Method for preparing composite wave-absorbing material and the prepared composite wave-absorbing material

A composite absorbing material and sub-micron technology, applied in the field of nanomaterials, can solve the problems of poor weather resistance, narrow absorbing frequency band, easy agglomeration, etc., and achieve the effects of optimizing absorbing performance, increasing absorbing capacity and stabilizing reaction.
CN110982200BActive Publication Date: 2021-07-23BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2021-07-23

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Abstract

The invention relates to a method for preparing a composite wave-absorbing material and the prepared composite wave-absorbing material. The method is simple to operate and is convenient for large-scale production; the obtained composite wave-absorbing material can not only overcome the shortcomings of single ferromagnetic materials such as high density, easy agglomeration, narrow wave-absorbing frequency band, and poor weather resistance, but also has light weight, corrosion resistance, and good mechanical properties. and absorbing performance. The method comprises the following steps: step I: using a hydrothermal method to synthesize nickel submicron spheres; step II: using the nickel submicron spheres obtained in step I to prepare phenolic resin pyrolytic carbon-coated nickel submicron spheres by aldehyde resin pyrolysis carbon method Micron sphere composite material; step III: use the phenolic resin pyrolytic carbon coated nickel submicron sphere composite material obtained in step II, and prepare the composite material of phenolic resin pyrolytic carbon coated nickel submicron sphere and polyvinylidene fluoride by ultrasonic method Material.
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Description

technical field

[0001] The invention relates to a method for preparing a composite wave-absorbing material, which includes synthesizing nickel submicron spheres by a hydrothermal method. The present invention also relates to a composite wave-absorbing material prepared by the method, which is a composite wave-absorbing material Ni@C / PVDF. The invention belongs to the technical field of nanometer materials. Background technique

[0002] In recent years, with the continuous advancement of electronic technology, the application of various electronic equipment has brought us convenience, but also brought electromagnetic radiation hazards. Electromagnetic waves will interfere with each other in space, resulting in damage to the communication system, failure of control, and unsmooth communication. With the increasing demand for green life, the hazards of electromagnetic radiation have gradually attracted people's attention, and after water pollution, air pollution, and noise p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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