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Application of a graphene composite material as electromagnetic shielding material

A technology of electromagnetic shielding materials and composite materials, which is applied in the application field of graphene composite materials as electromagnetic shielding materials, can solve the problems of increasing material weight and cost, reducing the mechanical properties and processing properties of composite materials, and achieving improved service life and excellent performance. Electromagnetic shielding performance, the effect of shielding electromagnetic radiation interference

Active Publication Date: 2019-05-28
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is possible to further improve the shielding effectiveness of the composite by adding more conductive materials, but excessive addition will reduce the mechanical properties and processability of the composite, while increasing the weight and cost of the material

Method used

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  • Application of a graphene composite material as electromagnetic shielding material
  • Application of a graphene composite material as electromagnetic shielding material
  • Application of a graphene composite material as electromagnetic shielding material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] First, the porosity is 110PPI, the thickness is 1.9mm, and the density is 30mg / cm 3 The polyurethane sponge is immersed in the aqueous solution of sodium lauryl sulfate with a concentration of 10 mg / mL, and soaked for 10 minutes.

[0036] The soaked foam sponge sample was taken out and put into an oven at 100°C for drying and curing, and the time was set for 30 minutes.

[0037] Immerse the dried foam sponge into an aqueous solution of 0.8% of the intercalation graphene content evenly dispersed as a dispersant with 1% carboxymethylcellulose sodium as a dispersant, utilize an iron roller to squeeze the foam sponge, and remove The air in the foam sponge, after soaking for 10 minutes, take it out and put it in an oven to dry and solidify at 120°C, and the time is set for 30 minutes.

[0038] Immerse the dried material again in an aqueous solution of 0.8% intercalation graphene content of evenly dispersed intercalated graphene as a dispersant with 1% sodium carboxymethyl c...

Embodiment 2

[0044] First, the porosity is 110PPI, the thickness is 1.9mm, and the density is 30mg / cm 3 The polyurethane sponge is immersed in the aqueous solution of sodium lauryl sulfate with a concentration of 10 mg / mL, and soaked for 10 minutes.

[0045] The soaked foam sponge sample was taken out and put into an oven at 100°C for drying and curing, and the time was set for 30 minutes.

[0046] Immerse the dried foam sponge into an aqueous solution of 0.8% of the intercalation graphene content evenly dispersed as a dispersant with 1% carboxymethylcellulose sodium as a dispersant, utilize an iron roller to squeeze the foam sponge, and remove The air in the foam sponge, after soaking for 10 minutes, take it out and put it in an oven to dry and solidify at 120°C, and the time is set for 30 minutes.

[0047] Immerse the dried material again in an aqueous solution of 0.8% intercalation graphene content of evenly dispersed intercalated graphene as a dispersant with 1% sodium carboxymethyl c...

Embodiment 3

[0050] First, the porosity is 200PPI, the thickness is 1.9mm, and the density is 30mg / cm 3 The polyurethane sponge is immersed in the aqueous solution of sodium lauryl sulfate with a concentration of 10 mg / mL, and soaked for 10 minutes.

[0051] The soaked foam sponge sample was taken out and put into an oven at 100°C for drying and curing, and the time was set for 30 minutes.

[0052] Immerse the dried foam sponge into an aqueous solution of 0.8% of the intercalation graphene content evenly dispersed as a dispersant with 1% carboxymethylcellulose sodium as a dispersant, utilize an iron roller to squeeze the foam sponge, and remove The air in the foam sponge, after soaking for 10 minutes, take it out and put it in an oven to dry and solidify at 120°C, and the time is set for 30 minutes.

[0053] Immerse the dried material again in an aqueous solution of 0.8% intercalation graphene content of evenly dispersed intercalated graphene as a dispersant with 1% sodium carboxymethyl c...

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Abstract

The invention discloses an application of a graphene composite material as an electromagnetic shielding material, and belongs to the technical field of new materials and applications thereof. The graphene composite material with isotropic and three dimensional connected conductive network skeleton is prepared through uniformly coating the surface of a foam sponge skeleton with a graphene material by compounding graphene and foam sponge. The electromagnetic shielding performance of the material is excellent, and the electromagnetic shielding effectiveness of the material with the thickness of 1.5mm can reach 40dB. The material can bear 80% compression deformation, has good flexibility and elasticity, and has a density of about 0.05g / cm<3>, and the unit density electromagnetic shielding effectiveness can reach 800dB.cm<3> / g. The material can effectively shield electromagnetic radiation interference, improve the reliability of electronic products and prolong the service life of the electronic products as an electromagnetic shielding material. The graphene composite material has characteristics of massive preparation by adopting an industrial method, low cost, light weight and high efficiency.

Description

technical field [0001] The invention relates to the technical field of new materials and their applications, in particular to the application of a graphene composite material as an electromagnetic shielding material. Background technique [0002] The rapid development of modern electronic devices has brought great convenience to people's lives, but it has also caused serious electromagnetic radiation problems, which have seriously affected high-precision electronic equipment and people's physical and mental health. Electromagnetic radiation pollution has been recognized as the fourth largest pollution on the earth after air pollution, water pollution and noise pollution. [0003] The most common and effective way to prevent and control electromagnetic radiation is to use electromagnetic shielding materials to shield harmful electromagnetic waves. Therefore, it is of great significance to develop high-performance electromagnetic shielding materials. The definition of electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08K3/04C08J3/20
Inventor 任文才马超群裴嵩峰黄坤成会明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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