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Título

Phase and rheological behavior of the polymerizable surfactant CTAVB and water

Autor Soltero, J. F. A.; Álvarez-Ramírez, J. G.; Fernández, V. V. A.; Tepale, N.; Bautista, F.; Macías, E. R.; Pérez-López, J. H.; Schulz, P. C.; Manero, O.; Solans, Conxita; Puig, J. E.
Palabras clave Phase behavior
Linear viscoelasticity
Nonlinear viscoelasticity
Shear-banding flow
Polymerizable surfactant
Fecha de publicación 19-jun-2006
EditorElsevier
Citación Journal of Colloid and Interface Science 312(1): 130-138 (2007)
ResumenThe phase and rheological behaviors of the polymerizable surfactant, cetyltrimethylammonium benzoate (CTAVB), and water as a function of surfactant concentration and temperature are investigated here. The critical micelle concentration (cmc) and the (cmc2), as well as the Krafft temperature (TK), are reported. A large highly viscous micellar solution region and hexagonal- and lamellar-phase regions were identified. The micellar solutions exhibit shear thickening in the dilute regime, below the overlapping or entanglement concentration. At higher concentrations, wormlike micelles form and the solutions show strong viscoelasticity and Maxwell behavior in the linear regime and shear banding flow in the nonlinear regime. The linear viscoelastic regime is analyzed with the Granek–Cates model, showing that the relaxation is controlled by the kinetics of reformation and scission of the micelles. The steady and unsteady responses in the nonlinear regime are compared with the predictions of the Bautista–Manero–Puig (BMP) model. Model predictions follow the experimental data closely.
Descripción 9 pages, 10 figures.-- PMID: 17547934 [PubMed].-- Supporting information (Suppl. figures SM1-SM4) available at: http://dx.doi.org/10.1016/j.jcis.2006.08.001
Printed version published on Aug 1, 2007.
Versión del editorhttp://dx.doi.org/10.1016/j.jcis.2006.08.001
URI http://hdl.handle.net/10261/9699
DOI10.1016/j.jcis.2006.08.001
ISSN0021-9797
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