Preparation method of silver nanowire flexible transparent conductive film based on phenolic resin

Abstract

The invention provides a method for preparing a flexible transparent conductive film of silver nanowires based on phenolic resin. A dispersion liquid containing silver nanowires is coated on a clean substrate, and after drying, a conductive network of silver nanowires is obtained on the substrate. layer; and then coating a layer of transparent conductive glue on the silver nanowire layer as a protective layer. After drying the conductive adhesive, coat a layer of phenolic resin solution on the conductive adhesive, and dry again to remove the solvent. The dried composite conductive film is peeled off from the substrate to obtain a flexible transparent conductive film with low resistance and high flatness. The present invention uses phenolic resin as the flexible substrate, and introduces a transparent conductive adhesive layer between it and the silver nanowire layer, so as to increase the bonding between the flexible substrate and the silver nanowire layer and protect the silver nanowire layer from oxidation . The method solves the problems of poor adhesion between the silver nanowire conductive layer and other flexible substrates and the large surface roughness and large resistance value of the flexible conductive film in the existing preparation method, and has practical application value.

Description

technical field [0001] The invention belongs to the technical field of transparent conductive films, and relates to a method for preparing a silver nanowire flexible transparent conductive film based on phenolic resin. Background technique [0002] Silver is widely used in many aspects due to its excellent electrical and thermal conductivity, such as conductive silver glue, etc. Silver nanowires are important conductive materials in fields such as touch screens and semiconductor devices. Compared with commonly used metal oxide conductive materials, silver nanowires overcome the shortcomings of metal oxides such as brittleness and low conductivity. Compared with graphene and carbon nanotubes, which are currently being researched hotly, silver nanomaterials are cheaper and are currently the most likely breakthrough conductive material. [0003] At present, when silver nanowires are used to prepare conductive films, the method of directly coating silver nanowire dispersion li...

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Problems solved by technology

This method has the following problems: 1. The adhesion of the silver nanolayer on the base film is poor; 2. The surface roughness of the silver nanowire layer is large; 3. The silver nanowire is easily oxidized when exposed to air

[0004] In response to this problem, patent CN110277198A proposed a method of adding a layer of UV light-curable resin as an adhesive layer between the polydimethylsiloxane matrix layer and the silver nanowire layer to improve the silver nanowire layer. Disadvantages of poor adhesion to polydimethylsiloxane substrates

However, the photocurable resin itself is not conductive. After covering the surface of the silver nanowire layer, the contact path between the silver nanowires is isolated, so that the resistance increases and the ideal conductive effect cannot be achieved.

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