Molecular mobility, composition and structure analysis in glycerol plasticised chitosan films

Detalhes bibliográficos
Autor(a) principal: Fundo, Joana F.
Data de Publicação: 2014
Outros Autores: Fernandes, Rui, Almeida, Pedro L., Carvalho, Alexandra, Feio, Gabriel, Silva, Cristina L. M., Quintas, Mafalda A. C.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.21/4985
Resumo: This study was developed with the purpose to investigate the effect of polysaccharide/plasticiser concentration on the microstructure and molecular dynamics of polymeric film systems, using transmission electron microscope imaging (TEM) and nuclear magnetic resonance (NMR) techniques. Experiments were carried out in chitosan/glycerol films prepared with solutions of different composition. The films obtained after drying and equilibration were characterised in terms of composition, thickness and water activity. Results show that glycerol quantities used in film forming solutions were responsible for films composition; while polymer/total plasticiser ratio in the solution determined the thickness (and thus structure) of the films. These results were confirmed by TEM. NMR allowed understanding the films molecular rearrangement. Two different behaviours for the two components analysed, water and glycerol were observed: the first is predominantly moving free in the matrix, while glycerol is mainly bounded to the chitosan chain. (C) 2013 Elsevier Ltd. All rights reserved.
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spelling Molecular mobility, composition and structure analysis in glycerol plasticised chitosan filmsEdible filmsMicrostructureNMRMolecular dynamicsStructure functionWater behaviourThis study was developed with the purpose to investigate the effect of polysaccharide/plasticiser concentration on the microstructure and molecular dynamics of polymeric film systems, using transmission electron microscope imaging (TEM) and nuclear magnetic resonance (NMR) techniques. Experiments were carried out in chitosan/glycerol films prepared with solutions of different composition. The films obtained after drying and equilibration were characterised in terms of composition, thickness and water activity. Results show that glycerol quantities used in film forming solutions were responsible for films composition; while polymer/total plasticiser ratio in the solution determined the thickness (and thus structure) of the films. These results were confirmed by TEM. NMR allowed understanding the films molecular rearrangement. Two different behaviours for the two components analysed, water and glycerol were observed: the first is predominantly moving free in the matrix, while glycerol is mainly bounded to the chitosan chain. (C) 2013 Elsevier Ltd. All rights reserved.Elsevier Science LTDRCIPLFundo, Joana F.Fernandes, RuiAlmeida, Pedro L.Carvalho, AlexandraFeio, GabrielSilva, Cristina L. M.Quintas, Mafalda A. C.2015-08-25T10:41:46Z2014-02-012014-02-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.21/4985engFUNDO, Joana; [et al] – Molecular mobility, composition and structure analysis in glycerol plasticised chitosan films. Food Chemistry. ISSN: 0308-8146. Vol. 144 (2014), pp. 2-80308-814610.1016/j.foodchem.2013.05.127metadata only accessinfo: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:RCAAP2023-08-03T09:47:47Zoai:repositorio.ipl.pt:10400.21/4985Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:14:20.170645Repositório 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 Molecular mobility, composition and structure analysis in glycerol plasticised chitosan films
title Molecular mobility, composition and structure analysis in glycerol plasticised chitosan films
spellingShingle Molecular mobility, composition and structure analysis in glycerol plasticised chitosan films
Fundo, Joana F.
Edible films
Microstructure
NMR
Molecular dynamics
Structure function
Water behaviour
title_short Molecular mobility, composition and structure analysis in glycerol plasticised chitosan films
title_full Molecular mobility, composition and structure analysis in glycerol plasticised chitosan films
title_fullStr Molecular mobility, composition and structure analysis in glycerol plasticised chitosan films
title_full_unstemmed Molecular mobility, composition and structure analysis in glycerol plasticised chitosan films
title_sort Molecular mobility, composition and structure analysis in glycerol plasticised chitosan films
author Fundo, Joana F.
author_facet Fundo, Joana F.
Fernandes, Rui
Almeida, Pedro L.
Carvalho, Alexandra
Feio, Gabriel
Silva, Cristina L. M.
Quintas, Mafalda A. C.
author_role author
author2 Fernandes, Rui
Almeida, Pedro L.
Carvalho, Alexandra
Feio, Gabriel
Silva, Cristina L. M.
Quintas, Mafalda A. C.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv RCIPL
dc.contributor.author.fl_str_mv Fundo, Joana F.
Fernandes, Rui
Almeida, Pedro L.
Carvalho, Alexandra
Feio, Gabriel
Silva, Cristina L. M.
Quintas, Mafalda A. C.
dc.subject.por.fl_str_mv Edible films
Microstructure
NMR
Molecular dynamics
Structure function
Water behaviour
topic Edible films
Microstructure
NMR
Molecular dynamics
Structure function
Water behaviour
description This study was developed with the purpose to investigate the effect of polysaccharide/plasticiser concentration on the microstructure and molecular dynamics of polymeric film systems, using transmission electron microscope imaging (TEM) and nuclear magnetic resonance (NMR) techniques. Experiments were carried out in chitosan/glycerol films prepared with solutions of different composition. The films obtained after drying and equilibration were characterised in terms of composition, thickness and water activity. Results show that glycerol quantities used in film forming solutions were responsible for films composition; while polymer/total plasticiser ratio in the solution determined the thickness (and thus structure) of the films. These results were confirmed by TEM. NMR allowed understanding the films molecular rearrangement. Two different behaviours for the two components analysed, water and glycerol were observed: the first is predominantly moving free in the matrix, while glycerol is mainly bounded to the chitosan chain. (C) 2013 Elsevier Ltd. All rights reserved.
publishDate 2014
dc.date.none.fl_str_mv 2014-02-01
2014-02-01T00:00:00Z
2015-08-25T10:41:46Z
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/10400.21/4985
url http://hdl.handle.net/10400.21/4985
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv FUNDO, Joana; [et al] – Molecular mobility, composition and structure analysis in glycerol plasticised chitosan films. Food Chemistry. ISSN: 0308-8146. Vol. 144 (2014), pp. 2-8
0308-8146
10.1016/j.foodchem.2013.05.127
dc.rights.driver.fl_str_mv metadata only access
info:eu-repo/semantics/openAccess
rights_invalid_str_mv metadata only access
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier Science LTD
publisher.none.fl_str_mv Elsevier Science LTD
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
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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
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