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Conductive polymer wave-absorbing material

A technology of conductive polymers and wave-absorbing materials, applied in the field of wave-absorbing materials, can solve the problems of low conductivity, low bandgap width, no literature and patent reports, and no data on wave-absorbing performance, etc., to achieve light weight, thin coating effect

Inactive Publication Date: 2009-11-25
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent 03117132.X discloses conductive polymer polyaniline coated in magnetic particles Fe 3 o 4 , Fe 2 o 3 、Co 2 o 3 , NiO, which is conductive and magnetic, and the saturation magnetization value is given, but there is no absorbing performance data
Chinese patent 98111335.X discloses the preparation of polypyrrole / ferrite / polypyrrole composite film by electrochemical method, which has conductivity and magnetism, and the conductivity, tensile strength and saturation magnetization value of the film are given, but it does not Give the absorbing performance data
[0005] Poly(3,4dioxyethyl)thiophene (PEDOT) is a conductive polymer family with high conductivity, low bandgap width, and excellent stability. It has been commercially applied in antistatic coatings and solid capacitors. However, there are no literature and patent reports as a wave-absorbing material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) A water-soluble polymer polyvinyl alcohol (PVA) solution with a mass concentration of 3% is prepared using a mixture of water and acetonitrile with a volume ratio of 10:1 as a solvent.

[0035]2) Add oxidant iron trichloride to the water-soluble polymer solution prepared in step 1), stir and dissolve, the molar concentration of ferric chloride in polyvinyl alcohol (PVA) aqueous solution is 0.05mol / L, obtain trichloride A mixture of iron and polyvinyl alcohol (PVA).

[0036] 3) under stirring conditions, the acid dopant β-naphthalenesulfonic acid is added to the mixed solution obtained in step 2), the molar concentration of the acid dopant β-naphthalenesulfonic acid in the mixed solution is 0.3mol / L, After stirring evenly, add 3,4 dioxyethylthiophene (EDOT), wherein: the molar weight of the added 3,4 dioxyethylthiophene (EDOT) is 0.5 of the ferric chloride molar weight added in step 2). times. Stirring was continued at room temperature for 24 hours to obtain a black...

Embodiment 2

[0040] 1). The mixture of water and acetonitrile with a volume ratio of 5:1 is used as a solvent to prepare a 5% polyvinylpyrrolidone (PVP) solution with a mass concentration.

[0041] 2). Add ammonium persulfate as oxidant in the polyvinylpyrrolidone (PVP) solution prepared in step 1), stir and dissolve evenly, the molar concentration of ammonium persulfate in the solution is 0.1mol / L, and obtain ammonium persulfate and polyethylene Pyrrolidone (mixture of PVP.

[0042] 3) under agitation, add 3,4 dioxyethylthiophene (EDOT) to the mixed solution obtained in step 2), wherein: the molar weight of the added 3,4 dioxyethylthiophene (EDOT) is the step 2) 2 times the molar amount of ammonium persulfate added in the mixture, and continued to stir and react at room temperature for 72 hours to obtain a black emulsion containing poly(3,4 dioxyethyl)thiophene (PEDOT) hollow microspheres.

[0043] 4) Dry the black emulsion in step 3) at 40° C. to obtain a dark gray blocky solid. The so...

Embodiment 3

[0046] 1) A water-soluble polymer polyvinylpyrrolidone (PVP) solution with a mass concentration of 2% is prepared by using a mixture of water and acetonitrile with a volume ratio of 6:1 as a solvent.

[0047] 2) in the water-soluble macromolecule solution of step 1) adding oxidant chloroauric acid, stirring and dissolving, the molar concentration of chloroauric acid in polyvinylpyrrolidone (PVP) aqueous solution is 0.3mol / L, obtains chloroauric acid and polyvinylpyrrolidone (PVP) aqueous solution A mixture of vinylpyrrolidone (PVP).

[0048] 3) Under stirring conditions, add the acid dopant p-toluenesulfonic acid into the mixed solution obtained in step 2), the molar concentration of the acid dopant p-toluenesulfonic acid in the mixed solution is 0.1mol / L, stir well Finally, add 3,4 dioxyethyl thiophene (EDOT), wherein: the molar amount of 3,4 dioxyethyl thiophene (EDOT) added is 3 times of the molar amount of ferric chloride added in step 2). Stirring was continued at room t...

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Abstract

The invention belongs to the technical field of wave-absorbing materials, and in particular relates to a conductive polymer wave-absorbing material. The material consists of poly(3,4-ethylenedioxythiophene) (PEDOT) microspheres and epoxy resin or organic binder such as polyurethane and the like, wherein the content of the conductive polymer poly(3,4-ethylenedioxythiophene) microspheres in the conductive polymer wave-absorbing material is 20 to 80 percent by mass percentage. The conductive polymer wave-absorbing material has the remarkable advantages of thin coating, light weight and the like, has good wave-absorbing performance on a frequency band of between 2 and 18GHz, has the maximum absorption of 21dB at the frequency of 16GHz particularly, and has good prospect as a radar wave-absorbing material.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing materials, in particular to conductive polymer wave-absorbing materials. Background technique [0002] Absorbing materials are a class of materials that can absorb electromagnetic wave energy projected onto its surface and convert it into heat energy through material loss. In recent years, with the development and deepening of research on radar absorbing materials, various new types of absorbing materials have emerged, aiming to improve the survival, penetration, and especially deep strike capabilities of stealth weapons. As a new type of wave-absorbing material, conductive polymer has a good application prospect in terms of meeting the requirements of thin material (layer), light (weight), wide (frequency) and strong (absorbing performance). [0003] Conductive polymer refers to a polymer material that can conduct electricity after chemical or electrochemical doping with a л-conjugated lo...

Claims

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Application Information

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IPC IPC(8): C08L65/00C08L63/00C08L75/04H01B1/20
Inventor 胡秀杰周树云周诗怡陈萍孙承华
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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