Multilayer electromagnetic shielding composite material based on bicontinuous structure and preparation method and application thereof

A composite material and electromagnetic shielding technology, which is applied in the fields of magnetic/electric field shielding, chemical instruments and methods, coatings, etc., can solve problems such as the mismatch between composite materials and air impedance, the reduction of mechanical properties of composite materials, and the inability to meet practical applications. Achieve the effects of improving shielding efficiency, high electromagnetic shielding effectiveness, and excellent mechanical properties
CN112743945AActive Publication Date: 2021-05-04CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Publication Date
2021-05-04

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Abstract

The invention provides an electromagnetic shielding composite material. The electromagnetic shielding composite material comprises an absorbing layer and a reflecting layer compounded on the absorbing layer, the absorbing layer comprises a modified resin layer with a bicontinuous structure; and the reflecting layer comprises a metal nanowire film layer. According to the electromagnetic shielding composite material, the specific layer material is adopted, the absorption layer is of the special bicontinuous structure, the absorption layer-reflection layer stacked structure is combined, and the electromagnetic shielding composite material with the specific structure and composition is obtained. The composite material has the advantages of high electromagnetic shielding effectiveness, low electromagnetic wave reflection, excellent mechanical property and the like, the special bicontinuous structure of the absorption layer can promote mutual lap joint of fillers in the absorption layer to form a filler network, the shielding efficiency of the absorption layer is further improved, and reflection of the composite material to electromagnetic waves is further reduced. The composite material can replace a traditional electromagnetic shielding composite material to be applied to the fields of emerging 5G communication and aerospace.
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Description

technical field

[0001] The invention belongs to the technical field of electromagnetic shielding materials, and relates to an electromagnetic shielding composite material and its preparation method and application, in particular to a double-continuous structure-based multilayer electromagnetic shielding composite material and its preparation method and application. Background technique

[0002] The development of electronic information technology has brought great convenience to people, but also produced a lot of electromagnetic pollution. A large amount of electromagnetic pollution affects the normal operation of instruments and equipment, especially the emerging 5G communication and aerospace have stricter requirements on the anti-interference ability of signals. Therefore, various electromagnetic shielding composite materials have been developed.

[0003] Traditional electromagnetic shielding composite materials mostly use a blending process to mix polymer resins and fil...

Claims

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