TY - JOUR
T1 - Impact of surface functionalization by nanostructured silver thin films on thermoplastic central venous catheters: Mechanical, microscopical and thermal analyses
AU - Marchiori, Gregorio
AU - Gambardella, Alessandro
AU - Berni, Matteo
AU - Bellucci, Devis
AU - Cassiolas, Giorgio
AU - Cannillo, Valeria
N1 - Funding Information:
Funding: This research was funded by POR-FESR 2014–2020 project: “NANOCOATINGS–Nuovi film antibatterici nanostrutturati per applicazioni in campo biomedicale”.
Publisher Copyright:
© 2020 by the authors. Licensee MDPI, Basel, Switzerland.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/11
Y1 - 2020/11
N2 - In this work, an interdisciplinary approach was employed to investigate the impact on thermoplastic catheters from the deposition of a thin (180 nm), metallic silver film by a pulsed ablation technique. Our characterization firstly involved tensile and bending tests, each one accompanied by finite element modeling aiming to elucidate the contributions resulting from bulk and coating to the device’s mechanical behavior. The morphological assessment of the surface before and after the deposition was performed by atomic force microscopy, specifically implemented to visualize the nanostructured character of the film surface and the extent to which the polymer was modified by the deposition process, focusing on coating delamination due to tensile stress. Finally, thermogravimetric–differential thermal analysis was carried out to evaluate whether silver deposition has affected the physiochemical structure of the polymer matrix. Our results establish that the deposition does not significantly alter the physical and chemical properties of the device. The presented characterization sets a useful precedent for elucidating how structural properties of polymeric materials may change after coating by electronic ablation techniques, highlighting the importance of employing a comprehensive approach for clarifying the effects of additive manufacturing on medical devices.
AB - In this work, an interdisciplinary approach was employed to investigate the impact on thermoplastic catheters from the deposition of a thin (180 nm), metallic silver film by a pulsed ablation technique. Our characterization firstly involved tensile and bending tests, each one accompanied by finite element modeling aiming to elucidate the contributions resulting from bulk and coating to the device’s mechanical behavior. The morphological assessment of the surface before and after the deposition was performed by atomic force microscopy, specifically implemented to visualize the nanostructured character of the film surface and the extent to which the polymer was modified by the deposition process, focusing on coating delamination due to tensile stress. Finally, thermogravimetric–differential thermal analysis was carried out to evaluate whether silver deposition has affected the physiochemical structure of the polymer matrix. Our results establish that the deposition does not significantly alter the physical and chemical properties of the device. The presented characterization sets a useful precedent for elucidating how structural properties of polymeric materials may change after coating by electronic ablation techniques, highlighting the importance of employing a comprehensive approach for clarifying the effects of additive manufacturing on medical devices.
KW - Atomic force microscopy
KW - Central venous catheter
KW - Finite element modeling
KW - Mechanical testing
KW - Medical device
KW - Nanostructured coating
KW - Pulsed electron deposition
KW - TG-DTA
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U2 - 10.3390/coatings10111034
DO - 10.3390/coatings10111034
M3 - Article
AN - SCOPUS:85094637185
VL - 10
SP - 1
EP - 14
JO - Coatings
JF - Coatings
SN - 2079-6412
IS - 11
M1 - 1034
ER -