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A Phenomenological Approach to Study Mechanical Properties of Polymeric Porous Structures Processed Using Supercritical CO(2)

This work proposes a modeling of the mechanical properties of porous polymers processed by scCO(2), using a phenomenological approach. Tensile and compression tests of alginate/gelatin and cellulose acetate/graphene oxide were modeled using three hyperelastic equations, derived from strain energy fu...

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Detalles Bibliográficos
Autores principales: Tabernero, Antonio, Baldino, Lucia, Cardea, Stefano, Martín del Valle, Eva, Reverchon, Ernesto
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6473646/
https://www.ncbi.nlm.nih.gov/pubmed/30960469
http://dx.doi.org/10.3390/polym11030485
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author Tabernero, Antonio
Baldino, Lucia
Cardea, Stefano
Martín del Valle, Eva
Reverchon, Ernesto
author_facet Tabernero, Antonio
Baldino, Lucia
Cardea, Stefano
Martín del Valle, Eva
Reverchon, Ernesto
author_sort Tabernero, Antonio
collection PubMed
description This work proposes a modeling of the mechanical properties of porous polymers processed by scCO(2), using a phenomenological approach. Tensile and compression tests of alginate/gelatin and cellulose acetate/graphene oxide were modeled using three hyperelastic equations, derived from strain energy functions. The proposed hyperelastic equations provide a fair good fit for mechanical behavior of the nanofibrous system alginate/gelatin (deviations lower than 10%); whereas, due to the presence of the solid in the polymer network, a four-parameter model must be used to fit the composite cellulose acetate/graphene oxide behavior. Larger deviations from the experimental data were observed for the system cellulose acetate/graphene oxide because of its microporous structure. A finite element method was, then, proposed to model both systems; it allowed a realistic description of observable displacements and effective stresses. The results indicate that materials processed using scCO(2), when submitted to large stresses, do not obey Hooke´s law and must be considered as hyperelastic.
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spelling pubmed-64736462019-05-03 A Phenomenological Approach to Study Mechanical Properties of Polymeric Porous Structures Processed Using Supercritical CO(2) Tabernero, Antonio Baldino, Lucia Cardea, Stefano Martín del Valle, Eva Reverchon, Ernesto Polymers (Basel) Article This work proposes a modeling of the mechanical properties of porous polymers processed by scCO(2), using a phenomenological approach. Tensile and compression tests of alginate/gelatin and cellulose acetate/graphene oxide were modeled using three hyperelastic equations, derived from strain energy functions. The proposed hyperelastic equations provide a fair good fit for mechanical behavior of the nanofibrous system alginate/gelatin (deviations lower than 10%); whereas, due to the presence of the solid in the polymer network, a four-parameter model must be used to fit the composite cellulose acetate/graphene oxide behavior. Larger deviations from the experimental data were observed for the system cellulose acetate/graphene oxide because of its microporous structure. A finite element method was, then, proposed to model both systems; it allowed a realistic description of observable displacements and effective stresses. The results indicate that materials processed using scCO(2), when submitted to large stresses, do not obey Hooke´s law and must be considered as hyperelastic. MDPI 2019-03-13 /pmc/articles/PMC6473646/ /pubmed/30960469 http://dx.doi.org/10.3390/polym11030485 Text en © 2019 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
Tabernero, Antonio
Baldino, Lucia
Cardea, Stefano
Martín del Valle, Eva
Reverchon, Ernesto
A Phenomenological Approach to Study Mechanical Properties of Polymeric Porous Structures Processed Using Supercritical CO(2)
title A Phenomenological Approach to Study Mechanical Properties of Polymeric Porous Structures Processed Using Supercritical CO(2)
title_full A Phenomenological Approach to Study Mechanical Properties of Polymeric Porous Structures Processed Using Supercritical CO(2)
title_fullStr A Phenomenological Approach to Study Mechanical Properties of Polymeric Porous Structures Processed Using Supercritical CO(2)
title_full_unstemmed A Phenomenological Approach to Study Mechanical Properties of Polymeric Porous Structures Processed Using Supercritical CO(2)
title_short A Phenomenological Approach to Study Mechanical Properties of Polymeric Porous Structures Processed Using Supercritical CO(2)
title_sort phenomenological approach to study mechanical properties of polymeric porous structures processed using supercritical co(2)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6473646/
https://www.ncbi.nlm.nih.gov/pubmed/30960469
http://dx.doi.org/10.3390/polym11030485
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