Polyvinyl alcohol-polyethylenglycol blends with tungstophosphoric acid addition: Synthesis and characterization

Autores
Monopoli, Víctor D.; Pizzio, Luis Rene; Blanco, Mirta Noemi
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
New materials, based on a Keggin-structured compound (tungstophosphoric acid) immobilized in a polymeric matrix formed by a blend of polyvinyl alcohol and polyethylenglycol with 400, 2000, and 6000 Da molecular weight, were prepared and characterized. Hydrogels with physical type links were produced, using the freezing-thawing technique, and are an alternative to the matrices traditionally obtained by developing chemical links by the use of cross-linkers. The supported tungstophosphoric acid retained its Keggin primary structure intact. There is evidence of a heteropolyacid-polymeric matrix interaction, which could occur between the [PW12O40]3- Keggin anions and protonated hydroxyl groups C-OH2 + of the support. An effective immobilization was achieved, because there was no anion solubilization when the materials were put in contact with toluene at reflux. By differential scanning calorimetry and thermogravimetrical analysis, it was observed that the materials containing tungstophosphoric acid can be used as catalysts in reactions carried out at temperatures lower than 160-200 °C, without degradation of the solids, the temperature being dependent on the tungstophosphoric acid content and, at a lesser extent, on the polyethylenglycol molecular weight.
Fil: Monopoli, Víctor D.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Pizzio, Luis Rene. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Blanco, Mirta Noemi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Materia
Freezing-Thawing
Polyethylenglycol
Polyvinyl Alcohol
Tungstophosphoric Acid
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/54008
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Polyvinyl alcohol-polyethylenglycol blends with tungstophosphoric acid addition: Synthesis and characterizationMonopoli, Víctor D.Pizzio, Luis ReneBlanco, Mirta NoemiFreezing-ThawingPolyethylenglycolPolyvinyl AlcoholTungstophosphoric Acidhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2New materials, based on a Keggin-structured compound (tungstophosphoric acid) immobilized in a polymeric matrix formed by a blend of polyvinyl alcohol and polyethylenglycol with 400, 2000, and 6000 Da molecular weight, were prepared and characterized. Hydrogels with physical type links were produced, using the freezing-thawing technique, and are an alternative to the matrices traditionally obtained by developing chemical links by the use of cross-linkers. The supported tungstophosphoric acid retained its Keggin primary structure intact. There is evidence of a heteropolyacid-polymeric matrix interaction, which could occur between the [PW12O40]3- Keggin anions and protonated hydroxyl groups C-OH2 + of the support. An effective immobilization was achieved, because there was no anion solubilization when the materials were put in contact with toluene at reflux. By differential scanning calorimetry and thermogravimetrical analysis, it was observed that the materials containing tungstophosphoric acid can be used as catalysts in reactions carried out at temperatures lower than 160-200 °C, without degradation of the solids, the temperature being dependent on the tungstophosphoric acid content and, at a lesser extent, on the polyethylenglycol molecular weight.Fil: Monopoli, Víctor D.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; ArgentinaFil: Pizzio, Luis Rene. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; ArgentinaFil: Blanco, Mirta Noemi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; ArgentinaElsevier Science Sa2008-04info: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/11336/54008Monopoli, Víctor D.; Pizzio, Luis Rene; Blanco, Mirta Noemi; Polyvinyl alcohol-polyethylenglycol blends with tungstophosphoric acid addition: Synthesis and characterization; Elsevier Science Sa; Materials Chemistry and Physics; 108; 2-3; 4-2008; 331-3360254-0584CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.matchemphys.2007.09.042info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0254058407006116info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:51:02Zoai:ri.conicet.gov.ar:11336/54008instacron: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 09:51:02.869CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Polyvinyl alcohol-polyethylenglycol blends with tungstophosphoric acid addition: Synthesis and characterization
title Polyvinyl alcohol-polyethylenglycol blends with tungstophosphoric acid addition: Synthesis and characterization
spellingShingle Polyvinyl alcohol-polyethylenglycol blends with tungstophosphoric acid addition: Synthesis and characterization
Monopoli, Víctor D.
Freezing-Thawing
Polyethylenglycol
Polyvinyl Alcohol
Tungstophosphoric Acid
title_short Polyvinyl alcohol-polyethylenglycol blends with tungstophosphoric acid addition: Synthesis and characterization
title_full Polyvinyl alcohol-polyethylenglycol blends with tungstophosphoric acid addition: Synthesis and characterization
title_fullStr Polyvinyl alcohol-polyethylenglycol blends with tungstophosphoric acid addition: Synthesis and characterization
title_full_unstemmed Polyvinyl alcohol-polyethylenglycol blends with tungstophosphoric acid addition: Synthesis and characterization
title_sort Polyvinyl alcohol-polyethylenglycol blends with tungstophosphoric acid addition: Synthesis and characterization
dc.creator.none.fl_str_mv Monopoli, Víctor D.
Pizzio, Luis Rene
Blanco, Mirta Noemi
author Monopoli, Víctor D.
author_facet Monopoli, Víctor D.
Pizzio, Luis Rene
Blanco, Mirta Noemi
author_role author
author2 Pizzio, Luis Rene
Blanco, Mirta Noemi
author2_role author
author
dc.subject.none.fl_str_mv Freezing-Thawing
Polyethylenglycol
Polyvinyl Alcohol
Tungstophosphoric Acid
topic Freezing-Thawing
Polyethylenglycol
Polyvinyl Alcohol
Tungstophosphoric Acid
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv New materials, based on a Keggin-structured compound (tungstophosphoric acid) immobilized in a polymeric matrix formed by a blend of polyvinyl alcohol and polyethylenglycol with 400, 2000, and 6000 Da molecular weight, were prepared and characterized. Hydrogels with physical type links were produced, using the freezing-thawing technique, and are an alternative to the matrices traditionally obtained by developing chemical links by the use of cross-linkers. The supported tungstophosphoric acid retained its Keggin primary structure intact. There is evidence of a heteropolyacid-polymeric matrix interaction, which could occur between the [PW12O40]3- Keggin anions and protonated hydroxyl groups C-OH2 + of the support. An effective immobilization was achieved, because there was no anion solubilization when the materials were put in contact with toluene at reflux. By differential scanning calorimetry and thermogravimetrical analysis, it was observed that the materials containing tungstophosphoric acid can be used as catalysts in reactions carried out at temperatures lower than 160-200 °C, without degradation of the solids, the temperature being dependent on the tungstophosphoric acid content and, at a lesser extent, on the polyethylenglycol molecular weight.
Fil: Monopoli, Víctor D.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Pizzio, Luis Rene. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
Fil: Blanco, Mirta Noemi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina
description New materials, based on a Keggin-structured compound (tungstophosphoric acid) immobilized in a polymeric matrix formed by a blend of polyvinyl alcohol and polyethylenglycol with 400, 2000, and 6000 Da molecular weight, were prepared and characterized. Hydrogels with physical type links were produced, using the freezing-thawing technique, and are an alternative to the matrices traditionally obtained by developing chemical links by the use of cross-linkers. The supported tungstophosphoric acid retained its Keggin primary structure intact. There is evidence of a heteropolyacid-polymeric matrix interaction, which could occur between the [PW12O40]3- Keggin anions and protonated hydroxyl groups C-OH2 + of the support. An effective immobilization was achieved, because there was no anion solubilization when the materials were put in contact with toluene at reflux. By differential scanning calorimetry and thermogravimetrical analysis, it was observed that the materials containing tungstophosphoric acid can be used as catalysts in reactions carried out at temperatures lower than 160-200 °C, without degradation of the solids, the temperature being dependent on the tungstophosphoric acid content and, at a lesser extent, on the polyethylenglycol molecular weight.
publishDate 2008
dc.date.none.fl_str_mv 2008-04
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/11336/54008
Monopoli, Víctor D.; Pizzio, Luis Rene; Blanco, Mirta Noemi; Polyvinyl alcohol-polyethylenglycol blends with tungstophosphoric acid addition: Synthesis and characterization; Elsevier Science Sa; Materials Chemistry and Physics; 108; 2-3; 4-2008; 331-336
0254-0584
CONICET Digital
CONICET
url http://hdl.handle.net/11336/54008
identifier_str_mv Monopoli, Víctor D.; Pizzio, Luis Rene; Blanco, Mirta Noemi; Polyvinyl alcohol-polyethylenglycol blends with tungstophosphoric acid addition: Synthesis and characterization; Elsevier Science Sa; Materials Chemistry and Physics; 108; 2-3; 4-2008; 331-336
0254-0584
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.matchemphys.2007.09.042
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0254058407006116
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science Sa
publisher.none.fl_str_mv Elsevier Science Sa
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_ 1842269069800112128
score 13.13397

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