Conductive graphene printing ink and preparation method thereof

Abstract

The invention provides a conductive graphene printing ink. The conductive graphene printing ink is composed of 0.001-80wt% of graphene, 1-60wt% of a linking material, 0.1-30wt% of an assistant, and the balance solvent. The invention also provides a preparation method of the conductive graphene printing ink. The conductive graphene printing ink has the advantages of good toughness, good die molding performance, good adhesion and good impact resistance; chemically doped graphene and chemically modified graphene in the graphene have good conductive, mechanical and thermal performances. The molecules of the chemically doped graphene comprise one or more of polyaniline, polyacetylene, polythiophene, polyparaphenylene and polypyrrole, and the functional groups of the chemically modified graphene comprise one or more of an anilino group, a pyrryl group, an imidazolyl group, a benzenesulfonic acid group, a thienyl group, a furyl group, a phenyl group, a hydroxy group, an ester group and derivative groups thereof, so the conductive performance, the mechanical performances and the dispersion stability of graphene in the printing ink are improved.

Description

technical field [0001] The invention relates to the technical field of electronic material printing, in particular to a graphene conductive ink and a preparation method thereof. Background technique [0002] Graphene is a new material with a single-layer sheet structure of carbon atoms. Since the successful isolation of graphene by physicists Andre Heim and Konstantin Novoselov of the University of Manchester in 2004, the physical and chemical properties of graphene and its application have become a research hotspot. . It is reported that the thickness of graphene is only 0.34 nanometers, and the conduction rate of electrons in graphene is 8×10 5 m / s; electrical conductivity 1250~7000s / m; thermal properties of graphene are stable and thermal conductivity is 3080~5150W / mK. Graphene has superhard mechanical strength, reaching 110-130 GPa, and has a large specific surface area (2630m / g). The special structure of graphene makes it have excellent performance, low cost, effect...

AI Technical Summary

Problems solved by technology

Traditional conductive inks are composed of gold, silver, copper powder or other metal powders or carbon powders and binders, which have disadvantages such as high cost, complicated process, high resistivity, and high molding and curing temperature. With the development of electronic products and equipment Developing in the direction of light, thin, small, low cost, multi-functional, high reliability, etc., the amount of flexible circuits is increasing, using conductive ink or conductive ink to form conductive lines on flexible insulating substrates by printing or printing attracted widespread attention