Carbonyl iron/graphene/polyvinylpyrrolidone compound wave-absorbing material, preparation method thereof and prepared wave-absorbing plate prepared by method

A technology of polyvinylpyrrolidone and composite wave-absorbing materials, which is applied in the field of wave-absorbing sheets, can solve problems such as narrow effective frequency bands, achieve the effects of expanding effective wave-absorbing bandwidth, action frequency bandwidth, and solving electromagnetic leakage

Inactive Publication Date: 2017-08-04
江苏求润纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the shortcomings of the composite wave-absorbing material in the prior art, such as the narrow effective frequency band, the present invention provides a carbonyl iron / graphene / polyvinylpyrrolidone composite wave-absorbing material, its preparation method and the prepared wave-absorbing sheet

Method used

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  • Carbonyl iron/graphene/polyvinylpyrrolidone compound wave-absorbing material, preparation method thereof and prepared wave-absorbing plate prepared by method
  • Carbonyl iron/graphene/polyvinylpyrrolidone compound wave-absorbing material, preparation method thereof and prepared wave-absorbing plate prepared by method
  • Carbonyl iron/graphene/polyvinylpyrrolidone compound wave-absorbing material, preparation method thereof and prepared wave-absorbing plate prepared by method

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A preparation of composite absorbing material

[0038] Mix carbonyl iron powder, zirconia beads, and absolute ethanol into the planetary ball mill with a mass ratio of 1:80:10, maintain the speed of the ball mill at 1000 rpm, and mill for 4 hours; Drying in a vacuum drying oven at 60° C. to constant weight to obtain carbonyl iron powder with a particle size of 0.5-1.5 μm after ball milling.

[0039]Use 200 mesh natural graphite powder, 98% concentrated sulfuric acid, sodium nitrate, potassium permanganate, and 3% hydrogen peroxide. Graphite powder, concentrated sulfuric acid, and sodium nitrate were mixed at a mass ratio of 1:0.6:45 with a magnetic stirring speed of 250rpm for 8 minutes, cooled in an ice-water bath to below 5°C, and then potassium permanganate powder 5 times the mass of graphite powder was slowly added to the above mixture, and stirred React for 35 minutes, and control the temperature of the reaction process below 20°C; then raise the temperature to 30...

Embodiment 2

[0049] A preparation of composite absorbing material

[0050] Mix carbonyl iron powder, zirconia beads, and absolute ethanol into the planetary ball mill with a mass ratio of 1:90:12, maintain the speed of the ball mill at 1100rpm, and mill for 3 hours; Drying in a vacuum drying oven at 60° C. to constant weight to obtain carbonyl iron powder with a particle size of 0.5-1.5 μm after ball milling.

[0051] Use 300 mesh natural graphite powder, 98% concentrated sulfuric acid, sodium nitrate, potassium permanganate, and 3% hydrogen peroxide. Graphite powder, concentrated sulfuric acid, and sodium nitrate were mixed at a mass ratio of 1:0.5:42.3 with a magnetic stirring speed of 200rpm for 10 minutes, cooled in an ice-water bath to below 5°C, and then potassium permanganate powder 4 times the mass of graphite powder was slowly added to the above mixture, and stirred React for 30 minutes, and control the temperature of the reaction process below 20°C; then raise the temperature to...

Embodiment 3

[0057] A preparation of composite absorbing material

[0058] Mix carbonyl iron powder, zirconia beads, and absolute ethanol into the planetary ball mill with a mass ratio of 1:70:8, maintain the speed of the ball mill at 900 rpm, and mill for 5 hours; Drying in a vacuum drying oven at 60° C. to constant weight to obtain carbonyl iron powder with a particle size of 0.8-2.3 μm after ball milling.

[0059] Use 400 mesh natural graphite powder, 98% concentrated sulfuric acid, sodium nitrate, potassium permanganate, and 3% hydrogen peroxide. Graphite powder, concentrated sulfuric acid, and sodium nitrate were mixed at a mass ratio of 1:0.4:38 with a magnetic stirring speed of 150rpm for 12 minutes, cooled in an ice-water bath to below 5°C, and then potassium permanganate powder three times the mass of graphite powder was slowly added to the above mixture, and stirred React for 25 minutes, and control the reaction temperature below 20°C; then raise the temperature to 40°C, continu...

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Abstract

The invention discloses a carbonyl iron/graphene/polyvinylpyrrolidone compound wave-absorbing material, a preparation method thereof and the prepared wave-absorbing plate prepared by the method. The carbonyl iron/graphene/polyvinylpyrrolidone compound wave-absorbing material comprises a carbonyl iron powder core layer, a reduction-oxidation graphene layer which is coated on the periphery of the carbonyl iron powder core layer and a polyvinylpyrrolidone layer which is coated on the periphery of the reduction-oxidation graphene layer. The carbonyl iron/graphene/polyvinylpyrrolidone compound wave-absorbing material disclosed by the invention is characterized by simple preparation process, strong electromagnetic wave absorption capacity, wide frequency bandwidth, low cost and important application value in the fields of microwave absorption, electromagnetic leakage solution, electromagnetic shielding, and the like.

Description

technical field [0001] The invention relates to a carbonyl iron / graphene / polyvinylpyrrolidone composite wave-absorbing material, a preparation method thereof and a prepared wave-absorbing sheet, belonging to the field of wave-absorbing materials. Background technique [0002] With the wide-scale application of wireless communication devices, integrated electronic equipment and military radar, the demand for reducing the impact of electromagnetic pollution, eliminating electromagnetic interference, and enhancing the stealth capability of military equipment radar is becoming increasingly urgent. Microwave absorbing material is a functional material with special electromagnetic properties, which can convert incident electromagnetic waves into other types of energy, showing great advantages in the process of solving the above problems. [0003] According to the interaction mechanism between electromagnetic waves and matter, the design principle of absorbing materials is to reaso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/10C08K3/18C08L91/06C09D7/12C09D5/32
CPCC08K3/18C08K9/10C09D5/32C09D7/62C08L91/06
Inventor 翁枭迪张扬孙晓雯
Owner 江苏求润纳米科技有限公司
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