Correlation between the rheology of electronic inks and the droplet size generated from a capillary nozzle in dripping regime
Tipo
Artigo
Data de publicação
2023
Periódico
Physics of Fluids
Citações (Scopus)
7
Autores
Rijo P.C.
Cremonezzi J.M.O.
Andrade R.J.E.
Galindo-Rosales F.J.
Cremonezzi J.M.O.
Andrade R.J.E.
Galindo-Rosales F.J.
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Resumo
© 2023 Author(s).This study provides a complete rheological characterization of bidimensional (2D) nanomaterial dispersions, employed as 2D-inks precursors in printed electronics. Three different 2D nanomaterials [molybdenum disulfide (MoS2), graphene, and hexagonal boron nitride (hBN)] were dispersed in a Newtonian fluid (toluene) and a viscoelastic fluid (toluene + ethyl cellulose) with different polymer concentrations. The presence of nanosheets does not change the shear rheology of the carrier fluid. Regarding the extensional rheology, the results showed that the pinch-off phenomenon is present in all toluene suspensions; however, the presence of the ethyl cellulose introduces elasticity in the system, even leading to the formation of beads-on-a-string, and the relaxation times of the suspensions depend on the kind of nanosheets present in the fluid. As controlling the droplet size when dispensing 2D-inks is of paramount importance for printed electronics as well as for many other applications, here it is presented a correlation between the rheological properties of these 2D-inks precursors and their droplet size when generated from a capillary nozzle in the dripping regime.
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Assuntos Scopus
2D nanomaterial , Capillary nozzle , Dripping regimes , Droplets sizes , Electronic ink , Ethyl cellulose , Newtonian fluids , Printed electronics , Rheological characterization , Visco-elastic fluid