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Preparation method of electromagnetic shielding material based on carbon material, polypyrrole and alpha-iron sesquioxide

An electromagnetic shielding material and a technology of ferric oxide, which is applied in the field of preparation of electromagnetic shielding materials, can solve problems such as the performance disadvantage of electromagnetic shielding materials, and achieve the effects of good electromagnetic shielding performance, simple preparation method and reduction of secondary radiation.

Inactive Publication Date: 2017-03-15
NORTHEAST FORESTRY UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem of the performance disadvantage of the existing single-component electromagnetic shielding material, and provides a preparation method of an electromagnetic shielding material based on three components of carbon material, polypyrrole and α-ferric oxide

Method used

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  • Preparation method of electromagnetic shielding material based on carbon material, polypyrrole and alpha-iron sesquioxide
  • Preparation method of electromagnetic shielding material based on carbon material, polypyrrole and alpha-iron sesquioxide
  • Preparation method of electromagnetic shielding material based on carbon material, polypyrrole and alpha-iron sesquioxide

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specific Embodiment approach 1

[0026] Embodiment 1: The preparation method of an electromagnetic shielding material based on three components of carbon material, polypyrrole and α-ferric oxide described in this embodiment is specifically carried out according to the following steps:

[0027] 1. Immersing the carbon material in concentrated nitric acid with a mass percentage of 65% for 0.1h to 100h to obtain the acid-treated carbon material;

[0028] The carbon material is carbon aerogel, carbon nanotube, graphene or carbon fiber;

[0029] The carbon airgel is prepared according to the following steps: the container containing the cellulose airgel is placed in a high-temperature pyrolysis device, and an inert gas is passed into the high-temperature pyrolysis device for 5 minutes to 20 minutes. Under protection, at a heating rate of 0.1°C / min to 20°C / min, the temperature of the high-temperature pyrolysis device is first raised to 200°C to 800°C, and kept at a temperature of 200°C to 800°C for 1h to 10h , and...

specific Embodiment approach 2

[0039] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the carbon airgel described in step 1 is prepared according to the following steps: the cellulose airgel container is placed in a high-temperature pyrolysis device , into the high-temperature pyrolysis device into the inert gas for 10 minutes, under the protection of the inert gas, with a temperature increase rate of 5 ℃ / min, the temperature of the high-temperature pyrolysis device is first raised to 500 ℃, and the temperature is 500 ℃ heat preservation for 1 hour, then raise the temperature of the high-temperature pyrolysis device from 500 to 1000 degrees Celsius at a heating rate of 5 degrees Celsius / min, and keep the temperature at 1000 degrees Celsius for 2 hours, and then lower the temperature at a rate of 5 degrees Celsius / min, the temperature of the high-temperature pyrolysis device is lowered from 1000°C to 500°C, and after cooling down, the carbon airgel is obtained by natural cooli...

specific Embodiment approach 3

[0040] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: in step 1, the carbon material is immersed in concentrated nitric acid with a mass percentage of 65% for 24 hours. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to preparation methods of electromagnetic shielding materials, in particular to a preparation method of an electromagnetic shielding material based on a carbon material, polypyrrole and alpha-iron sesquioxide, and aims to solve the problem that existing single-component electromagnetic shielding materials are disadvantageous in performance. The preparation method includes: 1, preparing a carbon material subjected to acid treatment; 2, preparing the carbon material impregnated; 3, preparing the carbon material subjected to high-temperature treatment; 4, impregnating the carbon material subjected to high-temperature treatment in a mixed solution of FeCl3.6H2O and p-toluene sulfonamide, and freely reacting with pyrrole to complete the preparation method. The preparation method is used for preparing the electromagnetic shielding material based on the carbon material, polypyrrole and alpha-iron sesquioxide.

Description

technical field [0001] The invention relates to a preparation method of an electromagnetic shielding material. Background technique [0002] With the rapid development of commercial, military and technological electronic products and communication equipment, electromagnetic pollution has caused widespread concern. Electromagnetic radiation can not only interfere with the normal operation of machines, cause energy, time and money losses, but even threaten human health. Therefore, it is imperative to intensify efforts to develop environmentally friendly and high-performance electromagnetic shielding materials. Carbon materials such as graphene and carbon nanotubes have been widely used in the field of electromagnetic shielding due to their excellent electrical conductivity, corrosion resistance, oxidation resistance, and heat resistance. Carbon aerogel is a light, porous carbon material, which is composed of cross-linked carbon fiber network, so carbon aerogel also has excel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/06C08K9/00C08K9/02C08K9/04C08K7/24C08K3/04C08K7/06C08K3/22
CPCC08G73/0611C08K3/04C08K3/22C08K7/06C08K7/24C08K9/00C08K9/02C08K9/04C08K2003/2272C08K2201/011
Inventor 李坚万才超焦月包文慧
Owner NORTHEAST FORESTRY UNIVERSITY
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