Cargando…

Effect of the Addition of MgO Nanoparticles on the Thermally-Activated Shape Memory Behavior of Plasticized PLA Electrospun Fibers

In this work, the thermally-activated shape memory behavior of poly(lactic acid)-based electrospun fibers (PLA-based efibers) reinforced with different amounts of magnesium oxide (MgO) nanoparticles (NPs) was studied at different temperatures. In particular, MgO NPs were added at different concentra...

Descripción completa

Detalles Bibliográficos
Autores principales: Leonés, Adrián, Peponi, Laura, Fiori, Stefano, Lieblich, Marcela
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9268919/
https://www.ncbi.nlm.nih.gov/pubmed/35808702
http://dx.doi.org/10.3390/polym14132657
_version_ 1784744104992702464
author Leonés, Adrián
Peponi, Laura
Fiori, Stefano
Lieblich, Marcela
author_facet Leonés, Adrián
Peponi, Laura
Fiori, Stefano
Lieblich, Marcela
author_sort Leonés, Adrián
collection PubMed
description In this work, the thermally-activated shape memory behavior of poly(lactic acid)-based electrospun fibers (PLA-based efibers) reinforced with different amounts of magnesium oxide (MgO) nanoparticles (NPs) was studied at different temperatures. In particular, MgO NPs were added at different concentrations, such as 0.1, 0.5, 1 and 3 wt%, with respect to the PLA matrix. The glass-transition temperature of PLA-based efibers was modulated by adding a 20 wt% of oligomer lactic acid as plasticizer. Once the plasticized PLA-based efibers were obtained and basically characterized in term of morphology as well as thermal and mechanical properties, thermo-mechanical cycles were carried out at 60 °C and 45 °C in order to study their thermally-activated shape memory response, demonstrating that their crystalline nature strongly affects their shape memory behavior. Importantly, we found that the plastificant effect in the mechanical response of the reinforced plasticized PLA efibers is balanced with the reinforcing effect of the MgO NPs, obtaining the same mechanical response of neat PLA fibers. Finally, both the strain recovery and strain fixity ratios of each of the plasticized PLA-based efibers were calculated, obtaining excellent thermally-activated shape memory response at 45 °C, demonstrating that 1 wt% MgO nanoparticles was the best concentration for the plasticized system.
format Online
Article
Text
id pubmed-9268919
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-92689192022-07-09 Effect of the Addition of MgO Nanoparticles on the Thermally-Activated Shape Memory Behavior of Plasticized PLA Electrospun Fibers Leonés, Adrián Peponi, Laura Fiori, Stefano Lieblich, Marcela Polymers (Basel) Article In this work, the thermally-activated shape memory behavior of poly(lactic acid)-based electrospun fibers (PLA-based efibers) reinforced with different amounts of magnesium oxide (MgO) nanoparticles (NPs) was studied at different temperatures. In particular, MgO NPs were added at different concentrations, such as 0.1, 0.5, 1 and 3 wt%, with respect to the PLA matrix. The glass-transition temperature of PLA-based efibers was modulated by adding a 20 wt% of oligomer lactic acid as plasticizer. Once the plasticized PLA-based efibers were obtained and basically characterized in term of morphology as well as thermal and mechanical properties, thermo-mechanical cycles were carried out at 60 °C and 45 °C in order to study their thermally-activated shape memory response, demonstrating that their crystalline nature strongly affects their shape memory behavior. Importantly, we found that the plastificant effect in the mechanical response of the reinforced plasticized PLA efibers is balanced with the reinforcing effect of the MgO NPs, obtaining the same mechanical response of neat PLA fibers. Finally, both the strain recovery and strain fixity ratios of each of the plasticized PLA-based efibers were calculated, obtaining excellent thermally-activated shape memory response at 45 °C, demonstrating that 1 wt% MgO nanoparticles was the best concentration for the plasticized system. MDPI 2022-06-29 /pmc/articles/PMC9268919/ /pubmed/35808702 http://dx.doi.org/10.3390/polym14132657 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Leonés, Adrián
Peponi, Laura
Fiori, Stefano
Lieblich, Marcela
Effect of the Addition of MgO Nanoparticles on the Thermally-Activated Shape Memory Behavior of Plasticized PLA Electrospun Fibers
title Effect of the Addition of MgO Nanoparticles on the Thermally-Activated Shape Memory Behavior of Plasticized PLA Electrospun Fibers
title_full Effect of the Addition of MgO Nanoparticles on the Thermally-Activated Shape Memory Behavior of Plasticized PLA Electrospun Fibers
title_fullStr Effect of the Addition of MgO Nanoparticles on the Thermally-Activated Shape Memory Behavior of Plasticized PLA Electrospun Fibers
title_full_unstemmed Effect of the Addition of MgO Nanoparticles on the Thermally-Activated Shape Memory Behavior of Plasticized PLA Electrospun Fibers
title_short Effect of the Addition of MgO Nanoparticles on the Thermally-Activated Shape Memory Behavior of Plasticized PLA Electrospun Fibers
title_sort effect of the addition of mgo nanoparticles on the thermally-activated shape memory behavior of plasticized pla electrospun fibers
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9268919/
https://www.ncbi.nlm.nih.gov/pubmed/35808702
http://dx.doi.org/10.3390/polym14132657
work_keys_str_mv AT leonesadrian effectoftheadditionofmgonanoparticlesonthethermallyactivatedshapememorybehaviorofplasticizedplaelectrospunfibers
AT peponilaura effectoftheadditionofmgonanoparticlesonthethermallyactivatedshapememorybehaviorofplasticizedplaelectrospunfibers
AT fioristefano effectoftheadditionofmgonanoparticlesonthethermallyactivatedshapememorybehaviorofplasticizedplaelectrospunfibers
AT lieblichmarcela effectoftheadditionofmgonanoparticlesonthethermallyactivatedshapememorybehaviorofplasticizedplaelectrospunfibers