A kind of multi-layer electromagnetic shielding composite material based on isolation structure and its preparation method and application

A technology of electromagnetic shielding and composite materials, applied in the fields of magnetic field/electric field shielding, chemical instruments and methods, lamination, 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
CN112848586BActive Publication Date: 2022-06-07CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Publication Date
2022-06-07

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Abstract

The invention provides an electromagnetic shielding composite material, comprising an absorbing layer and a reflective layer compounded on the absorbing layer; the absorbing layer includes a modified resin layer; the modified resin layer has an isolation structure; the reflective layer includes a metal nanowire film. The invention adopts a specific layer material, combined with a laminated structure of absorbing layer-reflecting layer, and the absorbing layer is a special isolation structure, and obtains an electromagnetic shielding composite material with a specific structure and composition. The present invention can have many advantages such as high electromagnetic shielding efficiency, low electromagnetic wave reflection and excellent mechanical properties, and the absorbing layer is a special isolation structure, which can promote the overlapping of fillers inside the absorbing layer to form a filler network to maximize the The shielding efficiency of the absorbing layer further reduces the reflection of the composite material on electromagnetic waves. The electromagnetic shielding composite material can replace the traditional electromagnetic shielding composite material and be used in the emerging 5G communication field and aerospace field.
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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, a preparation method and application thereof, and in particular to a multilayer electromagnetic shielding composite material based on an isolation structure, a preparation method and application thereof. Background technique

[0002] The development of electronic information technology brings great convenience to people, but also produces a lot of electromagnetic pollution. A large amount of electromagnetic pollution affects the normal operation of instruments and equipment, especially the emerging 5G communication field and aerospace field 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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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