Method for producing high-transmittance transparent and conductive nano-silver wire film

Abstract

The invention discloses a method for producing a high-transmittance transparent and conductive nano-silver wire film. The method comprises the following steps: S1, performing hydrophilic modificationtreatment on the surface of a high-transmittance PET substrate; and S2, uniformly coating the modified surface of the high-transmittance PET with a conductive nano-silver wire coating solution by using a scraper rod, and drying the coated high-transmittance PET to obtain the high-transmittance film with a conductive coating, wherein the conductive nano-silver wire coating solution mainly comprisesepoxy resin, a curing agent, sulfhydryl silica gel, nano-silver wires and an organic solvent, the solid content of the conductive nano-silver wire coating solution is 10-5%, the weight percentage ofthe nano-silver wires in the conductive nano-wire coating solution is 0.05-0.4%, and the weight percentage of the sulfhydryl silica gel in the conductive nano-silver wire coating solution is 0.5-4%. Asmall amount of the sulfhydryl silica gel is added to an epoxy resin solution, the coordination effect of the sulfhydryl silica gel and the silver wires is utilized to improve the dispersibility of the nano-silver wires in the solution, and the obtained conductive film product has high light transmittance, low haze and good adhesion.

Description

technical field [0001] The invention relates to the technical field of conductive thin films, in particular to a method for preparing a transparent conductive thin film with high transparency nano-silver wires. Background technique [0002] Nano-silver wire conductive film is a film formed by coating nano-silver wire as a conductive medium, coating a dispersion containing nano-silver wire on a transparent substrate such as PET, and drying it. In the traditional process, the dispersion liquid is directly applied to the PET surface, and the obtained silver nano wire layer is easy to separate and peel off, that is, the silver nano wire layer and the transparent film substrate are easy to delaminate. The improved technical solution improves the adhesion of the nano-silver wire layer through further selection of PET surface modification and dispersion resin materials, as described in Chinese patents 201510296650.X, 201610753137.3, and 201610753188.6. [0003] The dispersion comp...

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Problems solved by technology

However, this method needs to strictly control the output power of the laser source. For different batches of PET, the laser frequency needs to be adjusted accordingly, otherwise the mechanical strength of the PET film as the substrate will be damaged.

201610753188 .6 Use low-temperature argon / oxygen mixed plasma technology to carry out hydrophilic modification on the PET substrate. This solution can improve the interlayer adhesion to a certain extent. However, plasma treatment currently only exists in experimental equipment and cannot be scaled up. applied in actual production