01694nab a2200205 4500 20260520000816.0 260224s2009 xxu Heavy oil-water interfacial properties and emulsion stability Influence of dilution ene. 2009 15/05/2009 ; 15/04/2009 5 p. ; 294-299 Transcripción del resúmen publicado por el autor: We have performed a study of dynamic interfacial tension and rheology of interfaces between water and either crude oil diluted in toluene or in a model oil consisting of toluene, in which pentane-extracted asphaltenes were redissolved. We show that the break point of the curve interfacial tension versus asphaltene concentration is not related to an eventual critical aggregation concentration but rather to the collapse of the asphaltene surface layer. As for other amphiphilic species that adsorb irreversibly at an oil-water interface, the corresponding emulsion stability increases with the amphiphile concentration, even above the collapse point. The behavior of diluted crude oil and model oil are quite similar. However, the surface layers evolve over longer time scales in the case of diluted crude oil, probably because of the contribution of resins that form less polar aggregates with asphaltenes. This results in less stable emulsions, especially before the collapse point. Energy & fuels 23 ARTICULO Alvarez, Gabriela 40899 Poteau, Sandrine 40900 Arigillier, Jean-Francois 40901 169569 169569 http://pubs.acs.org/doi/full/10.1021/ef800545k 0 0 0 0 237388 BVIAPG BVIAPG 2026-03-05 200044372 0 200044372 2026-03-05 15:11:46 2026-03-05 ARTICULO