Journal article 917 views 210 downloads
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
,
David Gethin ,
Julien Bras,
Aurore Denneulin
Journal of Materials Science, Volume: 56, Issue: 21, Pages: 12524 - 12538
Swansea University Authors:
Davide Deganello , David Gethin
-
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DOI (Published version): 10.1007/s10853-021-06082-y
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...
| Published in: | Journal of Materials Science |
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| ISSN: | 0022-2461 1573-4803 |
| Published: |
Springer Science and Business Media LLC
2021
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| Online Access: |
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| 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. |
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| College: |
Faculty of Science and Engineering |
| Issue: |
21 |
| Start Page: |
12524 |
| End Page: |
12538 |