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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/152920
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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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1844613430335504384 |
score |
13.070432 |