Layer-by-layer assembly of food-grade alginate/chitosan nanolaminates: formation and physicochemical characterization

The alternate deposition of oppositely charged materials (layer-by-layer technique) is an effective approach to functionalize materials. Biopolymer-based nanolaminates obtained by the layer-by-layer technique can also be used to change the surface properties of food products or food contact material...

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Autores: Acevedo Fani, Alejandra, Salvia Trujillo, Laura, Soliva-Fortuny, Robert, Martín Belloso, Olga
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2017
País:España
Institución:Universitat de Lleida (UdL)
Repositorio:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/69387
Acceso en línea:https://doi.org/10.1007/s11483-017-9486-3
http://hdl.handle.net/10459.1/69387
Access Level:acceso abierto
Palabra clave:Alginate
Chitosan
Layer-by-layer
Nanolaminates, food-grade coatings and films
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spelling Layer-by-layer assembly of food-grade alginate/chitosan nanolaminates: formation and physicochemical characterizationAcevedo Fani, AlejandraSalvia Trujillo, LauraSoliva-Fortuny, RobertMartín Belloso, OlgaAlginateChitosanLayer-by-layerNanolaminates, food-grade coatings and filmsThe alternate deposition of oppositely charged materials (layer-by-layer technique) is an effective approach to functionalize materials. Biopolymer-based nanolaminates obtained by the layer-by-layer technique can also be used to change the surface properties of food products or food contact materials. However, the final properties of nanolaminates may be affected by the conditions of the adsorbing solutions. The objective of this study was to form and characterize the physicochemical properties of nanolaminates assembled from alginate and chitosan solutions. The effect of pH, ionic strength and polysaccharide concentration on the properties of the adsorbing solutions was also evaluated. The ζ-potential, viscosity and whiteness index of the solutions were assessed before the assembly. Alginate/chitosan nanolaminates were characterized in terms of UV-visible spectroscopy, surface ζ-potential, contact angle, DSC analysis and SEM. The absorbance increased as a function of the number of polysaccharide layers on the substrate, suggesting an increase in the mass adsorbed. The surface ζ-potential of nanolaminates changed depending on the last polysaccharide deposited. Alginate layers were negatively charged, whereas chitosan layers were positively charged. Contact angles obtained in alginate layers were ≈ 10°, being mostly hydrophilic. Chitosan layers showed higher contact angle values (80°), indicating a more hydrophobic behavior. Microscopic examinations revealed the presence densely packed structures that corresponded to alginate/chitosan nanolaminates, having an estimated thickness of 700 nm. The results obtained in this work lay the basis for the rational design of polysaccharide-based nanolaminates in the food sector.This research was supported by the Ministerio de Ciencia e Innovación (Spain) (project AGL2009-11475). Author Acevedo-Fani also thanks to the University of Lleida for the pre-doctoral grant.Springer Science+Business Media New York2017info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://doi.org/10.1007/s11483-017-9486-3http://hdl.handle.net/10459.1/69387reponame:Repositori Obert UdL instname:Universitat de Lleida (UdL)Inglésinfo:eu-repo/grantAgreement/MICINN//AGL2009-11475Versió postprint del document publicat a: https://doi.org/10.1007/s11483-017-9486-3Food Biophysics, 2017, vol. 12, num. 3, p. 299-308(c) Springer Science+Business Media New York, 2017info:eu-repo/semantics/openAccessoai:repositori.udl.cat:10459.1/693872026-06-24T12:42:17Z
dc.title.none.fl_str_mv Layer-by-layer assembly of food-grade alginate/chitosan nanolaminates: formation and physicochemical characterization
title Layer-by-layer assembly of food-grade alginate/chitosan nanolaminates: formation and physicochemical characterization
spellingShingle Layer-by-layer assembly of food-grade alginate/chitosan nanolaminates: formation and physicochemical characterization
Acevedo Fani, Alejandra
Alginate
Chitosan
Layer-by-layer
Nanolaminates, food-grade coatings and films
title_short Layer-by-layer assembly of food-grade alginate/chitosan nanolaminates: formation and physicochemical characterization
title_full Layer-by-layer assembly of food-grade alginate/chitosan nanolaminates: formation and physicochemical characterization
title_fullStr Layer-by-layer assembly of food-grade alginate/chitosan nanolaminates: formation and physicochemical characterization
title_full_unstemmed Layer-by-layer assembly of food-grade alginate/chitosan nanolaminates: formation and physicochemical characterization
title_sort Layer-by-layer assembly of food-grade alginate/chitosan nanolaminates: formation and physicochemical characterization
dc.creator.none.fl_str_mv Acevedo Fani, Alejandra
Salvia Trujillo, Laura
Soliva-Fortuny, Robert
Martín Belloso, Olga
author Acevedo Fani, Alejandra
author_facet Acevedo Fani, Alejandra
Salvia Trujillo, Laura
Soliva-Fortuny, Robert
Martín Belloso, Olga
author_role author
author2 Salvia Trujillo, Laura
Soliva-Fortuny, Robert
Martín Belloso, Olga
author2_role author
author
author
dc.subject.none.fl_str_mv Alginate
Chitosan
Layer-by-layer
Nanolaminates, food-grade coatings and films
topic Alginate
Chitosan
Layer-by-layer
Nanolaminates, food-grade coatings and films
description The alternate deposition of oppositely charged materials (layer-by-layer technique) is an effective approach to functionalize materials. Biopolymer-based nanolaminates obtained by the layer-by-layer technique can also be used to change the surface properties of food products or food contact materials. However, the final properties of nanolaminates may be affected by the conditions of the adsorbing solutions. The objective of this study was to form and characterize the physicochemical properties of nanolaminates assembled from alginate and chitosan solutions. The effect of pH, ionic strength and polysaccharide concentration on the properties of the adsorbing solutions was also evaluated. The ζ-potential, viscosity and whiteness index of the solutions were assessed before the assembly. Alginate/chitosan nanolaminates were characterized in terms of UV-visible spectroscopy, surface ζ-potential, contact angle, DSC analysis and SEM. The absorbance increased as a function of the number of polysaccharide layers on the substrate, suggesting an increase in the mass adsorbed. The surface ζ-potential of nanolaminates changed depending on the last polysaccharide deposited. Alginate layers were negatively charged, whereas chitosan layers were positively charged. Contact angles obtained in alginate layers were ≈ 10°, being mostly hydrophilic. Chitosan layers showed higher contact angle values (80°), indicating a more hydrophobic behavior. Microscopic examinations revealed the presence densely packed structures that corresponded to alginate/chitosan nanolaminates, having an estimated thickness of 700 nm. The results obtained in this work lay the basis for the rational design of polysaccharide-based nanolaminates in the food sector.
publishDate 2017
dc.date.none.fl_str_mv 2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1007/s11483-017-9486-3
http://hdl.handle.net/10459.1/69387
url https://doi.org/10.1007/s11483-017-9486-3
http://hdl.handle.net/10459.1/69387
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MICINN//AGL2009-11475
Versió postprint del document publicat a: https://doi.org/10.1007/s11483-017-9486-3
Food Biophysics, 2017, vol. 12, num. 3, p. 299-308
dc.rights.none.fl_str_mv (c) Springer Science+Business Media New York, 2017
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Springer Science+Business Media New York, 2017
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer Science+Business Media New York
publisher.none.fl_str_mv Springer Science+Business Media New York
dc.source.none.fl_str_mv reponame:Repositori Obert UdL
instname:Universitat de Lleida (UdL)
instname_str Universitat de Lleida (UdL)
reponame_str Repositori Obert UdL
collection Repositori Obert UdL
repository.name.fl_str_mv
repository.mail.fl_str_mv
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