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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.

Active Publication Date: 2021-07-23
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method of the invention is easy to operate and is convenient for large-scale production; the obtained composite wave-absorbing material can not only overcome the shortcomings of single ferromagnetic material such as high density, easy agglomeration, narrow wave-absorbing frequency band and poor weather resistance, but also has light weight, corrosion resistance, good The mechanical and absorbing properties of

Method used

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

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Embodiment

[0043] Preparation of nickel submicron spheres

[0044] NiCl 2 ·6H 2 O (1.2g), sodium acetate (3.0g) and trisodium citrate dihydrate (0.2g) were dispersed in a mixed solution of glycerol (30mL) and distilled water (10mL); after stirring for 1.5h, the homogeneous suspension Transfer to a Teflon-lined stainless steel autoclave; dissolve sodium hydroxide NaOH (1.6 g) and sodium hypophosphite monohydrate NaH in 20 mL of distilled water 2 PO 2 ·H 2 O (3.2 g) was slowly poured into the autoclave, and after reacting at 140° C. for 15 h, the solution was cooled to room temperature. Wash the resulting gray precipitate several times with distilled water and absolute ethanol, collect it with a magnet, and finally dry it under vacuum at 60°C for 12 hours to obtain the product nickel submicron spheres. The SEM image of the resulting nickel submicron spheres can be found in figure 1 , it can be seen that the nickel submicron spheres are uniformly dispersed.

[0045] Preparation of ni...

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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.

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

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08K9/10C08K7/18C08J5/18
CPCC08J5/18C08J2327/16C08K7/18C08K9/10C08L27/16
Inventor 王广胜沈讯杨树豪王慧雅
Owner BEIHANG UNIV
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