Controlling Foam Stability with the Ratio of Myristic Acid to Choline Hydroxide

Autores
Arnould, Audrey; Cousin, Fabrice; Salonen, Anniina; Saint Jalmes, Arnaud; Perez, Adrián Alejandro; Fameau, Anne Laure
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The interfacial and foam properties of a model system based on the mixture between myristic acid and choline hydroxide have been investigated as a function of the molar ratio (R) between these two components and temperature. The aim of this study was to obtain insight on the links between the self-assemblies in bulk and in the foam liquid channels, the surfactant packing at the interface, and the resulting foam properties and stability. A multiscale approach was used combining small angle neutron scattering, specular neutron reflectivity, surface tension measurements, and photography. We highlighted three regimes of foam stability in this system by modifying R: high foam stability for R < 1, intermediate at R ∼ 1, and low for R > 1. The different regimes come from the pH variations in bulk linked to R. The pH plays a crucial role at the molecular scale by setting the ionization state of the myristic acid molecules adsorbed at the gas-liquid interface, which in turn controls both the properties of the monolayer and the stability of the films separating the bubbles. The main requirement to obtain stable foams is to set the pH close to the pKa in order to have a mixture of protonated and ionized molecules giving rise to intermolecular hydrogen bonds. As a result, a dense monolayer is formed at the interface with a low surface tension. R also modifies the structure of self-assembly in bulk and therefore within the foam, but such a morphological change has only a minor effect on the foam stability. This study confirms that foam stability in surfactant systems having a carboxylic acid as polar headgroup is mainly linked to the ionization state of the molecules at the interface.
Fil: Arnould, Audrey. No especifíca;
Fil: Cousin, Fabrice. No especifíca;
Fil: Salonen, Anniina. No especifíca;
Fil: Saint Jalmes, Arnaud. Centre National de la Recherche Scientifique; Francia
Fil: Perez, Adrián Alejandro. Universidad Nacional del Litoral; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina
Fil: Fameau, Anne Laure. No especifíca;
Materia
MYRISTIC ACID
SELF ASSEMBLY
FOAMS
SMART FOAMS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/152920

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network_name_str CONICET Digital (CONICET)
spelling Controlling Foam Stability with the Ratio of Myristic Acid to Choline HydroxideArnould, AudreyCousin, FabriceSalonen, AnniinaSaint Jalmes, ArnaudPerez, Adrián AlejandroFameau, Anne LaureMYRISTIC ACIDSELF ASSEMBLYFOAMSSMART FOAMShttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The interfacial and foam properties of a model system based on the mixture between myristic acid and choline hydroxide have been investigated as a function of the molar ratio (R) between these two components and temperature. The aim of this study was to obtain insight on the links between the self-assemblies in bulk and in the foam liquid channels, the surfactant packing at the interface, and the resulting foam properties and stability. A multiscale approach was used combining small angle neutron scattering, specular neutron reflectivity, surface tension measurements, and photography. We highlighted three regimes of foam stability in this system by modifying R: high foam stability for R < 1, intermediate at R ∼ 1, and low for R > 1. The different regimes come from the pH variations in bulk linked to R. The pH plays a crucial role at the molecular scale by setting the ionization state of the myristic acid molecules adsorbed at the gas-liquid interface, which in turn controls both the properties of the monolayer and the stability of the films separating the bubbles. The main requirement to obtain stable foams is to set the pH close to the pKa in order to have a mixture of protonated and ionized molecules giving rise to intermolecular hydrogen bonds. As a result, a dense monolayer is formed at the interface with a low surface tension. R also modifies the structure of self-assembly in bulk and therefore within the foam, but such a morphological change has only a minor effect on the foam stability. This study confirms that foam stability in surfactant systems having a carboxylic acid as polar headgroup is mainly linked to the ionization state of the molecules at the interface.Fil: Arnould, Audrey. No especifíca;Fil: Cousin, Fabrice. No especifíca;Fil: Salonen, Anniina. No especifíca;Fil: Saint Jalmes, Arnaud. Centre National de la Recherche Scientifique; FranciaFil: Perez, Adrián Alejandro. Universidad Nacional del Litoral; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; ArgentinaFil: Fameau, Anne Laure. No especifíca;American Chemical Society2018-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/152920Arnould, Audrey; Cousin, Fabrice; Salonen, Anniina; Saint Jalmes, Arnaud; Perez, Adrián Alejandro; et al.; Controlling Foam Stability with the Ratio of Myristic Acid to Choline Hydroxide; American Chemical Society; Langmuir; 34; 37; 9-2018; 11076-110850743-7463CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1021/acs.langmuir.8b02261info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:45:40Zoai:ri.conicet.gov.ar:11336/152920instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:45:41.094CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Controlling Foam Stability with the Ratio of Myristic Acid to Choline Hydroxide
title Controlling Foam Stability with the Ratio of Myristic Acid to Choline Hydroxide
spellingShingle Controlling Foam Stability with the Ratio of Myristic Acid to Choline Hydroxide
Arnould, Audrey
MYRISTIC ACID
SELF ASSEMBLY
FOAMS
SMART FOAMS
title_short Controlling Foam Stability with the Ratio of Myristic Acid to Choline Hydroxide
title_full Controlling Foam Stability with the Ratio of Myristic Acid to Choline Hydroxide
title_fullStr Controlling Foam Stability with the Ratio of Myristic Acid to Choline Hydroxide
title_full_unstemmed Controlling Foam Stability with the Ratio of Myristic Acid to Choline Hydroxide
title_sort Controlling Foam Stability with the Ratio of Myristic Acid to Choline Hydroxide
dc.creator.none.fl_str_mv Arnould, Audrey
Cousin, Fabrice
Salonen, Anniina
Saint Jalmes, Arnaud
Perez, Adrián Alejandro
Fameau, Anne Laure
author Arnould, Audrey
author_facet Arnould, Audrey
Cousin, Fabrice
Salonen, Anniina
Saint Jalmes, Arnaud
Perez, Adrián Alejandro
Fameau, Anne Laure
author_role author
author2 Cousin, Fabrice
Salonen, Anniina
Saint Jalmes, Arnaud
Perez, Adrián Alejandro
Fameau, Anne Laure
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv MYRISTIC ACID
SELF ASSEMBLY
FOAMS
SMART FOAMS
topic MYRISTIC ACID
SELF ASSEMBLY
FOAMS
SMART FOAMS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The interfacial and foam properties of a model system based on the mixture between myristic acid and choline hydroxide have been investigated as a function of the molar ratio (R) between these two components and temperature. The aim of this study was to obtain insight on the links between the self-assemblies in bulk and in the foam liquid channels, the surfactant packing at the interface, and the resulting foam properties and stability. A multiscale approach was used combining small angle neutron scattering, specular neutron reflectivity, surface tension measurements, and photography. We highlighted three regimes of foam stability in this system by modifying R: high foam stability for R < 1, intermediate at R ∼ 1, and low for R > 1. The different regimes come from the pH variations in bulk linked to R. The pH plays a crucial role at the molecular scale by setting the ionization state of the myristic acid molecules adsorbed at the gas-liquid interface, which in turn controls both the properties of the monolayer and the stability of the films separating the bubbles. The main requirement to obtain stable foams is to set the pH close to the pKa in order to have a mixture of protonated and ionized molecules giving rise to intermolecular hydrogen bonds. As a result, a dense monolayer is formed at the interface with a low surface tension. R also modifies the structure of self-assembly in bulk and therefore within the foam, but such a morphological change has only a minor effect on the foam stability. This study confirms that foam stability in surfactant systems having a carboxylic acid as polar headgroup is mainly linked to the ionization state of the molecules at the interface.
Fil: Arnould, Audrey. No especifíca;
Fil: Cousin, Fabrice. No especifíca;
Fil: Salonen, Anniina. No especifíca;
Fil: Saint Jalmes, Arnaud. Centre National de la Recherche Scientifique; Francia
Fil: Perez, Adrián Alejandro. Universidad Nacional del Litoral; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina
Fil: Fameau, Anne Laure. No especifíca;
description The interfacial and foam properties of a model system based on the mixture between myristic acid and choline hydroxide have been investigated as a function of the molar ratio (R) between these two components and temperature. The aim of this study was to obtain insight on the links between the self-assemblies in bulk and in the foam liquid channels, the surfactant packing at the interface, and the resulting foam properties and stability. A multiscale approach was used combining small angle neutron scattering, specular neutron reflectivity, surface tension measurements, and photography. We highlighted three regimes of foam stability in this system by modifying R: high foam stability for R < 1, intermediate at R ∼ 1, and low for R > 1. The different regimes come from the pH variations in bulk linked to R. The pH plays a crucial role at the molecular scale by setting the ionization state of the myristic acid molecules adsorbed at the gas-liquid interface, which in turn controls both the properties of the monolayer and the stability of the films separating the bubbles. The main requirement to obtain stable foams is to set the pH close to the pKa in order to have a mixture of protonated and ionized molecules giving rise to intermolecular hydrogen bonds. As a result, a dense monolayer is formed at the interface with a low surface tension. R also modifies the structure of self-assembly in bulk and therefore within the foam, but such a morphological change has only a minor effect on the foam stability. This study confirms that foam stability in surfactant systems having a carboxylic acid as polar headgroup is mainly linked to the ionization state of the molecules at the interface.
publishDate 2018
dc.date.none.fl_str_mv 2018-09
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/11336/152920
Arnould, Audrey; Cousin, Fabrice; Salonen, Anniina; Saint Jalmes, Arnaud; Perez, Adrián Alejandro; et al.; Controlling Foam Stability with the Ratio of Myristic Acid to Choline Hydroxide; American Chemical Society; Langmuir; 34; 37; 9-2018; 11076-11085
0743-7463
CONICET Digital
CONICET
url http://hdl.handle.net/11336/152920
identifier_str_mv Arnould, Audrey; Cousin, Fabrice; Salonen, Anniina; Saint Jalmes, Arnaud; Perez, Adrián Alejandro; et al.; Controlling Foam Stability with the Ratio of Myristic Acid to Choline Hydroxide; American Chemical Society; Langmuir; 34; 37; 9-2018; 11076-11085
0743-7463
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.langmuir.8b02261
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432