Anionic surfactant aggregation with (Hydroxypropyl)cellulose in the presence of added salt
Autor(a) principal: | |
---|---|
Data de Publicação: | 2006 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of the Brazilian Chemical Society (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000500019 |
Resumo: | The aggregation of different anionic surfactants in dilute aqueous solutions of (hydroxypropyl)cellulose (HPC) under moderate ionic strength (NaCl 0.1 mol L-1) was studied. The surfactants were sodium cholate (CS), sodium deoxycholate (DC) and sodium dodecylsulphate (SDS). By fluorescence probing, the critical aggregate concentration (C1) decreased for SDS and DC in comparison to the critical micelle concentration (CMC) whereas it increased for CS at 298 K. The relative viscosity reached a maximum for SDS/HPC but remained constant for CS/HPC and DC/HPC. By light scattering, cloud points were verified to increase. By dynamic light scattering, it was concluded that, at low surfactant contents, the fast mode of HPC is related to surfactant/HPC aggregates and shorter HPC chains; at high contents, to free micelles. The slow mode is linked to interchain polymer-surfactant complexes and HPC clusters. For the bile salts/ HPC systems, the mechanism of aggregation may occur in two steps. |
id |
SBQ-2_f9a6999f6cafc662036bc7c78b90ae1c |
---|---|
oai_identifier_str |
oai:scielo:S0103-50532006000500019 |
network_acronym_str |
SBQ-2 |
network_name_str |
Journal of the Brazilian Chemical Society (Online) |
repository_id_str |
|
spelling |
Anionic surfactant aggregation with (Hydroxypropyl)cellulose in the presence of added saltbile saltcholateanionic surfactant(hydroxypropyl)celluloselight scatteringThe aggregation of different anionic surfactants in dilute aqueous solutions of (hydroxypropyl)cellulose (HPC) under moderate ionic strength (NaCl 0.1 mol L-1) was studied. The surfactants were sodium cholate (CS), sodium deoxycholate (DC) and sodium dodecylsulphate (SDS). By fluorescence probing, the critical aggregate concentration (C1) decreased for SDS and DC in comparison to the critical micelle concentration (CMC) whereas it increased for CS at 298 K. The relative viscosity reached a maximum for SDS/HPC but remained constant for CS/HPC and DC/HPC. By light scattering, cloud points were verified to increase. By dynamic light scattering, it was concluded that, at low surfactant contents, the fast mode of HPC is related to surfactant/HPC aggregates and shorter HPC chains; at high contents, to free micelles. The slow mode is linked to interchain polymer-surfactant complexes and HPC clusters. For the bile salts/ HPC systems, the mechanism of aggregation may occur in two steps.Sociedade Brasileira de Química2006-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000500019Journal of the Brazilian Chemical Society v.17 n.5 2006reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532006000500019info:eu-repo/semantics/openAccessMartins,Ricardo M.Silva,Carolina A. daBecker,Cristiane M.Samios,DimitriosChristoff,MarceloBica,Clara I. D.eng2006-12-01T00:00:00Zoai:scielo:S0103-50532006000500019Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2006-12-01T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Anionic surfactant aggregation with (Hydroxypropyl)cellulose in the presence of added salt |
title |
Anionic surfactant aggregation with (Hydroxypropyl)cellulose in the presence of added salt |
spellingShingle |
Anionic surfactant aggregation with (Hydroxypropyl)cellulose in the presence of added salt Martins,Ricardo M. bile salt cholate anionic surfactant (hydroxypropyl)cellulose light scattering |
title_short |
Anionic surfactant aggregation with (Hydroxypropyl)cellulose in the presence of added salt |
title_full |
Anionic surfactant aggregation with (Hydroxypropyl)cellulose in the presence of added salt |
title_fullStr |
Anionic surfactant aggregation with (Hydroxypropyl)cellulose in the presence of added salt |
title_full_unstemmed |
Anionic surfactant aggregation with (Hydroxypropyl)cellulose in the presence of added salt |
title_sort |
Anionic surfactant aggregation with (Hydroxypropyl)cellulose in the presence of added salt |
author |
Martins,Ricardo M. |
author_facet |
Martins,Ricardo M. Silva,Carolina A. da Becker,Cristiane M. Samios,Dimitrios Christoff,Marcelo Bica,Clara I. D. |
author_role |
author |
author2 |
Silva,Carolina A. da Becker,Cristiane M. Samios,Dimitrios Christoff,Marcelo Bica,Clara I. D. |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Martins,Ricardo M. Silva,Carolina A. da Becker,Cristiane M. Samios,Dimitrios Christoff,Marcelo Bica,Clara I. D. |
dc.subject.por.fl_str_mv |
bile salt cholate anionic surfactant (hydroxypropyl)cellulose light scattering |
topic |
bile salt cholate anionic surfactant (hydroxypropyl)cellulose light scattering |
description |
The aggregation of different anionic surfactants in dilute aqueous solutions of (hydroxypropyl)cellulose (HPC) under moderate ionic strength (NaCl 0.1 mol L-1) was studied. The surfactants were sodium cholate (CS), sodium deoxycholate (DC) and sodium dodecylsulphate (SDS). By fluorescence probing, the critical aggregate concentration (C1) decreased for SDS and DC in comparison to the critical micelle concentration (CMC) whereas it increased for CS at 298 K. The relative viscosity reached a maximum for SDS/HPC but remained constant for CS/HPC and DC/HPC. By light scattering, cloud points were verified to increase. By dynamic light scattering, it was concluded that, at low surfactant contents, the fast mode of HPC is related to surfactant/HPC aggregates and shorter HPC chains; at high contents, to free micelles. The slow mode is linked to interchain polymer-surfactant complexes and HPC clusters. For the bile salts/ HPC systems, the mechanism of aggregation may occur in two steps. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-10-01 |
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=S0103-50532006000500019 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532006000500019 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50532006000500019 |
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 |
Journal of the Brazilian Chemical Society v.17 n.5 2006 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Journal of the Brazilian Chemical Society (Online) |
collection |
Journal of the Brazilian Chemical Society (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
_version_ |
1750318167357390848 |