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Rheology of cellulose nanofibrils and silver nanowires for the development of screen-printed antibacterial surfaces / Hugo Spieser, Alexandre Jardin, Davide Deganello, David Gethin, Julien Bras, Aurore Denneulin

Journal of Materials Science, Volume: 56, Issue: 21, Pages: 12524 - 12538

Swansea University Authors: Davide Deganello, David Gethin

  • Accepted Manuscript under embargo until: 19th April 2022

Abstract

TEMPO (2,2,6,6-tetramethylpiperidine-N-oxyl)-oxidized cellulose nanofibrils (T-CNF) and silver nanowires (Ag NWs) were formulated as active inks. Their rheological properties were investigated to design optimal conditions for processing by the screen-printing process, with the aim of preparing antib...

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Published in: Journal of Materials Science
ISSN: 0022-2461 1573-4803
Published: Springer Science and Business Media LLC 2021
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa56873
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Abstract: TEMPO (2,2,6,6-tetramethylpiperidine-N-oxyl)-oxidized cellulose nanofibrils (T-CNF) and silver nanowires (Ag NWs) were formulated as active inks. Their rheological properties were investigated to design optimal conditions for processing by the screen-printing process, with the aim of preparing antibacterial patterns. Rheological experiments mimicking the screen-printing process were applied to different ink formulations to investigate their thixotropic and viscosity properties. The experiments conducted at 1wt% total mass content and different ratios of T-CNF/Ag NWs showed that the recovery (%), the recovery time and the viscosity are formulation dependent. A ratio 2:1 (T-CNF/Ag NWs) and total mass content of 2.5wt% were then selected to prepare an ink suitable for screen printing. Printing defects were corrected by addition of water-soluble polymer hydroxypropyl methylcellulose (HPMC). The selected formulation printed on flexible polyethylene terephthalate (PET) substrate displayed a 67.4% antibacterial activity against E. coli in a standard contact active test, with a transparency superior to 70%, proving the promising features of the developed solution for active packaging applications.
College: College of Engineering
Issue: 21
Start Page: 12524
End Page: 12538