Effects of Surfactant and Hydrophobic Nanoparticles on the Crude Oil-Water Interfacial Tension

Surfactants and nanoparticles play crucial roles in controlling the oil-water interfacial phenomenon. The natural oil-wet mineral that exist crude oil could remarkably affect water-oil characteristics. Most of recent studies focus on effect hydrophilic dispersed water phenomenon for nanoparticle enhanced recovery. However, impact existed behaviour are rare. In this study, impacts Span 80 surfactant hydrophobic SiO2 characteristics were studied by measuring dynamic equilibrium tensions. results show existence leading to higher tensions than those without at low concentrations below 2000 ppm. At a concentration 1000 ppm, increase tension caused is largest, which around 8.6 mN/m. For high concentrations, less significant obtained. was also investigated surfactant. data indicates influence presence This study confirms influences nanoparticle-surfactant interaction competitive molecule adsorption surfaces interface.