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Conducting polymer wave-absorbing material with double-shell structure and preparation method thereof

A technology of conductive polymers and wave-absorbing materials, applied in the field of wave-absorbing materials, to achieve the effect of strong wave-absorbing performance

Active Publication Date: 2014-09-10
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

Using multiple cavities in the multi-shell conductive polymer to absorb and attenuate electromagnetic waves through multiple reflections, obtain a conductive polymer with a multi-shell structure that is both light in weight and high in absorption strength as a wave-absorbing material. There are no literature and patent reports.

Method used

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  • Conducting polymer wave-absorbing material with double-shell structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a) According to the literature Chinese Journal of Physics2010,48,417-423, the preparation of Fe by solvothermal method 3 o 4 Hollow microspheres; 3.2436g FeCl 3 ·6H 2 O is placed in a Erlenmeyer flask, add 30mL of ethylene glycol, stir to make it fully dissolved; add 1.0871g of urea under magnetic stirring, and continue to stir for 30 minutes; In the reaction kettle, close it and raise the temperature to 200°C for 12 hours of reaction; after the reaction is complete, cool it down to room temperature naturally, centrifuge the solution containing the brown-black precipitate in the kettle, and wash the brown-black precipitate with water to remove impurities; vacuum Dry at 60°C for 12 hours to obtain a brown-black powdery solid, that is, to obtain Fe with a particle size of 400-600nm and a shell thickness of 50-70nm. 3 o 4 hollow microspheres;

[0027] b) the Fe prepared in step a) 3 o 4 Hollow microspheres are dispersed in water containing polyvinyl alcohol (PVA), a...

Embodiment 2

[0034] a) Fe 3 o 4 Hollow microsphere is identical with embodiment 1;

[0035] b) the Fe prepared in step a) 3 o 4 The hollow microspheres were dispersed in water containing polyvinylpyrrolidone (PVP), and the Fe 3 o 4 The hollow microspheres are dispersed evenly, then p-toluenesulfonic acid is added to obtain a mixed solution; wherein, Fe in the mixed solution 3 o 4 The concentration is 1.0×10 -2 mol / L, the mass concentration of polyvinylpyrrolidone (PVP) is 8%, and the concentration of p-toluenesulfonic acid is 0.4mol / L;

[0036] c) Add 3,4-dioxyethylthiophene to the mixed solution obtained in step b) under stirring condition, wherein the concentration of 3,4-dioxethylthiophene in the mixed solution is 2.0×10 -1 mol / L, continued to stir at room temperature for 12 hours to obtain a mixed solution;

[0037] d) under agitation, add ammonium persulfate to the mixed solution obtained in step c), so that the concentration of ammonium persulfate in the mixed solution obtai...

Embodiment 3

[0042] a) Fe 3 o 4 Hollow microsphere is identical with embodiment 1;

[0043] b) the Fe prepared in step a) 3 o 4 Hollow microspheres are dispersed in water containing polyvinyl alcohol (PVA), and ultrasonicated for about 5 minutes to make Fe 3 o 4 The hollow microspheres are dispersed evenly, then β-naphthalenesulfonic acid is added to obtain a mixed solution; wherein, Fe in the mixed solution 3 o 4 The concentration is 4.0×10 -3 mol / L, the mass concentration of polyvinyl alcohol is 4%, and the concentration of β-naphthalenesulfonic acid is 0.3mol / L;

[0044] c) Add 3,4-dioxyethylthiophene to the mixed solution obtained in step b) under agitation, wherein the concentration of 3,4-dioxyethylthiophene in the mixed solution is 4.0×10 -2 mol / L, continued to stir at room temperature for 5 hours to obtain a mixed solution;

[0045] d) under agitation, add potassium persulfate to the mixed solution obtained in step c), so that the concentration of potassium persulfate in t...

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Abstract

The invention belongs to the technical field of a wave-absorbing material, and particularly relates to a conducting polymer wave-absorbing material with a double-shell structure and a preparation method thereof. The method comprises the steps as follows: a poly(3,4-dioxoethyl) thiophene hollow microsphere with a double-shell structure is dispersed into an organic binding agent, so as to obtain the conducting polymer wave-absorbing material with the double-shell structure, wherein the mass percent of the poly(3,4-dioxoethyl) thiophene hollow microsphere with the double-shell structure in the conducting polymer wave-absorbing material is 20-50%. The conducting polymer wave-absorbing material disclosed by the invention has the outstanding advantages of thin coating, light weight and strong electromagnetic wave absorption performance, and has wave absorption performance on a frequency band of which the electromagnetic wave is 2-18GHz, and the maximal absorptivity (reflectivity) of the electromagnetic wave can be up to -32.4dB, and is obviously superior to the wave absorption strength of the poly(3,4-dioxoethyl) thiophene hollow microspheres with a solid structure and a single-layer hollow structure. Therefore, the conducting polymer wave-absorbing material is a novel radar absorbing material with an application prospect.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing materials, in particular to a double-shell structure conductive polymer wave-absorbing material and a preparation method thereof. Background technique [0002] Absorbing materials refer to a class of materials that can absorb and attenuate incident electromagnetic wave energy 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 polymers are a class of polymer materials with л-conjugated long-chain ...

Claims

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Application Information

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IPC IPC(8): C08L65/00C08G61/12B01J13/14C09K3/00
Inventor 胡秀杰庞瑞周树云孙承华严峻孙兴明肖时卓陈萍
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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