A sedimentation study to optimize the dispersion of alumina nanoparticles in water

Detalhes bibliográficos
Autor(a) principal: Manjula,S.
Data de Publicação: 2005
Outros Autores: Kumar,S. Mahesh, Raichur,A. M., Madhu,G. M., Suresh,R., Raj,M. A. Lourdu Anthony
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Cerâmica (São Paulo. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132005000200009
Resumo: Sedimentation studies have been carried out to optimize the dispersion conditions of aqueous alumina nanopowder suspensions with or without dispersants (ammonium salt of polymethacrylic acid or rhamnolipids at 15%). Different dispersant dosages, solid loadings, pulp densities and pH values were examined. The iso-electric point (IEP) of the alumina nanopowder was found to be pHiep= 9.2. The experiments revealed that the polymethacrylic acid was more effective as dispersant than rhamnolipids in a wide range of pH at all solid-loading conditions tested. Optimum dispersant dosages for polymethacrylic acid and rhamnolipids to achieve maximum stability of alumina nanodispersion at iso-electric point were found to be 9.25 mg/g and 57.75 mg/g solids, respectively.
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spelling A sedimentation study to optimize the dispersion of alumina nanoparticles in wateralumina nanoparticlessedimentationiso-electric pointbio-surfactant JBR215darvan C.Sedimentation studies have been carried out to optimize the dispersion conditions of aqueous alumina nanopowder suspensions with or without dispersants (ammonium salt of polymethacrylic acid or rhamnolipids at 15%). Different dispersant dosages, solid loadings, pulp densities and pH values were examined. The iso-electric point (IEP) of the alumina nanopowder was found to be pHiep= 9.2. The experiments revealed that the polymethacrylic acid was more effective as dispersant than rhamnolipids in a wide range of pH at all solid-loading conditions tested. Optimum dispersant dosages for polymethacrylic acid and rhamnolipids to achieve maximum stability of alumina nanodispersion at iso-electric point were found to be 9.25 mg/g and 57.75 mg/g solids, respectively.Associação Brasileira de Cerâmica2005-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132005000200009Cerâmica v.51 n.318 2005reponame:Cerâmica (São Paulo. Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0366-69132005000200009info:eu-repo/semantics/openAccessManjula,S.Kumar,S. MaheshRaichur,A. M.Madhu,G. M.Suresh,R.Raj,M. A. Lourdu Anthonyeng2006-03-16T00:00:00Zoai:scielo:S0366-69132005000200009Revistahttps://www.scielo.br/j/ce/PUBhttps://old.scielo.br/oai/scielo-oai.phpceram.abc@gmail.com||ceram.abc@gmail.com1678-45530366-6913opendoar:2006-03-16T00:00Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv A sedimentation study to optimize the dispersion of alumina nanoparticles in water
title A sedimentation study to optimize the dispersion of alumina nanoparticles in water
spellingShingle A sedimentation study to optimize the dispersion of alumina nanoparticles in water
Manjula,S.
alumina nanoparticles
sedimentation
iso-electric point
bio-surfactant JBR215
darvan C.
title_short A sedimentation study to optimize the dispersion of alumina nanoparticles in water
title_full A sedimentation study to optimize the dispersion of alumina nanoparticles in water
title_fullStr A sedimentation study to optimize the dispersion of alumina nanoparticles in water
title_full_unstemmed A sedimentation study to optimize the dispersion of alumina nanoparticles in water
title_sort A sedimentation study to optimize the dispersion of alumina nanoparticles in water
author Manjula,S.
author_facet Manjula,S.
Kumar,S. Mahesh
Raichur,A. M.
Madhu,G. M.
Suresh,R.
Raj,M. A. Lourdu Anthony
author_role author
author2 Kumar,S. Mahesh
Raichur,A. M.
Madhu,G. M.
Suresh,R.
Raj,M. A. Lourdu Anthony
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Manjula,S.
Kumar,S. Mahesh
Raichur,A. M.
Madhu,G. M.
Suresh,R.
Raj,M. A. Lourdu Anthony
dc.subject.por.fl_str_mv alumina nanoparticles
sedimentation
iso-electric point
bio-surfactant JBR215
darvan C.
topic alumina nanoparticles
sedimentation
iso-electric point
bio-surfactant JBR215
darvan C.
description Sedimentation studies have been carried out to optimize the dispersion conditions of aqueous alumina nanopowder suspensions with or without dispersants (ammonium salt of polymethacrylic acid or rhamnolipids at 15%). Different dispersant dosages, solid loadings, pulp densities and pH values were examined. The iso-electric point (IEP) of the alumina nanopowder was found to be pHiep= 9.2. The experiments revealed that the polymethacrylic acid was more effective as dispersant than rhamnolipids in a wide range of pH at all solid-loading conditions tested. Optimum dispersant dosages for polymethacrylic acid and rhamnolipids to achieve maximum stability of alumina nanodispersion at iso-electric point were found to be 9.25 mg/g and 57.75 mg/g solids, respectively.
publishDate 2005
dc.date.none.fl_str_mv 2005-06-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132005000200009
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132005000200009
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0366-69132005000200009
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Associação Brasileira de Cerâmica
publisher.none.fl_str_mv Associação Brasileira de Cerâmica
dc.source.none.fl_str_mv Cerâmica v.51 n.318 2005
reponame:Cerâmica (São Paulo. Online)
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Cerâmica (São Paulo. Online)
collection Cerâmica (São Paulo. Online)
repository.name.fl_str_mv Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)
repository.mail.fl_str_mv ceram.abc@gmail.com||ceram.abc@gmail.com
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