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Carbon nano organic temperature-resistant wave-absorbing coating, preparation method and coating method

A technology of wave-absorbing coatings and wave-absorbing coatings, which is applied to radiation-absorbing coatings, coatings, and devices for coating liquids on surfaces, and can solve problems such as insufficient wave-absorbing performance and insufficient temperature resistance

Inactive Publication Date: 2020-12-11
NO 33 RES INST OF CHINA ELECTRONICS TECHNOOGY GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of insufficient wave-absorbing performance and insufficient heat-resistant performance of existing organic heat-resistant wave-absorbing coatings, the present invention provides a carbon nano-organic heat-resistant wave-absorbing coating, a preparation method and a coating coating method, using high-temperature-resistant phenolic The high thermal stability of the resin endows the coating with good temperature resistance; the use of carbon nanomaterials with high thermal stability and high conductance loss improves the electromagnetic absorption performance of the coating; the use of inorganic materials with certain dielectric loss, certain conductivity and good temperature resistance Fillers further improve the coating's resistance to temperature and absorbing performance

Method used

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  • Carbon nano organic temperature-resistant wave-absorbing coating, preparation method and coating method
  • Carbon nano organic temperature-resistant wave-absorbing coating, preparation method and coating method
  • Carbon nano organic temperature-resistant wave-absorbing coating, preparation method and coating method

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preparation example Construction

[0035] A preparation method of a carbon nanometer organic heat-resistant wave-absorbing coating, comprising the following steps:

[0036] S1, carbon nanomaterials are placed in a beaker, add phenolic resin and solvent and mix well;

[0037] S2. Transfer the mixed system to a ball milling tank for the first ball milling; the time for one ball milling is 2 to 6 hours;

[0038] S3. After the primary ball milling is completed, the conductive ceramic filler is added to the above ball milling system for secondary ball milling to prepare a carbon nanometer temperature-resistant wave-absorbing coating. The time for secondary ball milling is 0.5-1 hour.

[0039] A method for coating a carbon nanometer organic heat-resistant wave-absorbing coating, comprising the following steps:

[0040] S1. Apply the carbon nanometer temperature-resistant wave-absorbing coating to the substrate after surface treatment by spraying process, and control the surface square resistance and wave-absorbing ...

Embodiment 1

[0050] 1) Weigh 4.7 parts of graphene, 37.3 parts of phenolic resin and 46.8 parts of ethanol and mix well;

[0051] 2) Transfer the mixed system to a ball mill tank, conduct a ball mill, and set the ball mill time to 3h;

[0052] 3) After the first ball milling is completed, weigh 11.2 parts of conductive potassium titanate, add it to the above ball milling system for a second ball milling for 0.5h, and prepare the carbon nano heat-resistant wave-absorbing coating;

[0053] 4) Take a 300mm × 300mm × 4.5mm glass fiber reinforced epoxy resin substrate, wash the substrate with ethanol and deionized water in sequence and dry it, and spray a carbon nano heat-resistant wave-absorbing coating with a thickness of 30 μm on the surface of the substrate;

[0054] 5) Place the coated glass fiber reinforced epoxy resin substrate in a drying oven, and set the heating program: 80°C for 30 minutes, 100°C for 20 minutes, 120°C for 30 minutes, 165°C for 150 minutes; curing heating rate 2°C / m...

Embodiment 2

[0057] 1) Weigh 4.7 parts of multi-walled carbon nanotubes, 37.3 parts of phenolic resin and 46.8 parts of ethanol and mix them evenly;

[0058] 2) Transfer the mixed system to a ball mill tank, conduct a ball mill, and set the ball mill time to 3h;

[0059] 3) After the first ball milling is completed, weigh 11.2 parts of conductive potassium titanate, add it to the above ball milling system for a second ball milling for 0.5h, and prepare the carbon nano heat-resistant wave-absorbing coating;

[0060] 4) Take a 300mm × 300mm × 4.5mm glass fiber reinforced epoxy resin substrate, wash the substrate with ethanol and deionized water in sequence and dry it, and spray a carbon nano heat-resistant wave-absorbing coating with a thickness of 30 μm on the surface of the substrate;

[0061] 5) Place the coated glass fiber reinforced epoxy resin substrate in a drying oven, and set the heating program: 80°C for 30 minutes, 100°C for 20 minutes, 120°C for 30 minutes, 165°C for 150 minutes;...

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Abstract

The invention relates to the technical field of wave-absorbing material preparation, in particular to a carbon nano organic temperature-resistant wave-absorbing coating, a preparation method and a coating method. A carbon nano wave-absorbing agent and a conductive ceramic filler are well dispersed in a phenolic resin matrix and an organic solvent through a ball milling process to obtain the carbonnano organic temperature-resistant wave-absorbing coating. The surface of a polymer substrate is coated with the carbon nano organic temperature-resistant wave-absorbing coating through a spraying process, a carbon nano organic temperature-resistant wave-absorbing coating layer taking a polymer material as a substrate is prepared through a programmed heating curing process, and the influence of coating preparation process parameters and coating layer coating and curing process parameters on the wave-absorbing performance and the temperature resistance of the coating is researched. By adjusting the sheet resistance of the coating, single-waveband absorption of the wave-absorbing coating to a C waveband (4GHz to 8 GHz) or a Ku waveband (12.5 GHz to 18 GHz) and simultaneous absorption to theC waveband and the Ku waveband can be realized, and the coating can resist high temperature of 500 DEG C for a short time and is stable for a long time at 300 DEG C.

Description

technical field [0001] The invention relates to the technical field of preparation of wave-absorbing materials, and more specifically, to a carbon nano-organic heat-resistant wave-absorbing coating, a preparation method and a coating coating method. Background technique [0002] With the rapid development of aerospace and electronic equipment, high-power and integrated electronic devices are more and more widely used in aircraft and electronic equipment. Due to the high heat generated by electronic devices or the location of the device close to a high heat release source, the temperature around the device reaches hundreds of degrees Celsius. As a result, there are difficulties in the electromagnetic protection of key heated parts. [0003] The particularity of structure, working state and operating environment of aerospace vehicles and highly integrated electronic equipment requires that the electromagnetic protection materials used in key heated parts need to have the perf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D161/06C09D5/32C09D7/61C08J7/04C08J9/36B05D5/00B05D5/12B05D7/02B05D7/24C08L63/00C08L79/08C08K7/14
CPCB05D5/00B05D5/12B05D7/02B05D7/24C08J9/365C08J2363/00C08J2379/08C08J2461/06C08K7/14C08K2003/2241C08K2003/3045C08K2201/001C09D5/32C09D161/06C09D7/61C08J7/0427C08K3/042C08K3/24C08K3/041C08K3/22C08K3/34C08K3/30
Inventor 张捷王蓬谷建宇王东红马晨王权
Owner NO 33 RES INST OF CHINA ELECTRONICS TECHNOOGY GRP
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