Preparation method of high-light transmission electromagnetic shielding film

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...

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

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