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Foam-type cobalt/carbon composite wave-absorbing material and preparation method thereof

Active Publication Date: 2020-04-10
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention proposes a foam-type cobalt / carbon composite wave-absorbing material and its preparation method, which solves the problems of uncontrollable mesopore structure and unadjustable electromagnetic wave absorption intensity of the porous cobalt / carbon composite wave-absorbing material

Method used

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  • Foam-type cobalt/carbon composite wave-absorbing material and preparation method thereof
  • Foam-type cobalt/carbon composite wave-absorbing material and preparation method thereof
  • Foam-type cobalt/carbon composite wave-absorbing material and preparation method thereof

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Embodiment 1

[0033] A preparation method of a foam-type cobalt / carbon composite absorbing material in this embodiment is carried out according to the following steps:

[0034] 1. Preparation of PS microspheres: Take 100 mL of styrene dispersion with a concentration of 0.3 g / L and wash with deionized water and sodium hydroxide solution to remove the stabilizer in the styrene raw material, and dissolve the washed styrene in 500 mL of deionized water, and 2 g of polyvinylpyrrolidone powder were added and stirred evenly, the mixed solution was passed through nitrogen for 15 min, and then 1 g of K 2 S 2 o 8 To initiate styrene polymerization; the mixed solution was stirred at a stirring speed of 300 rpm for 24 h to obtain a milky monodisperse polystyrene sol;

[0035] 2. Preparation of three-dimensional ordered PS templates: Three-dimensional ordered PS templates were obtained by suction filtration; the polystyrene sol was poured into a suction filtration device with double-layer filter pape...

Embodiment 2

[0045] A preparation method of a foam-type cobalt / carbon composite absorbing material in this embodiment is carried out according to the following steps:

[0046] 1. Preparation of PS microspheres: Take 50 mL of styrene dispersion with a concentration of 0.3 g / L and wash with deionized water and sodium hydroxide solution to remove the stabilizer in the styrene raw material, and dissolve the washed styrene in 100 mL of deionized water, and add 8 g of sodium dodecylbenzenesulfonate powder and stir evenly, the mixed solution is passed through nitrogen for 5 min, and then 5 g of K 2 S 2 o 8 To initiate styrene polymerization; the mixed solution was stirred at a stirring speed of 100 rpm for 24 h to obtain a milky monodisperse polystyrene sol;

[0047] 2. Preparation of three-dimensional ordered PS templates: Three-dimensional ordered PS templates were obtained by suction filtration; the polystyrene sol was poured into a suction filtration device with double-layer filter paper, ...

Embodiment 3

[0053] A preparation method of a foam-type cobalt / carbon composite absorbing material in this embodiment is carried out according to the following steps:

[0054] 1. Preparation of PS microspheres: Take 150 mL of styrene dispersion with a concentration of 0.3 g / L and wash it with deionized water and sodium hydroxide solution to remove the stabilizer in the styrene raw material, and dissolve the washed styrene in 400 mL of deionized water, and add 6g of triethanolamine and polyvinylpyrrolidone mixture and stir evenly, the mixed solution is passed nitrogen gas for 5 min, then add 4 gK 2 S 2 o 8 To initiate styrene polymerization; the mixed solution was stirred at a stirring speed of 200 rpm for 24 h to obtain a milky monodisperse polystyrene sol;

[0055] 2. Preparation of three-dimensional ordered PS templates: Three-dimensional ordered PS templates were obtained by suction filtration, specifically: pour polystyrene sol into a suction filtration device with double-layer filt...

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Abstract

The invention belongs to the field of material preparation, and relates to a foam-type cobalt / carbon composite wave-absorbing material and a preparation method thereof. To solve problems that pore structures are uncontrollable, electromagnetic wave absorption strength cannot be adjusted and the like in cobalt / carbon composite materials prepared by existing methods, and on the basis of constructinga porous material by fully utilizing a hard template method, the preparation method for preparing the foam-type cobalt / carbon composite wave-absorbing material based on polystyrene microsphere templates is provided. PS microspheres are adopted as hard templates and the foam-type cobalt / carbon composite material is obtained through in-situ filling, growth, template removing, calcination and otherprocessed. By adjusting the particle size of the PS microspheres, effective control of the pore structure of the composite material can be achieved, and the control method is simple. The preparation method is expected to be popularized as a universal controllable method for porous magnetic metal / carbon composite wave-absorbing materials, and lays the experimental foundation for the later establishment of a univariate relationship between the pore structure and wave absorbing performance.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a foam-type cobalt / carbon composite wave-absorbing material and a preparation method thereof. Background technique [0002] With the rapid development of the electronic information industry, electronic products have been widely used in military and civilian fields, but the accompanying electromagnetic pollution has also brought many impacts on people's lives. Absorbing material is a new type of material that can convert electromagnetic energy into heat energy or dissipate electromagnetic energy through interference and phase consumption. According to the electromagnetic wave loss mechanism, absorbing materials can be divided into dielectric loss absorbing materials and magnetic loss absorbing materials. At present, composite absorbers are favored by researchers because of their ability to have both dielectric loss and magnetic loss. Cobalt / carbon material is a kind of compos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00
CPCC09K3/00
Inventor 强荣杨红英马季玫姚荣森高明洋黎召辉张雄雄杨亚玲代晨汝牛莹歌岑梦佳范志斌辛泽波李诗雨黄楚煜
Owner ZHONGYUAN ENGINEERING COLLEGE
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