Water-based graphene conductive paste, preparation method thereof and RFID tag

Abstract

The invention provides water-based graphene conductive paste which comprises the following components in parts by weight: 10-15 parts of graphene, 40-60 parts of deionized water, 1-3 parts of a surfactant, 5-8 parts of gel, 30-35 parts of a binding material, 0.5-2 parts of a light curing agent and 1-5 parts of an aid, wherein the surfactant is selected from one or more of tea saponin, cyclic lipopeptide salt, lignosulfonate and dodecylbenzene sulfonate; and the gel is selected from one or more of alginate, cellulose, polyvinyl alcohol, xanthan gum and agar powder. According to the water-basedgraphene conductive paste provided by the invention, the water-based graphene conductive paste is finally prepared in the form of hydrogel under the action of the gel by dispersing the water-based graphene conductive paste into the deionized water in the presence of the specific surfactant and supplementing the specific binding material, the light curing agent and the auxiliary agent, so that thedispersion form of graphene is maintained, and the stability is remarkably improved; and in intaglio printing, calendering deformation can be effectively resisted, the bonding effect and the wear-resisting effect are effectively improved, and better printing adaptability is achieved.

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

Images