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A kind of flexible and stretchable electromagnetic shielding fabric and its preparation method

An electromagnetic shielding and elastic fabric technology, applied in the field of electromagnetic shielding materials and flexible and stretchable electromagnetic shielding fabrics, can solve the problems of poor bonding force between metal and fabric, serious pollution in the preparation process, poor product shielding performance, etc., and achieve electromagnetic shielding performance. Stable, wide application prospects, the effect of absorbing frequency bandwidth

Active Publication Date: 2019-03-29
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Gold-plated coated fabric has problems such as poor bonding between metal and fabric, easy to fall off, easy to scratch the coating and lose shielding performance, and serious pollution in the preparation process. So far, it has not been widely used in the field of electromagnetic shielding, while metal fiber blended fabric There are also problems such as easy entanglement during the weaving process, easy breakage of metal fibers, low production efficiency, and high production costs, and the shielding performance of the products produced is relatively poor.

Method used

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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  • A kind of flexible and stretchable electromagnetic shielding fabric and its preparation method
  • A kind of flexible and stretchable electromagnetic shielding fabric and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Ultrathin Elastic and Stretchable Electromagnetic Shielding Fabric

[0032] A method for preparing a flexible and stretchable electromagnetic shielding fabric, the specific steps are:

[0033] The first step: immerse the carbon nanotube film in the graphene suspension for 3 hours, take it out, and dry it naturally at room temperature to obtain a flexible nano-electromagnetic shielding composite film 3, and pass conductive silver at both ends of the flexible nano-electromagnetic shielding composite film 3 Adhesive copper wire electrodes.

[0034] The carbon nanotube film is 60×40cm 2 The carbon nanotube film (Suzhou Institute of Nanotechnology and Nanobionics, Chinese Academy of Sciences), made of multi-walled carbon nanotubes, the diameter of carbon nanotubes is 20nm, the film thickness is 20μm, the porosity is 75%, and the tensile strength is about 200MPa , the conductivity is about 1×10 5 S / m. The concentration of the graphene suspension is 2mg / ml (New ...

Embodiment 2

[0042] Example 2: Polyester electromagnetic shielding fabric

[0043] A method for preparing a flexible and stretchable electromagnetic shielding fabric, the specific steps are:

[0044] The first step: immerse the carbon nanotube film in the graphene suspension for 3 hours, take it out, and dry it naturally at room temperature to obtain a flexible nano-electromagnetic shielding composite film 3, and pass conductive silver at both ends of the flexible nano-electromagnetic shielding composite film 3 Adhesive copper wire electrodes.

[0045] The carbon nanotube film is 60×40cm 2The carbon nanotube film (Suzhou Institute of Nanotechnology and Nanobionics, Chinese Academy of Sciences), made of multi-walled carbon nanotubes, the diameter of carbon nanotubes is 20nm, the film thickness is 20μm, the porosity is 75%, and the tensile strength is about 200MPa , the conductivity is about 1×10 5 S / m. The concentration of the graphene suspension is 2mg / ml (New Material Co., Ltd.), impr...

Embodiment 3

[0053] Embodiment 3: wear-resistant elastic electromagnetic shielding fabric with ultra-high shielding effectiveness

[0054] A method for preparing a flexible and stretchable electromagnetic shielding fabric, the specific steps are:

[0055] The first step: immerse three carbon nanotube films in the graphene suspension for 3 hours, take them out, and dry them naturally at room temperature to obtain three layers of flexible nano-electromagnetic shielding composite films 3, of which two layers of flexible nano-electromagnetic shielding composite films One end of 3 is attached to a copper wire electrode by coating conductive silver glue.

[0056] The carbon nanotube film is 60×40cm 2 The carbon nanotube film (Suzhou Institute of Nanotechnology and Nanobionics, Chinese Academy of Sciences), made of multi-walled carbon nanotubes, the diameter of carbon nanotubes is 20nm, the film thickness is 20μm, the porosity is 75%, and the tensile strength is about 200MPa , the conductivity ...

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Abstract

The invention provides a flexible stretchable electromagnetic shielding fabric and a preparation method thereof. The method for preparing the flexible stretchable electromagnetic shielding fabric comprises the following steps: selecting a spandex stretch fabric as an elastic adhesion matrix, applying a certain tension to two ends of the fabric, stretching the fabric to a certain elongation and fixing, and coating a layer of liquid elastic adhesives on the surface of the elastic adhesion matrix; performing pressure dipping on a flexible nano electromagnetic shielding composite film on the liquid elastic adhesives, coating a layer of liquid elastic adhesives on the upper side of the flexible nano electromagnetic shielding composite film, allowing the composite film to be adhered to another spandex stretch fabric, and curing the adhesives under a certain conditions; releasing the tension applied to the elastic adhesion matrix so as to drive the flexible nano electromagnetic shielding composite film to retract, thereby obtaining the flexible stretchable electromagnetic shielding fabric. The flexible stretchable electromagnetic shielding fabric disclosed by the invention has the characteristics of high elasticity, high elongation, excellent electromagnetic shield property and the like.

Description

technical field [0001] The present invention relates to the field of electromagnetic shielding materials, more specifically, to the field of flexible and stretchable electromagnetic shielding fabrics. Background technique [0002] With the rapid development of today's society, modern technology is changing with each passing day, electrical products are becoming more and more common, and the problems caused by electromagnetic radiation are becoming more and more serious. Compared with other electromagnetic shielding materials, electromagnetic shielding fabrics are closer to people's lives, which not only meet the needs of people's daily life, but also play a protective role. Therefore, electromagnetic shielding fabrics have become a hot research topic and have developed rapidly in recent years. [0003] Traditional electromagnetic shielding fabrics can be divided into metal-plated fabrics, surface-coated fabrics, metal foil-attached fabrics, conductive fiber blended fabrics,...

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M17/04D06M17/00D06M17/10
CPCD06M17/00D06M17/04D06M17/10
Inventor 许福军高扬
Owner DONGHUA UNIV
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