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Preparation method of composite film with high light transmittance and excellent electromagnetic shielding performance

An electromagnetic shielding, high light transmittance technology, applied in the fields of magnetic field/electric field shielding, cable/conductor manufacturing, circuits, etc., can solve the problems of limited electromagnetic compatibility and protection applications, and achieve excellent electromagnetic shielding efficiency and excellent conformal ability. , the effect of high light transmittance

Active Publication Date: 2020-04-17
INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of conventional electromagnetic shielding materials that are difficult to have high light transmittance and excellent shielding performance at the same time, the present invention proposes to combine silver nanowires with PEDOT:PSS to prepare a conformal material with high light transmittance, outstanding electromagnetic shielding performance, and A new type of composite film with good performance can solve the problem of limited application of traditional shielding materials in electromagnetic compatibility and protection of aerospace systems, and provide new material options for electromagnetic protection design

Method used

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  • Preparation method of composite film with high light transmittance and excellent electromagnetic shielding performance
  • Preparation method of composite film with high light transmittance and excellent electromagnetic shielding performance
  • Preparation method of composite film with high light transmittance and excellent electromagnetic shielding performance

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preparation example Construction

[0032] Such as figure 1 As shown, a method for preparing a composite film with both high light transmittance and excellent electromagnetic shielding performance requires surface treatment of the substrate, preparation of silver nanowires and preparation of silver nanowire dispersions, and preparation of transparent silver nanowires by bar scraping. Conductive film, surface acid treatment of silver nanowire transparent conductive film, PEDOT:PSS coating, DBSA treatment of composite film, drying to obtain silver nanowire-(PEDOT:PSS) composite film, specifically including the following five steps:

[0033] Step 1, selecting a material with optical transparency as the substrate, and treating the surface of the substrate to improve the adhesion between the silver nanowire and the substrate;

[0034] Among them, the substrate can be selected from one of glass, polyethylene, polyethylene terephthalate, polycarbonate, etc., and the treatment process is as follows:

[0035] a. Cut the...

Embodiment

[0049] A method for preparing a composite film with high light transmittance and excellent electromagnetic shielding performance, such as figure 1 As shown, a polyethylene terephthalate (PET) substrate was used, and the PET substrate was cut into small pieces with a size of 100 mm × 100 mm, placed in acetone and absolute ethanol in turn, and ultrasonically treated for 30 min, respectively. After being rinsed with deionized water and blown dry, the surface of the PET substrate was treated with an oxygen plasma cleaning machine for 10 minutes, and finally the substrate was cleaned with deionized water, and the surface-treated substrate was obtained after drying.

[0050] At the same time, silver nanowires with a length of 25±3µm and a diameter of 30±2nm were prepared by chemical methods, and dispersed in a mixed solution of water and isopropanol (the volume ratio of water and isopropanol was 1:1). The concentration of silver nanowires is 1 mg / ml. After completing the surface tr...

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Abstract

The invention discloses a novel composite film preparation method with high light transmittance and excellent electromagnetic shielding effectiveness, which comprises the following steps: step 1, substrate surface treatment; 2, preparation of silver nanowire and preparing silver nanowire dispersion; 3, preparation of a silver nanowire transparent conductive film by a wire rod scrape coating method; 4, acid treat that surface of the silver nanowire film; 5, firstly placement of the substrate obtained in the step 4 on a glue homogenizer, uniformly coating PEDOT: PSS on the surface of the substrate, post-treating the dried composite film with DBSA, and spin-washing and drying the DBSA on the surface of the composite film with deionized water for many times to obtain silver nanowires; and 5, wherein the silver nanowires are coated on the surface of the substrate uniformly with PEDOT: PSS, and the silver nanowires are deposited on the surface of the composite film; and the silver nanowiresare deposited on the surface of the composite film. (PEDOT: PSS) composite film. A silver nanowire is prepared by the method of the invention (PEDOT: PSS) composite film has the characteristics of high light transmittance, outstanding electromagnetic shielding effectiveness and good conformability, which solves the problems of electromagnetic compatibility and protection application of traditionalshielding materials in aerospace system.

Description

technical field [0001] The invention belongs to the technical field of design and preparation of electromagnetic shielding materials, and in particular relates to a method for preparing a novel composite film with high light transmittance and excellent electromagnetic shielding performance. Background technique [0002] Nowadays, a large number of military and civilian high-power radars and communication equipment radiate electromagnetic waves of different frequencies and energies into the space when they are working, making the electromagnetic environment of space worse and worse; at the same time, the number of electronic equipment in the system is increasing. Exponential growth has led to an increase in the electromagnetic sensitivity of the system, which is susceptible to electromagnetic wave interference and may fail or even fail to work normally; research on electromagnetic protection is urgently needed. [0003] Shielding technology is one of the key technologies in e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H05K9/00
CPCH01B13/00H05K9/0081
Inventor 秦风严志洋蔡金良马弘舸
Owner INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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