Studies on Anionic Surfactant Structure in the Aggregation with (Hydroxypropyl)cellulose
Autor(a) principal: | |
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Data de Publicação: | 2002 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Polímeros (São Carlos. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282002000200010 |
Resumo: | Fluorescence probing, viscosity and light scattering measurements have been combined to study the aggregation of different anionic surfactants mainly in dilute solutions (0.5% w/v) of (hydroxypropyl)cellulose (HPC MW 173,000), in moderate ionic strength (NaCl 0.1 mol.L-1). The set of surfactants includes natural cholesterol derivatives, sodium cholate (CS) and sodium deoxycholate (DC), and the alkylsulphate, sodium dodecylsulphate (SDS). At 298 K the critical surfactant concentration related to aggregate/HPC formation (C1) decreases for SDS and DC whereas it increases slightly for CS. At 312 K the C1 values for CS and DC are slightly shifted toward higher values whereas it is not changed for SDS. All surfactant/HPC systems increase C1 values as the HPC concentration increases to 1.2%. Above C1 the viscosity increases for all surfactant/HPC systems but it is sharper in the increasing order CS, DC and SDS. The hydrodynamic behavior indicates that CS induces higher diffusion to HPC than SDS and DC. The aggregation in the surfactant/HPC systems is analyzed through the feature of surfactant/aggregate structure (size, charge density, etc). |
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Studies on Anionic Surfactant Structure in the Aggregation with (Hydroxypropyl)celluloseAggregatebile salthydrophobic(hydroxypropyl) cellulosefluorescencelight scatteringviscosityFluorescence probing, viscosity and light scattering measurements have been combined to study the aggregation of different anionic surfactants mainly in dilute solutions (0.5% w/v) of (hydroxypropyl)cellulose (HPC MW 173,000), in moderate ionic strength (NaCl 0.1 mol.L-1). The set of surfactants includes natural cholesterol derivatives, sodium cholate (CS) and sodium deoxycholate (DC), and the alkylsulphate, sodium dodecylsulphate (SDS). At 298 K the critical surfactant concentration related to aggregate/HPC formation (C1) decreases for SDS and DC whereas it increases slightly for CS. At 312 K the C1 values for CS and DC are slightly shifted toward higher values whereas it is not changed for SDS. All surfactant/HPC systems increase C1 values as the HPC concentration increases to 1.2%. Above C1 the viscosity increases for all surfactant/HPC systems but it is sharper in the increasing order CS, DC and SDS. The hydrodynamic behavior indicates that CS induces higher diffusion to HPC than SDS and DC. The aggregation in the surfactant/HPC systems is analyzed through the feature of surfactant/aggregate structure (size, charge density, etc).Associação Brasileira de Polímeros2002-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282002000200010Polímeros v.12 n.2 2002reponame:Polímeros (São Carlos. Online)instname:Associação Brasileira de Polímeros (ABPol)instacron:ABPO10.1590/S0104-14282002000200010info:eu-repo/semantics/openAccessMartins,Ricardo M. deSilva,Carolina A.Becker,CristianeSamios,DimitriosBica,Clara I. D.Christoff,Marceloeng2002-08-27T00:00:00Zoai:scielo:S0104-14282002000200010Revistahttp://www.scielo.br/pohttps://old.scielo.br/oai/scielo-oai.php||revista@abpol.org.br1678-51690104-1428opendoar:2002-08-27T00:00Polímeros (São Carlos. Online) - Associação Brasileira de Polímeros (ABPol)false |
dc.title.none.fl_str_mv |
Studies on Anionic Surfactant Structure in the Aggregation with (Hydroxypropyl)cellulose |
title |
Studies on Anionic Surfactant Structure in the Aggregation with (Hydroxypropyl)cellulose |
spellingShingle |
Studies on Anionic Surfactant Structure in the Aggregation with (Hydroxypropyl)cellulose Martins,Ricardo M. de Aggregate bile salt hydrophobic (hydroxypropyl) cellulose fluorescence light scattering viscosity |
title_short |
Studies on Anionic Surfactant Structure in the Aggregation with (Hydroxypropyl)cellulose |
title_full |
Studies on Anionic Surfactant Structure in the Aggregation with (Hydroxypropyl)cellulose |
title_fullStr |
Studies on Anionic Surfactant Structure in the Aggregation with (Hydroxypropyl)cellulose |
title_full_unstemmed |
Studies on Anionic Surfactant Structure in the Aggregation with (Hydroxypropyl)cellulose |
title_sort |
Studies on Anionic Surfactant Structure in the Aggregation with (Hydroxypropyl)cellulose |
author |
Martins,Ricardo M. de |
author_facet |
Martins,Ricardo M. de Silva,Carolina A. Becker,Cristiane Samios,Dimitrios Bica,Clara I. D. Christoff,Marcelo |
author_role |
author |
author2 |
Silva,Carolina A. Becker,Cristiane Samios,Dimitrios Bica,Clara I. D. Christoff,Marcelo |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Martins,Ricardo M. de Silva,Carolina A. Becker,Cristiane Samios,Dimitrios Bica,Clara I. D. Christoff,Marcelo |
dc.subject.por.fl_str_mv |
Aggregate bile salt hydrophobic (hydroxypropyl) cellulose fluorescence light scattering viscosity |
topic |
Aggregate bile salt hydrophobic (hydroxypropyl) cellulose fluorescence light scattering viscosity |
description |
Fluorescence probing, viscosity and light scattering measurements have been combined to study the aggregation of different anionic surfactants mainly in dilute solutions (0.5% w/v) of (hydroxypropyl)cellulose (HPC MW 173,000), in moderate ionic strength (NaCl 0.1 mol.L-1). The set of surfactants includes natural cholesterol derivatives, sodium cholate (CS) and sodium deoxycholate (DC), and the alkylsulphate, sodium dodecylsulphate (SDS). At 298 K the critical surfactant concentration related to aggregate/HPC formation (C1) decreases for SDS and DC whereas it increases slightly for CS. At 312 K the C1 values for CS and DC are slightly shifted toward higher values whereas it is not changed for SDS. All surfactant/HPC systems increase C1 values as the HPC concentration increases to 1.2%. Above C1 the viscosity increases for all surfactant/HPC systems but it is sharper in the increasing order CS, DC and SDS. The hydrodynamic behavior indicates that CS induces higher diffusion to HPC than SDS and DC. The aggregation in the surfactant/HPC systems is analyzed through the feature of surfactant/aggregate structure (size, charge density, etc). |
publishDate |
2002 |
dc.date.none.fl_str_mv |
2002-01-01 |
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=S0104-14282002000200010 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282002000200010 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0104-14282002000200010 |
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 Polímeros |
publisher.none.fl_str_mv |
Associação Brasileira de Polímeros |
dc.source.none.fl_str_mv |
Polímeros v.12 n.2 2002 reponame:Polímeros (São Carlos. Online) instname:Associação Brasileira de Polímeros (ABPol) instacron:ABPO |
instname_str |
Associação Brasileira de Polímeros (ABPol) |
instacron_str |
ABPO |
institution |
ABPO |
reponame_str |
Polímeros (São Carlos. Online) |
collection |
Polímeros (São Carlos. Online) |
repository.name.fl_str_mv |
Polímeros (São Carlos. Online) - Associação Brasileira de Polímeros (ABPol) |
repository.mail.fl_str_mv |
||revista@abpol.org.br |
_version_ |
1754212583613661184 |