The effect of the annealing on the poly(vinyl alcohol) obtained by freezing-thawing

Autores
Gonzalez, Jimena Soledad; Alvarez, Vera Alejandra
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In the present work poly(vinyl alcohol) (PVA) hydrogels were obtained by freezing/thawing technique. The effect of thermal treatment on its performance was studied by annealing the hydrogels at five different temperatures, all of them between the water evaporation and the polymer melting ones, for 1 h. The main characteristics of hydrogels (glass transition temperature, crystallinity degree, equilibrium swelling degree, bound water content, gel fraction, water vapour transmission rate and diffusion exponent) were determined and the effect of annealing temperature was analyzed. Two different solution concentrations (5 and 10 wt.% of PVA) were used to prepare the hydrogels. It was clearly demonstrated that the studied properties markedly changed as a function of annealing temperature: the maximum swelling degree, the thickness change and the bound water content decreased whereas the gel fraction increased when annealing temperature was raised. An exponential relationship between gel fraction and crystallinity degree was found and the characteristics of hydrogels were correlated with both parameters. © 2011 Elsevier B.V. All Reserved rights.
Fil: Gonzalez, Jimena Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Fil: Alvarez, Vera Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Materia
Annealing
Freezing-Thawing
Hydrogel
Poly(Vinyl Alcohol)
Thermal Treatment
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:11336/79018
Acceder
id CONICETDig_cbae378ee7da36219821fc22a1f8a140
oai_identifier_str oai:ri.conicet.gov.ar:11336/79018
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The effect of the annealing on the poly(vinyl alcohol) obtained by freezing-thawingGonzalez, Jimena SoledadAlvarez, Vera AlejandraAnnealingFreezing-ThawingHydrogelPoly(Vinyl Alcohol)Thermal Treatmenthttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1https://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2In the present work poly(vinyl alcohol) (PVA) hydrogels were obtained by freezing/thawing technique. The effect of thermal treatment on its performance was studied by annealing the hydrogels at five different temperatures, all of them between the water evaporation and the polymer melting ones, for 1 h. The main characteristics of hydrogels (glass transition temperature, crystallinity degree, equilibrium swelling degree, bound water content, gel fraction, water vapour transmission rate and diffusion exponent) were determined and the effect of annealing temperature was analyzed. Two different solution concentrations (5 and 10 wt.% of PVA) were used to prepare the hydrogels. It was clearly demonstrated that the studied properties markedly changed as a function of annealing temperature: the maximum swelling degree, the thickness change and the bound water content decreased whereas the gel fraction increased when annealing temperature was raised. An exponential relationship between gel fraction and crystallinity degree was found and the characteristics of hydrogels were correlated with both parameters. © 2011 Elsevier B.V. All Reserved rights.Fil: Gonzalez, Jimena Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaFil: Alvarez, Vera Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; ArgentinaElsevier Science2011-07-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/79018Gonzalez, Jimena Soledad; Alvarez, Vera Alejandra; The effect of the annealing on the poly(vinyl alcohol) obtained by freezing-thawing; Elsevier Science; Thermochimica Acta; 521; 1-2; 30-7-2011; 184-1900040-6031CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0040603111002516info:eu-repo/semantics/altIdentifier/doi/10.1016/j.tca.2011.04.022info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:51:16Zoai:ri.conicet.gov.ar:11336/79018instacron: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 09:51:16.917CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The effect of the annealing on the poly(vinyl alcohol) obtained by freezing-thawing
title The effect of the annealing on the poly(vinyl alcohol) obtained by freezing-thawing
spellingShingle The effect of the annealing on the poly(vinyl alcohol) obtained by freezing-thawing
Gonzalez, Jimena Soledad
Annealing
Freezing-Thawing
Hydrogel
Poly(Vinyl Alcohol)
Thermal Treatment
title_short The effect of the annealing on the poly(vinyl alcohol) obtained by freezing-thawing
title_full The effect of the annealing on the poly(vinyl alcohol) obtained by freezing-thawing
title_fullStr The effect of the annealing on the poly(vinyl alcohol) obtained by freezing-thawing
title_full_unstemmed The effect of the annealing on the poly(vinyl alcohol) obtained by freezing-thawing
title_sort The effect of the annealing on the poly(vinyl alcohol) obtained by freezing-thawing
dc.creator.none.fl_str_mv Gonzalez, Jimena Soledad
Alvarez, Vera Alejandra
author Gonzalez, Jimena Soledad
author_facet Gonzalez, Jimena Soledad
Alvarez, Vera Alejandra
author_role author
author2 Alvarez, Vera Alejandra
author2_role author
dc.subject.none.fl_str_mv Annealing
Freezing-Thawing
Hydrogel
Poly(Vinyl Alcohol)
Thermal Treatment
topic Annealing
Freezing-Thawing
Hydrogel
Poly(Vinyl Alcohol)
Thermal Treatment
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv In the present work poly(vinyl alcohol) (PVA) hydrogels were obtained by freezing/thawing technique. The effect of thermal treatment on its performance was studied by annealing the hydrogels at five different temperatures, all of them between the water evaporation and the polymer melting ones, for 1 h. The main characteristics of hydrogels (glass transition temperature, crystallinity degree, equilibrium swelling degree, bound water content, gel fraction, water vapour transmission rate and diffusion exponent) were determined and the effect of annealing temperature was analyzed. Two different solution concentrations (5 and 10 wt.% of PVA) were used to prepare the hydrogels. It was clearly demonstrated that the studied properties markedly changed as a function of annealing temperature: the maximum swelling degree, the thickness change and the bound water content decreased whereas the gel fraction increased when annealing temperature was raised. An exponential relationship between gel fraction and crystallinity degree was found and the characteristics of hydrogels were correlated with both parameters. © 2011 Elsevier B.V. All Reserved rights.
Fil: Gonzalez, Jimena Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Fil: Alvarez, Vera Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
description In the present work poly(vinyl alcohol) (PVA) hydrogels were obtained by freezing/thawing technique. The effect of thermal treatment on its performance was studied by annealing the hydrogels at five different temperatures, all of them between the water evaporation and the polymer melting ones, for 1 h. The main characteristics of hydrogels (glass transition temperature, crystallinity degree, equilibrium swelling degree, bound water content, gel fraction, water vapour transmission rate and diffusion exponent) were determined and the effect of annealing temperature was analyzed. Two different solution concentrations (5 and 10 wt.% of PVA) were used to prepare the hydrogels. It was clearly demonstrated that the studied properties markedly changed as a function of annealing temperature: the maximum swelling degree, the thickness change and the bound water content decreased whereas the gel fraction increased when annealing temperature was raised. An exponential relationship between gel fraction and crystallinity degree was found and the characteristics of hydrogels were correlated with both parameters. © 2011 Elsevier B.V. All Reserved rights.
publishDate 2011
dc.date.none.fl_str_mv 2011-07-30
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/11336/79018
Gonzalez, Jimena Soledad; Alvarez, Vera Alejandra; The effect of the annealing on the poly(vinyl alcohol) obtained by freezing-thawing; Elsevier Science; Thermochimica Acta; 521; 1-2; 30-7-2011; 184-190
0040-6031
CONICET Digital
CONICET
url http://hdl.handle.net/11336/79018
identifier_str_mv Gonzalez, Jimena Soledad; Alvarez, Vera Alejandra; The effect of the annealing on the poly(vinyl alcohol) obtained by freezing-thawing; Elsevier Science; Thermochimica Acta; 521; 1-2; 30-7-2011; 184-190
0040-6031
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.sciencedirect.com/science/article/pii/S0040603111002516
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.tca.2011.04.022
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
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
_version_ 1842269084790554624
score 13.13397

Publicaciones similares