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Flexible pc graphene coated electromagnetic shielding film material and preparation method thereof

An electromagnetic shielding film, graphene technology, applied in conductive coatings, anti-corrosion coatings, coatings, etc., can solve the problems of difficult surface resistance of conductive coatings, difficult to form conductive paths, multiple reflection losses, etc., to achieve excellent shielding efficiency, enhanced Adhesion strength, wide range of effects

Active Publication Date: 2022-03-22
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
However, after graphene is dispersed in the resin, it is difficult to form a "bridging" contact between the graphene sheets, that is, it is difficult to form a perfect conductive path, and there is a large contact resistance at the junction of the sheets. , making it difficult to further reduce the surface resistance of the conductive coating formed by it

Method used

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  • Flexible pc graphene coated electromagnetic shielding film material and preparation method thereof
  • Flexible pc graphene coated electromagnetic shielding film material and preparation method thereof
  • Flexible pc graphene coated electromagnetic shielding film material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A kind of preparation method of flexible PC graphene coating electromagnetic shielding film material, comprises the following steps:

[0062] (1) Firstly, wipe the PC film after 0.02mm clean, and then through appropriate corona treatment, the surface of the film will form small pores, reaching a certain roughness, and increasing the adhesion strength of the subsequent graphene-coated film;

[0063] (2) Add water-based acrylic resin, graphene slurry, defoamer, and leveling agent with a mass ratio of 1:0.55:0.004:0.045 into the vacuum mixer in sequence, adjust the negative pressure to -0.04mpa, and the speed to 1200r / min, and the stirring time is 3 hours; the solvent water in the graphene slurry is better compatible with the water-based acrylic resin, and the graphene and water-based acrylic resin are evenly dispersed under the action of the high-speed shear stirring paddle;

[0064] The graphene slurry includes graphene, water and a dispersant, and the mass ratio of the...

Embodiment 2

[0070] A kind of preparation method of flexible PC graphene coating electromagnetic shielding film material, comprises the following steps:

[0071] (1) Firstly wipe clean the PC film with a thickness of 0.4 mm, and then undergo appropriate corona treatment to form small pores on the surface of the film to reach a certain roughness and increase the adhesion strength of the subsequent graphene-coated film;

[0072] (2) Add water-based acrylic resin, graphene slurry, defoamer, and leveling agent with a mass ratio of 1:0.65:0.006:0.055 into the vacuum mixer in sequence, adjust the negative pressure to -0.06mpa, and the speed to 1800r / min, and the stirring time is 6 hours; the solvent water in the graphene slurry is better compatible with the water-based acrylic resin, and the graphene and water-based acrylic resin are evenly dispersed under the action of the high-speed shear stirring paddle;

[0073] The graphene slurry includes graphene, water and a dispersant, and the mass rat...

Embodiment 3

[0079] A kind of preparation method of flexible PC graphene coating electromagnetic shielding film material, comprises the following steps:

[0080] (1) Firstly wipe clean the 0.2mm thick PC film, and then undergo appropriate corona treatment, the surface of the film will form tiny holes to reach a certain roughness, and increase the adhesion strength of the subsequent graphene-coated film;

[0081] (2) Add water-based acrylic resin, graphene slurry, defoamer, and leveling agent with a mass ratio of 1:0.6:0.005:0.05 into the vacuum mixer in sequence (weigh 10g of water-based acrylic resin, 6g Graphene slurry, 0.05g of defoamer, 0.5g of GSK-550 polyether modified siloxane leveling agent are added to the vacuum mixer successively), and the negative pressure is adjusted to be -0.05mpa, and the rotating speed is 1600r / min , the stirring time is 4h; the solvent water in the graphene slurry is better compatible with the water-based acrylic resin, and the graphene and the water-based...

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Abstract

The invention relates to the technical field of electromagnetic shielding materials, in particular to a flexible PC graphene-coated electromagnetic shielding film material and a preparation method thereof. The preparation method comprises the steps of performing corona treatment on the flexible PC film, preparing viscous slurry, scraping and coating the viscous slurry, drying and the like. In the preparation method, water-based acrylic resin is used as an adhesive, and graphene and nano copper powder are used simultaneously to form a conductive path. Compared with the prior art, the invention has a simple process for preparing electromagnetic shielding materials, an environmentally friendly process, uniform scraping coating, soft and foldable finished products, excellent electromagnetic shielding performance, etc., and broad market prospects.

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 Patents(China)
IPC IPC(8): C08J7/044C09D133/04C09D7/20C09D5/24C09D7/80C09D5/08C08L69/00
CPCC09D7/80C09D133/04C09D5/08C09D5/24C09D7/20C08J2433/04C08K2003/085C08K2201/011C08J2369/00C08J7/0427C08K3/08C08K3/042
Inventor 林前锋
Owner HUNAN GUOSHENG GRAPHITE TECH CO LTD
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