Preparation method and application of conductive ink based on metal nanowire and graphene oxide

Abstract

The invention provides a preparation method and application of conductive ink based on metal nanowire and graphene oxide. The graphene oxide is simultaneously used as a dispersing agent, a thickening agent and a stabilizing agent. The metal nanowire, the graphene oxide, the deionized water, the alcohol solvent, the dispersing agent, the surface active agent, the flatting agent and the de-foaming agent are uniformly mixed at a certain mass ratio, so as to acquire the conductive ink product. The acquired ink can be directly written or printed on various substrate materials so as to construct a conductive circuit with high conductivity, stability, flexibility and high adhesion; the constructed conductive circuit is dried for 3-10 minutes under room temperature, so that ultrahigh conductivity is achieved; furthermore, the graphene oxide is reduced and the metal nanowire is sintered according to the methods, such as, selecting sintering temperature at 50-200 DEG C or performing chemical reduction under room temperature or utilizing an xenon flashlight to sinter, so that the conductivity of the conductive circuit is further increased.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, conductive inks and printed electronic products, in particular to a method for preparing a water-based conductive ink based on metal nanowires and graphene oxide that can be directly written and printed, and the construction of a conductive circuit based on the ink The method is mainly used in the construction of flexible and foldable electronic circuits and devices, the lead wire of the circuit and the repair circuit, etc. Background technique [0002] In recent years, electronic products are becoming more and more miniaturized, flexible, and wearable. The light weight and integration of new electronic devices also put forward higher requirements for the preparation process of the device: low cost, environmental protection and pollution-free, recyclable, simple preparation, short production cycle, and large-scale production. Photolithography is the most commonly used method for preparing ...

AI Technical Summary

Problems solved by technology

At present, most of the conductive components in conductive inks are metal nanoparticles or micro-sheets. For example, Chinese patent document CN101710497 B discloses a nano-silver conductive paste dispersed in cellulose, which is obtained by coating it by printing or other methods. The conductive pattern, after sintering at 250 °C, the resistivity is 10 -5 Ω·cm order of magnitude, but the silver solid content in the ink is relatively high, which is 10%-70%, and the required sintering temperature is high; Chinese patent document CN104817891 A discloses a preparation method of a conductive ink that can be directly written Silver nanoparticles coated with anionic surfactants are dispersed in additives such as ethyl cellulose to obtain conductive inks. The solid content of silver nanoparticles is 5%-60%, and the sintering temperature is low, but it takes a long time for sintering, and The conductivity of the written conductive line is not ideal after drying, and the resistance value of 1cm is at the level of hundreds of ohms

This type of metal nanoparticle and microsheet ink often requires more than 50% metal solid content to obtain ideal conductivity, and requires a high sintering temperature in the later stage, and the conductive layer is prone to breakage when bent, making it difficult to achieve wearable flexibility. Circuit requirements for foldability, bending, etc.

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