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

Abstract

The invention provides a preparation method of a silver nanowire flexible transparent conductive film based on phenoxy resin. The method comprises the following steps: coating a cleaning substrate with a dispersion liquid containing silver nanowires, and drying the dispersion liquid to obtain a silver nanowire conductive network layer on the substrate; coating a layer of transparent conductive adhesive on the silver nanowire layer to serve as a protective layer; drying the conductive adhesive, coating a layer of phenoxy resin solution on the conductive adhesive, and carrying out drying again to remove a solvent; and stripping the dried composite conductive film from the substrate to obtain the flexible transparent conductive film with low resistance and high flatness. According to the invention, the phenoxy resin is used as the flexible base material, and the transparent conductive adhesive layer is introduced between the phenoxy resin and the silver nanowire layer, so that the effectsof increasing the adhesion between the flexible base material and the silver nanowire layer and protecting the silver nanowire layer from oxidation are achieved. The problems of poor adhesion betweenthe silver nanowire conductive layer and other flexible substrates and high surface roughness and resistance value of the flexible conductive film in the existing preparation method are solved, and the preparation method 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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