A series
of cationic gemini surfactants, N,N′-bis(alkyl)-N,N′-bis(2-hydroxypropyl)ethylenediammonium
dibromide, [C
n
H2n+1(CH3CH(OH)CH2)NH(CH2)2NH(CH2CH(OH)CH3)C
n
H2n+1]Br2 (where n is the
tail chain length, n = 9, 12, and 14), referred to
as C
n
C2C
n
[iso-Pr(OH)] was synthesized. Via conductometric and tensiometric
methods, at different temperatures (283 to 313 K), specific electrical
conductivities and surface tensions of the aqueous solutions of these
cationic gemini surfactants were determined. According to the obtained
values, micellization and adsorption parameters such as critical micellization
concentration (CMC), maximum surface excess (Γmax), minimal cross sectional surface area of surfactant polar group
(A
min), adsorption efficiency (pC20), surface pressure (π), and binding degree of counterion
(β) were calculated. The values of standard Gibbs free energy
(ΔG°), enthalpy (ΔH°), and entropy (ΔS°) were also
computed. Via the dynamic light scattering method, diameters of aggregates
of the synthesized cationic gemini surfactants were determined in
water. It was established that the diameters of these aggregates decrease
with a temperature rise. Antibacterial properties of the synthesized
cationic surfactants against sulfate-reducing bacteria (SRB) were
studied.
The results of comparative experimental studies of the effect of various widely used surfactants, as well as sugar refinery waste - after yeast molasses and vinasse on the wettability of the interaction surface during the in-field pipeline transport of oils from fields in the southern region of Azerbaijan and can be successfully used, especially in winter, to regulate fluidity highly emulsion and low solidifying oils. It is shown that the addition of the considered reagents leads to an increase in the contact angle cosine. The effect of the proposed reagents on the fluidity of oil samples with bound and free water, the composition of aqueous solutions of various reagents, as well as the pH of solutions of these reagents on the fluidity of oil samples has been evaluated.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.