[en] The water/carbon dioxide (W/CO2) interfacial activity and emulsifying capacity of hydrocarbon and fluorinated carbohydrate esters are investigated of the first time and compared to the performance of sodium-bis(2-ethylhexyl)sulfosuccinate (AOT). The reduction of the W/CO2 interfacial tension was measured using a pendant drop tensiometer equipped with a cell view pressurized with CO2 at 80 bar and 45 °C. It was found that the interface stabilization improved in the order AOT < 6-O-myristoyl mannose < 6-O-(2H,2H,3H,3H-perfluoroundecanoyl)-D-mannose. In the latter case, a drastic reduction of the W/CO2 interfacial tension was observed (85% reduction, interfacial tension at the equilibrium = 3.6 mN/m), which emphasizes the advantage of using a fluorinated CO2-philic tail and the potential of sugars as hydrophilic head. The formulation of stable W/CO2 emulsions was also achieved using the fluorinated mannose derivative. This study paves the way to the design of a novel class of competitive surface active agents for W/CO2 emulsions.
Research Center/Unit :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Chemistry Materials science & engineering
Author, co-author :
Favrelle, Audrey; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Boyère, Cédric ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Tran, Kien My; IBS Institut de Biologie en Santé, Angers, France > Micro-Nanomédecines Biomimétiques
Alaimo, David ; Université de Liège - ULiège > Centre d'études et de rech. sur les macromolécules (CERM)
Calvignac, Brice; IBS Institut de Biologie en Santé, Angers, France > Micro-Nanomédecines Biomimétiques
Paquot, Michel ; Université de Liège - ULiège > Gembloux Agro-Bio Tech > Unit of Biological and Industrial Chemistry
Boury, Frank; IBS Institut de Biologie en Santé, Angers, France > Micro-Nanomédecines Biomimétiques
Jérôme, Christine ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Debuigne, Antoine ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
Surface activity of a fluorinated carbohydrate ester in water/carbon dioxide emulsions
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