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A kind of carbon nanocomposite wave-absorbing slurry and preparation method thereof

A carbon nanocomposite and carbon nanotechnology, applied in the direction of radiation-absorbing coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems such as limitations in direct application fields, solve dispersion and functional application problems, and improve electromagnetic Protective performance, the effect of expanding the scope of use

Active Publication Date: 2021-02-26
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

[0005] In order to overcome the deficiencies in the prior art, the present invention provides a carbon nanocomposite wave-absorbing slurry and its preparation method, which solves the limitation of the direct application field of the carbon nanocomposite wave-absorbing agent prepared by the liquid method, and adopts a composite surface The active agent disperses the electrical loss and magnetic loss functional components, which are added through synchronous synthesis to make them well dispersed in the aqueous polyurethane polymer solution

Method used

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  • A kind of carbon nanocomposite wave-absorbing slurry and preparation method thereof
  • A kind of carbon nanocomposite wave-absorbing slurry and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A preparation method of carbon nano wave-absorbing slurry, comprising the following steps:

[0030] S1. Put the polyols and additives in acetone in sequence, and use mechanical stirring or magnetic stirring at a temperature of 30-40° C. at a rotation speed of 100-500 r / min, and stir until fully fused to obtain the first mixture;

[0031] S2. At a temperature of 40-50°C, add the nano-carbon material into the first mixture of S1, disperse and mix for 30-90min, and rotate at a speed of 500-1000r / min to prepare the second mixture;

[0032] S3. At a temperature of 50-60°C, add isocyanate into the second mixture of S2, and keep it warm for 30-60min; at a temperature of 60-65°C, keep it warm for 60-100min; the third mixture;

[0033] S4. At a temperature of 60-65° C., adding ferrite materials into the third mixture of S3 to prepare a fourth mixture;

[0034] S5. At a temperature of 50-60° C., add distilled water and adjust the pH to 6-7 with hydrochloric acid or sodium hydro...

Embodiment 2

[0043] S1. Put 5-10ml of acetone in a four-necked flask with a volume of 500ml, connected with mechanical stirring, condensing reflux, thermometer, nitrogen protection and a liquid filling port, and successively add 100g-110g of polyester diol, 0.015-0.08g of fat The emulsifier compounded with alcohol polyoxyethylene ether and 0.005-0.02g sodium dodecylbenzenesulfonate, the flame retardant compounded with 5-10g aluminum hydroxide and 3-8g trimethyl phosphate are dissolved in a four-necked flask in a fume hood, mechanically stirred at a speed of 100-500r / min, and a temperature of 30-40°C, so that the components are fully fused to obtain the first mixture;

[0044] S2. At a temperature of 40-50°C, add nano-carbon materials into the first mixture of S1. The nano-carbon materials are self-made aligned multi-walled carbon nanotubes with a diameter of 10-50 nm and a length of 10-200 μm, weighing 0.5 -2g, after pre-ultrasonic treatment, add it into the four-necked flask containing th...

Embodiment 3

[0049] S1. Put 5-10ml of acetone in a four-necked flask with a volume of 500ml, connected with mechanical stirring, condensing reflux, thermometer, nitrogen protection and a liquid filling port, and successively add 100g-110g of polyester di, 0.015-0.08g of fatty alcohol Emulsifier compounded with polyoxyethylene ether and 0.005-0.02g sodium dodecylbenzenesulfonate, flame retardant compounded with 3-5g aluminum hydroxide, 3-5g chlorinated paraffin and 1-3g trimethyl phosphate Dissolved in a four-neck flask, mechanically stirred in a fume hood at a speed of 100-500r / min, fed with nitrogen protection, condensed and refluxed at a temperature of 30-40°C to fully dissolve the components to obtain the first mixture;

[0050] S2. At a temperature of 40-50°C, add carbon nanomaterials to the first mixture of S1. The carbon nanomaterials are multi-walled carbon nanotubes with a diameter of 10-50 nm and a length of 10-50 μm, weighing 0.5- 1.5g, ultrasonically disperse in 50-100ml of eth...

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Abstract

The invention relates to the technical field of nano-carbon material functional preparation and application, in particular to carbon nanometer composite wave-absorbing slurry and a preparation methodthereof. A special array carbon nanotube is matched with a ferrite sol material, so that the composite slurry has the characteristics of electrical loss and magnetic loss, and the electromagnetic protection performance can be improved remarkably. A waterborne polyurethane system is adopted, so that the application performance can be improved, and the problem concerned with environment protection can be solved effectively. The carbon nanometer composite wave-absorbing slurry can be used as coating material, and can be blended with polyurethane and other high-molecular materials, so that the application range is remarkably extended. The nanometer carbon material is subjected to ultrasonic treatment, so that the problem that the wound carbon nanomaterials with disorderly orientation are difficult to disperse is solved effectively, the composite effect of 1 plus 1 larger than 2 is achieved, the conventional process method of preparing the composite material by mixing micro-nano powder anda resin substrate is overturned, the problems concerned with dispersive and functional application of the micro-nano powder are solved fundamentally, and a basis of special material is laid for the modern manufacturing.

Description

technical field [0001] The invention relates to the technical field of functionalized preparation and application of nano-carbon materials, and more specifically relates to a carbon nano-composite wave-absorbing slurry and a preparation method thereof. Background technique [0002] Due to the development and expansion of cities, some large and medium-sized radio and television transmitting stations and mobile communication transmitting base stations are surrounded by residential areas; the rapid development of urban transportation systems (automobiles, trams, subways, light rails and electrified railways) has caused an upward trend in urban electromagnetic noise ; High-voltage transmission lines pass through the densely populated residential areas, and local residents' living areas form strong field areas and are polluted; the popularity of mobile phones and the increase of household appliances, the electromagnetic energy density of the small family environment is constantly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/06C09D175/04C09D175/08C09D5/32C09D7/61C09D7/63C08G18/76C08G18/42
CPCC08G18/42C08G18/7614C08K2003/2227C08K2201/011C09D5/32C09D175/04C09D175/06C09D175/08C09D7/61C09D7/63C08K13/06C08K9/00C08K3/041C08K3/22C08K5/521
Inventor 李克训马江将张捷王东红贾琨郭峰刘伟
Owner NO 33 RES INST OF CHINA ELECTRONICS TECHNOOGY GRP
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