Silver nanowire electromagnetic shielding film and preparation method thereof

A technology of electromagnetic shielding film and silver nanowires, which is applied in the fields of magnetic/electric field shielding, shielding materials, cable/conductor manufacturing, etc., can solve problems such as unfavorable electron conduction, achieve damage prevention, excellent electrical conductivity and electromagnetic shielding efficiency, and connect tight effect

Inactive Publication Date: 2020-01-03
宁波山功新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, this loose structure is not conducive to the conduction of electrons, which is a very unfavorable factor for electromagnetic shielding.

Method used

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  • Silver nanowire electromagnetic shielding film and preparation method thereof
  • Silver nanowire electromagnetic shielding film and preparation method thereof
  • Silver nanowire electromagnetic shielding film and preparation method thereof

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preparation example Construction

[0028] The invention relates to a preparation method of a silver nanowire electromagnetic shielding film. The silver nanowire electromagnetic shielding film of the invention is composed of a high molecular polymer substrate and a silver nanowire network layer. The polymer polymer base is formed by curing polymer solutions such as polycarbonate, polyurethane, polyacrylic acid and the corresponding curing agent in a certain proportion. Specifically, a low surface energy material such as polytetrafluoroethylene is selected as a mold, and the silver nanowire solution is spin-coated in the mold, and the silver nanowire film is obtained after drying, and the polymer solution and the curing agent are mixed in a certain proportion and then coated. A semi-embedded structure of silver nanowires@polymer substrate is made by covering the surface of the silver nanowire film. The semi-embedded structure of silver nanowires@polymer substrate completely fixes the silver nanowire network in th...

Embodiment 1

[0043] A silver nanowire electromagnetic shielding film and its preparation method:

[0044] Configure the silver nanowire solution: mix silver nanowires with a diameter of 50nm with ethanol to obtain a silver nanowire solution with a solid content of 8%;

[0045] Spin-coat the silver nanowire solution evenly on a polytetrafluoroethylene mold at a speed of 800r / min, and place the coated sample in an oven at 180°C to dry for 15 minutes to obtain a silver nanowire film with a thickness of 5 μm;

[0046] (1) In parts by mass, mix 3 parts of polyurethane solution and 1 part of butyl acetate and shake in an air bath constant temperature oscillator at 25°C (180 times / min) for 1 hour to make them evenly mixed;

[0047] (2) Put the mixed polyurethane polymer solution into a beaker, slowly pump out the air in the cavity with a vacuum pump, and keep the vacuum degree greater than -0.08MPa for 3 minutes. Repeat the above operation 3 times to ensure that the air bubbles in the solution a...

Embodiment 2

[0051] A silver nanowire electromagnetic shielding film and its preparation method:

[0052] First, the silver nanowire solution with a solid content of 8% is evenly spin-coated on a polytetrafluoroethylene mold at a speed of 800r / min, and the coated sample is placed in an oven at 180°C for 15 minutes to obtain silver nanowires. line film;

[0053] (1) According to the number of parts by mass, mix 10 parts of polydimethylsiloxane (PDMS) solution and 1 part of dibutyltin dilaurate and shake in an air bath constant temperature oscillator at 25°C (180 times / min) 1 hour to make it evenly mixed;

[0054] (2) Put the mixed polyurethane polymer solution into a beaker, slowly pump out the air in the cavity with a vacuum pump, and keep the vacuum degree greater than -0.08MPa for 3 minutes. Repeat the above operation 3 times to ensure that the air bubbles in the solution are removed;

[0055] (3) coating the prepared polyurethane solution onto the surface of the silver nanowire film,...

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Abstract

The invention relates to a silver nanowire electromagnetic shielding film and a preparation method thereof. The method comprises steps of coating a surface of a mold with silver nanowire solution, andperforming drying to obtain a silver nanowire film; coating a surface of the silver nanowire film with polymer solution mixture obtained by mixing polymer solution and curing agent, performing curingunder the constant temperature condition to obtain a semi-embedded structure of a silver nanowire@ polymer substrate, and separating the semi-embedded structure from a mold to obtain a silver nanowire electromagnetic shielding film. The method is advantaged in that damage of the external environment to the silver nanowire conductive networks can be effectively prevented, connection between the silver nanowire networks is tighter, and more excellent conductivity and electromagnetic shielding efficiency are achieved.

Description

technical field [0001] The invention relates to a semi-embedded electromagnetic shielding film based on silver nanowires and a preparation method thereof, and relates to the technical field of nanomaterials. Background technique [0002] The electromagnetic shielding film is an effective electromagnetic shielding spacer, which can replace the traditional metal grid to prevent electromagnetic radiation pollution. With the development of electromagnetic shielding products in the direction of lightweight and portable, there is an urgent need for new electromagnetic shielding products to be put into the market. With the development of society, electronic and electrical products are used more and more widely, which greatly facilitates people's daily life, but the resulting electromagnetic pollution, electromagnetic interference, leakage and other problems not only affect the normal operation of communication and other electronic equipment Work also has hidden dangers to human he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B5/14H05K9/00
CPCH01B5/14H01B13/0026H05K9/009
Inventor 高彦峰
Owner 宁波山功新材料科技有限公司
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