BECAS
HAIDAR Carla Nahir
artículos
Título:
Physicochemical characterization of aqueous micellar systems formed by environmentally friendly salts
Autor/es:
ESTEFANÍA CORDISCO; CARLA N. HAIDAR; ROCÍO GOÑI; BIBIANA B. NERLI; LUCIANA P. MALPIEDI
Revista:
FLUID PHASE EQUILIBRIA
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2015 vol. 393 p. 111 - 116
ISSN:
0378-3812
Resumen:
In this work, environmentally friendly aqueous micellar two-phase systems containing nonionic surfactants (Triton X-114, Triton X-100 and Genapol X080) and organic salts (sodium citrate and sodium tartrate) were characterized. In order to accomplish this objective, the binodal diagrams (cloud point vs.surfactant concentration) were obtained for each condition. Additionally, critical micelle concentration(CMC) and micellar hydrodynamic diameter (DH) were determined for each system. According to the obtained results, it was found that the presence of salts lowered the CMC (DCMC up to 0.15 mM) and cloud point values (DCP up to 18 C) following the sequence: sodium citrate > sodium tartrate. In addition,the hydrodynamic diameters of the micelles were notoriously increased in presence of the studied salts,showing the high sensitivity of the described aqueous micellar two-phase systems to the medium condition. These results open perspectives for the use of greener aqueous micellar two-phase systems for bioseparation purposes.