Organic polymeter as electromagnetic shielding material and its prepn process

An electromagnetic shielding material, polymer technology, applied in the direction of magnetic/electric field shielding, electrical components, etc., can solve the problems of insufficient conductivity, poor processability, difficult adjustment of shielding effectiveness, etc., and achieve good vibration resistance and impact resistance , stable electrical and chemical properties, and improved electromagnetic shielding performance

Inactive Publication Date: 2007-03-21
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

However, they all have the disadvantage of low overall shielding effectiveness.
The reason is that they can only adjust certain influencing factors in the electromagnetic shielding material alone, but cannot adjust the two decisive parameters of electrical conductivity and magnetic permeability at the same time.
At the same time, metals and magnetic ferrites still have shortcomings such as heavy weight, high loss, difficult implementation, a

Method used

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  • Organic polymeter as electromagnetic shielding material and its prepn process
  • Organic polymeter as electromagnetic shielding material and its prepn process
  • Organic polymeter as electromagnetic shielding material and its prepn process

Examples

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[0024] Add 20 g of meta-ferrocenyl aniline to a three-necked flask containing 100 mL of hydrochloric acid, slowly drop an equimolar amount of ammonium persulfate hydrochloric acid solution, pass nitrogen protection, and react at room temperature for 12 hours to obtain a blue-black solid. Filter, wash with hydrochloric acid, distilled water and absolute ethanol successively, and vacuum dry for 12 hours to obtain 18.5 g of target product. Using tetrahydrofuran as the solvent, the number average molecular weight n (degree of polymerization) is 180 when tested by gel chromatography.

[0025] Mix 4g of the organic polymer electromagnetic shielding material with dual electrical and magnetic properties prepared in the above-mentioned embodiment with 3g of paraffin wax. After the paraffin is melted, a sample of 20.1mm, 10.2mm wide and 2.91mm thick is pressed with a mold. Use the four-probe method to test its conductivity at 10 -6 ~10S / cm; with HP4291B impedance analyzer, in the test range...

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Abstract

The organic polymer as electromagnetic shielding material and its preparation process belongs to the field of material science and technology. The organic polymer as electromagnetic shielding material has organic polymer of polymerization degree n of 20-400 in the shown structure as the main component. It is prepared with the monomer with aniline and ferrocene as main material, and through slowly dropping oxidant solution into the monomer solution to polymerize and adding proper amount of dopant. The polymer has in its molecular structure polyaniline as the conducting mother substance and ferrocene as the magnetic radical, so that it has both electric conductivity and magnetism. It has high comprehensive shielding effect, low density, wide applicable frequency range, low temperature coefficient, low magnetic loss and other excellent characteristics, and may find wide application in electromagnetic shielding, wave absorption, etc.

Description

technical field [0001] The invention belongs to functional polymer materials in the field of material technology, in particular to a ferrocene group-containing magnetically conductive high polymer material with polyaniline as a matrix and a preparation method thereof, in particular to the field of electromagnetic shielding applications. Background technique [0002] With the rapid development of modern electronic industry and information industry, the application of various electronic instruments and equipment is also increasing day by day. The main obstacle to the normal functioning of equipment and systems. At the same time, the pollution of electromagnetic waves to human working and living environments has become a serious social problem, threatening human health, and the leakage of electromagnetic radiation often leads to failure of automatic control systems. Risk of misoperation and information theft. [0003] In order to effectively suppress the radiation, leakage and...

Claims

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Application Information

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IPC IPC(8): C08L79/02C08G73/02C08K5/56H05K9/00
Inventor 李元勋刘颖力张怀武燕文琴李少帅
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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