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Light-weight broadband electromagnetic wave absorbing material and preparation method thereof

A technology for absorbing materials and electromagnetic waves, which is applied in the field of light-weight broadband electromagnetic wave absorbing materials and their preparation, can solve problems such as single use, difficult electromagnetic wave broadband and high-efficiency absorption, and achieve simple production process, good absorption effect, and strong absorption effect

Active Publication Date: 2020-01-24
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the single use of electromagnetic wave absorbers and wave-absorbing mechanisms, it is difficult for existing electromagnetic wave-absorbing materials to achieve broadband and efficient absorption of electromagnetic waves
In addition, in practical applications, the large density limits the application of electromagnetic wave absorbing materials in equipment such as stealth aircraft

Method used

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  • Light-weight broadband electromagnetic wave absorbing material and preparation method thereof
  • Light-weight broadband electromagnetic wave absorbing material and preparation method thereof
  • Light-weight broadband electromagnetic wave absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of precursor

[0033] First, at room temperature, 5 g of copper nitrate trihydrate was dissolved in 60 mL of deionized water for ultrasonication, and 1.36 g of trimesic acid was dissolved in 60 mL of ethanol for ultrasonication to obtain copper nitrate trihydrate aqueous solution and trimesic acid ethanol solution respectively. Then, under the condition of electromagnetic stirring, the copper nitrate trihydrate aqueous solution was dripped into the trimesic acid ethanol solution dropwise, and then 4mL DMF was dropped dropwise to obtain a mixed solution, and after stirring for 10min, the mixed solution was poured into a stainless steel high-pressure reaction kettle , carry out solvothermal synthesis, and react at 80°C for 20h; finally, the product obtained from the reaction is washed with methanol for 3 times, centrifuged and placed in a vacuum drying oven and dried at 120°C for 12h to obtain copper trimesate (HKUST-1( Cu)).

[0034] (2) Catalytic carbon...

Embodiment 2

[0040] (1) Preparation of precursor

[0041] First, at room temperature, 5 g of copper nitrate trihydrate was dissolved in 60 mL of deionized water for ultrasonication, and 1.36 g of trimesic acid was dissolved in 60 mL of ethanol for ultrasonication to obtain copper nitrate trihydrate aqueous solution and trimesic acid ethanol solution respectively. Then, under the condition of electromagnetic stirring, the copper nitrate trihydrate aqueous solution was dropped dropwise into the trimesic acid ethanol solution, and then 4mL DMF was dropped dropwise to obtain a mixed solution, and after stirring for 10min, the mixed solution was poured into a stainless steel high-pressure reaction kettle , carried out hydrothermal synthesis, and reacted at 80°C for 20h; finally, the reaction product was washed with methanol for 3 times, centrifuged and placed in a vacuum drying oven to dry at 120°C for 12h to obtain trimesic acid copper (HKUST-1 (Cu)).

[0042] (2) Catalytic carbonization

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Abstract

The invention discloses a multilayer light-weight broadband electromagnetic wave absorbing material based on a metal-organic framework compound. The material is prepared by the following steps: by using hydrothermally synthesized copper 1,3,5-benzenetricarboxylic acid as a substrate, adding ammonium molybdate as a catalyst, performing high-temperature carbonization, and performing washing to finally obtain the multilayer porous carbon structure with rich mesopores and macropores. The method provided by the invention has a simple production process, the synthesized multilayer porous carbon material has the advantages of a low density, a large coverage bandwidth, high reflection loss and the like, and the method has good reference significance for preparing light-weight broadband electromagnetic wave absorption materials.

Description

technical field [0001] The invention relates to the technical field of electromagnetic wave absorption, in particular to a lightweight broadband electromagnetic wave absorption material and a preparation method thereof. Background technique [0002] With the advancement of electronic information technology, all kinds of electronic equipment are used in all aspects of people's life. On the one hand, it facilitates people's life. On the other hand, the electromagnetic pollution generated by electronic equipment also affects people's health. In addition, the advancement of military radar communication has also greatly promoted the development of stealth aircraft. Therefore, electromagnetic wave absorbing materials have broad application prospects, both in life and in military affairs. Due to the single use of electromagnetic wave absorbers and absorbing mechanisms, it is difficult for existing electromagnetic wave absorbing materials to achieve broadband and efficient absorpti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C04B26/26C08G83/00
CPCC04B26/26C04B2111/00258C08G83/008C01B32/05C04B14/386C04B22/12
Inventor 娄雅馨谭果果满其奎宁明强陈淑文康宜宇
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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