MXene-based flexible polyvinyl alcohol electromagnetic shielding composite film and preparation method thereof

A polyvinyl alcohol, electromagnetic shielding technology, applied in the field of electromagnetic shielding materials, can solve the problem of shielding that has not been publicly reported, and achieve the effects of good electromagnetic shielding performance, excellent flexibility, and good flexibility
CN112876712AActive Publication Date: 2021-06-01BEIJING INSTITUTE OF TECHNOLOGYGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2021-06-01

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Abstract

The invention discloses an MXene-based flexible polyvinyl alcohol electromagnetic shielding composite film and a preparation method thereof, and belongs to the technical field of electromagnetic shielding materials. The invention relates to an MXene-based flexible polyvinyl alcohol electromagnetic shielding composite film and a preparation method thereof. The preparation method comprises the following steps of: etching an MAX phase with hydrofluoric acid to obtain layered MXene, then intercalating the MXene and graphene to obtain an MXene / Graphene compound, loading magnetic nanoparticles Fe3O4 on the MXene / Graphene to obtain a Fe3O4@MXene / Graphene ternary composite material, and finally dissolving the Fe3O4@MXene / Graphene ternary composite material and polyvinyl alcohol in deionized water and drying to obtain the polyvinyl alcohol composite film. The obtained polyvinyl alcohol film has very good flexibility and has good compatibility with a composite filler, and the electromagnetic shielding effectiveness in the X wave band can reach 38-52 dB. Layered MXene and graphene with good conductivity are beneficial to multi-reflection attenuation of electromagnetic waves, the impedance matching characteristic is optimized through combination with the magnetic particles Fe3O4, and attenuation of the electromagnetic waves is facilitated.
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Description

technical field

[0001] The invention relates to the technical field of electromagnetic shielding materials, in particular to an MXene-based flexible polyvinyl alcohol electromagnetic shielding composite film and a preparation method thereof. Background technique

[0002] The rapid development of modern electronic technology has brought serious electromagnetic interference while greatly facilitating social life, and the development trend of light weight and high integration of modern electronic equipment has put forward higher and higher requirements for electromagnetic shielding materials. Although traditional metals and their alloys have very good shielding effectiveness as electromagnetic shielding materials, their defects such as large mass, poor flexibility, high cost, and poor corrosion resistance greatly limit their application in the field of electromagnetic shielding materials. Polymers have attracted more and more attention in the field of electromagnetic shielding ...

Claims

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