ZetaPALS测量应用案例-2016-27

DOSS (dioctyl sodium sulfosuccinate), Tween 80, and Span 80, surfactants commonly used in marine crude oil spill dispersants, have been mixed into a model oil at a total surfactant concentration of 2 wt%, typical for dispersant-treated oil slicks. These surfactant-oil blends also contained 0.5-1.5 wt% synthetic seawater to enable formation of water-in-oil (W/O) microstructures. Trends in dynamic oil-seawater interfacial tension (IFT) as a function of surfactant blend composition are similar to those observed in prior work for crude oil treated with similar blends of these surfactants. In particular, Span 80-rich surfactant blends exhibit much slower initial dynamic IFT decline than DOSS-rich surfactant blends in both model oil and crude oil, and surfactant blends containing 50 wt% Tween 80 and a DOSS:Span 80 ratio near 1:1 produce ultralow IFT in the model oil (< 10-4 mN/m) just as similar surfactant blends do in crude oil.