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Synthesis of Polyamide-Based Microcapsules via Interfacial Polymerization: Effect of Key Process Parameters

Polyamide microcapsules have gathered significant research interest during the past years due to their good barrier properties; however, the potential of their application is limited due to the fragility of the polymeric membrane. Fully aliphatic polyamide microcapsules (PA MCs) were herein prepared...

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Autores principales: Mytara, Angeliki D., Chronaki, Konstantina, Nikitakos, Vasilis, Papaspyrides, Constantine D., Beltsios, Konstantinos, Vouyiouka, Stamatina
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8510004/
https://www.ncbi.nlm.nih.gov/pubmed/34640292
http://dx.doi.org/10.3390/ma14195895
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author Mytara, Angeliki D.
Chronaki, Konstantina
Nikitakos, Vasilis
Papaspyrides, Constantine D.
Beltsios, Konstantinos
Vouyiouka, Stamatina
author_facet Mytara, Angeliki D.
Chronaki, Konstantina
Nikitakos, Vasilis
Papaspyrides, Constantine D.
Beltsios, Konstantinos
Vouyiouka, Stamatina
author_sort Mytara, Angeliki D.
collection PubMed
description Polyamide microcapsules have gathered significant research interest during the past years due to their good barrier properties; however, the potential of their application is limited due to the fragility of the polymeric membrane. Fully aliphatic polyamide microcapsules (PA MCs) were herein prepared from ethylene diamine and sebacoyl chloride via interfacial polymerization, and the effect of key encapsulation parameters, i.e., monomers ratio, core solvent, stirring rate and time during the polymerization step, were examined concerning attainable process yield and microcapsule properties (shell molecular weight and thermal properties, MC size and morphology). The process yield was found to be mainly influenced by the nature of the organic solvent, which was correlated to the diffusion potential of the diamine from the aqueous phase to the organic core through the polyamide membrane. Thus, spherical microcapsules with a size between 14 and 90 μm and a yield of 33% were prepared by using toluene as core solvent. Milder stirring during the polymerization step led to an improved microcapsule morphology; yet, the substantial improvement of mechanical properties remains a challenge.
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spelling pubmed-85100042021-10-13 Synthesis of Polyamide-Based Microcapsules via Interfacial Polymerization: Effect of Key Process Parameters Mytara, Angeliki D. Chronaki, Konstantina Nikitakos, Vasilis Papaspyrides, Constantine D. Beltsios, Konstantinos Vouyiouka, Stamatina Materials (Basel) Article Polyamide microcapsules have gathered significant research interest during the past years due to their good barrier properties; however, the potential of their application is limited due to the fragility of the polymeric membrane. Fully aliphatic polyamide microcapsules (PA MCs) were herein prepared from ethylene diamine and sebacoyl chloride via interfacial polymerization, and the effect of key encapsulation parameters, i.e., monomers ratio, core solvent, stirring rate and time during the polymerization step, were examined concerning attainable process yield and microcapsule properties (shell molecular weight and thermal properties, MC size and morphology). The process yield was found to be mainly influenced by the nature of the organic solvent, which was correlated to the diffusion potential of the diamine from the aqueous phase to the organic core through the polyamide membrane. Thus, spherical microcapsules with a size between 14 and 90 μm and a yield of 33% were prepared by using toluene as core solvent. Milder stirring during the polymerization step led to an improved microcapsule morphology; yet, the substantial improvement of mechanical properties remains a challenge. MDPI 2021-10-08 /pmc/articles/PMC8510004/ /pubmed/34640292 http://dx.doi.org/10.3390/ma14195895 Text en © 2021 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
Mytara, Angeliki D.
Chronaki, Konstantina
Nikitakos, Vasilis
Papaspyrides, Constantine D.
Beltsios, Konstantinos
Vouyiouka, Stamatina
Synthesis of Polyamide-Based Microcapsules via Interfacial Polymerization: Effect of Key Process Parameters
title Synthesis of Polyamide-Based Microcapsules via Interfacial Polymerization: Effect of Key Process Parameters
title_full Synthesis of Polyamide-Based Microcapsules via Interfacial Polymerization: Effect of Key Process Parameters
title_fullStr Synthesis of Polyamide-Based Microcapsules via Interfacial Polymerization: Effect of Key Process Parameters
title_full_unstemmed Synthesis of Polyamide-Based Microcapsules via Interfacial Polymerization: Effect of Key Process Parameters
title_short Synthesis of Polyamide-Based Microcapsules via Interfacial Polymerization: Effect of Key Process Parameters
title_sort synthesis of polyamide-based microcapsules via interfacial polymerization: effect of key process parameters
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8510004/
https://www.ncbi.nlm.nih.gov/pubmed/34640292
http://dx.doi.org/10.3390/ma14195895
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