Interaction between cationic and conventional nonionic surfactants in the mixed micelle and monolayer formed in aqueous medium

Detalhes bibliográficos
Autor(a) principal: Negm,Nabel A.
Data de Publicação: 2011
Outros Autores: Sabagh,Ahmad M. El
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422011000600018
Resumo: Mixed micellization and surface properties of cationic and nonionic surfactants dimethyl decyl-, tetradecyl- and hexadecyl phosphineoxide mixtures are studied using conductivity and surface tension measurements. The models of Rubingh, Rosen, and Clint, are used to obtain the interaction parameter, minimum area per molecule, mixed micelle composition, free energies of mixing and activity coefficients. The micellar mole fractions were always higher than ideal values indicating high contributions of cationics in mixed micelles. Activity coefficients were less than unity indicating synergism in micelles. The negative free energies of mixing showed the stability of the surfactants in the mixed micelles.
id SBQ-3_74986b6adf28e99dbc3e0ab39e047f13
oai_identifier_str oai:scielo:S0100-40422011000600018
network_acronym_str SBQ-3
network_name_str Química Nova (Online)
repository_id_str
spelling Interaction between cationic and conventional nonionic surfactants in the mixed micelle and monolayer formed in aqueous mediummixed micellesregular solution theoryinteraction parameterMixed micellization and surface properties of cationic and nonionic surfactants dimethyl decyl-, tetradecyl- and hexadecyl phosphineoxide mixtures are studied using conductivity and surface tension measurements. The models of Rubingh, Rosen, and Clint, are used to obtain the interaction parameter, minimum area per molecule, mixed micelle composition, free energies of mixing and activity coefficients. The micellar mole fractions were always higher than ideal values indicating high contributions of cationics in mixed micelles. Activity coefficients were less than unity indicating synergism in micelles. The negative free energies of mixing showed the stability of the surfactants in the mixed micelles.Sociedade Brasileira de Química2011-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422011000600018Química Nova v.34 n.6 2011reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422011000600018info:eu-repo/semantics/openAccessNegm,Nabel A.Sabagh,Ahmad M. Eleng2011-08-01T00:00:00Zoai:scielo:S0100-40422011000600018Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2011-08-01T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Interaction between cationic and conventional nonionic surfactants in the mixed micelle and monolayer formed in aqueous medium
title Interaction between cationic and conventional nonionic surfactants in the mixed micelle and monolayer formed in aqueous medium
spellingShingle Interaction between cationic and conventional nonionic surfactants in the mixed micelle and monolayer formed in aqueous medium
Negm,Nabel A.
mixed micelles
regular solution theory
interaction parameter
title_short Interaction between cationic and conventional nonionic surfactants in the mixed micelle and monolayer formed in aqueous medium
title_full Interaction between cationic and conventional nonionic surfactants in the mixed micelle and monolayer formed in aqueous medium
title_fullStr Interaction between cationic and conventional nonionic surfactants in the mixed micelle and monolayer formed in aqueous medium
title_full_unstemmed Interaction between cationic and conventional nonionic surfactants in the mixed micelle and monolayer formed in aqueous medium
title_sort Interaction between cationic and conventional nonionic surfactants in the mixed micelle and monolayer formed in aqueous medium
author Negm,Nabel A.
author_facet Negm,Nabel A.
Sabagh,Ahmad M. El
author_role author
author2 Sabagh,Ahmad M. El
author2_role author
dc.contributor.author.fl_str_mv Negm,Nabel A.
Sabagh,Ahmad M. El
dc.subject.por.fl_str_mv mixed micelles
regular solution theory
interaction parameter
topic mixed micelles
regular solution theory
interaction parameter
description Mixed micellization and surface properties of cationic and nonionic surfactants dimethyl decyl-, tetradecyl- and hexadecyl phosphineoxide mixtures are studied using conductivity and surface tension measurements. The models of Rubingh, Rosen, and Clint, are used to obtain the interaction parameter, minimum area per molecule, mixed micelle composition, free energies of mixing and activity coefficients. The micellar mole fractions were always higher than ideal values indicating high contributions of cationics in mixed micelles. Activity coefficients were less than unity indicating synergism in micelles. The negative free energies of mixing showed the stability of the surfactants in the mixed micelles.
publishDate 2011
dc.date.none.fl_str_mv 2011-01-01
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=S0100-40422011000600018
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422011000600018
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0100-40422011000600018
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.34 n.6 2011
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
_version_ 1750318112321830912

Registros relacionados