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Tungsten disulfide-reduced graphene oxide three-dimensional self-assembly structure absorbing material

A technology of tungsten disulfide and wave-absorbing material, which is applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of increased material quality, high material preparation cost, poor wave-absorbing performance, etc., and achieves low cost and low consumption. Effect

Inactive Publication Date: 2019-01-11
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Two-dimensional graphene sheets generally have certain absorbing properties after the surface is loaded with metal oxides or conductive polymers, but the obtained absorbing materials only have better matching thickness (3-5mm). Absorbing performance, and the addition amount is large (mass ratio 30-50%), which will cause a large increase in material quality and a decrease in mechanical properties
[0004] In recent years, three-dimensional sponge-like reduced graphene oxide, which forms a microscopic porous structure through hydrothermal reaction, has become a research hotspot in the field of materials. The frequency range of absorbing more than 10dB has been obtained, so many studies have focused on ferrite loaded on the three-dimensional sponge structure reduced graphene oxide to improve the absorbing performance, but the quality of the material has been greatly improved
At the same time, due to the high cost of graphene preparation, the price of graphene has remained high. The use of graphene as the main material will lead to high cost of material preparation and it is difficult to promote

Method used

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  • Tungsten disulfide-reduced graphene oxide three-dimensional self-assembly structure absorbing material
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  • Tungsten disulfide-reduced graphene oxide three-dimensional self-assembly structure absorbing material

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Embodiment 1

[0022] The invention provides the following technical scheme: a tungsten disulfide-reduced graphene oxide three-dimensional self-assembled structure absorbing material, the absorbing material is composed of tungsten disulfide and reduced graphene oxide, and the material is in the shape of a black sponge as a whole. The graphene sheets are interspersed in the tungsten disulfide sheets to form a layer-by-layer interpenetrating stack structure.

[0023] The preparation method of the present embodiment comprises the following steps:

[0024] A, graphene oxide is dispersed in the water, N, N-dimethylformamide mixed solution that volume ratio is 1:1, and concentration is 1.0mg / mL;

[0025] B. Add 0.6g tungsten hexachloride to the solution of step A and stir evenly;

[0026] C, 1.2g thioacetamide is added in the solution of step B and stirred evenly;

[0027] D. Put the homogeneously mixed solution in step C into a reaction kettle, and heat at 120° C. for reaction;

[0028] E. Aft...

Embodiment 2

[0033] A tungsten disulfide-reduced graphene oxide three-dimensional self-assembled structure absorbing material, the absorbing material is composed of tungsten disulfide and reduced graphene oxide, the material is in the shape of a black sponge as a whole, and the graphene sheets are interspersed in the In the tungsten disulfide sheet, a layer-by-layer interspersed stack structure is formed.

[0034] The preparation method of the present embodiment comprises the following steps:

[0035] A, graphene oxide is dispersed in the water, N, N-dimethylformamide mixed solution that volume ratio is 1:1, and concentration is 1.0mg / mL;

[0036] B. Add 0.6g tungsten hexachloride to the solution of step A and stir evenly;

[0037] C, 1.2g thioacetamide is added in the solution of step B and stirred evenly;

[0038] D. Put the homogeneously mixed solution in step C into a reaction kettle, and heat at 120° C. for reaction;

[0039] E. After the reaction in step D, at this time, tungsten ...

Embodiment 3

[0043] A tungsten disulfide-reduced graphene oxide three-dimensional self-assembled structure absorbing material, the absorbing material is composed of tungsten disulfide and reduced graphene oxide, the material is in the shape of a black sponge as a whole, and the graphene sheets are interspersed in the In the tungsten disulfide sheet, a layer-by-layer interspersed stack structure is formed.

[0044] The preparation method of the present embodiment comprises the following steps:

[0045] A, graphene oxide is dispersed in the water, N, N-dimethylformamide mixed solution that volume ratio is 1:1, and concentration is 1.0mg / mL;

[0046] B. Add 0.6g tungsten hexachloride to the solution of step A and stir evenly;

[0047] C, 1.2g thioacetamide is added in the solution of step B and stirred evenly;

[0048] D. Put the homogeneously mixed solution in step C into a reaction kettle, and heat at 120° C. for reaction;

[0049] E. After the reaction in step D, at this time, tungsten ...

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Abstract

The invention discloses a tungsten disulfide-reduced graphene oxide three-dimensional self-assembly structure absorbing material. The absorbing material is composed of tungsten disulfide and reduced graphene oxide, and is in the overall shape of black sponge, and the reduced graphene oxide sheets are penetrated in the tungsten disulfide sheets so as to form a layer-by-layer penetrated stacked structure. After the absorbing material disclosed by the invention is uniformly mixed with paraffin, under the condition that the absorbing material accounts for 10% of the total mass, when the matching thickness is 3.0mm, the frequency bandwidth having the reflection loss of lower than -10dB can reach 8.74GHz in a frequency range of 2-18GHz, and when the maximum value appears at 14.16GHz, the reflection loss is -42.86dB.

Description

technical field [0001] The invention relates to the technical field of preparation of electromagnetic wave absorbing materials, in particular to a tungsten disulfide-reduced graphene oxide three-dimensional self-assembled structure absorbing material. Background technique [0002] At present, the wave-absorbing materials are gradually developing in the aspects of thin (layer), light (mass), wide (frequency), and strong (absorbing performance). Carbon materials are gradually replacing traditional ferrite materials in wave-absorbing materials. Graphene is a two-dimensional nanomaterial with a large specific surface area, excellent electrical and thermal conductivity, and high mechanical properties, and is widely used in the field of composite materials. [0003] Two-dimensional graphene sheets generally have certain absorbing properties after the surface is loaded with metal oxides or conductive polymers, but the obtained absorbing materials only have better matching thickness...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00
CPCC09K3/00
Inventor 吴凡夏一鹭谢阿明孙梦潇
Owner NANJING UNIV OF SCI & TECH