The Adsorption Property of Wettability Reversal Surfactant

In order to understand the adsorption property of wettability reversal surfactant, the adsorption rule of the wettability reversal surfactant on hydrophilic surface and lipophilic surface was studied, and the adsorption behavior of the wettability reversal surfactant on hydrophilic surface and lipophilic surface was studied by Atomic Force Microscope (AFM). The results show that there is a saturated adsorption capacity of all the wettability reversal surfactants on sandstone surface, and the adsorption quantity on lipophilic surface is bigger than that on hydrophilic surface. The AFM study show that the wettability reversal surfactant tends to distribute where is close to the oil droplet. Consequently, the wettability reversal surfactant is favorable for using in lipophilic surface.