High-conductivity hydrographene conductive ink as well as preparation method and composition thereof

Abstract

The invention relates to high-conductivity hydrographene conductive ink as well as a preparation method and a composition thereof. The composition of the high-conductivity hydrographene conductive inkis prepared from the following components in parts by mass: 20 to 30 parts of a conductive unit, 15 to 30 parts of a coupling agent, 0.1 to 20 parts of an adjuvant and 50 to 100 parts of water. By the adoption of the composition and the preparation method which are provided by the invention, the sheet resistivity of the prepared high-conductivity hydrographene conductive ink is less than or equalto 20 ohms / square, and the conductive unit content is less than or equal to 30 percent, and the high-conductivity hydrographene conductive ink has the advantages of low conductive unit content, highmechanical property and high conductivity. Meanwhile, water is used as a solvent, so that the high-conductivity hydrographene conductive ink has outstanding environmental protection and safety characteristics of greenness, environmental friendliness, non-toxicity, harmlessness, incombustibility, non-explosivity and the like.

Description

technical field [0001] The invention relates to the field of conductive inks, in particular to a highly conductive water-based graphene conductive ink, a preparation method and a composition thereof. Background technique [0002] Conductive ink is a composite conductive polymer material formed by adding conductive filler powder, such as carbon black, graphite, silver, copper, etc., to polymer materials. It is widely used in printed circuit boards, membrane switches, REID radio frequency Identification, printed resistors, etc. According to the different properties of conductive fillers, conductive inks can be divided into gold-based conductive inks, silver-based conductive inks, copper-based conductive inks, and carbon-based conductive inks. Gold-based conductive inks have excellent comprehensive performance, but they are expensive and their application range is limited Products with special requirements such as thick film integrated circuits. The conductivity of silver-bas...

AI Technical Summary

Problems solved by technology

[0004] At present, the research and development of conductive inks are mainly concentrated on solvent-based inks. The main measure to improve the conductivity of inks is to increase the content of conductive agents, generally reaching 30-95%. Although this can greatly improve the conductivity of inks, However, in the actual use process, due to the high content of conductive agent, the construction performance, appearance quality and service stability of the coating film are poor, the flexibility and adhesion of the coating film are poor, and micro-cracks and peeling are prone to occur. Moreover, solvent-based inks contain a large amount of toxic and harmful volatile organic compounds, which seriously affect human health and environmental pollution.