Conductive printing ink for inkjet printing and method for preparing conductive printing ink

Abstract

The invention belongs to the field of conductive printing ink, and discloses conductive printing ink for inkjet printing. The conductive printing ink comprises 0.01-10 wt% of nanometer silver wire dispersion liquid, 0.01-5 wt% of auxiliaries, 1-10 wt% of resin, 1-5 wt% of hardening liquid and the balance solvents. The invention further discloses a method for preparing the conductive printing ink. The conductive printing ink and the method have the advantages that dispersing agents are added into the conductive printing ink, accordingly, surface tension of the conductive printing ink can be increased, the conductive printing ink can be in the shape of liquid drop during printing, printing effects can be improved, and the smoothness can be guaranteed in integral inkjet procedures owing to the low viscosity of the conductive printing ink; selected nanometer silver wires with the wire lengths of 1-20 micrometers are beneficial to preventing spray nozzles from being blocked; the hardening liquid is added into the conductive printing ink in a formula, and accordingly conductive circuits are excellent in adhesion and hardness.

Description

technical field [0001] The invention belongs to the field of conductive ink, and in particular relates to a conductive ink for inkjet printing and a preparation method thereof. Background technique [0002] The development of inkjet printing technology, which has the advantages of digitization, reduced material waste, and compatibility with different substrates, has promoted the development and application of new ink materials. Important active components of many devices can be inkjet printed, including conductive electrodes, transistors, solar cells, light-emitting diodes, batteries, and sensors. However, the development of patterned electrodes with high transparency and low resistivity remains an important challenge, especially in the field of developing highly integrated systems. Such as patent 201110167171.X, the patent mainly describes a preparation method of inkjet printing colorless transparent conductive ink, the ink is formulated from metal silver salt, solvent, ad...

AI Technical Summary

Problems solved by technology

Patent 201410472694.9, which describes the use of graphene mixed with nano-silver particles to prepare a transparent conductive ink. If graphene is used alone, the resistance of the printed circuit is relatively large, so metal particles need to be added to enhance its conductivity, but It will further reduce the transparency of the pattern, and the patent does not mention how the printed circuit pattern adheres to the substrate. If the adhesion is not good, it will inevitably affect the possibility of its large-scale application

Patent 201510296650.X describes a preparation method of anti-sedimentation and self-leveling nano-silver wire transparent conductive ink, but the ink described in this patent can only be used for full-surface coating, and subsequent etching or laser processes are required for patterning