onventional and gemini anionic sulphonate surfactants of variable alkyl chain length (8, 10, and 12 carbon atoms), were synthesized by three steps reactions using ethylenediamine, alkyl halides and sodium
3-chloro-2-hydroxypropane-1-sulfonate. Various spectroscopic tools (i.e., 1H and 13C NMR and IR spectra)
were used to clarify the structures of synthesized surfactants. The solution surface properties of synthesized surfactants were studied by critical micelle concentration (CMC). Both maximum surface excess and
minimum surface area per surfactant molecule were measured. Besides, the adsorption and micellization
performance of the synthesized surfactants, which were estimated by the parameter of free adsorption
energy (G0
ads) and micellization (G0
mic) were measured. Moreover, the behavior of the synthesized surfactants as petroleum-collecting or dispersing agents has been studied in solid and diluted forms in water
with different salinity. The results indicate that the synthesized surfactants possess superior petroleumdispersing properties in water solutions of different salinity. Whereas the dispersing effect was improved
by rising the hydrophobicity of these compounds. Furthermore, all the synthesized conventional and gemini anionic surfactants have a high ability to adsorb at the surface than micellized in the solution. |
