Novel light-transmitting electromagnetic protective film and preparation method thereof

An electromagnetic protection and thin film technology, which is applied in the direction of electrical components, magnetic/electric field shielding, coating, etc., can solve the problems of poor adhesion between silver nanowire conductive film and substrate, low uniformity of film, and increased manufacturing cost. To achieve the effect of highlighting electromagnetic shielding performance, good light transmittance and improving quality

Active Publication Date: 2020-10-27
INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the large-scale use in recent years, ITO films have exposed a large number of disadvantages: (1) Indium in ITO raw materials is a rare metal and is not renewable, and its price is increasingly expensive, which gradually increases the manufacturing cost of ITO films; (2) ITO The film is brittle and is not suitable for occasions that require the flexibility of the material; (3) The preparation methods of ITO films include magnetron sputtering, chemical vapor deposition, vacuum reaction evaporation, laser pulse deposition, etc. Process control has extremely high requirements and is expensive; (4) ITO has strong water absorption and is easy to absorb CO in the air 2 Chemical changes with water, resulting in "mildew"
[0005] However, the light-transmitting electromagnetic protective film based on silver nanowires still has the problems of poor adhesion between the conductive film of silver nanowires and the substrate, easy to fall off, and there are also problems of low film uniformity and insufficient stability in the air.

Method used

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  • Novel light-transmitting electromagnetic protective film and preparation method thereof
  • Novel light-transmitting electromagnetic protective film and preparation method thereof
  • Novel light-transmitting electromagnetic protective film and preparation method thereof

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preparation example Construction

[0046] like figure 1 As shown, a new method of preparing a light-transmitting electromagnetic protective film requires pretreatment of an optically transparent substrate, preparing a silver nanowire film on an optically transparent substrate, and vacuum drying to obtain a light-transmitting electromagnetic protective film, which specifically includes the following three steps :

[0047] Step a: Pretreating the surface of the optically transparent substrate with a mixed solution of deionized water, acetone and absolute ethanol or plasma cleaning;

[0048] Step b: Place the pretreated optically transparent substrate on the operating table of the coating machine, evenly drop the silver nanowire coating solution on the upper edge of the substrate, and drop a row of coating solution at a certain distance to start the coating mechanism Prepare silver nanowire film;

[0049] Step c: drying the silver nanowire film by a two-stage drying process under vacuum conditions to prepare a n...

Embodiment 1

[0055] A novel transparent electromagnetic protective film is prepared by preparing a silver nanowire film on a polyethylene terephthalate (PET) substrate with a silver nanowire coating liquid, and finally drying it.

[0056] Among them, the silver nano coating solution includes 100 parts of silver nanowire solution, 0.1 part of KYC-913 dispersant, 0.1 part of KYC-643 wetting agent, and 0.2 part of water-soluble polyurethane by volume; the silver nanowire solution will be prepared by chemical methods The prepared silver nanowires with a length of 25±2 μm and a diameter of 25±2 nm were dispersed in deionized water to form a silver nanowire solution with a concentration of 1 mg / ml.

[0057] The preparation method of novel transparent electromagnetic protective film comprises the following steps:

[0058] Step a: Cut the PET substrate into a square of 340mm×340mm, then place it in a mixture of deionized water, acetone and absolute ethanol (volume ratio: 2:1:1) for ultrasonic trea...

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Abstract

The invention discloses a novel light-transmitting electromagnetic protective film and a preparation method thereof. The novel light-transmitting electromagnetic protection film is prepared on an optical transparent substrate, the light-transmitting electromagnetic protective film is prepared from silver nanowire coating liquid, and the silver nanowire coating liquid comprises, by volume, 100 parts of a silver nanowire solution, 0.05-0.5 part of a dispersing agent, 0.05-0.5 part of a wetting agent and 0.05-0.5 part of a binding agent. The preparation method comprises the following steps of 1,substrate surface pretreatment, 2, preparing a silver nanowire film on the substrate, and 3, drying the silver nanowire film to obtain the novel light-transmitting electromagnetic protective film. Thenovel light-transmitting electromagnetic protective film provided by the invention has good adhesion performance and uniformity.

Description

technical field [0001] The invention relates to a novel light-transmitting electromagnetic protective film and a preparation method thereof, belonging to the technical field of design and preparation of electromagnetic shielding materials. Background technique [0002] With the rapid development of electronic information technology and communication technology, the space is filled with a large number of electromagnetic waves with different energies and rich spectrum information, resulting in serious electromagnetic pollution problems, which pose a great threat to electronic equipment and human health. The use of electromagnetic protection materials to isolate electromagnetic waves in space and reduce their impact on various electronic equipment and human bodies is an important means of electromagnetic protection. At present, the commonly used electromagnetic protection materials include metal materials, carbon materials and conductive polymer materials; however, in some spec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00B05D5/06B05D5/12B05D7/24
CPCB05D5/06B05D5/12B05D7/24H05K9/0081H05K9/0094
Inventor 秦风张小刚严志洋范晋锋
Owner INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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