Effect of an excess of polyelectrolyte on viscoelastic properties of suspensions of alumina and zircon mixtures

Autores
Garrido, Liliana Beatriz; Califano, Alicia Noemi
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Aqueous suspensions of alumina and zircon mixtures which are of practical interest in ceramics forming process were stabilized with an ammonium salt of a polycarboxilic acid as a dispersant (an anionic polyelectrolyte). Rheological properties of highly concentrated suspensions were determined by measuring shear viscosity and dynamic tests in the linear viscoelastic region. The effects of the degree of dispersion and solid volume fraction of the suspension φ{symbol} between 0.45 and 0.57 on dynamic viscoelastic properties were studied. Flow behavior of the suspensions changed from predominantly viscous to more elastic at a critical solid content φ{symbol}c, which depends on the polyelectrolyte addition. If a high amount of non-adsorbed polyelectrolyte was in solution, the suspension flocculated and exhibited a relatively low φ{symbol}c at which viscous to elastic transition occurred. The storage modulus reached a plateau in the high frequency region and gradually reduced at very low frequencies indicating a certain breakdown in the formed structure. The G′ at the plateau increased significantly with increasing φ{symbol}. Contrarily, heterocoagulated suspensions due to insufficient dispersant addition showed a predominant elastic behavior with viscoelastic parameters almost independent in the frequency region studied. Moreover, both moduli sharply increased with increasing φ{symbol} and achieved a magnitude of several orders higher than that of the flocculated suspension. Changes in the storage G′ and the loss G′ moduli due to the different additions of polyelectrolyte provided information about modifications on the suspension structure. © 2007 Elsevier B.V. All rights reserved.
Fil: Garrido, Liliana Beatriz. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Tecnología de Recursos Minerales y Cerámica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Tecnología de Recursos Minerales y Cerámica; Argentina
Fil: Califano, Alicia Noemi. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos; Argentina
Materia
ALUMINA
DISPERSANT
POLYELECTROLYTE
RHEOLOGY
VISCOELASTIC PROPERTIES
ZIRCON
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:11336/151822
Acceder
id CONICETDig_ecacd342fba4376964f06f297dafbcfe
oai_identifier_str oai:ri.conicet.gov.ar:11336/151822
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Effect of an excess of polyelectrolyte on viscoelastic properties of suspensions of alumina and zircon mixturesGarrido, Liliana BeatrizCalifano, Alicia NoemiALUMINADISPERSANTPOLYELECTROLYTERHEOLOGYVISCOELASTIC PROPERTIESZIRCONhttps://purl.org/becyt/ford/2.11https://purl.org/becyt/ford/2Aqueous suspensions of alumina and zircon mixtures which are of practical interest in ceramics forming process were stabilized with an ammonium salt of a polycarboxilic acid as a dispersant (an anionic polyelectrolyte). Rheological properties of highly concentrated suspensions were determined by measuring shear viscosity and dynamic tests in the linear viscoelastic region. The effects of the degree of dispersion and solid volume fraction of the suspension φ{symbol} between 0.45 and 0.57 on dynamic viscoelastic properties were studied. Flow behavior of the suspensions changed from predominantly viscous to more elastic at a critical solid content φ{symbol}c, which depends on the polyelectrolyte addition. If a high amount of non-adsorbed polyelectrolyte was in solution, the suspension flocculated and exhibited a relatively low φ{symbol}c at which viscous to elastic transition occurred. The storage modulus reached a plateau in the high frequency region and gradually reduced at very low frequencies indicating a certain breakdown in the formed structure. The G′ at the plateau increased significantly with increasing φ{symbol}. Contrarily, heterocoagulated suspensions due to insufficient dispersant addition showed a predominant elastic behavior with viscoelastic parameters almost independent in the frequency region studied. Moreover, both moduli sharply increased with increasing φ{symbol} and achieved a magnitude of several orders higher than that of the flocculated suspension. Changes in the storage G′ and the loss G′ moduli due to the different additions of polyelectrolyte provided information about modifications on the suspension structure. © 2007 Elsevier B.V. All rights reserved.Fil: Garrido, Liliana Beatriz. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Tecnología de Recursos Minerales y Cerámica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Tecnología de Recursos Minerales y Cerámica; ArgentinaFil: Califano, Alicia Noemi. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos; ArgentinaElsevier Science2007-07-20info: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/11336/151822Garrido, Liliana Beatriz; Califano, Alicia Noemi; Effect of an excess of polyelectrolyte on viscoelastic properties of suspensions of alumina and zircon mixtures; Elsevier Science; Colloids and Surfaces A: Physicochemical and Engineering Aspects; 302; 1-3; 20-7-2007; 24-300927-7757CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.colsurfa.2007.01.036info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:54:00Zoai:ri.conicet.gov.ar:11336/151822instacron: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:34982025-09-29 09:54:00.585CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Effect of an excess of polyelectrolyte on viscoelastic properties of suspensions of alumina and zircon mixtures
title Effect of an excess of polyelectrolyte on viscoelastic properties of suspensions of alumina and zircon mixtures
spellingShingle Effect of an excess of polyelectrolyte on viscoelastic properties of suspensions of alumina and zircon mixtures
Garrido, Liliana Beatriz
ALUMINA
DISPERSANT
POLYELECTROLYTE
RHEOLOGY
VISCOELASTIC PROPERTIES
ZIRCON
title_short Effect of an excess of polyelectrolyte on viscoelastic properties of suspensions of alumina and zircon mixtures
title_full Effect of an excess of polyelectrolyte on viscoelastic properties of suspensions of alumina and zircon mixtures
title_fullStr Effect of an excess of polyelectrolyte on viscoelastic properties of suspensions of alumina and zircon mixtures
title_full_unstemmed Effect of an excess of polyelectrolyte on viscoelastic properties of suspensions of alumina and zircon mixtures
title_sort Effect of an excess of polyelectrolyte on viscoelastic properties of suspensions of alumina and zircon mixtures
dc.creator.none.fl_str_mv Garrido, Liliana Beatriz
Califano, Alicia Noemi
author Garrido, Liliana Beatriz
author_facet Garrido, Liliana Beatriz
Califano, Alicia Noemi
author_role author
author2 Califano, Alicia Noemi
author2_role author
dc.subject.none.fl_str_mv ALUMINA
DISPERSANT
POLYELECTROLYTE
RHEOLOGY
VISCOELASTIC PROPERTIES
ZIRCON
topic ALUMINA
DISPERSANT
POLYELECTROLYTE
RHEOLOGY
VISCOELASTIC PROPERTIES
ZIRCON
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.11
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Aqueous suspensions of alumina and zircon mixtures which are of practical interest in ceramics forming process were stabilized with an ammonium salt of a polycarboxilic acid as a dispersant (an anionic polyelectrolyte). Rheological properties of highly concentrated suspensions were determined by measuring shear viscosity and dynamic tests in the linear viscoelastic region. The effects of the degree of dispersion and solid volume fraction of the suspension φ{symbol} between 0.45 and 0.57 on dynamic viscoelastic properties were studied. Flow behavior of the suspensions changed from predominantly viscous to more elastic at a critical solid content φ{symbol}c, which depends on the polyelectrolyte addition. If a high amount of non-adsorbed polyelectrolyte was in solution, the suspension flocculated and exhibited a relatively low φ{symbol}c at which viscous to elastic transition occurred. The storage modulus reached a plateau in the high frequency region and gradually reduced at very low frequencies indicating a certain breakdown in the formed structure. The G′ at the plateau increased significantly with increasing φ{symbol}. Contrarily, heterocoagulated suspensions due to insufficient dispersant addition showed a predominant elastic behavior with viscoelastic parameters almost independent in the frequency region studied. Moreover, both moduli sharply increased with increasing φ{symbol} and achieved a magnitude of several orders higher than that of the flocculated suspension. Changes in the storage G′ and the loss G′ moduli due to the different additions of polyelectrolyte provided information about modifications on the suspension structure. © 2007 Elsevier B.V. All rights reserved.
Fil: Garrido, Liliana Beatriz. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Tecnología de Recursos Minerales y Cerámica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Tecnología de Recursos Minerales y Cerámica; Argentina
Fil: Califano, Alicia Noemi. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Criotecnología de Alimentos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Criotecnología de Alimentos; Argentina
description Aqueous suspensions of alumina and zircon mixtures which are of practical interest in ceramics forming process were stabilized with an ammonium salt of a polycarboxilic acid as a dispersant (an anionic polyelectrolyte). Rheological properties of highly concentrated suspensions were determined by measuring shear viscosity and dynamic tests in the linear viscoelastic region. The effects of the degree of dispersion and solid volume fraction of the suspension φ{symbol} between 0.45 and 0.57 on dynamic viscoelastic properties were studied. Flow behavior of the suspensions changed from predominantly viscous to more elastic at a critical solid content φ{symbol}c, which depends on the polyelectrolyte addition. If a high amount of non-adsorbed polyelectrolyte was in solution, the suspension flocculated and exhibited a relatively low φ{symbol}c at which viscous to elastic transition occurred. The storage modulus reached a plateau in the high frequency region and gradually reduced at very low frequencies indicating a certain breakdown in the formed structure. The G′ at the plateau increased significantly with increasing φ{symbol}. Contrarily, heterocoagulated suspensions due to insufficient dispersant addition showed a predominant elastic behavior with viscoelastic parameters almost independent in the frequency region studied. Moreover, both moduli sharply increased with increasing φ{symbol} and achieved a magnitude of several orders higher than that of the flocculated suspension. Changes in the storage G′ and the loss G′ moduli due to the different additions of polyelectrolyte provided information about modifications on the suspension structure. © 2007 Elsevier B.V. All rights reserved.
publishDate 2007
dc.date.none.fl_str_mv 2007-07-20
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/11336/151822
Garrido, Liliana Beatriz; Califano, Alicia Noemi; Effect of an excess of polyelectrolyte on viscoelastic properties of suspensions of alumina and zircon mixtures; Elsevier Science; Colloids and Surfaces A: Physicochemical and Engineering Aspects; 302; 1-3; 20-7-2007; 24-30
0927-7757
CONICET Digital
CONICET
url http://hdl.handle.net/11336/151822
identifier_str_mv Garrido, Liliana Beatriz; Califano, Alicia Noemi; Effect of an excess of polyelectrolyte on viscoelastic properties of suspensions of alumina and zircon mixtures; Elsevier Science; Colloids and Surfaces A: Physicochemical and Engineering Aspects; 302; 1-3; 20-7-2007; 24-30
0927-7757
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.colsurfa.2007.01.036
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_ 1844613644270174208
score 13.070432

Publicaciones similares