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Preparation method of nano-silver flexible conductive film

A silver flexible and conductive film technology, which is applied in the direction of equipment for manufacturing conductive/semiconductive layers, cable/conductor manufacturing, conductive layers on insulating carriers, etc., can solve the problem of easy falling off of nano silver wire layers, poor flexibility, and work Low efficiency and other problems, to achieve the effect of good chemical stability, excellent anti-corrosion performance, and stable electrical conductivity

Inactive Publication Date: 2021-04-30
TIANJIN BAOXINGWEI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In traditional technology, ITO is usually used as a transparent conductive film in optoelectronic devices, but due to its poor flexibility, it is completely unsuitable as a material for preparing flexible transparent conductive films. Nano-silver wire conductive film is currently a commonly used form of conductive film. With good electrical conductivity, light transmittance and excellent bending properties, it is the most potential material to replace ITO. The existing technology requires repeated soaking of nano-silver wires and hot-pressing processes when preparing nano-silver wire conductive films, and the process is cumbersome. , low work efficiency
And after each repeated operation, an optical interface will be formed on the joint surface, which will add up to greatly reduce the light transmittance of the conductive film.
Another method is to coat the nano-silver wire slurry on the PET substrate. The transparent conductive film formed in this way lacks surface protection, the nano-silver wire layer is easy to fall off, and the film surface is easily scratched, which affects the conductive film. quality

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0021] A preparation method of nano-silver flexible conductive film, the steps of which are:

[0022] S1 Preparation of flexible substrate layer: Melt the optical film particles required to form the substrate layer, and then use hot rollers to heat press at high temperature to form a film-like flexible substrate layer. The materials of the flexible substrate layer are PET, COP, COC , PI, PMMA or PC;

[0023] S2 coating preparation: Mix glycerin, water, polyvinyl alcohol pyrrolidone, silver nitrate, and chloride salt, then quickly heat up to 200-250°C, and keep stirring for 30-60 minutes to obtain the nano-silver wire stock solution;

[0024] S3 paint purification: Cool the obtained nano-silver wire stock solution to below 80°C, add water to dilute to obtain a nano-silver wire dilution solution, desalt and de-surfactant the diluted solution, and then concentrate to obtain a refined nano-silver wire solution, nanometer The treatment method of desalting and desurfactant of the s...

Embodiment 1

[0032] A preparation method of nano-silver flexible conductive film, the steps of which are:

[0033] S1 Preparation of flexible base material layer: melt the optical film particles required for forming the base material layer, and then use hot rollers to heat press at high temperature to form a film-like flexible base material layer, and the material of the flexible base material layer is PET;

[0034] S2 coating preparation: Mix glycerin, water, polyvinyl alcohol pyrrolidone, silver nitrate, and chloride salt, then quickly raise the temperature to 200°C, and continue stirring for 60 minutes to obtain the nano-silver wire stock solution;

[0035] S3 paint purification: Cool the obtained nano-silver wire stock solution to 75°C, add water to dilute to obtain a nano-silver wire diluent, desalt and remove surfactant from the diluent, and then concentrate to obtain a refined nano-silver wire solution, nano-silver The treatment method of desalting and desurfactant of line diluent i...

Embodiment 2

[0042] A preparation method of nano-silver flexible conductive film, the steps of which are:

[0043] S1 Preparation of flexible base material layer: Melt the optical film particles required for forming the base material layer, and then use a hot roller to heat press at high temperature to form a film-like flexible base material layer, and the material of the flexible base material layer is PMMA;

[0044] S2 coating preparation: Mix glycerin, water, polyvinyl alcohol pyrrolidone, silver nitrate, and chloride salt, then quickly raise the temperature to 250°C, and continue stirring for 30 minutes to obtain the nano-silver wire stock solution;

[0045] S3 paint purification: Cool the obtained nano-silver wire stock solution to below 60°C, add water to dilute to obtain a nano-silver wire dilution, desalt and de-surfactant the diluted liquid, and then concentrate to obtain a refined nano-silver wire solution, nano The treatment method of desalting and desurfactant of the silver lin...

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PUM

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Abstract

The invention discloses a preparation method of a nano-silver flexible conductive film. The preparation method comprises the following steps: S1, preparing a flexible substrate layer; S2, preparing a coating; S3, purifying the coating; S4, mixing glue and a silver wire; S5, coating a base material; S5, stretching the flexible base material; S6, performing coating; and S7, performing drying. The nano-silver flexible conductive film disclosed by the invention has the characteristics of stable conductive performance of the film-forming surface, low resistivity, high light transmittance and strong adhesive force, and the prepared nano-silver flexible conductive film also has the characteristics of good chemical stability and excellent corrosion resistance, and can be applied to the fields of electromagnetic shielding, static electricity resistance, electronic circuits and the like.

Description

technical field [0001] The invention relates to the technical field of conductive film production, in particular to a method for preparing a nano-silver flexible conductive film. Background technique [0002] Transparent conductive film is a thin film with conductive function. Transparent conductive film is widely used in liquid crystal displays, solar cells, microelectronics ITO conductive film glass, optoelectronics and various optical field. In traditional technology, ITO is usually used as a transparent conductive film in optoelectronic devices, but due to its poor flexibility, it is completely unsuitable as a material for preparing flexible transparent conductive films. Nano-silver wire conductive film is currently a commonly used form of conductive film. With good electrical conductivity, light transmittance and excellent bending properties, it is the most potential material to replace ITO. The existing technology requires repeated soaking of nano-silver wires and hot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B13/30H01B5/14
CPCH01B13/0026H01B13/30H01B5/14
Inventor 司荣美鲍彦广潘中海
Owner TIANJIN BAOXINGWEI TECH
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