Altering the wettability of bitumen-treated glass surfaces with ionic surfactants

摘要: Abstract The abilities of three ionic surfactants—sodium methylnaphthalene sulfonate (SMNS), sodium dodecyl sulfate (SDS), and cetyl trimethylammonium bromide (CTAB)—to alter the wettability bitumen-treated glass surfaces was examined. Surface characterized by contact angles, all measurements were carried out under alkaline conditions having carbonate (Na 2 CO 3 ) dissolved in aqueous phase. It found that Na alone could slightly increase hydrophilcity surfaces. With surfactants added to system, it demonstrated SMNS SDS (both anionic surfactants) much more effective enhancing water comparison CTAB (a cationic surfactant). X-ray photoelectron spectroscopy (XPS) analyses also conducted determine functional groups relative mass concentrations various elements on substrates. Based these results, we speculate most or adsorbed hydrocarbon material be removed from a substrate through synergistic effects between carbonate, which provides condition, surfactants, likely interacted with materials. This resulted dramatic alteration surfaces—from oil-wet water-wet.