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Ionic gel/conductive polymer electromagnetic shielding material, and preparation method and application thereof

A technology of electromagnetic shielding material and conductive polymer, which is applied in the direction of magnetic field/electric field shielding, electrical components, etc., to achieve the effect of good compatibility, good conductivity and good electromagnetic shielding effect

Inactive Publication Date: 2020-12-04
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, there is no report about ion gel / conductive polymer electromagnetic shielding material

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023]In this embodiment, the ionic liquid is 1-ethyl-3-methylimidazole chloride ([EMIM]Cl), the polymer monomer is acrylic acid (AA), and the crosslinking agent is polyethylene glycol diacrylate ( PEGDA), the initiator is the initiator benzoyl peroxide (BPO), and the conductive polymer is polyaniline. The specific process is: mix [EMIM]Cl, AA and polyaniline in a mass ratio of 60:30:10, and then add PEGDA and BPO, the contents of which are 0.5wt% and 1wt% of the AA content, and stir evenly to obtain The solution was transferred to the mold and reacted at 70°C for 12 hours to obtain an ion gel / polyaniline composite material. The test results show that the electromagnetic shielding effectiveness of the 1mm thick composite material at 8-12GHz is about 22dB.

Embodiment 2

[0025]In this embodiment, 1-ethyl-3-methylimidazole bistrifluorocarboximide ([EMIM]TFSI) is selected as the ionic liquid, and poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF -co-HFP) as the polymer substrate, polypyrrole as the conductive polymer, and acetone as the solvent. The specific process is: mixing the ionic liquid, PVDF-co-HFP and polypyrrole in a mass ratio of 60:30:10, then dissolving the raw materials in acetone, and coating the resulting solution in a mold at room temperature or The acetone is volatilized under heating to obtain the ion gel / polypyrrole composite material. The test results show that the electromagnetic shielding effectiveness of the 1mm thick composite material at 8-12GHz is about 21dB.

Embodiment 3

[0027]In this embodiment, 1-butyl-3-methylimidazole tetrafluoroborate is selected as the ionic liquid, N-isopropylacrylamide (NIPAM) is used as the polymer monomer, and polyethylene glycol diacrylate ( PEGDA) is used as the crosslinking agent, dibenzyl peroxide (BPO) is used as the initiator, and the PEDOT:PSS suspension is used as the conductive polymer. The specific process is: mixing the raw materials uniformly according to a certain ratio, wherein the mass ratio of ionic liquid, NIPAM and PEDOT:PSS is 60:30:10, and the content of PEGDA and BPO are 0.5wt% and 1wt% of the NIPAM content, respectively. The resulting mixture is reacted at 70°C for 12 hours to obtain an ion gel / conductive polymer composite material. The test results show that the electromagnetic shielding effectiveness of the 1mm thick composite material is about 20dB at 8-12GHz.

[0028]The ionic gel / conductive polymer electromagnetic shielding materials prepared in the foregoing embodiments can all be applied in the fi...

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Abstract

The invention relates to the field of electromagnetic shielding materials, and concretely relates to an ionic gel / conductive polymer electromagnetic shielding material, a preparation method thereof, and application of the ionic gel / conductive polymer electromagnetic shielding material in the field of electromagnetic shielding. The ionic gel / conductive polymer composite material is prepared by taking the ionic gel as a solid base material and taking the conductive polymer as a conductive filler. The ionic gel has good electrical conductivity and a good electromagnetic shielding effect. The ionic liquid and the conductive polymer have good compatibility, so that the mechanical property of the composite material is improved. Therefore, the preparation method has the characteristics of simplicity in operation, low cost and the like, and the prepared material has excellent flexibility and electromagnetic shielding effect and has wide application potential.

Description

Technical field[0001]The invention relates to the field of electromagnetic shielding materials, in particular to an electromagnetic shielding material of ion gel / conductive polymer, a preparation method and application thereof.[0002]technical background[0003]With the widespread application of electronic equipment and communication technology in various fields of life, electromagnetic waves, as a carrier of information transmission, have penetrated into all aspects of our lives. Electromagnetic wave energy propagates around in the form of waves without returning to the field source, which is called electromagnetic wave radiation. Excessive and disordered electromagnetic radiation will bring a series of negative effects, which is called electromagnetic pollution.[0004]At present, whether it is to shield the interference of external electromagnetic waves or prevent the leakage of internal electromagnetic information, the most effective means to eliminate electromagnetic pollution is to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/08C08L73/02C08L27/16C08L79/04C08L25/18C08L65/00C08K5/3445C08K5/55H05K9/00
CPCC08L51/08C08L27/16H05K9/0081C08L2205/03C08L2201/04
Inventor 聂俊孙靖先
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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