Correlation between the rheology of 2D-inks precursors and the droplet size generated from a capillary nozzle in dripping regime

This study provides a complete rheological characterization of 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)...

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Bibliographic Details
Published in:arXiv.org 2023-06
Main Authors: Rijo, Pedro C, Josué M O Cremonezzi, Andrade, Ricardo J E, Galindo-Rosales, Francisco J
Format: Article
Language:English
Subjects:
Boron nitride
Cellulose
Droplets
Electronics
Ethyl cellulose
Graphene
Inks
Molybdenum disulfide
Nanomaterials
Nanoparticles
Newtonian fluids
Nozzles
Precursors
Rheological properties
Rheology
Toluene
Viscoelastic fluids
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Summary:This study provides a complete rheological characterization of 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 nanoparticles 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 depends on the kind of nanoparticles 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 dripping regime.
ISSN:2331-8422
DOI:10.48550/arxiv.2306.16814