K. Lv, Wenjian Huang, S. Wang
Jul 10, 2019
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Influential Citations
2
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Journal
Journal of Dispersion Science and Technology
Abstract
Abstract The organic salt sodium 1-naphthalenesulfonate (SNS) with two conjugated structures was introduced to evaluate its effects on the interfacial activity of three cationic surfactants (1-dodecyl-3-methylimidazolium bromide (M12), N-dodecyl-N-methylpyrrolidinium bromide (L12), and dodecyltrimethylammonium bromide (DTAB)) at water/model oil interface. The intermolecular interactions of surfactants/SNS, mainly including electrostatic attraction and π-π stacking interaction, dominated the amplitudes of IFT reduction. Another three salts and two surfactants were employed in control experiments to demonstrate the essential roles of π-π stacking interaction and electrostatic attraction in the dramatic IFT reduction, respectively. Furthermore, the proposed models about the surfactant/salt interfacial interaction were repeatedly confirmed by the calculations of their interaction energies and the investigations on the effects of NaCl and temperature. In addition, the M12/SNS system with the optimum interfacial activity showed the remarkable ability to improve crude oil recovery. Graphical Abstract