Influence of cetyltrimethylammonium bromide ...
Type de document :
Article dans une revue scientifique: Article original
URL permanente :
Titre :
Influence of cetyltrimethylammonium bromide and hydroxide ions on the interfacial tension and stability of emulsions of dodecane in aqueous silicate solutions
Auteur(s) :
Bertin, Matthieu [Auteur]
Laboratoire d’étude des Ciments et Bitumes pour le Conditionnement [LCBC]
Gomes Rodrigues, Donatien [Auteur]
Laboratoire d’étude des Ciments et Bitumes pour le Conditionnement [LCBC]
Pierlot, Christel [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Albert-Mercier, Cyrille [Auteur]
Laboratoire des Matériaux Céramiques et Procédés Associés - EA 2443 [LMCPA]
DAVY, Catherine [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Lambertin, David [Auteur]
Laboratoire d’étude des Ciments et Bitumes pour le Conditionnement [LCBC]
Rataj, Véronique [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Laboratoire d’étude des Ciments et Bitumes pour le Conditionnement [LCBC]
Gomes Rodrigues, Donatien [Auteur]
Laboratoire d’étude des Ciments et Bitumes pour le Conditionnement [LCBC]
Pierlot, Christel [Auteur]

Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Albert-Mercier, Cyrille [Auteur]
Laboratoire des Matériaux Céramiques et Procédés Associés - EA 2443 [LMCPA]
DAVY, Catherine [Auteur]

Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Lambertin, David [Auteur]
Laboratoire d’étude des Ciments et Bitumes pour le Conditionnement [LCBC]
Rataj, Véronique [Auteur]

Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Titre de la revue :
Colloids and Surfaces A: Physicochemical and Engineering Aspects
Nom court de la revue :
Colloids and Surfaces A: Physicochemical and Engineering Aspects
Numéro :
628
Pagination :
127306
Éditeur :
Elsevier
Date de publication :
2021-11-05
ISSN :
0927-7757
Mot(s)-clé(s) en anglais :
silicate
emulsion
dodecane
tensiometry
SWAXS
emulsion
dodecane
tensiometry
SWAXS
Discipline(s) HAL :
Chimie/Matériaux
Chimie/Chimie organique
Chimie/Chimie organique
Résumé en anglais : [en]
This manuscript provides an understanding of the emulsification mechanisms of a model alkane (dodecane) in concentrated aqueous sodium silicate solutions, for e.g. formulating alkane/geopolymer composites for varied ...
Lire la suite >This manuscript provides an understanding of the emulsification mechanisms of a model alkane (dodecane) in concentrated aqueous sodium silicate solutions, for e.g. formulating alkane/geopolymer composites for varied applications. To this purpose, we assume that silicate oligomers stabilize the emulsion by positioning themselves at the interface between alkane/aqueous solution. Moreover, the addition of an alkyltrimethylammonium, which interacts with silicate oligomers, is assumed to favor their positioning at the interface to increase the stability of the emulsion by Pickering effect. First, we study the influence of sodium silicate and hydroxide concentrations with up to 6 mol⋅L-1 (NaOH and SiO2) on the interfacial tension (γ) between dodecane and water. Secondly, we study the effect of CetylTrimethyl Ammonium Bromide (CTAB) and DecylTrimethylAmmonium Bromide (DeTAB) on the interfacial tension and the stability of the emulsion. Adding CTAB surfactant leads to partial precipitation but significantly decreases the interfacial tension to less than 4 mN.m-1. These effects that are not observed with DeTAB. The precipitate corresponds to CTAB-silicates and seems to contribute to the stabilization of the water/dodecane system, presumably through Pickering effect. Moreover, emulsion stability is shown to be related to the condensation/decondensation state of silicate species.Lire moins >
Lire la suite >This manuscript provides an understanding of the emulsification mechanisms of a model alkane (dodecane) in concentrated aqueous sodium silicate solutions, for e.g. formulating alkane/geopolymer composites for varied applications. To this purpose, we assume that silicate oligomers stabilize the emulsion by positioning themselves at the interface between alkane/aqueous solution. Moreover, the addition of an alkyltrimethylammonium, which interacts with silicate oligomers, is assumed to favor their positioning at the interface to increase the stability of the emulsion by Pickering effect. First, we study the influence of sodium silicate and hydroxide concentrations with up to 6 mol⋅L-1 (NaOH and SiO2) on the interfacial tension (γ) between dodecane and water. Secondly, we study the effect of CetylTrimethyl Ammonium Bromide (CTAB) and DecylTrimethylAmmonium Bromide (DeTAB) on the interfacial tension and the stability of the emulsion. Adding CTAB surfactant leads to partial precipitation but significantly decreases the interfacial tension to less than 4 mN.m-1. These effects that are not observed with DeTAB. The precipitate corresponds to CTAB-silicates and seems to contribute to the stabilization of the water/dodecane system, presumably through Pickering effect. Moreover, emulsion stability is shown to be related to the condensation/decondensation state of silicate species.Lire moins >
Langue :
Anglais
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille
Centrale Lille
ENSCL
Univ. Artois
Université de Lille
Collections :
Équipe(s) de recherche :
Chimie, matériaux et procédés pour un nucléaire durable (CIMEND)
Colloïdes catalyse oxydation (CÏSCO)
Colloïdes catalyse oxydation (CÏSCO)
Date de dépôt :
2022-03-24T09:02:42Z
2023-05-09T14:49:30Z
2023-05-09T14:49:30Z