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A kind of metal foam doped polyaniline electromagnetic shielding material and preparation method thereof

An electromagnetic shielding material and metal foam technology, applied in the direction of magnetic/electric field shielding, electrical components, etc., can solve the problems of high density, easy corrosion, high price, etc., and achieve the effect of low density, low production cost and extended effective path

Active Publication Date: 2020-05-19
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of traditional metal-based electromagnetic shielding materials such as high price, easy corrosion, and high density, and at the same time provide a metal foam with low density, excellent shielding effect, and low price through the design of the composition and structure of the material. Doped polyaniline electromagnetic shielding material and preparation method thereof

Method used

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  • A kind of metal foam doped polyaniline electromagnetic shielding material and preparation method thereof
  • A kind of metal foam doped polyaniline electromagnetic shielding material and preparation method thereof
  • A kind of metal foam doped polyaniline electromagnetic shielding material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] First configure 1.5mol / L 40mL camphorsulfonic acid solution, and divide it into two parts equally. Mix aluminum foam with a pore density of 130PPI and aniline monomer and let it stand for 30 minutes, then add it to one part of the acid solution, which is called mixture A, wherein the content of aluminum foam is 0.06g / mL, and the content of aniline monomer is 0.12g / mL. Weigh 3.38g of ammonium persulfate and 4.36g of potassium dichromate and dissolve it in another acid solution, and call this solution B. The above mixture A and solution B were stirred uniformly and then cooled to 0°C. The solution B was slowly dropped into the mixture A, and the oxidative polymerization reaction occurred at 0°C, and the reaction time was 4h. After the reaction, the foamed aluminum surface modified with doped polyaniline was taken out, and washed repeatedly with deionized water and absolute ethanol until the filtrate was colorless, transparent and neutral. The obtained product was treat...

Embodiment 2

[0026] The method is the same as in Example 1, except that the metal foam is adjusted to nickel foam. The electromagnetic shielding effectiveness of a material with a thickness of 0.4mm is about 92dB at an electromagnetic wave frequency of 8.2-12.4GHz. The electromagnetic shielding effectiveness of materials is listed in Table 1.

Embodiment 3

[0028] The method is the same as in Example 1, except that the metal foam is adjusted to silver foam. The electromagnetic shielding effectiveness of a material with a thickness of 0.4mm is about 94dB at an electromagnetic wave frequency of 8.2-12.4GHz. The electromagnetic shielding effectiveness of materials is listed in Table 1.

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Abstract

The invention discloses a foam metal-doped polyaniline electromagnetic shielding material and a preparation method thereof. The foam metal-doped polyaniline electromagnetic shielding material is characterized in that foam metal is used as a substrate, and the surface is modified with a doped polyaniline coating layer. The foam metal-doped polyaniline electromagnetic shielding material has the advantages that the electromagnetic wave can be effectively reflected in inner holes of the foam metal, so that the effective path of the electromagnetic wave penetrating through the material is extended; the doped polyaniline coating layer modified at the surface of the foam metal can effectively absorb the electromagnetic wave, so that the synergistic effect between the wave-absorbing type polyaniline modifying layer and the reflective foam metal substrate is realized, thereby further improving the electromagnetic function of the material; the polymerizing condition is simple, the obtaining of reaction raw materials is easy, and the operability is strong; the production cost is low, the large-scale industrial production is easy, and the like.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic shielding, and specifically relates to an electromagnetic shielding functional material, in particular to a foamed metal-doped polyaniline electromagnetic shielding material, and a foamed metal-doped polyaniline electromagnetic shielding material prepared by an in-situ chemical oxidation polymerization method. Methods of shielding materials. Background technique [0002] With the rapid development of science and technology and the electronic industry, more and more electronic products have entered people's lives. While they bring convenience and fashion to people's lives, they also bring electromagnetic radiation that is difficult to detect. The electromagnetic interference generated by electromagnetic radiation affects the performance of electronic products, affects their normal work and will cause serious interference to the surrounding electronic equipment, causing their working procedu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02C08K7/24H05K9/00
CPCC08G73/0266C08K7/24H05K9/0081
Inventor 张扬邱穆楠温变英
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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