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A kind of light-weight hollow carbon cube wave absorbing material and preparation method thereof

A technology of wave-absorbing materials and cubes, which is applied in the field of light-weight hollow carbon cube wave-absorbing materials and its preparation, can solve the problems of non-adjustable electromagnetic wave absorption frequency band and mismatching impedance of pure carbon wave-absorbing materials, so as to improve the absorption effect and improve The effect of absorbing frequency band and reducing density

Active Publication Date: 2021-05-07
ZHONGYUAN ENGINEERING COLLEGE
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Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the present invention proposes a light-weight hollow carbon cube wave-absorbing material and its preparation method, making full use of Cu 2 O template to build a hollow structure, to solve the problems of pure carbon absorbing material impedance mismatch, electromagnetic wave absorption frequency band can not be adjusted, etc.

Method used

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  • A kind of light-weight hollow carbon cube wave absorbing material and preparation method thereof
  • A kind of light-weight hollow carbon cube wave absorbing material and preparation method thereof
  • A kind of light-weight hollow carbon cube wave absorbing material and preparation method thereof

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Embodiment 1

[0029] The preparation method of a light-weight hollow carbon cube wave-absorbing material of this embodiment is carried out according to the following steps:

[0030] 1. Preparation of Cu 2 O cube: Cu 2 O cube is obtained by liquid phase chemical reduction method, the specific steps are: 0.02 gCu(Ac) 2 ·H 2 O was stirred and dissolved in 10 mL of deionized water, and then 0.5 g of polyethylene glycol (PEG, MW: 2000) was added and stirred for 10 min. After PEG was completely dissolved, 50 μL of NaOH solution (6.0 mol / L) was added dropwise to the mixed solution, and the mixed solution turned blue, indicating that Cu(OH) 2 Precursors are formed. After the reaction was stirred for 10 min, 0.2 mL of ascorbic acid solution (1 mol / L) was added dropwise to the reaction system. The reaction lasted for 1 h, and the solution gradually turned orange. The obtained precipitate was fully washed with deionized water and ethanol to remove PEG molecules adsorbed on the surface of the mate...

Embodiment 2

[0040] The preparation method of a light-weight hollow carbon cube wave-absorbing material of this embodiment is carried out according to the following steps:

[0041] 1. Preparation of Cu 2 O cube: Cu 2 O cubes were obtained by liquid-phase chemical reduction method, the specific steps were: 0.1 gCuSO 4 Stir to dissolve in 10 mL of deionized water, then add 5 g of polyvinylpyrrolidone and stir for 10 min. After the polyvinylpyrrolidone was completely dissolved, 50 μL of NaOH solution (6.0 mol / L) was added dropwise to the mixed solution, and the mixed solution turned blue, indicating that Cu(OH) 2 Precursors are formed. After the reaction was stirred for 10 min, 0.2 mL of ascorbic acid solution (1 mol / L) was added dropwise to the reaction system. The reaction lasted for 1 h, and the solution gradually turned orange. The obtained precipitate was fully washed with deionized water and ethanol to remove polyvinylpyrrolidone molecules adsorbed on the surface of the material, a...

Embodiment 3

[0045] The preparation method of a light-weight hollow carbon cube wave-absorbing material of this embodiment is carried out according to the following steps:

[0046] 1. Preparation of Cu 2 O cube: Cu 2 O cubes were obtained by liquid-phase chemical reduction method, the specific steps were: 0.05 gCu(NO 3 ) 2 Stir to dissolve in 10 mL of deionized water, then add 5 g of sodium dodecylbenzenesulfonate and stir for 10 min. After sodium dodecylbenzenesulfonate was completely dissolved, 50 μL of NaOH solution (8.0 mol / L) was added dropwise to the mixed solution, and the mixed solution turned blue, indicating that Cu(OH) 2 Precursors are formed. After the reaction was stirred for 10 min, 0.2 mL of ascorbic acid solution (1 mol / L) was added dropwise to the reaction system. The reaction continued for 4 h, and the solution gradually turned orange. The obtained precipitate was fully washed with deionized water and ethanol to remove the sodium dodecylbenzenesulfonate molecules ad...

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Abstract

The invention belongs to the field of material preparation, in particular to a light-weight hollow carbon cube wave-absorbing material and a preparation method thereof. The present invention aims to solve the problems of the impedance mismatch and the non-adjustable electromagnetic wave absorption frequency band of the pure carbon absorbing material prepared by the existing method. On the basis of making full use of the hard template to construct the hollow structure, a light-weight hollow carbon cube absorbing material is proposed. The method of preparation of the material. The present invention selects Cu 2 O microspheres are hard templates, and light hollow carbon cubes are obtained by in-situ growth, calcination, template removal and other processes. By adjusting Cu 2 The coating thickness of the polydopamine precursor on the O surface can be used to control the shell thickness of the hollow carbon cube, which can realize the effective regulation of the electrical conductivity of the carbon material in a small range, and can also obtain suitable wave-absorbing materials according to the needs, which is conducive to improving Impedance matching and absorbing effect of materials. The development of lightweight hollow carbon cube absorbing materials is expected to be applied in the field of building absorbing materials.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a light-weight hollow carbon cube wave-absorbing material and a preparation method thereof. Background technique [0002] With the development of the electronic information industry, electronic products have been widely used, which has brought a series of electromagnetic radiation problems, which have brought many impacts on people's production and life. An important way to reduce electromagnetic radiation is to absorb electromagnetic waves. Absorbing materials can promote the conversion of electromagnetic energy into heat energy or eliminate electromagnetic radiation fundamentally through interference and cancellation. Carbon materials have the advantages of low density, low price, simple preparation process, and adjustable structure, so they have great potential in the field of microwave absorption. At present, most reports focus on "electromagnetic double loss" composite m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05C01G3/02
CPCC01G3/02C01P2004/03C01B32/05
Inventor 强荣杨红英王艳芝魏静杨雪轲姚松别晓龙李鹏凯李博王冰瑶吕贤一尤茂宇乔知远张逸飞叶子
Owner ZHONGYUAN ENGINEERING COLLEGE
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