Preparation method of high-light transmission electromagnetic shielding film

A technology of electromagnetic shielding and transparent conductive film, applied in the direction of magnetic field/electric field shielding, electrical components, etc., can solve the problems of poor shielding effect, reduced electromagnetic shielding performance, gap leakage, etc., to facilitate large-scale industrial production and improve electromagnetic Effect of shielding performance and high electromagnetic shielding performance

Inactive Publication Date: 2019-05-07
青岛九维华盾科技研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently commonly used materials include indium tin oxide (ITO), metal grids, and individual nano-silver wires. Among them, the ITO film is limited by its own physical properties, and has high cost, poor flexibility, difficulty in forming a large-scale film, and poor shielding effect; metal The performance of the grid is limited by the grid preparation process. The pursuit of a fine grid is not only difficult to achieve but also increases the cost significantly, which is not suitable for large-scale film formation; single nano-silver wires, the gaps between the wires can transmit light, but There is a wave leakage phenomenon in the gap, which leads to a decrease in electromagnetic shielding performance

Method used

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  • Preparation method of high-light transmission electromagnetic shielding film
  • Preparation method of high-light transmission electromagnetic shielding film
  • Preparation method of high-light transmission electromagnetic shielding film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Put the polyethylene terephthalate base body into ethanol for 10 minutes and sonicate for 10 minutes, and the ultrasonic power is 100W to remove impurities on the surface of the base body.

[0032] (2) Disperse the silver nanowires in the polyurethane aqueous solution, the solid content of the silver nanowires is 1.5‰, and the solid content of the polyurethane is 2‰. Take 1mL of the mixed solution and add it dropwise on the surface of the transparent substrate, and use a wire rod to evenly coat the liquid on the surface of the transparent substrate. Put the transparent substrate in an oven at 60°C and heat for 20 minutes.

[0033] (3) Put the cooled transparent substrate into a solution containing silver nitrate at a concentration of 1 mM, apply a voltage of 5 V, and electroplate for 10 min. Then ultrasonicated in ethanol for 5 minutes, the ultrasonic power was 100W to remove the residual substances on the surface. After the ultrasound is finished, put it in an ov...

Embodiment 2

[0038] (1) Put the polyethylene naphthalate base body into ethanol and ultrasonicate for 30 minutes with an ultrasonic power of 200W to remove impurities on the surface of the base body.

[0039] (2) Disperse the nano-silver wires in polyacrylic acid resin, the solid content of the nano-silver wires is 2‰, and the solid content of the polyacrylic resin is 2‰. Take 1mL of the mixed solution and add it dropwise on the surface of the transparent substrate, and use a wire rod to evenly coat the liquid on the surface of the transparent substrate. Put the transparent substrate in an oven at 60°C and heat for 10 minutes.

[0040] (3) Put the cooled transparent substrate into an aqueous solution containing silver nitrate at a concentration of 2mM, apply a voltage of 12V, and electroplate for 3min. Then ultrasonicate in ethanol for 5 minutes, the ultrasonic power is 200W to remove the remaining substances on the surface. After the ultrasound is finished, put it in an oven at 150°C an...

Embodiment 3

[0044] (1) Put the polymethyl methacrylate substrate into ethanol and ultrasonicate for 20 minutes with an ultrasonic power of 200W to remove impurities on the surface of the substrate.

[0045] (2) Disperse the silver nanowires in an aqueous solution of epoxy resin, the solid content of the silver nanowires is 1.5‰, and the solid content of the epoxy resin is 2‰. Take 1mL of the mixed solution and add it dropwise on the surface of the transparent substrate, and use a wire rod to evenly coat the liquid on the surface of the transparent substrate. Put the transparent substrate in an oven at 150°C and heat for 30 minutes.

[0046] (3) Put the cooled transparent substrate into an aqueous solution containing silver nitrate at a concentration of 10 mM, apply a voltage of 12 V, and electroplate for 3 minutes. Then ultrasonicate in ethanol for 5 minutes, the ultrasonic power is 200W to remove the remaining substances on the surface. After the ultrasound is finished, put it in an ov...

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Abstract

The invention belongs to the field of electronic materials, and provides a preparation method of a high-light transmission electromagnetic shielding film. The preparation method comprises the steps ofmixing a one-dimensional nanometer conductive material and resin to obtain uniform conductive ink, coating a washed clean transparent substrate with the conductive ink, and baking to form a grid transparent conductive film; soaking the material in an electrochemical film-plating solution for electroplating, adding voltage to enable electroplated metal to grow along the surface of the grid transparent conductive film so as to improve the conductivity and the electromagnetic shielding performance and form a conductive layer; then coating a high-molecular conductive polymer, enabling the conductive layer to form a complete conductive surface layer so as to further improve the electromagnetic shielding, and finally forming a transparent protective layer through coating thermal curing or photocuring hardened resin so as to complete the preparation of the film with high light transmission and good electromagnetic shielding performance. The thin prepared according to the invention has high light transmission and electromagnetic shielding performance, and is low in cost, simple in preparation and conducive to large-scale industrial production.

Description

technical field [0001] The invention relates to the field of electronic materials, in particular to a preparation method of a highly transparent electromagnetic shielding film. Background technique [0002] In recent years, with the rapid development of electronics and communication technology, electronic and communication equipment have been widely used in various industries. The operation of these electronic and communication devices produces a lot of electromagnetic radiation. The leakage of these electromagnetic radiation can not only interfere with the normal operation of the equipment, but also cause the paralysis of the equipment. The leakage of electromagnetic waves can also cause harm to the human body and other living things. At present, electromagnetic waves mainly leak through light-transmitting parts such as windows. These parts not only require high electromagnetic shielding performance, but also require high light transmittance. [0003] High light transmitt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00C25D3/46C25D3/48C25D3/38
Inventor 王向伟彭锐晖于志伟吕永胜沙建军杨高峰荣先辉
Owner 青岛九维华盾科技研究院有限公司
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