Effect of chitin nanocrystals on crystallization and properties of poly(lactic acid)-based nanocomposites

The crystalline phase of poly(lactic acid) (PLA) has crucial effects on its own properties and nanocomposites. In this study, the isothermal crystallization of PLA, triethyl citrate-plasticized PLA (PLA–TEC), and its nanocomposite with chitin nanocrystals (PLA–TEC–ChNC) at different temperatures and...

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Detalles Bibliográficos
Autores: Singh, Shikha, Maspoch Rulduà, M. Lluïsa|||0000-0002-4813-6412
Tipo de recurso: artículo
Fecha de publicación:2020
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:2117/340883
Acceso en línea:https://hdl.handle.net/2117/340883
https://dx.doi.org/10.3390/polym12030726
Access Level:acceso abierto
Palabra clave:Nanocomposites (Materials)
Nanocrystals
Poly(lactic acid)
Chitin nanocrystals
Nanocomposites
Liquid-assisted extrusion
Crystallinity
Barrier properties
Hydrolytic degradation
Nanocompòsits (Materials)
Nanocristalls
Àrees temàtiques de la UPC::Enginyeria dels materials
id ES_0e174738de7d761957e363dfd4c62e6c
oai_identifier_str oai:upcommons.upc.edu:2117/340883
network_acronym_str ES
network_name_str España
repository_id_str
spelling Effect of chitin nanocrystals on crystallization and properties of poly(lactic acid)-based nanocompositesSingh, ShikhaMaspoch Rulduà, M. Lluïsa|||0000-0002-4813-6412Nanocomposites (Materials)NanocrystalsPoly(lactic acid)Chitin nanocrystalsNanocompositesLiquid-assisted extrusionCrystallinityBarrier propertiesHydrolytic degradationNanocompòsits (Materials)NanocristallsÀrees temàtiques de la UPC::Enginyeria dels materialsThe crystalline phase of poly(lactic acid) (PLA) has crucial effects on its own properties and nanocomposites. In this study, the isothermal crystallization of PLA, triethyl citrate-plasticized PLA (PLA–TEC), and its nanocomposite with chitin nanocrystals (PLA–TEC–ChNC) at different temperatures and times was investigated, and the resulting properties of the materials were characterized. Both PLA and PLA–TEC showed extremely low crystallinity at isothermal temperatures of 135, 130, 125 °C and times of 5 or 15 min. In contrast, the addition of 1 wt % of ChNCs significantly improved the crystallinity of PLA under the same conditions owing to the nucleation effect of the ChNCs. The samples were also crystallized at 110 °C to reach their maximal crystallinity, and PLA–TEC–ChNC achieved 48% crystallinity within 5 min, while PLA and PLA–TEC required 40 min to reach a similar level. Moreover, X-ray diffraction analysis showed that the addition of ChNCs resulted in smaller crystallite sizes, which further influenced the barrier properties and hydrolytic degradation of the PLA. The nanocomposites had considerably lower barrier properties and underwent faster degradation compared to PLA–TEC110. These results confirm that the addition of ChNCs in PLA leads to promising properties for packaging applications.Peer ReviewedMultidisciplinary Digital Publishing Institute (MDPI)20202020-03-0120212021-03-03journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/340883https://dx.doi.org/10.3390/polym12030726reponame: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:2117/3408832026-05-27T15:37:01Z
dc.title.none.fl_str_mv Effect of chitin nanocrystals on crystallization and properties of poly(lactic acid)-based nanocomposites
title Effect of chitin nanocrystals on crystallization and properties of poly(lactic acid)-based nanocomposites
spellingShingle Effect of chitin nanocrystals on crystallization and properties of poly(lactic acid)-based nanocomposites
Singh, Shikha
Nanocomposites (Materials)
Nanocrystals
Poly(lactic acid)
Chitin nanocrystals
Nanocomposites
Liquid-assisted extrusion
Crystallinity
Barrier properties
Hydrolytic degradation
Nanocompòsits (Materials)
Nanocristalls
Àrees temàtiques de la UPC::Enginyeria dels materials
title_short Effect of chitin nanocrystals on crystallization and properties of poly(lactic acid)-based nanocomposites
title_full Effect of chitin nanocrystals on crystallization and properties of poly(lactic acid)-based nanocomposites
title_fullStr Effect of chitin nanocrystals on crystallization and properties of poly(lactic acid)-based nanocomposites
title_full_unstemmed Effect of chitin nanocrystals on crystallization and properties of poly(lactic acid)-based nanocomposites
title_sort Effect of chitin nanocrystals on crystallization and properties of poly(lactic acid)-based nanocomposites
dc.creator.none.fl_str_mv Singh, Shikha
Maspoch Rulduà, M. Lluïsa|||0000-0002-4813-6412
author Singh, Shikha
author_facet Singh, Shikha
Maspoch Rulduà, M. Lluïsa|||0000-0002-4813-6412
author_role author
author2 Maspoch Rulduà, M. Lluïsa|||0000-0002-4813-6412
author2_role author
dc.subject.none.fl_str_mv Nanocomposites (Materials)
Nanocrystals
Poly(lactic acid)
Chitin nanocrystals
Nanocomposites
Liquid-assisted extrusion
Crystallinity
Barrier properties
Hydrolytic degradation
Nanocompòsits (Materials)
Nanocristalls
Àrees temàtiques de la UPC::Enginyeria dels materials
topic Nanocomposites (Materials)
Nanocrystals
Poly(lactic acid)
Chitin nanocrystals
Nanocomposites
Liquid-assisted extrusion
Crystallinity
Barrier properties
Hydrolytic degradation
Nanocompòsits (Materials)
Nanocristalls
Àrees temàtiques de la UPC::Enginyeria dels materials
description The crystalline phase of poly(lactic acid) (PLA) has crucial effects on its own properties and nanocomposites. In this study, the isothermal crystallization of PLA, triethyl citrate-plasticized PLA (PLA–TEC), and its nanocomposite with chitin nanocrystals (PLA–TEC–ChNC) at different temperatures and times was investigated, and the resulting properties of the materials were characterized. Both PLA and PLA–TEC showed extremely low crystallinity at isothermal temperatures of 135, 130, 125 °C and times of 5 or 15 min. In contrast, the addition of 1 wt % of ChNCs significantly improved the crystallinity of PLA under the same conditions owing to the nucleation effect of the ChNCs. The samples were also crystallized at 110 °C to reach their maximal crystallinity, and PLA–TEC–ChNC achieved 48% crystallinity within 5 min, while PLA and PLA–TEC required 40 min to reach a similar level. Moreover, X-ray diffraction analysis showed that the addition of ChNCs resulted in smaller crystallite sizes, which further influenced the barrier properties and hydrolytic degradation of the PLA. The nanocomposites had considerably lower barrier properties and underwent faster degradation compared to PLA–TEC110. These results confirm that the addition of ChNCs in PLA leads to promising properties for packaging applications.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-03-01
2021
2021-03-03
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/340883
https://dx.doi.org/10.3390/polym12030726
url https://hdl.handle.net/2117/340883
https://dx.doi.org/10.3390/polym12030726
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 Multidisciplinary Digital Publishing Institute (MDPI)
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute (MDPI)
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
_version_ 1869403376099262464
score 15.198674

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