Biodegradable Barrier Membranes Based on Nanoclays and Carrageenan/Pectin Blends

Detalhes bibliográficos
Autor(a) principal: Coelhoso, Isabel M.
Data de Publicação: 2014
Outros Autores: Ferreira, Ana Rita V., Alves, Vítor D.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10362/160249
Resumo: The authors acknowledge Rocío Castelló for part of the experimental work performed during her training at FCT/UNL in the framework of the Erasmus program. The authors would like to thank also Prof. Isabel Fonseca FCT/UNL for the help in the SEM/EDXS analysis
id RCAP_5c58ad06cc58021987d24a3514fe8481
oai_identifier_str oai:run.unl.pt:10362/160249
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling Biodegradable Barrier Membranes Based on Nanoclays and Carrageenan/Pectin BlendsBiodegradable membranesPectin-carrageenan blendsNanocompositesBarrier propertiesThe authors acknowledge Rocío Castelló for part of the experimental work performed during her training at FCT/UNL in the framework of the Erasmus program. The authors would like to thank also Prof. Isabel Fonseca FCT/UNL for the help in the SEM/EDXS analysisThe aim of this work is the study of the barrier properties of biodegradable membranes based on commercial pectin and kappa-carrageenan and organically modified nanoclays. Membranes (67% k-carrageenan, 33% pectin) with different amounts of nanoclays (1, 5 and 10%) were prepared by the solution intercalation method and casting. The films exhibited enhanced gas and water vapour barrier properties when compared to the ones without nanoclay particles. A water vapour permeability reduction of 35% for a nanoclay loading of 10 % was observed. The positive impact on the films’ barrier properties of the organic nanoclay particles inclusion, results from a combined effect of increased tortuosity and reduction of water sorption due to the hydrophobic nature of the clay. The permeability to carbon dioxide has been significantly reduced (50% reduction for 1% nanoclay content). Scanning electron microscopy coupled with energy dispersive X-ray spectroscopy analysis indicated the presence of under exfoliated nanoclay aggregates at 10%. The membranes have also shown a decrease of their stiffness and an increase of the elongation at break with the inclusion of nanoclay particles. An attenuation of the membranes transparency was observed, however, the colour measured after the application of test membranes on coloured paper sheets, did not change significantly with the inclusion of nanoclay particles.DQ - Departamento de QuímicaCQFB-REQUIMTE - Centro de Química Fina e Biotecnologia (Lab. Associado REQUIMTE)RUNCoelhoso, Isabel M.Ferreira, Ana Rita V.Alves, Vítor D.2023-11-21T22:09:00Z2014-12-052014-12-05T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article8application/pdfhttp://hdl.handle.net/10362/160249engPURE: 36696962https://doi.org/10.15379/2410-1869.2014.01.01.3info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T05:42:50Zoai:run.unl.pt:10362/160249Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:57:55.981206Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Biodegradable Barrier Membranes Based on Nanoclays and Carrageenan/Pectin Blends
title Biodegradable Barrier Membranes Based on Nanoclays and Carrageenan/Pectin Blends
spellingShingle Biodegradable Barrier Membranes Based on Nanoclays and Carrageenan/Pectin Blends
Coelhoso, Isabel M.
Biodegradable membranes
Pectin-carrageenan blends
Nanocomposites
Barrier properties
title_short Biodegradable Barrier Membranes Based on Nanoclays and Carrageenan/Pectin Blends
title_full Biodegradable Barrier Membranes Based on Nanoclays and Carrageenan/Pectin Blends
title_fullStr Biodegradable Barrier Membranes Based on Nanoclays and Carrageenan/Pectin Blends
title_full_unstemmed Biodegradable Barrier Membranes Based on Nanoclays and Carrageenan/Pectin Blends
title_sort Biodegradable Barrier Membranes Based on Nanoclays and Carrageenan/Pectin Blends
author Coelhoso, Isabel M.
author_facet Coelhoso, Isabel M.
Ferreira, Ana Rita V.
Alves, Vítor D.
author_role author
author2 Ferreira, Ana Rita V.
Alves, Vítor D.
author2_role author
author
dc.contributor.none.fl_str_mv DQ - Departamento de Química
CQFB-REQUIMTE - Centro de Química Fina e Biotecnologia (Lab. Associado REQUIMTE)
RUN
dc.contributor.author.fl_str_mv Coelhoso, Isabel M.
Ferreira, Ana Rita V.
Alves, Vítor D.
dc.subject.por.fl_str_mv Biodegradable membranes
Pectin-carrageenan blends
Nanocomposites
Barrier properties
topic Biodegradable membranes
Pectin-carrageenan blends
Nanocomposites
Barrier properties
description The authors acknowledge Rocío Castelló for part of the experimental work performed during her training at FCT/UNL in the framework of the Erasmus program. The authors would like to thank also Prof. Isabel Fonseca FCT/UNL for the help in the SEM/EDXS analysis
publishDate 2014
dc.date.none.fl_str_mv 2014-12-05
2014-12-05T00:00:00Z
2023-11-21T22:09:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10362/160249
url http://hdl.handle.net/10362/160249
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv PURE: 36696962
https://doi.org/10.15379/2410-1869.2014.01.01.3
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 8
application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
_version_ 1799138160973709312

Registros relacionados