Study of the matrix-filler interface in PLA/Mg composites manufactured by Material Extrusion using a colloidal feedstock

The aim of this paper is to investigate the evolution of a matrix-filler interface during the processing of novel composites formed by a matrix of polylactic acid (PLA) and Mg particles, when they are manufactured by Materials Extrusion. The particles addition to the PLA was carried out through the...

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Autores: Fernández-Montero, A., Lieblich, Marcela, Benavente, R., González-Carrasco, José Luis, Ferrari, Begoña
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2020
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/208490
Acceso en línea:http://hdl.handle.net/10261/208490
Access Level:acceso abierto
Palabra clave:PLA/Mg
Materials extrusion
Filler-matrix bond
Particle surface modification
Additive manufacturing
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spelling Study of the matrix-filler interface in PLA/Mg composites manufactured by Material Extrusion using a colloidal feedstockFernández-Montero, A.Lieblich, MarcelaBenavente, R.González-Carrasco, José LuisFerrari, BegoñaPLA/MgMaterials extrusionFiller-matrix bondParticle surface modificationAdditive manufacturingThe aim of this paper is to investigate the evolution of a matrix-filler interface during the processing of novel composites formed by a matrix of polylactic acid (PLA) and Mg particles, when they are manufactured by Materials Extrusion. The particles addition to the PLA was carried out through the preparation of a Magnesium stable suspension in the polymer solution. To improve the Mg dispersion, the surfaces of the particles were previously modified by the adsorption of dispersants, namely Polyethylenimine (PEI) and Cetyltrimethylammonium bromide (CTAB) in aqueous suspension. The physical and mechanical characterization of PLA/Mg composites show that the Mg surface modification is the key to its successful dispersion due to the formation of ionic interactions between the dispersants and the matrix. This is favoured by the seeding effect of the PEI-modified Mg particles over the PLA re-precipitation during the composite shaping. Moreover, a PEI-PLA covalent bond appeared in the printed scaffolds as a consequence of the temperature applied (165¿°C) during extrusion and printing. Consequently, the matrix-filler strengthened interface improved the extrusion process and permits the printing of 3D customized pieces. At the same time, particle agglomeration and the nozzle blocking is prevented.Peer reviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2020202020202020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionapplication/mswordhttp://hdl.handle.net/10261/208490reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1016/j.addma.2020.101142Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2084902026-05-22T06:33:51Z
dc.title.none.fl_str_mv Study of the matrix-filler interface in PLA/Mg composites manufactured by Material Extrusion using a colloidal feedstock
title Study of the matrix-filler interface in PLA/Mg composites manufactured by Material Extrusion using a colloidal feedstock
spellingShingle Study of the matrix-filler interface in PLA/Mg composites manufactured by Material Extrusion using a colloidal feedstock
Fernández-Montero, A.
PLA/Mg
Materials extrusion
Filler-matrix bond
Particle surface modification
Additive manufacturing
title_short Study of the matrix-filler interface in PLA/Mg composites manufactured by Material Extrusion using a colloidal feedstock
title_full Study of the matrix-filler interface in PLA/Mg composites manufactured by Material Extrusion using a colloidal feedstock
title_fullStr Study of the matrix-filler interface in PLA/Mg composites manufactured by Material Extrusion using a colloidal feedstock
title_full_unstemmed Study of the matrix-filler interface in PLA/Mg composites manufactured by Material Extrusion using a colloidal feedstock
title_sort Study of the matrix-filler interface in PLA/Mg composites manufactured by Material Extrusion using a colloidal feedstock
dc.creator.none.fl_str_mv Fernández-Montero, A.
Lieblich, Marcela
Benavente, R.
González-Carrasco, José Luis
Ferrari, Begoña
author Fernández-Montero, A.
author_facet Fernández-Montero, A.
Lieblich, Marcela
Benavente, R.
González-Carrasco, José Luis
Ferrari, Begoña
author_role author
author2 Lieblich, Marcela
Benavente, R.
González-Carrasco, José Luis
Ferrari, Begoña
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv PLA/Mg
Materials extrusion
Filler-matrix bond
Particle surface modification
Additive manufacturing
topic PLA/Mg
Materials extrusion
Filler-matrix bond
Particle surface modification
Additive manufacturing
description The aim of this paper is to investigate the evolution of a matrix-filler interface during the processing of novel composites formed by a matrix of polylactic acid (PLA) and Mg particles, when they are manufactured by Materials Extrusion. The particles addition to the PLA was carried out through the preparation of a Magnesium stable suspension in the polymer solution. To improve the Mg dispersion, the surfaces of the particles were previously modified by the adsorption of dispersants, namely Polyethylenimine (PEI) and Cetyltrimethylammonium bromide (CTAB) in aqueous suspension. The physical and mechanical characterization of PLA/Mg composites show that the Mg surface modification is the key to its successful dispersion due to the formation of ionic interactions between the dispersants and the matrix. This is favoured by the seeding effect of the PEI-modified Mg particles over the PLA re-precipitation during the composite shaping. Moreover, a PEI-PLA covalent bond appeared in the printed scaffolds as a consequence of the temperature applied (165¿°C) during extrusion and printing. Consequently, the matrix-filler strengthened interface improved the extrusion process and permits the printing of 3D customized pieces. At the same time, particle agglomeration and the nozzle blocking is prevented.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/208490
url http://hdl.handle.net/10261/208490
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1016/j.addma.2020.101142
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/msword
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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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