Confinement in extruded nanocomposites based on pcl and mesoporous silicas: Effect of pore sizes and their influence in ultimate mechanical response

In this study, nanocomposites based on polycaprolactone (PCL) and two types of mesoporous silicas, MCM-41 and SBA-15, were attained by melt extrusion. The effect of the silica incorporated within the PCL matrix was observed, firstly, in the morphological characteristics and degradation behavior of t...

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Autores: Díez-Rodríguez, Tamara M., Blázquez-Blázquez, Enrique, Antunes, N. L. C,, Ribeiro, M. D. R., Pérez, Enrique, Cerrada, María L.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/258157
Acceso en línea:http://hdl.handle.net/10261/258157
Access Level:acceso abierto
Palabra clave:Mesoporous silica
MCM-41 and SBA-15
PCL nanocomposites
Synchrotron SAXS measurements
Crystallites
Rigidity modulus
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spelling Confinement in extruded nanocomposites based on pcl and mesoporous silicas: Effect of pore sizes and their influence in ultimate mechanical responseDíez-Rodríguez, Tamara M.Blázquez-Blázquez, EnriqueAntunes, N. L. C,Ribeiro, M. D. R.Pérez, EnriqueCerrada, María L.Mesoporous silicaMCM-41 and SBA-15PCL nanocompositesSynchrotron SAXS measurementsCrystallitesRigidity modulusIn this study, nanocomposites based on polycaprolactone (PCL) and two types of mesoporous silicas, MCM-41 and SBA-15, were attained by melt extrusion. The effect of the silica incorporated within the PCL matrix was observed, firstly, in the morphological characteristics and degradation behavior of the resultant composites. DSC experiments provided information on the existence of confinement in the PCL¿SBA-15 materials through the appearance of an additional small endotherm, located at about 25¿50¿C, and attributed to the melting of constrained crystallites. Displacement to a slightly lower temperature of this endothermic event was observed in the first heating run of PCL¿MCM-41 composites, attributed to the inferior pore size in the MCM-41 particles. Thus, this indicates variations in the inclusion of PCL chains within these two mesostructures with different pore sizes. Real-time variable-temperature small-angle X-ray scattering (SAXS) experiments with synchrotron radiation were crucial to confirm the presence of PCL within MCM-41 and SBA-15 pores. Accurate information was also deduced from these measurements regarding the influence of these two mesoporous MCM-41 and SBA-15 silicas on PCL long spacing. The differences found in these morphological and structural features were responsible for the ultimate mechanical response exhibited by the two sets of PCL nanocomposites, with a considerably higher increase of mechanical parameters in the SBA-15 family.This work was supported by the Agencia Estatal de Investigación (AEI, Spain) together with the European Regional Development Fund (FEDER, UE) (grant numbers MAT2016-79869-C2-1-P and PID2020-114930GB-I00), by CSIC (grant number 2020AEP129) and ALBA Synchrotron Light Facility. TMDR is also grateful for her pre-doctoral funding (contract number BES-2017-082284).Peer reviewedMultidisciplinary Digital Publishing InstituteAgencia Estatal de Investigación (España)European CommissionConsejo Superior de Investigaciones Científicas (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2022202220212022info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/258157reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.3390/jcs5120321Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2581572026-05-22T06:33:51Z
dc.title.none.fl_str_mv Confinement in extruded nanocomposites based on pcl and mesoporous silicas: Effect of pore sizes and their influence in ultimate mechanical response
title Confinement in extruded nanocomposites based on pcl and mesoporous silicas: Effect of pore sizes and their influence in ultimate mechanical response
spellingShingle Confinement in extruded nanocomposites based on pcl and mesoporous silicas: Effect of pore sizes and their influence in ultimate mechanical response
Díez-Rodríguez, Tamara M.
Mesoporous silica
MCM-41 and SBA-15
PCL nanocomposites
Synchrotron SAXS measurements
Crystallites
Rigidity modulus
title_short Confinement in extruded nanocomposites based on pcl and mesoporous silicas: Effect of pore sizes and their influence in ultimate mechanical response
title_full Confinement in extruded nanocomposites based on pcl and mesoporous silicas: Effect of pore sizes and their influence in ultimate mechanical response
title_fullStr Confinement in extruded nanocomposites based on pcl and mesoporous silicas: Effect of pore sizes and their influence in ultimate mechanical response
title_full_unstemmed Confinement in extruded nanocomposites based on pcl and mesoporous silicas: Effect of pore sizes and their influence in ultimate mechanical response
title_sort Confinement in extruded nanocomposites based on pcl and mesoporous silicas: Effect of pore sizes and their influence in ultimate mechanical response
dc.creator.none.fl_str_mv Díez-Rodríguez, Tamara M.
Blázquez-Blázquez, Enrique
Antunes, N. L. C,
Ribeiro, M. D. R.
Pérez, Enrique
Cerrada, María L.
author Díez-Rodríguez, Tamara M.
author_facet Díez-Rodríguez, Tamara M.
Blázquez-Blázquez, Enrique
Antunes, N. L. C,
Ribeiro, M. D. R.
Pérez, Enrique
Cerrada, María L.
author_role author
author2 Blázquez-Blázquez, Enrique
Antunes, N. L. C,
Ribeiro, M. D. R.
Pérez, Enrique
Cerrada, María L.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Agencia Estatal de Investigación (España)
European Commission
Consejo Superior de Investigaciones Científicas (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Mesoporous silica
MCM-41 and SBA-15
PCL nanocomposites
Synchrotron SAXS measurements
Crystallites
Rigidity modulus
topic Mesoporous silica
MCM-41 and SBA-15
PCL nanocomposites
Synchrotron SAXS measurements
Crystallites
Rigidity modulus
description In this study, nanocomposites based on polycaprolactone (PCL) and two types of mesoporous silicas, MCM-41 and SBA-15, were attained by melt extrusion. The effect of the silica incorporated within the PCL matrix was observed, firstly, in the morphological characteristics and degradation behavior of the resultant composites. DSC experiments provided information on the existence of confinement in the PCL¿SBA-15 materials through the appearance of an additional small endotherm, located at about 25¿50¿C, and attributed to the melting of constrained crystallites. Displacement to a slightly lower temperature of this endothermic event was observed in the first heating run of PCL¿MCM-41 composites, attributed to the inferior pore size in the MCM-41 particles. Thus, this indicates variations in the inclusion of PCL chains within these two mesostructures with different pore sizes. Real-time variable-temperature small-angle X-ray scattering (SAXS) experiments with synchrotron radiation were crucial to confirm the presence of PCL within MCM-41 and SBA-15 pores. Accurate information was also deduced from these measurements regarding the influence of these two mesoporous MCM-41 and SBA-15 silicas on PCL long spacing. The differences found in these morphological and structural features were responsible for the ultimate mechanical response exhibited by the two sets of PCL nanocomposites, with a considerably higher increase of mechanical parameters in the SBA-15 family.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/258157
url http://hdl.handle.net/10261/258157
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.3390/jcs5120321
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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