Development and characterization of hydrogels based on natural polysaccharides : policaju and chitosan

Detalhes bibliográficos
Autor(a) principal: Soares, Paulo A. G.
Data de Publicação: 2014
Outros Autores: Bourbon, A. I., Vicente, A. A., Andrade, Cesar A. S., Barros Junior, Wilson, Correia, Maria T. S., Pessoa Júnior, Adalberto, Cunha, Maria G. Carneiro da
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/31802
Resumo: The development of hydrogels based on natural polysaccharides was investigated by preparing mixtures of policaju/chitosan at weight ratios of 1:4 and 2:3. Utilizing dynamic light scattering (DLS) techniques for these mixtures, an increase on the hydrodynamic particle radius was observed varying their pH from 3.0 to 12.0. Furthermore, a reduction of ζ-potential was also observed for the same pH interval. Following rounds of drying/hydration cycles at a specific pH value, hydrogel matrices were formed. The pore size distribution of these formed hydrogels was examined using scanning electron microscopy. Further FT-IR analyses confirmed a physical interaction between the polysaccharides policaju and chitosan. Swelling experiments revealed water uptake values, after 24h of immersion in water, close to 270% for 1:4, and 320% for 2:3 hydrogels. Finally, rheological measurements were then conducted in order to confirm hydrogel viscoelastic features. These results indicate a promising road to biomaterials fabrication and biomedical applications. Copyright © 2014 Elsevier B.V. All rights reserved.
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spelling Development and characterization of hydrogels based on natural polysaccharides : policaju and chitosanChitosanHydrogel characterizationPolicajuRheologyScience & TechnologyThe development of hydrogels based on natural polysaccharides was investigated by preparing mixtures of policaju/chitosan at weight ratios of 1:4 and 2:3. Utilizing dynamic light scattering (DLS) techniques for these mixtures, an increase on the hydrodynamic particle radius was observed varying their pH from 3.0 to 12.0. Furthermore, a reduction of ζ-potential was also observed for the same pH interval. Following rounds of drying/hydration cycles at a specific pH value, hydrogel matrices were formed. The pore size distribution of these formed hydrogels was examined using scanning electron microscopy. Further FT-IR analyses confirmed a physical interaction between the polysaccharides policaju and chitosan. Swelling experiments revealed water uptake values, after 24h of immersion in water, close to 270% for 1:4, and 320% for 2:3 hydrogels. Finally, rheological measurements were then conducted in order to confirm hydrogel viscoelastic features. These results indicate a promising road to biomaterials fabrication and biomedical applications. Copyright © 2014 Elsevier B.V. All rights reserved.Paulo A.G. Soares is a recipient of a scholarship from Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) and the author Ana I. Bourbon is a recipient of a fellowship from the Fundacao para a Ciencia e Tecnologia, POPH-QREN and FSE (FCT, Portugal) through grant SFRH/BD/73178/2010. Maria G. Carneiro-da-Cunha, Maria T.S. Correia, Cesar AS, Andrade and Adalberto Pessoa Jr express their gratitude to the Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) for research grants. The authors are grateful to the Centro de Tecnologias Estrategicas do Nordeste (CETENE) of the Ministerio da Ciencia e Tecnologia for technical assistance and the Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES/PROCAD) for financial supportElsevier B.V.Universidade do MinhoSoares, Paulo A. G.Bourbon, A. I.Vicente, A. A.Andrade, Cesar A. S.Barros Junior, WilsonCorreia, Maria T. S.Pessoa Júnior, AdalbertoCunha, Maria G. Carneiro da20142014-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/31802engSoares, Paulo A.G.; Bourbon, A.I.; Vicente, A.A.; Andrade, Cesar A.S.; Barros Jr., Wilson; Correia, Maria T.S.; Pessoa Jr., Adalberto; Carneiro-da-Cunha, Maria G. Development and characterization of hydrogels based on natural polysaccharides: Policaju and chitosan Materials Science and Engineering: C 42() 219-226, 2014.0928-493110.1016/j.msec.2014.05.00925063113info: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:RCAAP2023-07-21T12:50:58Zoai:repositorium.sdum.uminho.pt:1822/31802Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:49:44.590293Repositório 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 Development and characterization of hydrogels based on natural polysaccharides : policaju and chitosan
title Development and characterization of hydrogels based on natural polysaccharides : policaju and chitosan
spellingShingle Development and characterization of hydrogels based on natural polysaccharides : policaju and chitosan
Soares, Paulo A. G.
Chitosan
Hydrogel characterization
Policaju
Rheology
Science & Technology
title_short Development and characterization of hydrogels based on natural polysaccharides : policaju and chitosan
title_full Development and characterization of hydrogels based on natural polysaccharides : policaju and chitosan
title_fullStr Development and characterization of hydrogels based on natural polysaccharides : policaju and chitosan
title_full_unstemmed Development and characterization of hydrogels based on natural polysaccharides : policaju and chitosan
title_sort Development and characterization of hydrogels based on natural polysaccharides : policaju and chitosan
author Soares, Paulo A. G.
author_facet Soares, Paulo A. G.
Bourbon, A. I.
Vicente, A. A.
Andrade, Cesar A. S.
Barros Junior, Wilson
Correia, Maria T. S.
Pessoa Júnior, Adalberto
Cunha, Maria G. Carneiro da
author_role author
author2 Bourbon, A. I.
Vicente, A. A.
Andrade, Cesar A. S.
Barros Junior, Wilson
Correia, Maria T. S.
Pessoa Júnior, Adalberto
Cunha, Maria G. Carneiro da
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Soares, Paulo A. G.
Bourbon, A. I.
Vicente, A. A.
Andrade, Cesar A. S.
Barros Junior, Wilson
Correia, Maria T. S.
Pessoa Júnior, Adalberto
Cunha, Maria G. Carneiro da
dc.subject.por.fl_str_mv Chitosan
Hydrogel characterization
Policaju
Rheology
Science & Technology
topic Chitosan
Hydrogel characterization
Policaju
Rheology
Science & Technology
description The development of hydrogels based on natural polysaccharides was investigated by preparing mixtures of policaju/chitosan at weight ratios of 1:4 and 2:3. Utilizing dynamic light scattering (DLS) techniques for these mixtures, an increase on the hydrodynamic particle radius was observed varying their pH from 3.0 to 12.0. Furthermore, a reduction of ζ-potential was also observed for the same pH interval. Following rounds of drying/hydration cycles at a specific pH value, hydrogel matrices were formed. The pore size distribution of these formed hydrogels was examined using scanning electron microscopy. Further FT-IR analyses confirmed a physical interaction between the polysaccharides policaju and chitosan. Swelling experiments revealed water uptake values, after 24h of immersion in water, close to 270% for 1:4, and 320% for 2:3 hydrogels. Finally, rheological measurements were then conducted in order to confirm hydrogel viscoelastic features. These results indicate a promising road to biomaterials fabrication and biomedical applications. Copyright © 2014 Elsevier B.V. All rights reserved.
publishDate 2014
dc.date.none.fl_str_mv 2014
2014-01-01T00:00:00Z
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/1822/31802
url http://hdl.handle.net/1822/31802
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Soares, Paulo A.G.; Bourbon, A.I.; Vicente, A.A.; Andrade, Cesar A.S.; Barros Jr., Wilson; Correia, Maria T.S.; Pessoa Jr., Adalberto; Carneiro-da-Cunha, Maria G. Development and characterization of hydrogels based on natural polysaccharides: Policaju and chitosan Materials Science and Engineering: C 42() 219-226, 2014.
0928-4931
10.1016/j.msec.2014.05.009
25063113
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
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
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collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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