Aggregation number and critical micellar concentration of surfactant determined by time-dependent static light scattering (TDSLS) and conductivity
Résumé
The use of an automatic continuous mixing (ACM) technique which includes time-dependent static light scattering (TDSLS), refractometric and conductimetric detectors allowed detailed measurements of colloid solutions to be made while varying ionic strength. A ionic surfactant, sodium dodecylsulfate (SDS), was used in NaCl solutions. The critical micellar concentration, CMC, the ionization degree α, the aggregation number and the second virial coefficient were determined. The method has several advantages over traditional manual methods in terms of accuracy, sample preparation, and being less tedious. © 2004 Elsevier B.V. All rights reserved.
Mots clés
Agglomeration
Micelles
Automatic continuous mixing (ACM)
Ionic surfactants
Sodium dodecylsulfate (SDS)
Time-dependent static light scattering (TDSLS)
Surface active agents
dodecyl sulfate sodium
ionic surfactant
sodium chloride
accuracy
article
colloid
concentration (parameters)
conductance
ionic strength
ionization
light scattering
micelle
priority journal
refractometry