Crystallization of triethyl-citrate-plasticized poly(lactic acid) induced by chitin nanocrystals

The aim of this study was to gain a better understanding of the crystallization behavior of triethyl-citrate-plasticized poly(lactic acid) (PLA–TEC) in the presence of chitin nanocrystals (ChNCs). The isothermal crystallization behavior of PLA–TEC was studied by polarized optical microscopy, scannin...

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Autores: Singh, Shikha, Maspoch Rulduà, M. Lluïsa|||0000-0002-4813-6412, Oksman, Kristiina
Tipo de recurso: artículo
Fecha de publicación:2019
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/176510
Acceso en línea:https://hdl.handle.net/2117/176510
https://dx.doi.org/10.1002/app.47936
Access Level:acceso abierto
Palabra clave:Nanocrystals
Chitin nanocrystals
Isothermal crystallization
Microstructure
Plasticizer
Poly(lactic acid)
Cristal·lització
Nanocristalls
Àrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers
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network_acronym_str ES
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repository_id_str
spelling Crystallization of triethyl-citrate-plasticized poly(lactic acid) induced by chitin nanocrystalsSingh, ShikhaMaspoch Rulduà, M. Lluïsa|||0000-0002-4813-6412Oksman, KristiinaNanocrystalsChitin nanocrystalsIsothermal crystallizationMicrostructurePlasticizerPoly(lactic acid)Cristal·litzacióNanocristallsÀrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímersThe aim of this study was to gain a better understanding of the crystallization behavior of triethyl-citrate-plasticized poly(lactic acid) (PLA–TEC) in the presence of chitin nanocrystals (ChNCs). The isothermal crystallization behavior of PLA–TEC was studied by polarized optical microscopy, scanning electron microscopy, differential scanning calorimetry, and X-ray diffraction (XRD). Interestingly, the addition of just 1 wt % ChNCs in PLA–TEC increased the crystallization rate in the temperature range of 135–125 °C. The microscopy studies confirmed the presence of at least three distinct types of spherulites: negative, neutral, and ring banded. The ChNCs also increased the degree of crystallinity up to 32%, even at a fast cooling rate of 25¿°C min-1. The XRD studies further revealed the nucleation effect induced by the addition of ChNCs and thus explained the faster crystallization rate. To conclude, the addition of a small amount (1 wt %) of ChNC to plasticized PLA significantly affected its nucleation, crystal size, and crystallization speed; therefore, the proposed route can be considered suitable for improving the crystallization behavior of PLA.Peer ReviewedWiley20192019-01-0120202020-02-03journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/176510https://dx.doi.org/10.1002/app.47936reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivs 3.0 Spainhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/1765102026-05-27T15:37:01Z
dc.title.none.fl_str_mv Crystallization of triethyl-citrate-plasticized poly(lactic acid) induced by chitin nanocrystals
title Crystallization of triethyl-citrate-plasticized poly(lactic acid) induced by chitin nanocrystals
spellingShingle Crystallization of triethyl-citrate-plasticized poly(lactic acid) induced by chitin nanocrystals
Singh, Shikha
Nanocrystals
Chitin nanocrystals
Isothermal crystallization
Microstructure
Plasticizer
Poly(lactic acid)
Cristal·lització
Nanocristalls
Àrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers
title_short Crystallization of triethyl-citrate-plasticized poly(lactic acid) induced by chitin nanocrystals
title_full Crystallization of triethyl-citrate-plasticized poly(lactic acid) induced by chitin nanocrystals
title_fullStr Crystallization of triethyl-citrate-plasticized poly(lactic acid) induced by chitin nanocrystals
title_full_unstemmed Crystallization of triethyl-citrate-plasticized poly(lactic acid) induced by chitin nanocrystals
title_sort Crystallization of triethyl-citrate-plasticized poly(lactic acid) induced by chitin nanocrystals
dc.creator.none.fl_str_mv Singh, Shikha
Maspoch Rulduà, M. Lluïsa|||0000-0002-4813-6412
Oksman, Kristiina
author Singh, Shikha
author_facet Singh, Shikha
Maspoch Rulduà, M. Lluïsa|||0000-0002-4813-6412
Oksman, Kristiina
author_role author
author2 Maspoch Rulduà, M. Lluïsa|||0000-0002-4813-6412
Oksman, Kristiina
author2_role author
author
dc.subject.none.fl_str_mv Nanocrystals
Chitin nanocrystals
Isothermal crystallization
Microstructure
Plasticizer
Poly(lactic acid)
Cristal·lització
Nanocristalls
Àrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers
topic Nanocrystals
Chitin nanocrystals
Isothermal crystallization
Microstructure
Plasticizer
Poly(lactic acid)
Cristal·lització
Nanocristalls
Àrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers
description The aim of this study was to gain a better understanding of the crystallization behavior of triethyl-citrate-plasticized poly(lactic acid) (PLA–TEC) in the presence of chitin nanocrystals (ChNCs). The isothermal crystallization behavior of PLA–TEC was studied by polarized optical microscopy, scanning electron microscopy, differential scanning calorimetry, and X-ray diffraction (XRD). Interestingly, the addition of just 1 wt % ChNCs in PLA–TEC increased the crystallization rate in the temperature range of 135–125 °C. The microscopy studies confirmed the presence of at least three distinct types of spherulites: negative, neutral, and ring banded. The ChNCs also increased the degree of crystallinity up to 32%, even at a fast cooling rate of 25¿°C min-1. The XRD studies further revealed the nucleation effect induced by the addition of ChNCs and thus explained the faster crystallization rate. To conclude, the addition of a small amount (1 wt %) of ChNC to plasticized PLA significantly affected its nucleation, crystal size, and crystallization speed; therefore, the proposed route can be considered suitable for improving the crystallization behavior of PLA.
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-01-01
2020
2020-02-03
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/176510
https://dx.doi.org/10.1002/app.47936
url https://hdl.handle.net/2117/176510
https://dx.doi.org/10.1002/app.47936
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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