DETERMINATION OF FUNCTIONAL PROPERTIES OF AQUEOUS SURFACTANT SOLUTIONS PRODUCED BY LLC SHIKH
Authors:
1.
KNITU
2.
Kazan National Research Technological University
3.
Kazan National Research Technological University
(Department of General Chemical Technology, Assistant)
employee from 01.01.2024 to 01.01.2025
Kazan, Kazan, Russian Federation
employee from 01.01.2024 to 01.01.2025
Kazan, Kazan, Russian Federation
Type:
Article
Pages:
from 146
to 149
Status:
Published
Received:
24.12.2025
Accepted:
21.01.2026
Published:
26.02.2026
Language:
Russian
Keywords:
SURFACE TENSION, SURFACTANTS (SURFACE-ACTIVE AGENTS), PARTICLE SIZE, ZETA POTENTIAL, CRITICAL MICELLE CONCENTRATION
Abstract:
The functional properties of surfactants produced by LLC “Shebekinskaya Industrial Chemistry” were investigated:SN-22Sh and SN-MB - blends of anionic and nonionic surfactants,SN-20-z - a nonionic surfactant. Surface tension measurements were carried out using a KRUSS tensiometer. The results revealed that all tested samples exhibit high surface activity and are capable of forming colloidal aggregates, with CMC values ranging from 0.25 to 0.5 g/L. Among the studied formulations, SN-20-z stands out: even at a low concentration of 0.0625 g/L, it causes a sharp reduction in surface tension-from 72.0 to 35.0 mN/m-after which further increases in concentration have practically no effect on the shape of the surface tension isotherm. Particle size and zeta potential measurements were performed using a Malvern Zetasizer Nano particle analyzer. Both nano- and microparticles were detected in the samples. The minimum hydrodynamic radius prior to CMC was 99.3 nm for SN-22Sh, while the maximum was observed for SN-20-z. Above the CMC, particle sizes increased further, reaching 294.6 nm and 625.7 nm, respectively. In contrast, SN-MB showed no significant change in particle size before and after micellization, remaining within 241.1-257.8 nm. Aggregation stability was observed for SN-22Sh starting at concentrations of 4.0 g/L and for SN-MB from 0.4 g/L. However, for SN-20-z, no concentration yielded aggregation stability: zeta potential values never entered the stability range (|ζ| > 30 mV) across the entire tested concentration interval, indicating a tendency toward rapid flocculation.
The functional properties of surfactants produced by LLC “Shebekinskaya Industrial Chemistry” were investigated:SN-22Sh and SN-MB - blends of anionic and nonionic surfactants,SN-20-z - a nonionic surfactant. Surface tension measurements were carried out using a KRUSS tensiometer. The results revealed that all tested samples exhibit high surface activity and are capable of forming colloidal aggregates, with CMC values ranging from 0.25 to 0.5 g/L. Among the studied formulations, SN-20-z stands out: even at a low concentration of 0.0625 g/L, it causes a sharp reduction in surface tension-from 72.0 to 35.0 mN/m-after which further increases in concentration have practically no effect on the shape of the surface tension isotherm. Particle size and zeta potential measurements were performed using a Malvern Zetasizer Nano particle analyzer. Both nano- and microparticles were detected in the samples. The minimum hydrodynamic radius prior to CMC was 99.3 nm for SN-22Sh, while the maximum was observed for SN-20-z. Above the CMC, particle sizes increased further, reaching 294.6 nm and 625.7 nm, respectively. In contrast, SN-MB showed no significant change in particle size before and after micellization, remaining within 241.1-257.8 nm. Aggregation stability was observed for SN-22Sh starting at concentrations of 4.0 g/L and for SN-MB from 0.4 g/L. However, for SN-20-z, no concentration yielded aggregation stability: zeta potential values never entered the stability range (|ζ| > 30 mV) across the entire tested concentration interval, indicating a tendency toward rapid flocculation.
Keywords:
SURFACE TENSION, SURFACTANTS (SURFACE-ACTIVE AGENTS), PARTICLE SIZE, ZETA POTENTIAL, CRITICAL MICELLE CONCENTRATION
SURFACE TENSION, SURFACTANTS (SURFACE-ACTIVE AGENTS), PARTICLE SIZE, ZETA POTENTIAL, CRITICAL MICELLE CONCENTRATION
