A method for preparing a lightweight carbon aerogel material for electromagnetic shielding

By growing Ni2P nanoparticles on the surface of carbon aerogel, a lightweight, efficient, and corrosion-resistant electromagnetic shielding material was prepared, solving the problems of high density, poor corrosion resistance, and high cost of existing materials, and achieving an electromagnetic shielding effect suitable for industrial production.

CN117163942BActive Publication Date: 2025-12-16SINOSTEEL MAANSHAN INST OF MINING RES CO LTD +1
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Patent Information

Application Number
CN202311183882.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-09-14
Publication Date
2025-12-16
Estimated Expiration
2043-09-14

AI Technical Summary

Technical Problem

Existing electromagnetic shielding materials are high-density, not corrosion-resistant, have high raw material costs, and long manufacturing cycles, making them difficult to use on a large scale in industrial production.

Method used

Using carbon aerogel as a substrate, small-sized Ni2P nanoparticles are grown on its surface to form a lightweight, efficient, and corrosion-resistant electromagnetic shielding material. The three-dimensional network nanoporous structure of carbon aerogel and the electromagnetic wave absorption properties of Ni2P are utilized, and the nucleation and growth rate of Ni2P are controlled to adjust its distribution on carbon aerogel microspheres.

Benefits of technology

Lightweight, efficient, and corrosion-resistant electromagnetic shielding materials have been prepared, exhibiting high specific area, high conductivity, and good electromagnetic shielding effectiveness, making them suitable for large-scale industrial production.

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Abstract

The application discloses a preparation method of carbon aerogel material for light electromagnetic shielding, and comprises the following steps: adding resorcinol, phloroglucinol, a template agent and formaldehyde into pure water, stirring and dissolving to obtain a precursor solution; adding the precursor solution into white oil containing a surfactant, emulsifying, heating in an oil bath and fully reacting; centrifugal separation to obtain powder, high-temperature carbonization, dispersion in oleylamine, addition into a stock solution containing nickel acetylacetonate, triphenylphosphine and oleylamine, high-temperature reaction and cooling, addition of a mixture of hexane and ethanol to obtain a product; centrifugal separation and washing to obtain light high-electromagnetic-shielding carbon aerogel. The carbon aerogel material for light electromagnetic shielding prepared by the method has the advantages of small density, high efficiency, corrosion resistance, high electromagnetic shielding efficiency, high product yield and the like, and by controlling the nucleation and growth rate of Ni2P, the Ni2P nanoparticles can be uniformly grown on the carbon aerogel microspheres, and the method is suitable for application in large-scale industrial production.
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