Fabrication of Transparent Conductive Film Using Water-Based Nano-Silver Gravure Ink

Abstract

In this article, three parts of work have been done. First, silver nano-particle dispersion had been obtained by liquid chemical reduction method with Ag+ concentration as 2.7mol/l and UV-vis, SEM were used to characterize the silver nano-particles. Then, the dispersion was purified by solvent deposit method for three times with acetone acting as the deposit agent and water-based gravure ink was obtained after adding water, resin, and other additives. The silver content and viscosity of the ink were measured by TG and rheometer. Finally, the ink was used to fabricate transparent conductive film (TCF) with PET as the substrate. The transmissivity, adhesion, conductivity, and the edge sharpness were measured. The results show that ration of silver nanoplates in the dispersion synthesized can reach to 70%. From TG curve, the silver content of the ink is wt. 49%. Viscosity of the gravure ink is 129mPa•s. The transmissivity of the film is around 80% and the calculated resistivity is 1.53×10-4Ω.cm.

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“…As research shows, the presence of agglomerates makes silver ink based electro-textiles inconsistent in its properties [16,17]. To obtain an agglomerate-free, highly dispersed silver solution, it is necessary to moderate their coagulation during the synthesis process, by adding a protective coating on the silver [18][19][20][21]. This method produces silver particle ink with a particle size ranging from 50 to 100 nm at a silver content of 49% [20].…”

“…To obtain an agglomerate-free, highly dispersed silver solution, it is necessary to moderate their coagulation during the synthesis process, by adding a protective coating on the silver [18][19][20][21]. This method produces silver particle ink with a particle size ranging from 50 to 100 nm at a silver content of 49% [20]. As observed during the research, adding an appropriate amount of a suitable acrylic resin in the process could solve the problem of the formation of agglomerates.…”