Discrepancies over the onset of surfactant monomer aggregation interpreted by fluorescence, conductivity and surface tension methods

Detalhes bibliográficos
Autor(a) principal: Costa,Maria de Fátima Carvalho
Data de Publicação: 1998
Outros Autores: Froehner,Sandro José, Ruzza,Ângelo Adolfo, Santos,Sônia de Fátima, Zanette,Dino
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421998000300007
Resumo: Molecular probe techniques have made important contributions to the determination of microstructure of surfactant assemblies such as size, stability, micropolarity and conformation. Conductivity and surface tension were used to determine the critical aggregation concentration (cac) of polymer-surfactant complexes and the critical micellar concentration (cmc) of aqueous micellar aggregates. The results are compared with those of fluorescent techniques. Several surfactant systems were examined, 1-butanol-sodium dodecylsulfate (SDS) mixtures, solutions containing poly(ethylene oxide)-SDS, poly(vinylpyrrolidone)-SDS and poly(acrylic acid)-alkyltrimethylammonium bromide complexes. We found differences between the cac and cmc values obtained by conductivity or surface tension and those obtained by techniques which use hydrophobic probe.
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spelling Discrepancies over the onset of surfactant monomer aggregation interpreted by fluorescence, conductivity and surface tension methods1-butanol/sodium dodecylsulfate mixturescritical aggregation concentrationpolymer-surfactant interactionsketal hydrolysesMolecular probe techniques have made important contributions to the determination of microstructure of surfactant assemblies such as size, stability, micropolarity and conformation. Conductivity and surface tension were used to determine the critical aggregation concentration (cac) of polymer-surfactant complexes and the critical micellar concentration (cmc) of aqueous micellar aggregates. The results are compared with those of fluorescent techniques. Several surfactant systems were examined, 1-butanol-sodium dodecylsulfate (SDS) mixtures, solutions containing poly(ethylene oxide)-SDS, poly(vinylpyrrolidone)-SDS and poly(acrylic acid)-alkyltrimethylammonium bromide complexes. We found differences between the cac and cmc values obtained by conductivity or surface tension and those obtained by techniques which use hydrophobic probe.Sociedade Brasileira de Química1998-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421998000300007Química Nova v.21 n.3 1998reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40421998000300007info:eu-repo/semantics/openAccessCosta,Maria de Fátima CarvalhoFroehner,Sandro JoséRuzza,Ângelo AdolfoSantos,Sônia de FátimaZanette,Dinoeng2003-12-04T00:00:00Zoai:scielo:S0100-40421998000300007Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2003-12-04T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Discrepancies over the onset of surfactant monomer aggregation interpreted by fluorescence, conductivity and surface tension methods
title Discrepancies over the onset of surfactant monomer aggregation interpreted by fluorescence, conductivity and surface tension methods
spellingShingle Discrepancies over the onset of surfactant monomer aggregation interpreted by fluorescence, conductivity and surface tension methods
Costa,Maria de Fátima Carvalho
1-butanol/sodium dodecylsulfate mixtures
critical aggregation concentration
polymer-surfactant interactions
ketal hydrolyses
title_short Discrepancies over the onset of surfactant monomer aggregation interpreted by fluorescence, conductivity and surface tension methods
title_full Discrepancies over the onset of surfactant monomer aggregation interpreted by fluorescence, conductivity and surface tension methods
title_fullStr Discrepancies over the onset of surfactant monomer aggregation interpreted by fluorescence, conductivity and surface tension methods
title_full_unstemmed Discrepancies over the onset of surfactant monomer aggregation interpreted by fluorescence, conductivity and surface tension methods
title_sort Discrepancies over the onset of surfactant monomer aggregation interpreted by fluorescence, conductivity and surface tension methods
author Costa,Maria de Fátima Carvalho
author_facet Costa,Maria de Fátima Carvalho
Froehner,Sandro José
Ruzza,Ângelo Adolfo
Santos,Sônia de Fátima
Zanette,Dino
author_role author
author2 Froehner,Sandro José
Ruzza,Ângelo Adolfo
Santos,Sônia de Fátima
Zanette,Dino
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Costa,Maria de Fátima Carvalho
Froehner,Sandro José
Ruzza,Ângelo Adolfo
Santos,Sônia de Fátima
Zanette,Dino
dc.subject.por.fl_str_mv 1-butanol/sodium dodecylsulfate mixtures
critical aggregation concentration
polymer-surfactant interactions
ketal hydrolyses
topic 1-butanol/sodium dodecylsulfate mixtures
critical aggregation concentration
polymer-surfactant interactions
ketal hydrolyses
description Molecular probe techniques have made important contributions to the determination of microstructure of surfactant assemblies such as size, stability, micropolarity and conformation. Conductivity and surface tension were used to determine the critical aggregation concentration (cac) of polymer-surfactant complexes and the critical micellar concentration (cmc) of aqueous micellar aggregates. The results are compared with those of fluorescent techniques. Several surfactant systems were examined, 1-butanol-sodium dodecylsulfate (SDS) mixtures, solutions containing poly(ethylene oxide)-SDS, poly(vinylpyrrolidone)-SDS and poly(acrylic acid)-alkyltrimethylammonium bromide complexes. We found differences between the cac and cmc values obtained by conductivity or surface tension and those obtained by techniques which use hydrophobic probe.
publishDate 1998
dc.date.none.fl_str_mv 1998-06-01
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=S0100-40421998000300007
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421998000300007
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0100-40421998000300007
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 Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Química Nova v.21 n.3 1998
reponame:Química Nova (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Química Nova (Online)
collection Química Nova (Online)
repository.name.fl_str_mv Química Nova (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv quimicanova@sbq.org.br
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