First order phase transition during displacement of amphiphilic biomacromolecules from interfaces by surfactant molecules

Autores
Ettelaie, Rammile; Dickinson, Eric; Pugnaloni, Luis
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The adsorption of surfactants onto a hydrophobic interface, already laden with a fixed number of polymers, is studied using the self consistent field (SCF) calculation method of Scheutjens and Fleer. For polymers having unfavourable interactions with the surfactant molecules, the adsorption isotherms show an abrupt jump at a certain value of surfactant bulk concentration. Alternatively, the same behaviour is exhibited when the number of polymers on the interface is decreased. We show that this sudden jump is associated with a first-order phase transition, by calculating the free energy values for the stable and the metastable states at both sides of the transition point. We also observe that the transition can occur for two approaching surfaces, from a high surfactant coverage phase to a low surfactant coverage one, at sufficiently close separation distances. The consequence of this finding for the steric colloidal interactions, induced by the overlap of two polymer + surfactant films, is explored. In particular, a significantly different interaction, in terms of its magnitude and range, is predicted for these two phases. We also consider the relevance of the current study to problems involving the competitive displacement of proteins by surfactants in food colloid systems.
Fil: Ettelaie, Rammile. University of Leeds. School of Food Science and Nutrition. Food Colloids Group; UK
Fil: Dickinson, Eric. University of Leeds. School of Food Science and Nutrition. Food Colloids Group; UK
Fil: Pugnaloni, Luis A. UTN (Universidad Tecnológica Nacional). Facultad Regional La Plata. Departamento de Ingeniería Mecánica. GMG; Argentina
Peer Reviewed
Materia
Mixed surfactant + biopolymer films; First-order phase transition; Colloidal steric interactions
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-nd/4.0/
Repositorio
Repositorio Institucional Abierto (UTN)
Institución
Universidad Tecnológica Nacional
OAI Identificador
oai:ria.utn.edu.ar:20.500.12272/2771
Acceder
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network_name_str Repositorio Institucional Abierto (UTN)
spelling First order phase transition during displacement of amphiphilic biomacromolecules from interfaces by surfactant moleculesEttelaie, RammileDickinson, EricPugnaloni, LuisMixed surfactant + biopolymer films; First-order phase transition; Colloidal steric interactionsThe adsorption of surfactants onto a hydrophobic interface, already laden with a fixed number of polymers, is studied using the self consistent field (SCF) calculation method of Scheutjens and Fleer. For polymers having unfavourable interactions with the surfactant molecules, the adsorption isotherms show an abrupt jump at a certain value of surfactant bulk concentration. Alternatively, the same behaviour is exhibited when the number of polymers on the interface is decreased. We show that this sudden jump is associated with a first-order phase transition, by calculating the free energy values for the stable and the metastable states at both sides of the transition point. We also observe that the transition can occur for two approaching surfaces, from a high surfactant coverage phase to a low surfactant coverage one, at sufficiently close separation distances. The consequence of this finding for the steric colloidal interactions, induced by the overlap of two polymer + surfactant films, is explored. In particular, a significantly different interaction, in terms of its magnitude and range, is predicted for these two phases. We also consider the relevance of the current study to problems involving the competitive displacement of proteins by surfactants in food colloid systems.Fil: Ettelaie, Rammile. University of Leeds. School of Food Science and Nutrition. Food Colloids Group; UKFil: Dickinson, Eric. University of Leeds. School of Food Science and Nutrition. Food Colloids Group; UKFil: Pugnaloni, Luis A. UTN (Universidad Tecnológica Nacional). Facultad Regional La Plata. Departamento de Ingeniería Mecánica. GMG; ArgentinaPeer ReviewedJournal of Physics: Condensed Matter2018-04-23T21:09:46Z2018-04-23T21:09:46Z2014info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/20.500.12272/277110.1088/0953-8984/26/46/464109enghttps://doi.org/10.1088/0953-8984/26/46/464109info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/4.0/Atribución (Attribution): En cualquier explotación de la obra autorizada por la licencia será necesario reconocer la autoría (obligatoria en todos los casos). No comercial (Non Commercial): La explotación de la obra queda limitada a usos no comerciales. Sin obras derivadas (No Derivate Works): La autorización para explotar la obra no incluye la posibilidad de crear una obra derivada (traducciones, adaptaciones, etc.).Attribution-NonCommercial-NoDerivatives 4.0 Internacionalreponame:Repositorio Institucional Abierto (UTN)instname:Universidad Tecnológica Nacional2025-10-23T11:18:43Zoai:ria.utn.edu.ar:20.500.12272/2771instacron:UTNInstitucionalhttp://ria.utn.edu.ar/Universidad públicaNo correspondehttp://ria.utn.edu.ar/oaigestionria@rec.utn.edu.ar; fsuarez@rec.utn.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:a2025-10-23 11:18:43.461Repositorio Institucional Abierto (UTN) - Universidad Tecnológica Nacionalfalse
dc.title.none.fl_str_mv First order phase transition during displacement of amphiphilic biomacromolecules from interfaces by surfactant molecules
title First order phase transition during displacement of amphiphilic biomacromolecules from interfaces by surfactant molecules
spellingShingle First order phase transition during displacement of amphiphilic biomacromolecules from interfaces by surfactant molecules
Ettelaie, Rammile
Mixed surfactant + biopolymer films; First-order phase transition; Colloidal steric interactions
title_short First order phase transition during displacement of amphiphilic biomacromolecules from interfaces by surfactant molecules
title_full First order phase transition during displacement of amphiphilic biomacromolecules from interfaces by surfactant molecules
title_fullStr First order phase transition during displacement of amphiphilic biomacromolecules from interfaces by surfactant molecules
title_full_unstemmed First order phase transition during displacement of amphiphilic biomacromolecules from interfaces by surfactant molecules
title_sort First order phase transition during displacement of amphiphilic biomacromolecules from interfaces by surfactant molecules
dc.creator.none.fl_str_mv Ettelaie, Rammile
Dickinson, Eric
Pugnaloni, Luis
author Ettelaie, Rammile
author_facet Ettelaie, Rammile
Dickinson, Eric
Pugnaloni, Luis
author_role author
author2 Dickinson, Eric
Pugnaloni, Luis
author2_role author
author
dc.subject.none.fl_str_mv Mixed surfactant + biopolymer films; First-order phase transition; Colloidal steric interactions
topic Mixed surfactant + biopolymer films; First-order phase transition; Colloidal steric interactions
dc.description.none.fl_txt_mv The adsorption of surfactants onto a hydrophobic interface, already laden with a fixed number of polymers, is studied using the self consistent field (SCF) calculation method of Scheutjens and Fleer. For polymers having unfavourable interactions with the surfactant molecules, the adsorption isotherms show an abrupt jump at a certain value of surfactant bulk concentration. Alternatively, the same behaviour is exhibited when the number of polymers on the interface is decreased. We show that this sudden jump is associated with a first-order phase transition, by calculating the free energy values for the stable and the metastable states at both sides of the transition point. We also observe that the transition can occur for two approaching surfaces, from a high surfactant coverage phase to a low surfactant coverage one, at sufficiently close separation distances. The consequence of this finding for the steric colloidal interactions, induced by the overlap of two polymer + surfactant films, is explored. In particular, a significantly different interaction, in terms of its magnitude and range, is predicted for these two phases. We also consider the relevance of the current study to problems involving the competitive displacement of proteins by surfactants in food colloid systems.
Fil: Ettelaie, Rammile. University of Leeds. School of Food Science and Nutrition. Food Colloids Group; UK
Fil: Dickinson, Eric. University of Leeds. School of Food Science and Nutrition. Food Colloids Group; UK
Fil: Pugnaloni, Luis A. UTN (Universidad Tecnológica Nacional). Facultad Regional La Plata. Departamento de Ingeniería Mecánica. GMG; Argentina
Peer Reviewed
description The adsorption of surfactants onto a hydrophobic interface, already laden with a fixed number of polymers, is studied using the self consistent field (SCF) calculation method of Scheutjens and Fleer. For polymers having unfavourable interactions with the surfactant molecules, the adsorption isotherms show an abrupt jump at a certain value of surfactant bulk concentration. Alternatively, the same behaviour is exhibited when the number of polymers on the interface is decreased. We show that this sudden jump is associated with a first-order phase transition, by calculating the free energy values for the stable and the metastable states at both sides of the transition point. We also observe that the transition can occur for two approaching surfaces, from a high surfactant coverage phase to a low surfactant coverage one, at sufficiently close separation distances. The consequence of this finding for the steric colloidal interactions, induced by the overlap of two polymer + surfactant films, is explored. In particular, a significantly different interaction, in terms of its magnitude and range, is predicted for these two phases. We also consider the relevance of the current study to problems involving the competitive displacement of proteins by surfactants in food colloid systems.
publishDate 2014
dc.date.none.fl_str_mv 2014
2018-04-23T21:09:46Z
2018-04-23T21:09:46Z
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12272/2771
10.1088/0953-8984/26/46/464109
url http://hdl.handle.net/20.500.12272/2771
identifier_str_mv 10.1088/0953-8984/26/46/464109
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://doi.org/10.1088/0953-8984/26/46/464109
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
Atribución (Attribution): En cualquier explotación de la obra autorizada por la licencia será necesario reconocer la autoría (obligatoria en todos los casos). No comercial (Non Commercial): La explotación de la obra queda limitada a usos no comerciales. Sin obras derivadas (No Derivate Works): La autorización para explotar la obra no incluye la posibilidad de crear una obra derivada (traducciones, adaptaciones, etc.).
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/4.0/
Atribución (Attribution): En cualquier explotación de la obra autorizada por la licencia será necesario reconocer la autoría (obligatoria en todos los casos). No comercial (Non Commercial): La explotación de la obra queda limitada a usos no comerciales. Sin obras derivadas (No Derivate Works): La autorización para explotar la obra no incluye la posibilidad de crear una obra derivada (traducciones, adaptaciones, etc.).
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Journal of Physics: Condensed Matter
publisher.none.fl_str_mv Journal of Physics: Condensed Matter
dc.source.none.fl_str_mv reponame:Repositorio Institucional Abierto (UTN)
instname:Universidad Tecnológica Nacional
reponame_str Repositorio Institucional Abierto (UTN)
collection Repositorio Institucional Abierto (UTN)
instname_str Universidad Tecnológica Nacional
repository.name.fl_str_mv Repositorio Institucional Abierto (UTN) - Universidad Tecnológica Nacional
repository.mail.fl_str_mv gestionria@rec.utn.edu.ar; fsuarez@rec.utn.edu.ar
_version_ 1846787944447213568
score 12.471625

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