RT Journal Article
T1 Effect of NaCl on the Self-Aggregation of n-Octyl â-D-Thioglucopyranoside in Aqueous Medium.
A1 Molina-Bolivar, Jose Antonio
A1 Hierrezuelo-Osorio, José Manuel
A1 Carnero-Ruiz, Cristóbal
K1 Micelas
K1 Electrólitos
K1 Agentes tensioactivos
AB This report investigates the effect of sodium chloride (NaCl) on the micellization, surface activity, and theevolution in the shape and size of n-octyl â-D-thioglucopyranoside (OTG) aggregates. By using surface tensionmeasurements, information was obtained on both changes in the critical micelle concentration and adsorptionbehavior in the air-liquid interface with the electrolyte concentration. These data were used to obtain thethermodynamic properties of micellization along with the corresponding adsorption parameters in the airliquidinterface. From extended static and dynamic light scattering measurements, the micelle molecular weight,the mean aggregation number, and the second virial coefficient, the apparent diffusion coefficient and themean hydrodynamic radius of micelles in a range of NaCl concentrations were obtained. The light scatteringdata have shown that when the surfactant concentration is lower to 4.5 g/L, only spherical micelles are formed.However, an increase in the surfactant concentration induces an increase in micellar size, suggesting a rodlikegrowth of the micelles. This deviation of micelle geometry from spherical to rodlike is supported both by theratio between the hydrodynamic radius and the radius of gyration and by the angular dependence of lightscattering. On the other hand, the studies performed in the presence of high NaCl concentration (0.2 and 0.5M) provide strong support for the view that the micelles may overlap together to form an entangled networkabove certain crossover concentration.
PB ACS
YR 2006
FD 2006-06-22
LK https://hdl.handle.net/10630/33288
UL https://hdl.handle.net/10630/33288
LA eng
NO J. Phys. Chem. B 2006, 110, 24, 12089–12095
NO https://v2.sherpa.ac.uk/id/publication/21299?template=romeo
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026