a thin-layer graphene dispersion slurry added to coating coatings, its preparation method and application, and belongs to the field of nanotechnology and coatings. Background technique [0002] Energy storage devices such as lithium-ion batteries have become the most widely used energy storage devices due to their high energy density, high operating voltage, long cycle life, and environmental friendliness. Under the background of the country's strong support for the development of new energy vehicles, the market demand for lithium-ion battery performance improvement is imminent. In order to adapt to the development of the modern consumer electronics industry and the new energy industry, especially in terms of energy density, power density and cycle life, the performance requirements are getting higher and higher. However, it cannot be ignored that higher and highe...

Claims

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Application Information

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IPC IPC(8): H01B1/04H01M4/66H01M10/0525H05B3/12H05B3/14
CPCH01B1/04H01M4/663H01M4/664H01M4/666H01M4/668H01M10/0525H05B3/12H05B3/14Y02E60/10
Inventor 刘立天刘立明
Owner 苏州格瑞丰纳米科技有限公司
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