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A flexible PA graphene electromagnetic shielding material and a preparing method thereof

An electromagnetic shielding material, graphene technology, applied in the direction of magnetic/electric field shielding, conductive coatings, electrical components, etc., can solve the problems of unenvironmental protection, complicated manufacturing process, multiple reflection loss, etc., and achieve excellent shielding performance and manufacturing process Simple, wide-ranging effects

Active Publication Date: 2019-04-02
HUNAN GUOSHENG GRAPHITE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 3) Multiple reflection loss
These electromagnetic shielding materials are poor in corrosion resistance, and the manufacturing process is complicated, the manufacturing process is not environmentally friendly, and they need to contact volatile acids and heavy metals

Method used

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  • A flexible PA graphene electromagnetic shielding material and a preparing method thereof
  • A flexible PA graphene electromagnetic shielding material and a preparing method thereof
  • A flexible PA graphene electromagnetic shielding material and a preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A preparation method of flexible PA graphene electromagnetic shielding material, comprising the following steps:

[0053] (1) First, clean the surface of the 0.02mm thick PA film, and then undergo appropriate corona treatment to form small holes on the surface of the film, reaching a certain roughness, and increasing the adhesion strength of the subsequent coating film;

[0054] (2) Add water-based acrylic resin, graphene slurry, and defoamer with a mass ratio of 0.9:0.9:0.005 to the vacuum mixer in sequence, adjust the negative pressure to -0.04mpa, and the rotation speed is 1200r / min, and the stirring time is 12h; Graphene slurry comprises graphene, water and dispersant, and the mass ratio of described graphene, water and dispersant is 25:64:1; Described dispersant is the Silok-7170W type dispersant that Silok.China provides The defoamer is DQ-2209 defoamer, produced by Dongguan Century Hongtu Chemical Technology Co., Ltd.; water-based acrylic resin is purchased from ...

Embodiment 2

[0059] A preparation method of flexible PA graphene electromagnetic shielding material, comprising the following steps:

[0060] (1) Firstly, clean the surface of 0.4mm thick PA film, and then after proper corona treatment, the surface of the film will form tiny pores, reaching a certain roughness, and increasing the adhesion strength of the subsequent coating film;

[0061] (2) Add water-based acrylic resin, graphene slurry, and defoamer with a mass ratio of 1.1:1.2:0.008 into the vacuum stirrer in sequence, adjust the negative pressure to -0.06mpa, and the rotation speed is 1800r / min, and the stirring time is 24h; Graphene slurry comprises graphene, water and dispersant, and the mass ratio of described graphene, water and dispersant is 35:73:2; Described dispersant is the Silok-7170W type dispersant that Silok.China provides The defoamer is DQ-2209 defoamer, produced by Dongguan Century Hongtu Chemical Technology Co., Ltd.; water-based acrylic resin is purchased from the mar...

Embodiment 3

[0066] A preparation method of flexible PA graphene electromagnetic shielding material, comprising the following steps:

[0067] (1) First, clean the surface of the 0.2mm thick PA film. When processing, use the front and back sides to wipe clean with a dust-free cloth soaked in absolute ethanol solution. After the PA film is completely dry, use a corona machine to properly treat the PA film. Corona treatment, the surface of the film forms uniform fine pores, reaches a certain roughness, and increases the adhesion strength of the subsequent coating film;

[0068] (2) Add water-based acrylic resin, graphene slurry, and defoamer with a mass ratio of 1:1:0.005 into the vacuum stirrer successively (weigh 10g of water-based acrylic resin, 10g of graphene slurry, 0.05 The defoamer of g is added in the vacuum mixer successively), and the negative pressure is adjusted to be-0.05mpa, and the rotating speed is 1600r / min, and the stirring duration is 24h; in the graphene slurry, the mass ...

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Abstract

The invention relates to the technical field of electromagnetic shielding materials, and particularly relates to a flexible PA graphene electromagnetic shielding material and a preparing method thereof. The method includes subjecting flexible PA film to corona treatment, thick slurry preparation, blade coating of the thick slurry, drying, and other steps. Waterborne acrylic resin is adopted as anadhesive in the method. Compared with the prior art, the electromagnetic shielding material has a simple and environmentally friendly preparation process, blade coating is uniform, and an obtained finished product is soft, foldable, and excellent in electromagnetic shielding performance, and has a wide market prospect.

Description

technical field [0001] The invention relates to an electromagnetic shielding material, especially a graphene-based flexible electromagnetic shielding material and a preparation method and application thereof. Background technique [0002] With the development of information technology and electronic industry, electronic information products are used in all walks of life and can be seen everywhere. While promoting rapid economic and social development, it also brings increasingly serious electromagnetic pollution. In order to avoid the interference of electromagnetic wave radiation on electronic and electrical products, improve the stability and accuracy of electronic and electrical products. In addition to the need to correctly design circuits and rationally layout electronic components, using electromagnetic shielding materials to implement radiation protection is an effective method. [0003] Electromagnetic shielding, that is, using the reflection and attenuation of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08J7/12C08L77/00C09D5/24C09D133/04H05K9/00
CPCC08J7/123C08J2377/00C08J2433/04C09D5/24C08J7/0427H05K9/0081
Inventor 林前锋
Owner HUNAN GUOSHENG GRAPHITE TECH CO LTD
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