A kind of water-based graphene conductive paste and its preparation method and RFID tag

Abstract

The application provides a water-based graphene conductive paste, comprising the following components in parts by weight: 10-15 parts of graphene, 40-60 parts of deionized water, 1-3 parts of surfactant, and 5-8 parts of gelling agent part, 30-35 parts of binder, 0.5-2 parts of photocuring agent and 1-5 parts of auxiliary agent, and the surfactant is selected from tea saponin, cyclolipopeptide salt, lignin sulfonate, dodecane One or more in base benzene sulfonate; Described gelling agent is selected from one or more in alginate, cellulose, polyvinyl alcohol, xanthan gum, agar powder. The water-based graphene conductive paste provided by the application is dispersed in deionized water in the presence of a specific surfactant, and then supplemented with a specific binder, photocuring agent and auxiliary agent, and is finally formed under the action of a gelling agent. The water-based conductive paste is made in the form of hydrogel to maintain the dispersed state of graphene and significantly improve the stability. It can effectively resist calendering deformation in gravure printing, and the bonding effect and wear-resistant effect have also been effectively improved. It has better printing adaptability.

Description

technical field [0001] The present application relates to the technical field of graphene, in particular to a water-based graphene conductive paste, a preparation method thereof, and an RFID tag. Background technique [0002] At present, some foreign manufacturers of radio frequency identification technology RFID have restarted the key technology and industrialization research of printing RFID electronic tags with graphene paste, such as the British BGTM company. However, due to the completely different appearance and conductive properties of graphene from traditional conductive filler silver powder, the formula and process of graphene-based conductive paste are also completely different. Moreover, the conductive paste based on graphene has the problems of difficult dispersion, easy agglomeration, and poor printing adaptability in actual production. [0003] First of all, in order to meet environmental protection standards, printing pastes are more inclined to choose water-...

AI Technical Summary

Problems solved by technology

However, it is found in actual production that when the existing commercial graphene conductive paste is attached to the substrate by the gravure printing method, the fluidity is too strong, the adhesion after curing is poor, and cracks, curling, etc. are prone to occur. Defects; at the same time, the outline of the ink layer is prone to deformation after roller calendering, which affects the sensitivity and yield of RFID

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