RT Journal Article
T1 Aggregation phenomena on the ternary ionic-nonionic surfactant system: didodecyldimethylammonium bromide/octyl-beta-D-glucopyranoside/water. Mixed microaggregates, vesicles, and micelles
A1 Junquera González, María Elena
A1 Del Burgo, Patricia
A1 Arranz, Rocío
A1 Llorca, Óscar
A1 Aicart Sospedra, Emilio
AB The formation of a variety of mixed colloidal aggregates has been investigated on a ternary ionic−nonionic system constituted by (i) a double-chain cationic surfactant with a 12-carbon atom hydrophobic tail, didodecyldimethylammonium bromide (di-C12DMAB), (ii) a nonionic single-chain surfactant, octyl-β-d-glucopyranoside (OBG), and (iii) water. The study has been carried out by means of conductivity, ζ-potential, transmission electron microscopy (TEM), and cryogenic transmission electron microscopy (cryo-TEM) experiments on the highly diluted, very diluted, and moderately diluted regions. The formation of mixed microaggregates, prior to the appearance of mixed vesicles, has been undoubtly confirmed by conductivity, TEM, and ζ-potential results. The concentrations at which these mixed colloidal aggregates form, i.e., the mixed critical microaggregate concentration (CAC*), the mixed critical vesicle concentration (CVC*), and the mixed critical micelle concentration (CMC*), have been determined from conductivity data, while the ζ-potential experiments allow for the characterization of the aggregate/solution interface. The shape and size of the microaggregates and vesicles have been evaluated from TEM and cryo-TEM micrographs, respectively. All of the experimental evidence has been also analyzed in terms of the theoretical packing parameter, P.
PB ACS
YR 2005
FD 2005
LK https://hdl.handle.net/20.500.14352/130005
UL https://hdl.handle.net/20.500.14352/130005
LA eng
NO Langmuir 2005, 21, 5, 1795–1801
NO MEC
DS Docta Complutense
RD 20 ene 2026