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Silver nanotube network film based on electromagnetic interference shielding and preparation method thereof

A technology of electromagnetic interference shielding and silver nanotubes, which is applied in the direction of chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems of mechanical performance impact, difficulty in large-scale production, etc., and reduce the intensity of light and reflective interference, avoiding the effect of visual impairment

Active Publication Date: 2022-03-11
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the contact resistance between AgNWs has a severe impact on the EMI SE and mechanical properties of the entire network
AgNWs need to be strengthened twice by perfect welding technique or strong surface coating, which is undoubtedly a complicated problem and difficult to mass-produce

Method used

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  • Silver nanotube network film based on electromagnetic interference shielding and preparation method thereof
  • Silver nanotube network film based on electromagnetic interference shielding and preparation method thereof
  • Silver nanotube network film based on electromagnetic interference shielding and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) The PVA solution with a mass fraction of 10% was stirred and heated at 65° C. and 1300 rpm for 12 hours, and the PVA solution was cooled to room temperature and injected into an electrospinning device. The spinneret is connected to the positive pole of the high-voltage power supply, the working voltage is maintained at 12kV, and the working distance between the spinning nozzle and the receiving ring should be kept at 12 cm. Prepare PVA cores 5 arranged in a line to obtain a PVA nanofiber membrane. The electrospinning time directly determines the mass density of the AgNTs network, thereby affecting the EMI SE and transmittance.

[0037] (2) Place the PVA nanofiber film obtained in step (1) in an 80% RH oven at 65°C for 550s to dissolve the binding part of the PVA nanofiber, then heat it at 65°C for 550s in a vacuum and non-humid environment to remove moisture, and make the nanofiber The fibers are perfectly interconnected.

[0038] (3) Prepare the outer Ag layer 4 ...

Embodiment 2

[0041] (1) The PVA solution with a mass fraction of 12% was stirred and heated at 75° C. and 1500 rpm for 21 hours, and the PVA solution was cooled to room temperature and injected into an electrospinning device. The spinneret is connected to the positive pole of the high-voltage power supply, the working voltage is maintained at 15kV, and the working distance between the spinning nozzle and the receiving ring should be kept at 15 cm. Prepare PVA cores 5 arranged in a line to obtain a PVA nanofiber membrane. The electrospinning time directly determines the mass density of the AgNTs network, thereby affecting the EMI SE and transmittance.

[0042] (2) Place the PVA nanofiber film obtained in step (1) in an 85% RH oven at 75°C for 650s to dissolve the binding part of the PVA nanofiber, then heat it at 75°C for 650s in a vacuum and non-humid environment to remove moisture, and make the nanofiber The fibers are perfectly interconnected.

[0043] (3) Prepare the outer Ag layer 4 ...

Embodiment 3

[0046] (1) The PVA solution with a mass fraction of 15% was stirred and heated at 70° C. and 1400 rpm for 24 hours, and the PVA solution was cooled to room temperature and injected into an electrospinning device. The spinneret is connected to the positive pole of the high-voltage power supply, the working voltage is maintained at 18kV, and the working distance between the spinning nozzle and the receiving ring should be kept at 18 cm. Prepare PVA cores 5 arranged in a line to obtain a PVA nanofiber membrane. The electrospinning time directly determines the mass density of the AgNTs network, thereby affecting the EMI SE and transmittance.

[0047] (2) Place the PVA nanofiber film obtained in step (1) in a 90% RH oven at 70°C for 600s to dissolve the binding part of the PVA nanofiber, then heat it at 70°C for 600s in a vacuum and non-humid environment to remove moisture, and make the nanofiber The fibers are perfectly interconnected.

[0048] (3) Prepare the outer Ag layer 4 o...

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Abstract

The invention belongs to the technical field of electromagnetic shielding materials, and particularly relates to a silver nanotube network film based on electromagnetic interference shielding and a preparation method. Based on a uniform and large-scale nanofiber skeleton, a stable, integrated and interconnected high-performance silver nanotube network film is prepared by adopting a physical deposition technology. The simple integrated preparation process can bring high comprehensive performance to a large-scale AgNTs network. The results show that the flexible transparent EMI shielding film based on the AgNTs network has huge potential in aviation and industrial optical systems and has a good market prospect.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic shielding materials, in particular to a silver nanotube network film based on electromagnetic interference shielding and a preparation method. Background technique [0002] With the progress of society, it is urgent to develop flexible transparent electromagnetic interference (EMI) shielding materials with excellent comprehensive properties as visual windows and display devices in aviation, industry, medical and research institutions. This plays a decisive role in the design and preparation of flexible transparent EMI shielding materials. As an integral part of visible windows and display devices, it is particularly important to improve the performance of flexible transparent EMI shielding materials. Indium tin oxide (ITO) thin films are widely used commercially as EMI shielding materials due to their acceptable EMI SE and transmittance. However, in recent years, with the increasing dema...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/36B32B27/28B32B27/08B32B9/00B32B9/04D06M11/83D06M101/24
CPCB32B27/06B32B27/36B32B27/283B32B27/08B32B5/028D06M11/83D06M2101/24
Inventor 江诚鸣夏嘉临孙楠徐睿文陶志远彭艳曾丽君谭东宸
Owner DALIAN UNIV OF TECH
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