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Composite coated fiber with electromagnetic shielding function and preparation method thereof

A composite coating, electromagnetic shielding technology, applied in the direction of coating, carbon fiber, fiber processing, etc., can solve the problems of low electromagnetic parameters, can not meet the requirements of electromagnetic shielding materials, etc., to achieve good compactness, coating thickness and particle size can be accurate Control, the effect of excellent mechanical properties

Active Publication Date: 2019-05-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the defects existing in the existing coated carbon fiber materials, the purpose of the present invention is to provide a carbon fiber material with both excellent mechanical properties and good electromagnetic shielding performance, which solves the electromagnetic parameters existing in the use of existing carbon fibers as electromagnetic shielding materials. Low, unable to meet the requirements of electromagnetic shielding materials

Method used

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  • Composite coated fiber with electromagnetic shielding function and preparation method thereof
  • Composite coated fiber with electromagnetic shielding function and preparation method thereof
  • Composite coated fiber with electromagnetic shielding function and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A method for preparing a composite coated fiber with electromagnetic shielding function in this embodiment is implemented according to the following steps: 1. Put the carbon fiber in a tube furnace at a temperature of 700° C. for 10 minutes; 2. Put the carbon fiber treated in step 1 into Ultrasonic cleaning in acetone for 15min; 3. The carbon fibers processed in step 2 are prepared on the surface by radio frequency magnetron sputtering method to prepare FeCo alloy coating, that is, the lower magnetic layer; Controlled sputtering method to prepare aluminum oxide coating; 5. The carbon fiber after step 4 is processed on the surface by radio frequency magnetron sputtering method to prepare FeCo alloy coating, that is, the upper magnetic layer, that is, to complete the carbon fiber surface FeCo-Al 2 o 3 -Preparation of FeCo composite coating; wherein the composition ratio of the FeCo target in steps 3 and 5 is Fe:Co=50:50, the purity is 99.999%, and the vacuum degree before...

Embodiment 2

[0038] A method for preparing a composite coated fiber with electromagnetic shielding function in this embodiment is implemented according to the following steps: 1. Put the carbon fiber in a tube furnace at a temperature of 700° C. for 10 minutes; 2. Put the carbon fiber treated in step 1 into Ultrasonic cleaning in acetone for 15min; 3. The carbon fiber after step 2 is processed on the surface by radio frequency magnetron sputtering method to prepare FeNi alloy coating, i.e. the lower magnetic layer; 4. The fiber after step 3 is processed on the surface by DC magnetic Controlled sputtering method to prepare aluminum oxide coating; 5. The carbon fiber after step 4 is processed on the surface using radio frequency magnetron sputtering method to prepare FeNi alloy coating, that is, the upper magnetic layer, that is, to complete the carbon fiber surface FeNi-Al 2 o 3 -Preparation of FeNi composite coating; wherein the composition ratio of the FeNi target in steps 3 and 5 is Fe:N...

Embodiment 3

[0041] A method for preparing a composite coated fiber with electromagnetic shielding function in this embodiment is implemented according to the following steps: 1. Put the carbon fiber in a tube furnace at a temperature of 700° C. for 10 minutes; 2. Put the carbon fiber treated in step 1 into Ultrasonic cleaning in acetone for 15min; 3. The carbon fiber treated in step 2 is prepared on the surface by radio frequency magnetron sputtering method to prepare NiCo alloy coating, that is, the lower magnetic layer; Prepare alumina coating by controlled sputtering method; 5. Prepare NiCo alloy coating by radio frequency magnetron sputtering method on the surface of the carbon fiber after step 4 treatment, that is, the upper magnetic layer, that is, complete the carbon fiber surface NiCo-Al 2 o 3 -Preparation of NiCo composite coating; wherein the composition ratio of the NiCo target in steps 3 and 5 is Ni:Co=75:25, the purity is 99.999%, and the vacuum degree before sputtering is 8....

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Abstract

The invention discloses a composite coating fiber with an electromagnetic shielding function and a preparation method thereof. The composite coating fiber is composed of carbon fibers and a composite coating on the surfaces of the carbon fibers, wherein the composite coating comprises a lower magnetic layer, a middle Al2O3 layer and an upper magnetic layer. The preparation method comprises a step of, with the carbon fibers having undergone high-temperature pretreatment as a matrix, successively preparing the lower magnetic layer, the middle Al2O3 layer and the upper magnetic layer on the surface of the matrix by using a magnetron sputtering method so as to obtain the composite coating fiber. The composite coating fiber has good electromagnetic shielding effect in a wide frequency band range, can effectively adjust the electromagnetic parameters of the carbon fibers, maintains the excellent performance of the original carbon fibers, and has comprehensive properties like high strength, high modulus, corrosion resistance and excellent heat stability; and the composite coating fiber is slightly changed in diameter, has good flexibility and can be used for spinning. The preparation method for the composite coating fiber is simple to operate, low in cost and suitable for industrial production.

Description

technical field [0001] The invention relates to a functional fiber, in particular to a composite coating fiber with electromagnetic shielding function and a preparation method thereof, belonging to the field of electromagnetic shielding materials. Background technique [0002] With the rapid development of the modern electronic industry, electronic appliances and radio communications have been widely used, and electromagnetic radiation has become another major public hazard after noise pollution, air pollution, water pollution, and solid waste pollution. Electromagnetic waves not only interfere with the normal operation of various electronic equipment, threaten the information security of communication equipment, but also cause great harm to human health. At present, the main method to eliminate the hazards of electromagnetic waves is to use electromagnetic shielding materials to shield them. Therefore, exploring efficient electromagnetic shielding materials has become an u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/83D06M11/45D06M10/00D06M13/127C23C14/08C23C14/18C23C14/35D06M101/40
CPCC23C14/081C23C14/185C23C14/35D06M10/00D06M11/45D06M11/83D06M13/127D06M2101/40
Inventor 岳建岭王畅黄小忠杜作娟
Owner CENT SOUTH UNIV
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