Electromagnetic shielding composite membrane material and preparation and application thereof

A technology of electromagnetic shielding and composite film, which is applied in the fields of magnetic field/electric field shielding, application, and other household appliances, etc. It can solve the problems of poor bonding ability between metal and material, easily scratched coating, loss of shielding performance, etc., and achieve electromagnetic shielding performance Excellent, not easy to wear, improve safety and durability

Inactive Publication Date: 2016-12-07
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a flexible electromagnetic shielding composite film that uses a carbon nanotube film as the main material. It combines graphene and polyaniline on the upper and lower surfaces of the carbon nanotube film, and is protected by a resin coating. This composite film has directionality, allowing for enhanced reflection and absorption of electromagnetic waves. It has excellent electromagnetic shielding performance, good flexibility, and can withstand bending and compression deformation. The material can be customized in terms of thickness, shape, and size, making it suitable for various applications such as smart wearable clothing and military and civilian protection. The preparation process is simple and suitable for industrial production. Overall, this invention provides a durable and effective solution for electromagnetic shielding.

Problems solved by technology

The technical problem addressed in this patented text relates to developing a comfortable and flexible electro-magnetic (EM) shield for protection from unwanted signals while still being able to maintain its effectiveness over time due to environmental factors like temperature changes and moisture content.

Method used

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  • Electromagnetic shielding composite membrane material and preparation and application thereof
  • Electromagnetic shielding composite membrane material and preparation and application thereof
  • Electromagnetic shielding composite membrane material and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) The selected size is 20×20cm 2 The carbon nanotube membrane 1 (Suzhou Institute of Nanotechnology and Nanobionics, Chinese Academy of Sciences), the thickness of the membrane is 20 μm, the porosity is 75%, the tensile strength is about 200MPa, and the electrical conductivity is about 1×10 5 S / m;

[0036] (2) select the graphene suspension of 2mg / ml (New Material Co., Ltd.);

[0037] (3) Polyaniline (Alfa Aisha Co.), the conductivity of which is 1 S / cm.

[0038] (4) Mix PDMS (polydimethylsiloxane) liquid (Dow Corning DC184) and curing agent uniformly at a ratio of 10:1 to obtain PDMS liquid adhesive 3, and the protective layer resin adopts water-soluble polyurethane resin 4 (Bayer Technology Ltd.).

[0039] Preparation steps:

[0040] The uniformly dispersed graphene suspension was deposited on a layer of ultra-thin carbon nanotube film through Buchner funnel suction filtration, and dried naturally at room temperature to obtain an ultra-thin carbon nanotube / graph...

Embodiment 2

[0045] (1) The selected size is 60×20cm 2 The carbon nanotube membrane 1 (Suzhou Institute of Nanotechnology and Nanobionics, Chinese Academy of Sciences), the thickness of the membrane is 20 μm, the porosity is 75%, the tensile strength is about 200MPa, and the electrical conductivity is about 1×10 5 S / m;

[0046] (2) select the graphene suspension of 2mg / ml (New Material Co., Ltd.);

[0047] (3) Polyaniline (Alfa Aisha Co.), the conductivity of which is 1 S / cm.

[0048] (4) Mix PDMS (polydimethylsiloxane) liquid (Dow Corning DC184) and curing agent in a ratio of 10:1 to obtain PDMS liquid adhesive 3, and coat the upper and lower surfaces of the carbon nanotube composite film As protective layer resin 4.

[0049] Preparation steps:

[0050] The uniformly dispersed graphene suspension was deposited on a layer of ultra-thin carbon nanotube film through Buchner funnel suction filtration, and dried naturally at room temperature to obtain an ultra-thin carbon nanotube / graphene...

Embodiment 3

[0054] (1) The selected size is 20×20cm 2 The carbon nanotube membrane 1 (Suzhou Institute of Nanotechnology and Nanobionics, Chinese Academy of Sciences), the thickness of the membrane is 20 μm, the porosity is 75%, the tensile strength is about 200MPa, and the electrical conductivity is about 1×10 5 S / m;

[0055] (2) select the graphene suspension of 2mg / ml (New Material Co., Ltd.);

[0056] (3) Polyaniline 2 (Alfa Aisha Co.), the conductivity of which is 1 S / cm.

[0057] (4) Mix PDMS (polydimethylsiloxane) liquid (Dow Corning DC184) and curing agent uniformly at a ratio of 10:1 to obtain PDMS liquid adhesive 3, and the protective layer resin adopts water-soluble polyurethane resin 4 (Bayer Technology Ltd.).

[0058] (5) Use acrylic transparent double-sided adhesive tape 5 (Shanghai Canxing Composite Material Co., Ltd.) with a thickness of 0.5mm, and the size is 20×20cm 2 .

[0059] Preparation steps:

[0060] The uniformly dispersed graphene suspension was deposited o...

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Abstract

The invention relates to an electromagnetic shielding composite membrane material and preparation and application thereof. The electromagnetic shielding composite membrane material comprises a graphene/carbon nanotube composite membrane (1), a polyaniline membrane (2) and protective layer resin (4). The polyaniline membrane (2) adheres to the surface of a carbon nanotube thin film in the graphene/carbon nanotube composite membrane through an adhesive (3). The preparation includes the steps that graphene suspension liquid is deposited on the carbon nanotube thin film, and the mixture is naturally aired at room temperature to obtain the graphene/carbon nanotube composite membrane; the polyaniline membrane adheres to the surface of the carbon nanotube thin film in the graphene/carbon nanotube composite membrane through the adhesive to form a graphene/carbon nanotube/polyaniline composite membrane; then the upper surface and the lower surface of the composite membrane are coated with the resin, curing is carried out, and the electromagnetic shielding composite membrane material is obtained. The electromagnetic shielding performance of the electromagnetic shielding composite membrane material is excellent, and meanwhile the electromagnetic shielding composite membrane material can bear certain bending and compression deformation; the flexible electromagnetic shielding membrane can be widely applied to the fields such as intelligent wearable garments and multifunctional electromagnetic protection fabric.

Description

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Claims

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Application Information

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Owner DONGHUA UNIV
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