A kind of three-dimensional foam type composite wave absorbing material and preparation method thereof

A composite wave-absorbing material, foam-type technology, applied in the direction of magnetic/electric field shielding, electrical components, etc., to achieve the effect of improving electromagnetic parameters

Active Publication Date: 2020-09-22
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are few studies on the application of transition metal sulfides to electromagnetic wave absorbing materials. Researchers mainly focus on the application of transition metal sulfides in electrocatalysis, photocatalysis, and lithium-ion batteries.

Method used

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  • A kind of three-dimensional foam type composite wave absorbing material and preparation method thereof
  • A kind of three-dimensional foam type composite wave absorbing material and preparation method thereof
  • A kind of three-dimensional foam type composite wave absorbing material and preparation method thereof

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Effect test

preparation example Construction

[0026] A method for preparing a composite wave-absorbing material prepared by a one-step method, characterized in that the steps are as follows:

[0027] Step 1: Alternately clean the metal foam material with 99.9% volume concentration of absolute ethanol and 99.9% volume concentration of ethyl acetate, and ultrasonically clean it in deionized water for 30 minutes to remove surface impurities.

[0028] Step 2: Dissolving the transition metal sulfide in deionized water to obtain a metal sulfide solution.

[0029] Step 3: Transfer the metal foam material removed from impurities in step 1 and the metal sulfide solution obtained in step 2 to the hydrothermal reaction kettle, seal the kettle, put the hydrothermal reaction kettle in an oven and keep it at 200-240°C, and react After 18-24 hours, cool naturally to room temperature, open the kettle, filter and wash several times until the filtrate becomes colorless and transparent, and dry to obtain a transition metal sulfide supported...

Embodiment 1

[0040] After 0.6g of nickel foam was ultrasonically cleaned with absolute ethanol and ethyl acetate, it was dried for use, 0.3g of thiourea was dissolved in 160 ml of deionized water, stirred ultrasonically for 30 min, and the above-mentioned nickel foam and solution were transferred to 200 ml of polytetrafluoroethylene In the vinyl fluoride hydrothermal reaction kettle, seal the kettle and react at 200°C for 20 hours; after the reaction is stopped, the system will automatically cool down to room temperature, open the kettle, wash the reaction product repeatedly with deionized water, dry it at room temperature, and seal it for storage until use.

Embodiment 2

[0042] After 0.6g of nickel foam was ultrasonically cleaned with absolute ethanol and ethyl acetate, it was dried for use, 0.2g of thiourea was dissolved in 160 ml of deionized water, stirred ultrasonically for 30 min, and the above nickel foam and the solution were transferred to 200 ml of polytetrafluoroethylene In the vinyl fluoride hydrothermal reaction kettle, seal the kettle and react at 200°C for 20 hours; after the reaction is stopped, the system will automatically cool down to room temperature, open the kettle, wash the reaction product repeatedly with deionized water, dry it at room temperature, and seal it for storage until use.

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Abstract

The invention provides a three-dimensional foam type composite wave absorbing material and a preparation method thereof. The method is characterized in that a three-dimensional skeleton NiZNi3S2 composite material is prepared by a one-step method, by adjusting the ratio of foam metal to transition metal sulfide, the surface morphology and electromagnetic parameters of the composite material are adjusted to adapt to microwave absorbing in different wavelength bands. The method is advantaged in that problems of high density, narrow frequency band and poor impedance matching of traditional magnetic components in the wave absorbing are solved, structural advantages of porous metal, light weight and high specific surface area are fully utilized, the surface-controllable transition metal sulfidedielectric loss type material improves impedance matching of the metal foam, and the method has great practical application value in the production of electromagnetic wave absorbing materials.

Description

technical field [0001] The invention belongs to the technical field of composite materials and fine chemicals, and relates to a foam-type composite wave-absorbing material prepared by a one-step method and a preparation method thereof. Background technique [0002] The rapid development of modern electronic technology provides great convenience to people's life, but also brings serious electromagnetic pollution. It not only endangers people's health, but also poses a threat to the information security of electronic equipment and the system stability of surrounding equipment. Therefore, the development of high-performance electromagnetic absorbing materials is an effective way to solve the above problems. [0003] In order to adapt to the air permeability of electromagnetic absorbing devices and the integration of electronic components, air-permeable electromagnetic absorbing materials have gradually become a new research hotspot. At present, domestic research on the use of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00
CPCH05K9/0081
Inventor 王汝敏郑远雷博张卫东朱庆齐暑华
Owner NORTHWESTERN POLYTECHNICAL UNIV
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