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Corrosion-resistant light broadband wave-absorbing coating and preparation method thereof

A wave-absorbing coating and corrosion-resistant technology, applied in radiation-absorbing coatings, anti-corrosion coatings, epoxy resin coatings, etc. Wide, strong and other issues, to achieve the effect of strong absorption

Inactive Publication Date: 2021-07-13
AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ferromagnetic absorber has a large specificity, and the surface density of the wave-absorbing coating prepared by it is high, which cannot meet the requirements of "light, thin, wide, and strong" wave-absorbing materials.
In addition, the shortcomings of ferromagnetic absorbents such as anti-oxidation, acid and alkali resistance, and poor weather resistance also limit its application range.

Method used

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  • Corrosion-resistant light broadband wave-absorbing coating and preparation method thereof
  • Corrosion-resistant light broadband wave-absorbing coating and preparation method thereof
  • Corrosion-resistant light broadband wave-absorbing coating and preparation method thereof

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preparation example Construction

[0050] Based on the same inventive concept, the embodiment of the present application also provides a preparation method of the above-mentioned corrosion-resistant lightweight broadband wave-absorbing coating, including the following steps:

[0051] After mixing the resin and diluent evenly, add carbon-based absorbent and corrosion-resistant iron-based absorbent and stir evenly, then add additives and fillers, continue stirring, and then add curing agent to obtain corrosion-resistant light broadband wave-absorbing coating.

[0052] In some embodiments, the carbon-based absorbent and the corrosion-resistant iron-based absorbent are also pretreated, respectively, prior to adding the carbon-based absorbent and the corrosion-resistant iron-based absorbent;

[0053] The pretreatment of the carbon-based absorbent is as follows: put the carbon-based absorbent in a ball mill for ball milling, then add the ball-milled carbon-based absorbent to ethanol, ultrasonically disperse, filter an...

Embodiment 1

[0061] The embodiment of the present application provides a corrosion-resistant lightweight broadband wave-absorbing coating, including the following raw materials in weight percentage:

[0062] 12% electromagnetic wave absorber, 26% resin, 53.5% thinner, 5.5% curing agent, 3.0% additive;

[0063] Among them, the electromagnetic wave absorber includes two mixtures of carbon-based absorber and corrosion-resistant iron-based absorber. The carbon-based absorber is graphene, and the corrosion-resistant iron-based absorber is FeSiCr (model is FSC-4). The mass ratio is 10:2; the resin is a mixture of 102C-4H and E-44, and the quality of 102C-4H resin accounts for 80% of the total resin mass; the diluent is a mixture of xylene and cyclohexanone, xylene and cyclohexanone The mass ratio of ketone is 8:2; the curing agent is a mixture of NX-2040 and D400, and the mass ratio of NX-2040 and D400 is 7:3; additives include dispersant, leveling agent, anti-settling agent and defoamer Among ...

Embodiment 2

[0069] The embodiment of the present application provides a corrosion-resistant lightweight broadband wave-absorbing coating, including the following raw materials in weight percentage:

[0070] 16% electromagnetic wave absorber, 24% resin, 52% thinner, 4.5% curing agent, 3.5% additive;

[0071] Among them, the electromagnetic wave absorber includes two mixtures of carbon-based absorber and corrosion-resistant iron-based absorber. The carbon-based absorber is graphene, and the corrosion-resistant iron-based absorber is FeSiCr (model is FSC-4). The mass ratio is 13:3; the resin is a mixture of 102C-4T and E-44, and the quality of 102C-4T resin accounts for 80% of the total resin mass; the diluent is a mixture of xylene and cyclohexanone, xylene and cyclohexanone The mass ratio of ketone is 8:2; the curing agent is NX-2040; the auxiliary agent includes a mixture of dispersant, leveling agent, anti-sedimentation agent and defoamer, among which DS-172 is used as dispersant, and JF...

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Abstract

The invention provides a corrosion-resistant light broadband wave-absorbing coating and a preparation method thereof. The wave-absorbing coating comprises an electromagnetic wave absorbent, resin, a diluent, a curing agent, a filler and an auxiliary agent, wherein the electromagnetic wave absorbent comprises a carbon-based absorbent and a corrosion-resistant iron-based absorbent. According to the wave-absorbing coating, a compound system of the carbon-based absorbent and the corrosion-resistant iron-based absorbent is adopted, the advantages of the carbon-based absorbent and the corrosion-resistant iron-based absorbent are integrated, the wave-absorbing coating with the electrical loss characteristic and the magnetic loss characteristic is prepared, and strong absorption in a wide frequency range is achieved. Experiments show that the absorption peak intensity of a coating with the thickness of 1 mm prepared from the wave-absorbing coating exceeds -20 dB, and the absorption bandwidth smaller than or equal to -4 dB exceeds 7.4 GHz; and experiments show that the wave-absorbing coating prepared from the wave-absorbing coating can tolerate more than 2400 hours in neutral salt mist and can tolerate more than 300 hours in acid salt mist (pH 3.5).

Description

technical field [0001] The invention relates to the technical field of electromagnetic wave-absorbing materials, in particular to a corrosion-resistant lightweight broadband wave-absorbing coating and a preparation method thereof. Background technique [0002] The rapid development of electronic information technology, while bringing convenience to people's production and life, has also produced harm that cannot be ignored. Electromagnetic radiation pollution not only interferes with the normal work of electronic equipment, but also causes irreversible damage to human health. At the same time, with the development of detection technology, the survival and penetration capabilities of weapons and equipment have been greatly challenged. Therefore, how to effectively reduce electromagnetic radiation pollution has become one of the focuses of countries all over the world, and microwave-absorbing materials have also been developed accordingly. [0003] According to the electroma...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/32C09D5/08C09D7/65
CPCC08L2205/025C08L2205/20C09D5/08C09D5/32C09D163/00C09D7/65C09D7/70C08L63/00C08L61/06C08K9/00C08K3/042C08K3/041C08K3/34
Inventor 罗振涛王浩继丁铁伢
Owner AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON
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