Adsorption of Polar Species at Crude Oil-Water Interfaces: the Chemoelastic Behavior.

ABSTRACT: We investigate the formation and properties of crude oil/water interfacial films. The time evolution of interfacial tension suggests the presence of short and long timescale processes reflecting the competition between different populations of surface-active molecules. We measure both the time-dependent shear and extensional interfacial rheology moduli. Late-time interface rheology is dominated by elasticity, which results in visible wrinkles on the crude oil drop surface upon interface disturbance. We also find that the chemical composition of the interfacial films is affected by the composition of the aqueous phase that it has contacted. For example, sulfate ions promote films enriched with carboxylic groups and condensed aromatics. Finally, we perform solution exchange experiments and m

SUBMITTER: Saad AM 

PROVIDER: S-EPMC9161445 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature