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Compositions for electromagnetic shielding composite coatings, coatings and methods thereof

A composite coating and electromagnetic shielding technology, applied in coatings, radiation-absorbing coatings, etc., can solve problems such as secondary electromagnetic pollution, and achieve the effects of low synthesis temperature, simple preparation method, and simple ingredients

Active Publication Date: 2016-05-18
江苏先进无机材料研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention aims at the technical problem that the shielding in the prior art is mainly realized by the strong reflection of the surface of the conductive medium to the incident electromagnetic wave, which easily leads to secondary electromagnetic pollution, and one of the purposes is to provide a new composite coating for electromagnetic shielding

Method used

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  • Compositions for electromagnetic shielding composite coatings, coatings and methods thereof
  • Compositions for electromagnetic shielding composite coatings, coatings and methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] According to the mass ratio of mesoporous carbon: resin = 14:86 (equivalent to mesoporous carbon filling amount of 14wt%), weigh mesoporous carbon CMK-3 and solid methyl methacrylate resin raw materials; dissolve the raw materials in ethyl acetate In the solvent, the total mass of raw materials: ethyl acetate mass = 1:5; after stirring at room temperature, put it into an ultrasonic disperser for ultrasonic dispersion for 6 hours; coat it on an engineering plastic substrate, and dry it in an oven at 40°C for 12 hours , Control the coating thickness after drying to 0.4mm.

[0021] Such as figure 1 Shown in 1: it is detected that the average electromagnetic shielding effectiveness of the electromagnetic shielding composite coating prepared in embodiment 1 in the X band is 7.29dB, the average absorption loss is 4.53dB, and the average reflection loss is 2.75dB. The reflection effect is low and the absorption loss is high. Such as figure 2 As shown in 1, the prepared ele...

Embodiment 2

[0023] According to the mass ratio of mesoporous carbon: resin = 20:80 (equivalent to 20wt% mesoporous carbon filling), weigh mesoporous carbon CMK-3 and solid methyl methacrylate resin raw materials; dissolve the raw materials in ethyl acetate In the solvent, the total mass of raw materials: ethyl acetate mass = 1:5; after stirring at room temperature, put it into an ultrasonic disperser for ultrasonic dispersion for 6 hours; coat it on an engineering plastic substrate, and dry it in an oven at 40°C for 12 hours , Control the coating thickness after drying to 0.4mm.

[0024] Such as figure 1 Shown in 2: detect that the average electromagnetic shielding effectiveness of the electromagnetic shielding composite coating prepared in embodiment 2 in the X-band is 10.69dB, the average absorption loss is 7.68dB, and the average reflection loss is 3.01dB. The reflection effect is low and the absorption loss is high. Such as figure 2 As shown in 2, the prepared electromagnetic shie...

Embodiment 3

[0026] According to the mass ratio of mesoporous carbon: resin = 30:70 (equivalent to 30wt% mesoporous carbon filling), weigh mesoporous carbon CMK-3 and solid methyl methacrylate resin raw materials; dissolve the raw materials in ethyl acetate In the solvent, the total mass of raw materials: ethyl acetate mass = 1:5; after stirring at room temperature, put it into an ultrasonic disperser for ultrasonic dispersion for 6 hours; coat it on an engineering plastic substrate, and dry it in an oven at 40°C for 12 hours , Control the coating thickness after drying to 0.4mm.

[0027] Such as figure 1 Shown in 3: it is detected that the average electromagnetic shielding effectiveness of the electromagnetic shielding composite coating prepared in embodiment 3 in the X-band is 15.78dB, the average absorption loss is 11.74dB, and the average reflection loss is 4.04dB. The reflection effect is low and the absorption loss is high. Such as figure 2 As shown in 3, the prepared electromagn...

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Abstract

The invention discloses an electromagnetic shielding composite coating use composition and a coating and a making method. The electromagnetic shielding composite coating comprises polymethyl methacrylate (PMMA) resin and mesoporous carbon CMK-3., and is obtained by uniformly coating a substrate with a composition containing the polymethyl methacrylate resin, the mesoporous carbon CMK-3 and a volatile organic solvent and then drying. The electromagnetic shielding composite coating has a better shielding effect on X band (8 ~ 12.0GHz) electromagnetic waves, the shielding effect is mainly from the absorption of electromagnetic waves, and the electromagnetic wave reflection is low, so that the electromagnetic shielding composite coating can provide efficient protection to a to-be-protective body, also can suppress environment secondary radiation pollution caused by the electromagnetic wave reflection. The electromagnetic shielding composite coating use composition can be conveniently brushed on the surface of plastic or fabric workpieces in various shapes to form the electromagnetic shielding composite coatings, and can meet shielding demands for the X band electromagnetic waves.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic shielding, and in particular relates to a composite coating composition for electromagnetic shielding, a coating and a method thereof. Background technique [0002] With the rapid development of science and technology and information industry, various electronic instruments and equipment have been widely used in the daily life of human beings and in the fields of industry and aerospace. The electromagnetic waves emitted by these electronic equipment are all over the human living environment , deteriorating the quality of human living environment. At present, electromagnetic radiation has become the fourth largest public hazard after air pollution, water pollution and noise pollution. On the one hand, electromagnetic radiation has led to increasingly prominent electromagnetic interference, which has a negative impact on the normal operation of many electronic devices and systems; on the ot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/12C09D7/12C09D5/32
Inventor 刘茜周虎庄建东费凡
Owner 江苏先进无机材料研究院
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