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Graphene composite wave absorbing material, method for preparing same and coating agent prepared from graphene composite wave absorbing material

A graphene composite and wave-absorbing material technology, applied in the field of wave-absorbing materials, can solve the problems of poor thermal stability of polymers, high density, affecting applications, etc., and achieve the effect of strong absorption and wide application prospects.

Inactive Publication Date: 2017-10-17
YANGZHOUSRKLE INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding inorganic particles can greatly improve the wave-absorbing ability of the material, but its density is high, and the composite wave-absorbing material prepared cannot meet the requirements of light weight; while adding conductive polymers, although relatively light, the polymer heat The stability is relatively poor, which will affect its application in special environments such as high temperature and low temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The main steps are:

[0020] Zeolite Na A was prepared according to the method of the synthesis committee of the International Zeolite Association.

[0021] Preparation of graphene oxide (m-r GO):

[0022] The preparation of GO refers to the improved Hummers method, that is, adding sodium nitrate to concentrated sulfuric acid under the condition of ice bath and stirring. After the sodium nitrate is completely dissolved in concentrated sulfuric acid, add graphite powder to it while stirring, and then slowly add Potassium permanganate, the addition rate is strictly controlled to keep the temperature below 10 °C. Then remove the ice bath and use a water bath to keep the temperature at about 35 °C for 2 h. Then deionized water was slowly added, further diluted with warm (60°C) deionized water, and hydrogen peroxide was added to reduce the remaining potassium permanganate in the system to obtain a bright yellow suspension. Filter while hot, then wash once with hydrochlori...

Embodiment 2

[0036] A graphene composite wave-absorbing material is made of zeolite and graphene.

[0037] The zeolite is Na-A type zeolite.

[0038] The graphene is graphene oxide (m-r GO).

[0039] A preparation method of graphene composite wave-absorbing material, made according to the following steps: dissolving graphene oxide (m-rGO) in ethanol aqueous solution, after ultrasonic treatment for 12 min, mixing graphene solution with Na A, stirring at room temperature After 25 hours, take it out, filter it, and dry it in an oven at 45 °C to obtain a graphene / zeolite composite material, which is finally composited with Fe3O4 and Na A.

[0040] The preparation method of the graphene oxide (m-r GO) is: adding concentrated sulfuric acid in an ice-water bath, adding graphite powder and a solid mixture of sodium nitrate under stirring, slowly adding potassium permanganate to control the reaction temperature <10°, stirring for 2 hours, and continuing to stir for 5 days , add 5% sulfuric acid t...

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Abstract

The invention relates to a graphene composite wave absorbing material, a method for preparing the same and a coating agent prepared from the graphene composite wave absorbing material. The graphene composite wave absorbing material is made of zeolite and graphene. The graphene composite wave absorbing material, the method and the coating agent have the advantages that excellent wave absorbing performance of the graphene composite wave absorbing material made of microwave-treated reduced graphene oxide (m-rGO) and the zeolite (Na A) by means of composition is discovered, and the graphene composite wave absorbing material is an electric loss type wave absorbing material; the graphene composite wave absorbing material which is a novel full-inorganic wave absorbing material has characteristics of light weight, broad frequency bands and strong absorption, and accordingly the graphene composite wave absorbing material, the method and the coating agent have broad application prospects in future military and civil fields.

Description

technical field [0001] The invention relates to a graphene composite wave-absorbing material, a preparation method thereof and a coating agent prepared by using the material, belonging to the technical field of wave-absorbing materials. Background technique [0002] The rapid development of electronic technology has brought convenience to human life, but at the same time, the impact of electromagnetic radiation on the environment is also increasing. Therefore, absorbing materials have become one of the key points in research and development in the field of electromagnetic materials. The research on new absorbing materials with "thin thickness, wide frequency band, light weight and strong absorption" has become the development direction of technology in this field. In this paper, using the unique electromagnetic properties of graphene and the special framework structure of zeolite, a composite absorbing material based on zeolite and graphene was designed and prepared, and it...

Claims

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Application Information

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IPC IPC(8): C09K3/00
CPCC09K3/00
Inventor 孔庆丰薛淑云董卫强
Owner YANGZHOUSRKLE INDAL
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