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Electrostatic and electromagnetic compatible coating layer based on graphene

An electromagnetic compatibility and antistatic technology, applied in coatings, conductive coatings, polyurea/polyurethane coatings, etc., can solve the problems of complex electroplating process, electrostatic pollution, blood influence, etc., and achieve long-lasting antistatic and electromagnetic shielding effects. Good stability and weather resistance, wide application effect

Active Publication Date: 2019-05-24
袁瑞峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electrostatic attraction, easy to absorb dust, easily lead to component pollution, affect quality, reduce yield; and discharge phenomenon may cause electronic equipment failure or malfunction, cause electromagnetic interference, and even breakdown precision electronic components, or promote component aging, However, production sites with many flammable and explosive materials or dust and oil mist may even cause explosions and fires, endangering personal life.
Electromechanical and electronic products will produce different degrees of electromagnetic radiation, and electromagnetic radiation will not only interfere with the electromagnetic waves between electronic devices, but also generate noise and reduce the efficiency of internal electronic products and shorten the service life
In addition, static electricity and electromagnetic interference itself can also cause harm to human health. For example, weaker electromagnetic waves can induce currents in the body to stimulate the nervous system. In severe cases, stronger electromagnetic waves may affect the blood, and even have May cause heart disease
[0003] In order to prevent electrostatic pollution and electromagnetic interference of plastic products of electromechanical and electronic products, the existing technology usually adopts electroplating metal coating or coating conductive paint to solve the problem, but the electroplating process has complex processes and may cause environmental problems, and it is now more use less
Conductive coatings are generally divided into intrinsic type and additive type. The film-forming substance of intrinsic type conductive coatings is a high molecular polymer with conductivity itself. many
The film-forming resin of the additive conductive coating itself is not conductive, and it forms a conductive path by adding metal conductive particles. It is widely used due to its simple process and low cost, but the formed metal coating has poor corrosion resistance. Its electromagnetic shielding performance declines significantly over time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In this example, an antistatic and EMC coating composed of a bottom layer and a surface layer is prepared on an ABS plastic substrate. The bottom layer is obtained by spraying the graphene oxide composition on the surface of the plastic substrate, and the surface layer is obtained by spraying the nanographene sheet composition on the surface of the bottom layer.

[0027] The graphene oxide composition consists of 3.0wt% graphene oxide, 5.0wt% copper powder (average particle size 0.2 μm), 1.2wt% dodecyl phosphate monoester, 3.0wt% sodium acetate, 1.0wt% benzotriazole, 10wt% water-dispersible polyurethane, 12wt% ethylene glycol monobutyl ether, and the rest deionized water. First add graphene oxide into deionized water to disperse, then add sodium acetate dropwise and stir for 30 minutes; then add water-dispersible polyurethane, dodecyl phosphate monoester and benzotriazole and stir for 10 minutes; finally add copper powder and ethyl alcohol Glycol monobutyl ether was st...

Embodiment 2

[0031] In this example, an antistatic and EMC coating composed of a bottom layer and a surface layer is prepared on an ABS plastic substrate. The bottom layer is obtained by spraying the graphene oxide composition on the surface of the plastic substrate, and the surface layer is obtained by spraying the nanographene sheet composition on the surface of the bottom layer.

[0032] The graphene oxide composition consists of 5.0wt% graphene oxide, 3.0wt% copper powder (average particle size 0.2 μm), 0.5wt% dodecyl phosphate monoester, 5.0wt% sodium acetate, 0.3wt% 2-mercaptobenzothiazole, 15wt% water-dispersible polyurethane, 8wt% ethyl acetate, and the rest deionized water. First add graphene oxide into deionized water to disperse, then add sodium acetate dropwise and stir for 30 minutes; then add water-dispersed polyurethane, dodecyl phosphate monoester and 2-mercaptobenzothiazole, and stir for 10 minutes; finally add copper powder and ethyl acetate and stirred in a high-speed d...

Embodiment 3

[0036] In this example, an antistatic and EMC coating composed of a bottom layer and a surface layer is prepared on an ABS plastic substrate. The bottom layer is obtained by spraying the graphene oxide composition on the surface of the plastic substrate, and the surface layer is obtained by spraying the nanographene sheet composition on the surface of the bottom layer.

[0037] The graphene oxide composition consists of 5.0wt% graphene oxide, 3.0wt% copper powder (average particle size 0.2 μm), 0.5wt% dodecyl phosphate monoester, 5.0wt% sodium acetate, 0.3wt% 2-mercaptobenzothiazole, 15wt% water-dispersible polyurethane, 8wt% ethyl acetate, and the rest deionized water. First add graphene oxide into deionized water to disperse, then add sodium acetate dropwise and stir for 30 minutes; then add water-dispersed polyurethane, dodecyl phosphate monoester and 2-mercaptobenzothiazole, and stir for 10 minutes; finally add copper powder and ethyl acetate and stirred in a high-speed d...

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Abstract

The invention relates to an electrostatic and electromagnetic compatible coating layer based on graphene, and belongs to the technical field of surface coating. The electrostatic and electromagnetic compatible coating layer is arranged on the surface of plastic and comprises a bottom layer and a surface layer which are arranged on the surface of plastic, the bottom layer comprises the graphene, and the surface layer is provided with nano graphene pieces. The coating layer has the advantages of better stability and weather resistance, a durable electrostatic resistance and electromagnetic shielding effect can be achieved with lower graphene using amount, the cost is lower, and the coating layer can be extensively applied to plastic housings of electromechanical and electronic products.

Description

technical field [0001] The invention relates to the technical field of surface coating, more specifically, the invention relates to a graphene-based antistatic and electromagnetic compatibility coating. Background technique [0002] Due to the characteristics of light weight and low price, more and more electromechanical and electronic products use more plastic products, such as plastic casings. However, plastic is an insulating material, which will cause charge accumulation during use and is not easy to be exported, thus easily generating static electricity. The accumulation of static electricity will produce phenomena such as attraction and discharge. Electrostatic attraction, easy to absorb dust, easily lead to component pollution, affect quality, reduce yield; and discharge phenomenon may cause electronic equipment failure or malfunction, cause electromagnetic interference, and even breakdown precision electronic components, or promote component aging, The production s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C09D175/04C09D5/24C09D7/61C09D7/63C09D7/65
Inventor 袁瑞峰
Owner 袁瑞峰
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