On the reversibility of asphaltene adsorption at oil-water interfaces

被引：44

作者：

Cagna, Alain ^{[1
]}

Esposito, Gerard ^{[1
]}

Quinquis, Anne-Sophie ^{[1
]}

Langevin, Dominique ^{[1
]}

机构：

[1] Teclis Sci, Le Valvert 46 Bis,Chemin Vieux Moulin, F-69160 Tassin La Demi Lune, France

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2018年 / 548卷

关键词：

Asphaltenes adsorption; Oil-water interfaces; Adsorption reversibility; Liquid bridge instrument; IN-HYDROCARBON EMULSIONS; ANGLE NEUTRON-SCATTERING; CRUDE-OIL; PART; SURFACTANT SOLUTIONS; LADEN INTERFACES; STABILITY; RELAXATION; MONOLAYERS; KINETICS;

D O I：

10.1016/j.colsurfa.2018.03.038

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The irreversibility of asphaltene adsorption at oil-water interfaces is still debated in the literature. We have used a Tracker instrument (Teclis) in which both liquid drops and bridges can be analyzed and interfacial tensions measured. Rinsing in the liquid bridge configuration is possible, making possible the study of opaque fluids. We confirmed that asphaltene adsorption is irreversible, for bulk concentrations below and above the CNAC, even at short times, when the interfacial layers are not yet consolidated. Despite working with a highly purified sample and avoiding part of the problems linked to the competition of different species for the interface, we did not observe significant differences in adsorption times and in the behavior upon compression with respect to asphaltenes with wider mass distribution.

引用

页码：46 / 53

页数：8

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