Naslov
Formation of Vesicles in Diluted Aqueous Solutions of Surfactant Investigated by Direct Analysis of Light Scattering

Autori
Šegota, Suzana ; Težak, Đurđica ; Ljubešić, Nikola

Izvornik
Advances in colloid and interface science (0001-8686) 89-90 (2001), 1-3; 283-291

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Double-tailed surfactant ; Light scattering ; Vesicles

Sažetak
Formation of aggregates in the binary systems of double-tailed surfactant, sodium 4-(1-pentylheptyl)benzenesulfonate, and water in the dilute regime was supposed to occur within 5.0-8.5% of surfactant concentration. The size of particles was determined by light scattering. In addition, the samples were observed at room temperature using an Axiovert 35 Zeiss polarized light microscope operated with differential interference contrast optics. The observed aggregates could, in theory, to belong a vesicle phase. All the histograms obtained by light scattering show a bimodal distribution of particles. Weight factors including intensity, volume and number distribution indicate 97–100% of small aggregate sizes, since the peaks for the big sizes indicate only a small number of the aggregate population. Small aggregates have shown monodispersity with diameters of the aqueous core amounting to 38.94 and 54.94 nm relating to the surfactant concentration of 6.0 and 8.0%, respectively. Hydrodynamic radii determined by the Cumulant method, by the inverse Laplace transformation, and using a plot 1/ vs. q2, showed values within the usual precision limit.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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