Structure and permeability of Low-Methoxyl Pectin (LMP)-Sodium alginates (NaAlg) films

Autores
Pérez Lambrech, María V.; Sorrivas, Viviana; Villar, Marcelo Armando; Lozano, Jorge Enrique
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Alginate and pectin form synergistic mixed gels that lead to a microstructure totally different from that of pure biopolymers. Synergistic mixed gels are of particular interest as makers of films with new improved characteristics. The objectives of the present work were, (a) to develop composite biodegradable films based on sodium alginate (NaAlg) and low-methoxyl pectin (LMP), (b) to evaluate the water vapor (WVP) and oxygen permeability, and (c) to characterize film microstructure by electron microscopy. A film-forming solution was prepared by adding 2% w/w of NaAlg, LMP or their mixtures, in a constantly stirred solution of NaCl (0,1M), during 4 h and then poured into Petri glass plates and allowed to dry at ambient, resulting in about 40 jam films. WVTR was determined gravimetrically using a modified ASTM Method E 96-95, and oxygen permeability of the prepared films was measured according to ASTM D3985. Films structure was characterized using both transmission (TEM) and scanning (SEM) electron microscopy. Results indicated that water vapor permeation follows Henry's law after two weeks of assay. Water permeability reduced in mixed biopolymer films, indicating NaAlg/LMP synergism. Pure pectin films resulted a better water vapor barrier, indicating the molecular weight has not effect on permeability. On the other hand, the reduction in permeability by alginate adding was assumed to be a result of the filling of pectin net. Permeability to oxygen was irrelevant. Confirming permeability assays, SEM micrographs of 1:1 alginate/pectin films show surface with lower porosity than pure (pectin or alginate) films. Moreover, TEM studies at the higher magnification (140,000X) also show a closer and denser nature in the case of mixed networks.
Fil: Pérez Lambrech, María V.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina
Fil: Sorrivas, Viviana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina
Fil: Villar, Marcelo Armando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina
Fil: Lozano, Jorge Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina
Materia
Pectin
Alginate
Films
Structure
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/60992
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/60992
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Structure and permeability of Low-Methoxyl Pectin (LMP)-Sodium alginates (NaAlg) filmsPérez Lambrech, María V.Sorrivas, VivianaVillar, Marcelo ArmandoLozano, Jorge EnriquePectinAlginateFilmsStructurehttps://purl.org/becyt/ford/2.11https://purl.org/becyt/ford/2Alginate and pectin form synergistic mixed gels that lead to a microstructure totally different from that of pure biopolymers. Synergistic mixed gels are of particular interest as makers of films with new improved characteristics. The objectives of the present work were, (a) to develop composite biodegradable films based on sodium alginate (NaAlg) and low-methoxyl pectin (LMP), (b) to evaluate the water vapor (WVP) and oxygen permeability, and (c) to characterize film microstructure by electron microscopy. A film-forming solution was prepared by adding 2% w/w of NaAlg, LMP or their mixtures, in a constantly stirred solution of NaCl (0,1M), during 4 h and then poured into Petri glass plates and allowed to dry at ambient, resulting in about 40 jam films. WVTR was determined gravimetrically using a modified ASTM Method E 96-95, and oxygen permeability of the prepared films was measured according to ASTM D3985. Films structure was characterized using both transmission (TEM) and scanning (SEM) electron microscopy. Results indicated that water vapor permeation follows Henry's law after two weeks of assay. Water permeability reduced in mixed biopolymer films, indicating NaAlg/LMP synergism. Pure pectin films resulted a better water vapor barrier, indicating the molecular weight has not effect on permeability. On the other hand, the reduction in permeability by alginate adding was assumed to be a result of the filling of pectin net. Permeability to oxygen was irrelevant. Confirming permeability assays, SEM micrographs of 1:1 alginate/pectin films show surface with lower porosity than pure (pectin or alginate) films. Moreover, TEM studies at the higher magnification (140,000X) also show a closer and denser nature in the case of mixed networks.Fil: Pérez Lambrech, María V.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; ArgentinaFil: Sorrivas, Viviana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; ArgentinaFil: Villar, Marcelo Armando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; ArgentinaFil: Lozano, Jorge Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; ArgentinaAssociazione Italiana Di Ingegneria Chimica2009-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/60992Pérez Lambrech, María V.; Sorrivas, Viviana; Villar, Marcelo Armando; Lozano, Jorge Enrique; Structure and permeability of Low-Methoxyl Pectin (LMP)-Sodium alginates (NaAlg) films; Associazione Italiana Di Ingegneria Chimica; Chemical Engineering Transactions; 17; 12-2009; 1765-17701974-9791CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.aidic.it/cet/09/00.htmlinfo:eu-repo/semantics/altIdentifier/doi/10.3303/CET0917295info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-29T11:43:44Zoai:ri.conicet.gov.ar:11336/60992instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-29 11:43:45.236CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Structure and permeability of Low-Methoxyl Pectin (LMP)-Sodium alginates (NaAlg) films
title Structure and permeability of Low-Methoxyl Pectin (LMP)-Sodium alginates (NaAlg) films
spellingShingle Structure and permeability of Low-Methoxyl Pectin (LMP)-Sodium alginates (NaAlg) films
Pérez Lambrech, María V.
Pectin
Alginate
Films
Structure
title_short Structure and permeability of Low-Methoxyl Pectin (LMP)-Sodium alginates (NaAlg) films
title_full Structure and permeability of Low-Methoxyl Pectin (LMP)-Sodium alginates (NaAlg) films
title_fullStr Structure and permeability of Low-Methoxyl Pectin (LMP)-Sodium alginates (NaAlg) films
title_full_unstemmed Structure and permeability of Low-Methoxyl Pectin (LMP)-Sodium alginates (NaAlg) films
title_sort Structure and permeability of Low-Methoxyl Pectin (LMP)-Sodium alginates (NaAlg) films
dc.creator.none.fl_str_mv Pérez Lambrech, María V.
Sorrivas, Viviana
Villar, Marcelo Armando
Lozano, Jorge Enrique
author Pérez Lambrech, María V.
author_facet Pérez Lambrech, María V.
Sorrivas, Viviana
Villar, Marcelo Armando
Lozano, Jorge Enrique
author_role author
author2 Sorrivas, Viviana
Villar, Marcelo Armando
Lozano, Jorge Enrique
author2_role author
author
author
dc.subject.none.fl_str_mv Pectin
Alginate
Films
Structure
topic Pectin
Alginate
Films
Structure
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.11
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Alginate and pectin form synergistic mixed gels that lead to a microstructure totally different from that of pure biopolymers. Synergistic mixed gels are of particular interest as makers of films with new improved characteristics. The objectives of the present work were, (a) to develop composite biodegradable films based on sodium alginate (NaAlg) and low-methoxyl pectin (LMP), (b) to evaluate the water vapor (WVP) and oxygen permeability, and (c) to characterize film microstructure by electron microscopy. A film-forming solution was prepared by adding 2% w/w of NaAlg, LMP or their mixtures, in a constantly stirred solution of NaCl (0,1M), during 4 h and then poured into Petri glass plates and allowed to dry at ambient, resulting in about 40 jam films. WVTR was determined gravimetrically using a modified ASTM Method E 96-95, and oxygen permeability of the prepared films was measured according to ASTM D3985. Films structure was characterized using both transmission (TEM) and scanning (SEM) electron microscopy. Results indicated that water vapor permeation follows Henry's law after two weeks of assay. Water permeability reduced in mixed biopolymer films, indicating NaAlg/LMP synergism. Pure pectin films resulted a better water vapor barrier, indicating the molecular weight has not effect on permeability. On the other hand, the reduction in permeability by alginate adding was assumed to be a result of the filling of pectin net. Permeability to oxygen was irrelevant. Confirming permeability assays, SEM micrographs of 1:1 alginate/pectin films show surface with lower porosity than pure (pectin or alginate) films. Moreover, TEM studies at the higher magnification (140,000X) also show a closer and denser nature in the case of mixed networks.
Fil: Pérez Lambrech, María V.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina
Fil: Sorrivas, Viviana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina
Fil: Villar, Marcelo Armando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina
Fil: Lozano, Jorge Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina
description Alginate and pectin form synergistic mixed gels that lead to a microstructure totally different from that of pure biopolymers. Synergistic mixed gels are of particular interest as makers of films with new improved characteristics. The objectives of the present work were, (a) to develop composite biodegradable films based on sodium alginate (NaAlg) and low-methoxyl pectin (LMP), (b) to evaluate the water vapor (WVP) and oxygen permeability, and (c) to characterize film microstructure by electron microscopy. A film-forming solution was prepared by adding 2% w/w of NaAlg, LMP or their mixtures, in a constantly stirred solution of NaCl (0,1M), during 4 h and then poured into Petri glass plates and allowed to dry at ambient, resulting in about 40 jam films. WVTR was determined gravimetrically using a modified ASTM Method E 96-95, and oxygen permeability of the prepared films was measured according to ASTM D3985. Films structure was characterized using both transmission (TEM) and scanning (SEM) electron microscopy. Results indicated that water vapor permeation follows Henry's law after two weeks of assay. Water permeability reduced in mixed biopolymer films, indicating NaAlg/LMP synergism. Pure pectin films resulted a better water vapor barrier, indicating the molecular weight has not effect on permeability. On the other hand, the reduction in permeability by alginate adding was assumed to be a result of the filling of pectin net. Permeability to oxygen was irrelevant. Confirming permeability assays, SEM micrographs of 1:1 alginate/pectin films show surface with lower porosity than pure (pectin or alginate) films. Moreover, TEM studies at the higher magnification (140,000X) also show a closer and denser nature in the case of mixed networks.
publishDate 2009
dc.date.none.fl_str_mv 2009-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/60992
Pérez Lambrech, María V.; Sorrivas, Viviana; Villar, Marcelo Armando; Lozano, Jorge Enrique; Structure and permeability of Low-Methoxyl Pectin (LMP)-Sodium alginates (NaAlg) films; Associazione Italiana Di Ingegneria Chimica; Chemical Engineering Transactions; 17; 12-2009; 1765-1770
1974-9791
CONICET Digital
CONICET
url http://hdl.handle.net/11336/60992
identifier_str_mv Pérez Lambrech, María V.; Sorrivas, Viviana; Villar, Marcelo Armando; Lozano, Jorge Enrique; Structure and permeability of Low-Methoxyl Pectin (LMP)-Sodium alginates (NaAlg) films; Associazione Italiana Di Ingegneria Chimica; Chemical Engineering Transactions; 17; 12-2009; 1765-1770
1974-9791
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.aidic.it/cet/09/00.html
info:eu-repo/semantics/altIdentifier/doi/10.3303/CET0917295
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Associazione Italiana Di Ingegneria Chimica
publisher.none.fl_str_mv Associazione Italiana Di Ingegneria Chimica
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.10058

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