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A kind of electromagnetic shielding composite film material and its preparation and application

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

Inactive Publication Date: 2018-05-15
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, many electromagnetic shielding materials on the market are made by metal plating, coating, pasting or blending conductive fibers on the surface of the material. Many problems are prone to occur in the process of preparation and use, such as poor bonding ability between metal and material, and easy to fall off. , the coating is easily scratched and loses shielding performance, the preparation process is seriously polluted, etc., and the material is relatively rough, poor in flexibility, airtight, poor in touch, not wearable, and it is difficult to meet the "thinness" required by modern electromagnetic shielding materials. Therefore, it is urgent to develop a wearable electromagnetic shielding material with high electromagnetic shielding performance, good flexibility, light weight, good durability, and

Method used

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  • A kind of electromagnetic shielding composite film material and its preparation and application
  • A kind of electromagnetic shielding composite film material and its preparation and application
  • A kind of electromagnetic shielding composite film material and its preparation and application

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

technical field [0001] The invention belongs to the field of electromagnetic shielding material and its preparation and application, in particular to an electromagnetic shielding composite film material and its preparation and application. Background technique [0002] With the rapid development of the modern electronics industry, electronic appliances and radio communications are widely used, and the problem of electromagnetic interference caused by electromagnetic waves is becoming more and more serious. Electromagnetic wave pollution has become another major public hazard after noise pollution, air pollution, water pollution, and solid waste pollution. . Electromagnetic waves will not only interfere with the normal operation of various electronic equipment, threaten the information security of communication equipment, but also cause great harm to human health. At present, the main method to eliminate the hazards of electromagnetic waves is to use electromagnetic shieldin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B9/00B32B9/04B32B27/28B32B33/00B32B37/12C09J183/04H05K9/00
CPCB32B9/007B32B9/045B32B27/28B32B33/00B32B37/12B32B2255/10B32B2255/20B32B2255/26B32B2255/28B32B2307/212B32B2307/54B32B2307/558B32B2307/718B32B2437/00B32B2571/00C09J183/04H05K9/0088
Inventor 许福军孙立军
Owner DONGHUA UNIV
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