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A kind of doped polyaniline electromagnetic shielding material with sea cucumber shape and preparation method thereof

An electromagnetic shielding material, polyaniline technology, applied in the fields of magnetic field/electric field shielding, electrical components, etc., can solve the problems of reducing the conductivity and electromagnetic shielding performance of polyaniline, poor conductivity of the stabilizer, etc., and achieves easy large-scale industrial production and production. Low cost, high operability effect

Active Publication Date: 2018-10-19
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the preparation process of this method, a macromolecular stabilizer needs to be used. Due to the poor conductivity of the stabilizer, the electrical conductivity and electromagnetic shielding performance of the prepared polyaniline are reduced to a certain extent.

Method used

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  • A kind of doped polyaniline electromagnetic shielding material with sea cucumber shape and preparation method thereof
  • A kind of doped polyaniline electromagnetic shielding material with sea cucumber shape and preparation method thereof
  • A kind of doped polyaniline electromagnetic shielding material with sea cucumber shape and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First prepare a mixed acid solution of 1.5 mol / L hydrochloric acid and 1.5 mol / L camphorsulfonic acid, the dosage of hydrochloric acid is 5 mL, and the dosage of camphorsulfonic acid is 25 mL. Divide the mixed acid solution into two equal parts, the solution containing ammonium persulfate acid is A, the concentration of ammonium persulfate is 1.31mol / L, the solution with aniline monomer dispersed is B, and the concentration of aniline monomer is 1.10 mol / L. The two mixtures of A and B were ultrasonically dispersed for 0.5h and then cooled to 0°C. Put A in a constant pressure funnel, control the temperature of B solution to 0°C, stir B solution at a stirring speed of 300 rpm, drop A solution into B drop by drop, keep the dropping speed constant, and drop after 0.5h Finished adding. The stirring reaction was continued at this temperature for 4h. After the reaction, the mixture containing the target product was suction-filtered, washed repeatedly with deionized water an...

Embodiment 2

[0025] The method is as in Example 1, except that the reaction temperature is reduced to -5°C. It is detected that the diameter of this doped polyaniline is slightly lower than that in Example 1, which is 100nm, and the length increases to 1100nm. 2 / g. The prepared material was pressed into a 0.35mm thick sheet, and its electromagnetic shielding effectiveness was tested to be about 45dB at an electromagnetic wave frequency of 8.2-12.4GHz. The material microstructure size and electromagnetic shielding effectiveness are listed in Table 1.

Embodiment 3

[0027] The method is as in Example 1, except that the reaction temperature is reduced to -10°C. It is detected that the diameter of this doped polyaniline is slightly lower than that in Example 1, which is 95nm, and the length increases to 1600nm. 2 / g. The prepared material was pressed into a thin sheet with a thickness of 0.35mm, and its electromagnetic shielding effectiveness was tested to be about 38dB at an electromagnetic wave frequency of 8.2-12.4GHz. The material microstructure size and electromagnetic shielding effectiveness are listed in Table 1.

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Abstract

The invention relates to an electromagnetic shielding functional material, in particular to a polyaniline-doped electromagnetic shielding material with a sea cucumber shape and a micro-nano secondary structure and a preparation method thereof. The polyaniline-doped electromagnetic shielding material is characterized in that the sea cucumber shape is formed, a nanometer bulge is attached to the micrometer fiber, the advantages of rough surface and large specific surface area are realized, the electromagnetic wave generates effective multiple reflection in the material, and the electromagnetic shielding property of polyaniline doping on the electromagnetic wave is greatly improved; by changing the ratio of mixing acid, concentration of monomer, and usage amount of oxidant, the electromagnetic shielding property of the whole material can be conveniently adjusted. The polyaniline-doped electromagnetic shielding material has the characteristics that the shielding efficiency is high, the shielding range is wide, the weight is light, and the cost is low; the material can be applied to the fields of communication systems, network systems, transmission systems and the like with electromagnetic shielding functions.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic shielding, and specifically relates to a functional material for electromagnetic shielding, in particular to a doped polyaniline electromagnetic shielding material with sea cucumber morphology and micro-nano secondary structure, and a chemical oxidation polymerization A method for preparing a doped polyaniline electromagnetic shielding material with sea cucumber morphology. Background technique [0002] Precision instruments and equipment often produce electromagnetic interference and electromagnetic radiation during work, which affects the normal operation of the equipment. Setting up an electromagnetic shielding layer is a simple and effective method to prevent electromagnetic interference and radiation hazards. Although electromagnetic shielding materials made of traditional metal materials have good electromagnetic shielding effects, their wide application is limited due to the shortco...

Claims

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Application Information

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