Influence of the extraction–purification conditions on final properties of alginates obtained from brown algae (Macrocystis pyrifera)

Autores
Gomez, Cesar Gerardo; Perez, María Victoria; Lozano, Jorge Enrique; Rinaudo, Marguerite; Villar, Marcelo Armando
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In this work, three methods (ethanol, HCl, and CaCl2 routes) of sodium alginate extraction–purification from brown seaweeds (Macrocystis pyrifera) were used in order to study the influence of process conditions on final properties of the polymer. In the CaCl2 route, was found that the precipitation step in presence of calcium ions followed by proton-exchange in acid medium clearly gives alginates with the lowest molecular weight and poor mechanical properties. It is well known that the acid treatment degrade the ether bonds on the polymeric chain. Ethanol route displayed the best performance, where the highest yield and rheological properties were attained with the lowest number of steps. Although the polymer I.1 showed a molar mass and polydispersity index (Mw/Mn) similar to those of commercial sample, its mechanical properties were lower. This performance is related to the higher content of guluronic acid in the commercial alginate, which promotes amore successful calcium chelation.Moreover, the employment of pH 4 in the acid pre-treatment improved the yield of the ethanol route, avoiding the ether linkage hydrolysis. Therefore, samples I.2 and I.3 displayed a higher Mw and a narrower distribution of molecular weights than commercial sample, which gave a higher viscosity and better viscoelastic properties.
Fil: Gomez, Cesar Gerardo. 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: Perez, María Victoria. 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
Fil: Rinaudo, Marguerite. Universite Joseph Fourier. Observatoire de Grenoble; Francia
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
Materia
Alginates
Extraction Process
Polysaccharides
Uronic Acid
Biomaterials
Hydrogel
Macrocystis Pyrifera
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:11336/42687
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/42687
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Influence of the extraction–purification conditions on final properties of alginates obtained from brown algae (Macrocystis pyrifera)Gomez, Cesar GerardoPerez, María VictoriaLozano, Jorge EnriqueRinaudo, MargueriteVillar, Marcelo ArmandoAlginatesExtraction ProcessPolysaccharidesUronic AcidBiomaterialsHydrogelMacrocystis Pyriferahttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2In this work, three methods (ethanol, HCl, and CaCl2 routes) of sodium alginate extraction–purification from brown seaweeds (Macrocystis pyrifera) were used in order to study the influence of process conditions on final properties of the polymer. In the CaCl2 route, was found that the precipitation step in presence of calcium ions followed by proton-exchange in acid medium clearly gives alginates with the lowest molecular weight and poor mechanical properties. It is well known that the acid treatment degrade the ether bonds on the polymeric chain. Ethanol route displayed the best performance, where the highest yield and rheological properties were attained with the lowest number of steps. Although the polymer I.1 showed a molar mass and polydispersity index (Mw/Mn) similar to those of commercial sample, its mechanical properties were lower. This performance is related to the higher content of guluronic acid in the commercial alginate, which promotes amore successful calcium chelation.Moreover, the employment of pH 4 in the acid pre-treatment improved the yield of the ethanol route, avoiding the ether linkage hydrolysis. Therefore, samples I.2 and I.3 displayed a higher Mw and a narrower distribution of molecular weights than commercial sample, which gave a higher viscosity and better viscoelastic properties.Fil: Gomez, Cesar Gerardo. 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: Perez, María Victoria. 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; ArgentinaFil: Rinaudo, Marguerite. Universite Joseph Fourier. Observatoire de Grenoble; FranciaFil: 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; ArgentinaElsevier Science2009-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/42687Gomez, Cesar Gerardo; Perez, María Victoria; Lozano, Jorge Enrique; Rinaudo, Marguerite; Villar, Marcelo Armando; Influence of the extraction–purification conditions on final properties of alginates obtained from brown algae (Macrocystis pyrifera); Elsevier Science; International Journal of Biological Macromolecules; 44; 4; 3-2009; 365-3710141-8130CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.ijbiomac.2009.02.005info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0141813009000397info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:11:56Zoai:ri.conicet.gov.ar:11336/42687instacron: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:34982025-09-03 10:11:56.552CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Influence of the extraction–purification conditions on final properties of alginates obtained from brown algae (Macrocystis pyrifera)
title Influence of the extraction–purification conditions on final properties of alginates obtained from brown algae (Macrocystis pyrifera)
spellingShingle Influence of the extraction–purification conditions on final properties of alginates obtained from brown algae (Macrocystis pyrifera)
Gomez, Cesar Gerardo
Alginates
Extraction Process
Polysaccharides
Uronic Acid
Biomaterials
Hydrogel
Macrocystis Pyrifera
title_short Influence of the extraction–purification conditions on final properties of alginates obtained from brown algae (Macrocystis pyrifera)
title_full Influence of the extraction–purification conditions on final properties of alginates obtained from brown algae (Macrocystis pyrifera)
title_fullStr Influence of the extraction–purification conditions on final properties of alginates obtained from brown algae (Macrocystis pyrifera)
title_full_unstemmed Influence of the extraction–purification conditions on final properties of alginates obtained from brown algae (Macrocystis pyrifera)
title_sort Influence of the extraction–purification conditions on final properties of alginates obtained from brown algae (Macrocystis pyrifera)
dc.creator.none.fl_str_mv Gomez, Cesar Gerardo
Perez, María Victoria
Lozano, Jorge Enrique
Rinaudo, Marguerite
Villar, Marcelo Armando
author Gomez, Cesar Gerardo
author_facet Gomez, Cesar Gerardo
Perez, María Victoria
Lozano, Jorge Enrique
Rinaudo, Marguerite
Villar, Marcelo Armando
author_role author
author2 Perez, María Victoria
Lozano, Jorge Enrique
Rinaudo, Marguerite
Villar, Marcelo Armando
author2_role author
author
author
author
dc.subject.none.fl_str_mv Alginates
Extraction Process
Polysaccharides
Uronic Acid
Biomaterials
Hydrogel
Macrocystis Pyrifera
topic Alginates
Extraction Process
Polysaccharides
Uronic Acid
Biomaterials
Hydrogel
Macrocystis Pyrifera
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv In this work, three methods (ethanol, HCl, and CaCl2 routes) of sodium alginate extraction–purification from brown seaweeds (Macrocystis pyrifera) were used in order to study the influence of process conditions on final properties of the polymer. In the CaCl2 route, was found that the precipitation step in presence of calcium ions followed by proton-exchange in acid medium clearly gives alginates with the lowest molecular weight and poor mechanical properties. It is well known that the acid treatment degrade the ether bonds on the polymeric chain. Ethanol route displayed the best performance, where the highest yield and rheological properties were attained with the lowest number of steps. Although the polymer I.1 showed a molar mass and polydispersity index (Mw/Mn) similar to those of commercial sample, its mechanical properties were lower. This performance is related to the higher content of guluronic acid in the commercial alginate, which promotes amore successful calcium chelation.Moreover, the employment of pH 4 in the acid pre-treatment improved the yield of the ethanol route, avoiding the ether linkage hydrolysis. Therefore, samples I.2 and I.3 displayed a higher Mw and a narrower distribution of molecular weights than commercial sample, which gave a higher viscosity and better viscoelastic properties.
Fil: Gomez, Cesar Gerardo. 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: Perez, María Victoria. 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
Fil: Rinaudo, Marguerite. Universite Joseph Fourier. Observatoire de Grenoble; Francia
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
description In this work, three methods (ethanol, HCl, and CaCl2 routes) of sodium alginate extraction–purification from brown seaweeds (Macrocystis pyrifera) were used in order to study the influence of process conditions on final properties of the polymer. In the CaCl2 route, was found that the precipitation step in presence of calcium ions followed by proton-exchange in acid medium clearly gives alginates with the lowest molecular weight and poor mechanical properties. It is well known that the acid treatment degrade the ether bonds on the polymeric chain. Ethanol route displayed the best performance, where the highest yield and rheological properties were attained with the lowest number of steps. Although the polymer I.1 showed a molar mass and polydispersity index (Mw/Mn) similar to those of commercial sample, its mechanical properties were lower. This performance is related to the higher content of guluronic acid in the commercial alginate, which promotes amore successful calcium chelation.Moreover, the employment of pH 4 in the acid pre-treatment improved the yield of the ethanol route, avoiding the ether linkage hydrolysis. Therefore, samples I.2 and I.3 displayed a higher Mw and a narrower distribution of molecular weights than commercial sample, which gave a higher viscosity and better viscoelastic properties.
publishDate 2009
dc.date.none.fl_str_mv 2009-03
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/11336/42687
Gomez, Cesar Gerardo; Perez, María Victoria; Lozano, Jorge Enrique; Rinaudo, Marguerite; Villar, Marcelo Armando; Influence of the extraction–purification conditions on final properties of alginates obtained from brown algae (Macrocystis pyrifera); Elsevier Science; International Journal of Biological Macromolecules; 44; 4; 3-2009; 365-371
0141-8130
CONICET Digital
CONICET
url http://hdl.handle.net/11336/42687
identifier_str_mv Gomez, Cesar Gerardo; Perez, María Victoria; Lozano, Jorge Enrique; Rinaudo, Marguerite; Villar, Marcelo Armando; Influence of the extraction–purification conditions on final properties of alginates obtained from brown algae (Macrocystis pyrifera); Elsevier Science; International Journal of Biological Macromolecules; 44; 4; 3-2009; 365-371
0141-8130
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ijbiomac.2009.02.005
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0141813009000397
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
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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 13.13397

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