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Water-based composite conductive paste for touch screen and its preparation method and application

A composite conductive, touch screen technology, applied in electrical digital data processing, instruments, computing and other directions, can solve the problems of high brittleness, poor touch performance, expansion and other issues

Active Publication Date: 2021-07-06
CHONGQING ZHONGGUANGDIAN DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most commonly used transparent electrode material is ITO. Its preparation process is relatively mature, but its brittleness is high. When the flexible display device is bent during use, the ITO transparent sensing electrode is prone to stress concentration and cracks and expansion. lead to poor touch performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of carbon nanotube arrays: use analytically pure methanol, ethanol, toluene, xylene and other hydrocarbon liquid phases as carbon sources and ferrocene as a catalyst, dissolve ferrocene in hydrocarbon liquid phases, and mix well with ultrasonic waves , form a yellow transparent ferrocene and hydrocarbon solution; fill the ferrocene and hydrocarbon solution into the liquid phase injector, use the quartz plate as the substrate, and add ethylenediamine to the reaction between the hydrocarbon and ferrocene It is a growth-promoting agent for carbon tube structure. It is added by filling another syringe with ethylenediamine, injecting it into the reaction area with ferrocene and hydrocarbon solutions, and then putting it into ethanol for ultrasonic cleaning. Put it into the tube furnace, seal it, feed flowing argon, raise the temperature of the tube furnace to 900 ° C at a rate of 5 ° C / min for 30 min, stop injecting reactants, close the air flow, cool down to ro...

Embodiment 2

[0028] Preparation of carbon nanotube arrays: use analytically pure methanol, ethanol, toluene, xylene and other hydrocarbon liquid phases as carbon sources and ferrocene as a catalyst, dissolve ferrocene in hydrocarbon liquid phases, and mix well with ultrasonic waves , form a yellow transparent ferrocene and hydrocarbon solution; fill the ferrocene and hydrocarbon solution into the liquid phase injector, use the quartz plate as the substrate, and add ethylenediamine to the reaction between the hydrocarbon and ferrocene It is a growth-promoting agent for carbon tube structure. It is added by filling another syringe with ethylenediamine, injecting it into the reaction area with ferrocene and hydrocarbon solutions, and then putting it into ethanol for ultrasonic cleaning. Put it into the tube furnace, seal it, feed flowing argon, raise the temperature of the tube furnace to 1000 °C at a rate of 10 °C / min and react for 30 min, stop injecting reactants, close the air flow, cool do...

Embodiment 3

[0033]Preparation of carbon nanotube arrays: use analytically pure methanol, ethanol, toluene, xylene and other hydrocarbon liquid phases as carbon sources and ferrocene as a catalyst, dissolve ferrocene in hydrocarbon liquid phases, and mix well with ultrasonic waves , form a yellow transparent ferrocene and hydrocarbon solution; fill the ferrocene and hydrocarbon solution into the liquid phase injector, use the quartz plate as the substrate, and add ethylenediamine to the reaction between the hydrocarbon and ferrocene It is a growth-promoting agent for carbon tube structure. It is added by filling another syringe with ethylenediamine, injecting it into the reaction area with ferrocene and hydrocarbon solutions, and then putting it into ethanol for ultrasonic cleaning. Put it into the tube furnace, seal it, feed flowing argon, raise the temperature of the tube furnace to 950 °C at a rate of 10 °C / min and react for 60 min, stop injecting reactants, close the air flow, cool down...

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Abstract

The invention relates to the technical field of touch screens, in particular to water-based composite conductive paste for touch screens and its preparation method and application. The water-based composite conductive paste uses 25w% isopropanol solution as a solvent and is dispersed with composite fillers. The composite fillers are copper-filled Carbon nanotube arrays and silver nanowires are composited and then coated with carbon nanotubes, wherein the mass ratio of copper to carbon nanotube arrays in the copper-filled carbon nanotube arrays is 1: (1.0-2.5); the composite conductive paste of the present invention A spraying method is used to form patterns and draw conductive lines on the base material of the touch screen, and a piezoelectric nozzle equipped with piezoelectric ceramics on the nozzle is used to spray 4 to 6 times. The invention adopts carbon nanotubes and silver nanowires with strong flexibility and high transparency, and the formed conductive circuit is fine, exhibits good stretchability and flexibility, can withstand large deformation, and is corrosion-resistant.

Description

technical field [0001] The invention relates to the technical field of touch screens, in particular to an aqueous composite conductive paste for touch screens and a preparation method and application thereof. Background technique [0002] Touch screen, also known as "touch screen" or "touch panel", is an inductive liquid crystal display device that can receive input signals such as contacts. Drive various connecting devices according to pre-programmed programs, which can be used to replace mechanical button panels, and produce vivid audio-visual effects through liquid crystal display screens. As the most simple, convenient and natural way of human-computer interaction, touch screen technology has been widely valued by the world, and is widely used in various industries. [0003] Touch screens include resistive, capacitive, optical, electromagnetic, etc. Among them, capacitive touch screens have the advantages of fast response, good reliability, high durability, and multi-to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
CPCG06F3/044G06F2203/04103
Inventor 李宪荣
Owner CHONGQING ZHONGGUANGDIAN DISPLAY TECH CO LTD