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3D Printed Shape Memory Polymers Produced via Direct Pellet Extrusion †

Shape memory polymers (SMPs) are materials capable of changing their structural configuration from a fixed shape to a temporary shape, and vice versa when subjected to a thermal stimulus. The present work has investigated the 3D printing process of a shape memory polymer (SMP)-based polyurethane usi...

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Autores principales: Cersoli, Trenton, Cresanto, Alexis, Herberger, Callan, MacDonald, Eric, Cortes, Pedro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7829936/
https://www.ncbi.nlm.nih.gov/pubmed/33467774
http://dx.doi.org/10.3390/mi12010087
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author Cersoli, Trenton
Cresanto, Alexis
Herberger, Callan
MacDonald, Eric
Cortes, Pedro
author_facet Cersoli, Trenton
Cresanto, Alexis
Herberger, Callan
MacDonald, Eric
Cortes, Pedro
author_sort Cersoli, Trenton
collection PubMed
description Shape memory polymers (SMPs) are materials capable of changing their structural configuration from a fixed shape to a temporary shape, and vice versa when subjected to a thermal stimulus. The present work has investigated the 3D printing process of a shape memory polymer (SMP)-based polyurethane using a material extrusion technology. Here, SMP pellets were fed into a printing unit, and actuating coupons were manufactured. In contrast to the conventional film-casting manufacturing processes of SMPs, the use of 3D printing allows the production of complex parts for smart electronics and morphing structures. In the present work, the memory performance of the actuating structure was investigated, and their fundamental recovery and mechanical properties were characterized. The preliminary results show that the assembled structures were able to recover their original conformation following a thermal input. The printed parts were also stamped with a QR code on the surface to include an unclonable pattern for addressing counterfeit features. The stamped coupons were subjected to a deformation-recovery shape process, and it was observed that the QR code was recognized after the parts returned to their original shape. The combination of shape memory effect with authentication features allows for a new dimension of counterfeit thwarting. The 3D-printed SMP parts in this work were also combined with shape memory alloys to create a smart actuator to act as a two-way switch to control data collection of a microcontroller.
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spelling pubmed-78299362021-01-26 3D Printed Shape Memory Polymers Produced via Direct Pellet Extrusion † Cersoli, Trenton Cresanto, Alexis Herberger, Callan MacDonald, Eric Cortes, Pedro Micromachines (Basel) Article Shape memory polymers (SMPs) are materials capable of changing their structural configuration from a fixed shape to a temporary shape, and vice versa when subjected to a thermal stimulus. The present work has investigated the 3D printing process of a shape memory polymer (SMP)-based polyurethane using a material extrusion technology. Here, SMP pellets were fed into a printing unit, and actuating coupons were manufactured. In contrast to the conventional film-casting manufacturing processes of SMPs, the use of 3D printing allows the production of complex parts for smart electronics and morphing structures. In the present work, the memory performance of the actuating structure was investigated, and their fundamental recovery and mechanical properties were characterized. The preliminary results show that the assembled structures were able to recover their original conformation following a thermal input. The printed parts were also stamped with a QR code on the surface to include an unclonable pattern for addressing counterfeit features. The stamped coupons were subjected to a deformation-recovery shape process, and it was observed that the QR code was recognized after the parts returned to their original shape. The combination of shape memory effect with authentication features allows for a new dimension of counterfeit thwarting. The 3D-printed SMP parts in this work were also combined with shape memory alloys to create a smart actuator to act as a two-way switch to control data collection of a microcontroller. MDPI 2021-01-15 /pmc/articles/PMC7829936/ /pubmed/33467774 http://dx.doi.org/10.3390/mi12010087 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Cersoli, Trenton
Cresanto, Alexis
Herberger, Callan
MacDonald, Eric
Cortes, Pedro
3D Printed Shape Memory Polymers Produced via Direct Pellet Extrusion †
title 3D Printed Shape Memory Polymers Produced via Direct Pellet Extrusion †
title_full 3D Printed Shape Memory Polymers Produced via Direct Pellet Extrusion †
title_fullStr 3D Printed Shape Memory Polymers Produced via Direct Pellet Extrusion †
title_full_unstemmed 3D Printed Shape Memory Polymers Produced via Direct Pellet Extrusion †
title_short 3D Printed Shape Memory Polymers Produced via Direct Pellet Extrusion †
title_sort 3d printed shape memory polymers produced via direct pellet extrusion †
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7829936/
https://www.ncbi.nlm.nih.gov/pubmed/33467774
http://dx.doi.org/10.3390/mi12010087
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