Deflocculation of kaolin suspensions - The effect of various electrolytes

Detalhes bibliográficos
Autor(a) principal: Penkavova, V.
Data de Publicação: 2015
Outros Autores: Guerreiro, M., Tihon, J., Teixeira, J. A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/38238
Resumo: Viscosity reduction of aqueous kaolin suspensions by conventional additives (deflocculation) is studied, using standard viscosity measurements. Apparent viscosity at 100 s-1, and flow behavior index n give complex information about changes of viscosity and flow character of deflocculated suspensions. Several widely used deflocculants - electrolytes and polyelectrolytes - are tested in a wide range of concentrations. The optimum concentrations of these deflocculants, which result in minimum apparent viscosity of suspension, are found. Sedimentation stability of deflocculated suspensions is monitored. Inorganic electrolytes are found to be more effective in viscosity reduction. On the other hand, low-molecular-weight polyelectrolytes produce more stable final suspensions.
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spelling Deflocculation of kaolin suspensions - The effect of various electrolyteskaolin suspensionsdeflocculantsviscosity measurementsstability of suspensionsScience & TechnologyViscosity reduction of aqueous kaolin suspensions by conventional additives (deflocculation) is studied, using standard viscosity measurements. Apparent viscosity at 100 s-1, and flow behavior index n give complex information about changes of viscosity and flow character of deflocculated suspensions. Several widely used deflocculants - electrolytes and polyelectrolytes - are tested in a wide range of concentrations. The optimum concentrations of these deflocculants, which result in minimum apparent viscosity of suspension, are found. Sedimentation stability of deflocculated suspensions is monitored. Inorganic electrolytes are found to be more effective in viscosity reduction. On the other hand, low-molecular-weight polyelectrolytes produce more stable final suspensions.The support by Czech Science Foundation GACR through the contract P101/12/0585 is gratefully acknowledged.Vincentz VerlagUniversidade do MinhoPenkavova, V.Guerreiro, M.Tihon, J.Teixeira, J. A.20152015-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/38238engPenkavova, V.; Guerreiro, M.; Tihon, J.; Teixeira, J. A., Deflocculation of kaolin suspensions - The effect of various electrolytes. Applied Rheology, 25(2), 24151, 20151430-63951617-810610.3933/ApplRheol-25-24151http://www.appliedrheology.org/info: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:RCAAP2023-07-21T12:34:54Zoai:repositorium.sdum.uminho.pt:1822/38238Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:30:40.652394Repositório 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 Deflocculation of kaolin suspensions - The effect of various electrolytes
title Deflocculation of kaolin suspensions - The effect of various electrolytes
spellingShingle Deflocculation of kaolin suspensions - The effect of various electrolytes
Penkavova, V.
kaolin suspensions
deflocculants
viscosity measurements
stability of suspensions
Science & Technology
title_short Deflocculation of kaolin suspensions - The effect of various electrolytes
title_full Deflocculation of kaolin suspensions - The effect of various electrolytes
title_fullStr Deflocculation of kaolin suspensions - The effect of various electrolytes
title_full_unstemmed Deflocculation of kaolin suspensions - The effect of various electrolytes
title_sort Deflocculation of kaolin suspensions - The effect of various electrolytes
author Penkavova, V.
author_facet Penkavova, V.
Guerreiro, M.
Tihon, J.
Teixeira, J. A.
author_role author
author2 Guerreiro, M.
Tihon, J.
Teixeira, J. A.
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Penkavova, V.
Guerreiro, M.
Tihon, J.
Teixeira, J. A.
dc.subject.por.fl_str_mv kaolin suspensions
deflocculants
viscosity measurements
stability of suspensions
Science & Technology
topic kaolin suspensions
deflocculants
viscosity measurements
stability of suspensions
Science & Technology
description Viscosity reduction of aqueous kaolin suspensions by conventional additives (deflocculation) is studied, using standard viscosity measurements. Apparent viscosity at 100 s-1, and flow behavior index n give complex information about changes of viscosity and flow character of deflocculated suspensions. Several widely used deflocculants - electrolytes and polyelectrolytes - are tested in a wide range of concentrations. The optimum concentrations of these deflocculants, which result in minimum apparent viscosity of suspension, are found. Sedimentation stability of deflocculated suspensions is monitored. Inorganic electrolytes are found to be more effective in viscosity reduction. On the other hand, low-molecular-weight polyelectrolytes produce more stable final suspensions.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015-01-01T00:00:00Z
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/1822/38238
url http://hdl.handle.net/1822/38238
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Penkavova, V.; Guerreiro, M.; Tihon, J.; Teixeira, J. A., Deflocculation of kaolin suspensions - The effect of various electrolytes. Applied Rheology, 25(2), 24151, 2015
1430-6395
1617-8106
10.3933/ApplRheol-25-24151
http://www.appliedrheology.org/
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 Vincentz Verlag
publisher.none.fl_str_mv Vincentz Verlag
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
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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