Abstract
In order to increase petroleum oil recovery, the wettability of the interface between flooding aqueous solution and oil reservior plays an important role. A surfactant dissolved in the flooding solution can be adsorbed on the reservior surface and then the wettability of the interface can be changed. For the purpose of mimic oil recovery, a cationic gemini surfactant, ethanediyl-α, β -bis(cetyldimethylammonium bromide) (16-2-16), was synthesized and characterized. The dynamic surface and interface tensions have been measured using pendant drop method at the air-water surface and dodecane-water interface, and experimental curve is close to orientation model and interaction model of surface equations of state. Compared with conventional cationic surfactants, cetyldimethylammonium bromide (CTAB), 16-2-16 has very low cmc value (1.8 × 10− 5 mol/L to 1.0 × 10− 3 mol/L). The most hydrophilic condition between the surfactant aqueous solution and the silica powder surface appears near the cmc for both 16-2-16 and CTAB. The best mimic oil recovery is also reached around the cmc for the two surfactants, but the efficiency for the former (68%) is higher than the one for the latter (63%).
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Bi, Z.C., Qi, L.Y. & Liao, W.S. Dynamic surface properties, wettability and mimic oil recovery of ethanediyl- α, β -bis(cetyldimethylammonium bromide) on dodecane modified silica powder. J Mater Sci 40, 2783–2788 (2005). https://doi.org/10.1007/s10853-005-2408-7
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DOI: https://doi.org/10.1007/s10853-005-2408-7