Magnetic carbon nanofiber aerogel wave-absorbing material and preparation method

A technology of carbon nanofibers and nanofibers, applied in the field of wave-absorbing materials, can solve problems such as unfavorable interface polarization and related losses, hierarchical porous structure damage, low-efficiency utilization of fillers, etc., to improve application value, strong magnetic loss, strong The effect of interface polarization
CN110809395AInactive Publication Date: 2020-02-18SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI JIAO TONG UNIV
Publication Date
2020-02-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a magnetic carbon nanofiber aerogel wave-absorbing material, which includes carbon nanofibers and magnetic nanoparticles. The magnetic nanoparticles are dispersed on the carbonnanofibers. The carbon nanofibers are carbon nanofibers pyrolyzed by a biomass material, have fiber diameters of 30 to 50 nm and an aspect ratio of 1000 to 3000. The magnetic carbon nanofiber aerogelwave-absorbing material provided by the present invention has a high aspect ratio, and has a porous network structure formed therein by staggered fibers so as to contribute to the construction of a conductive network under low fillers, and obtain the best wave-absorbing performance under low fillers. Further, the porous network structure filled with low fillers and formed by the staggered fibersprovides the magnetic carbon nanofiber aerogel wave-absorbing material with light and flexible features, improves the application value of the wave-absorbing material. In addition, the wave-absorbingmaterial has strong interfacial polarization and magnetic loss so as to contribute to the loss of incident electromagnetic waves.
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Description

technical field

[0001] The invention relates to the field of wave-absorbing materials, in particular to a magnetic carbon nanofiber airgel wave-absorbing material and a preparation method. Background technique

[0002] With the development of science and technology and the electronic industry, the application of various electronic devices has gradually increased, and electromagnetic wave radiation has become a new social hazard. On the one hand, the radiated electromagnetic waves will affect the normal operation of the surrounding electrical equipment and systems. On the other hand, long-term exposure to electromagnetic wave radiation will seriously affect people's physical and mental health. As an effective electromagnetic wave absorber, the microwave-absorbing material is increasingly prominent in the field of modern science and technology. First of all, having strong absorption capacity in the required absorption band is the basic requirement for absorbing materials. In ...

Claims

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