Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12104/64319
Full metadata record
DC FieldValueLanguage
dc.contributor.authorMacIas, E.R.
dc.contributor.authorBautista, F.
dc.contributor.authorPerez-Lopez, J.H.
dc.contributor.authorSchulz, P.C.
dc.contributor.authorGradzielski, M.
dc.contributor.authorManero, O.
dc.contributor.authorPuig, J.E.
dc.contributor.authorEscalante, J.I.
dc.date.accessioned2015-11-19T18:49:16Z-
dc.date.available2015-11-19T18:49:16Z-
dc.date.issued2011
dc.identifier.urihttp://hdl.handle.net/20.500.12104/64319-
dc.description.abstractThe influence of ionic strength on the rheological properties of polymer-like aqueous micellar solutions of cetyltrimethylammonium tosylate (CTAT) containing different salts (KCl, KBr, (COONa)2, K 2SO4 or K3PO4) is investigated. The rheological behavior of the solutions is analyzed above the concentration where a micellar entanglement network is formed, varying surfactant and salt concentration, salt counterion valency and temperature. A master curve of the linear viscoelastic properties is obtained by multiple superposition of time, temperature, salt type, and surfactant and salt concentration. Application of the existent kinetic theory provides information suggesting that the micellar solutions are in the fast breaking regime (i.e., the relaxation is kinetically controlled) regardless of salt type and concentration. Moreover, these solutions exhibit shear-banding flow with a reduced stress plateau (σ/G 0, being σ and G0 the shear stress and the plateau modulus, respectively) that increases with salt content and counterion valency. The zero-shear viscosity (η0) and the main relaxation time (τC) diminish with increasing salt content according to a step-like function, in which the number of steps increases with the salt counterion valence. In contrast, G0 only increases slightly with increasing salt content for the five salts employed. These results are discussed in terms of ionic strength and screening of the electrostatic-interactions caused by the addition of salt. In addition, it was found that the influence of anions on the viscoelastic properties of the polymer-like micelles follows the Hofmeister series commonly encountered in macromolecular and biological systems. This finding opens a challenge for scientists in the experimental and theoretical fields. © 2011 The Royal Society of Chemistry.
dc.titleEffect of ionic strength on rheological behavior of polymer-like cetyltrimethylammonium tosylate micellar solutions
dc.typeArticle
dc.identifier.doi10.1039/c0sm00739k
dc.relation.ispartofjournalSoft Matter
dc.relation.ispartofvolume7
dc.relation.ispartofissue5
dc.relation.ispartofpage2094
dc.relation.ispartofpage2102
dc.contributor.affiliationMacÍas, E.R., Departamento de Ingeniería Química, Universidad de Guadalajara, Boul. M. García Barragán # 1451, Guadalajara Jal. 44430, Mexico; Bautista, F., Departamento de Física, Universidad de Guadalajara, Boul. M. García Barragán # 1451, Guadalajara Jal. 44430, Mexico; Pérez-López, J.H., Departamento de Ingeniería Química, Universidad de Guadalajara, Boul. M. García Barragán # 1451, Guadalajara Jal. 44430, Mexico; Schulz, P.C., Departamento de Química, Universidad Nacional Del sur, Bahía Blanca 8000, Argentina; Gradzielski, M., Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 124, Sekr. TC7 D-10623, Berlin, Germany; Manero, O., Instituto de Investigaciones en Materiales, UNAM, Apdo. Postal 70-360, México City DF 04510, Mexico; Puig, J.E., Departamento de Ingeniería Química, Universidad de Guadalajara, Boul. M. García Barragán # 1451, Guadalajara Jal. 44430, Mexico; Escalante, J.I., Departamento de Química, Universidad de Guadalajara, Boul. M. García Barragán # 1451, Guadalajara Jal. 44430, Mexico
dc.relation.isReferencedByScopus
dc.relation.isReferencedByWOS
dc.identifier.urlhttp://www.scopus.com/inward/record.url?eid=2-s2.0-79951890756&partnerID=40&md5=2c00157d59365aa80993344bfcb12386
Appears in Collections:Producción científica UdeG (prueba)

Files in This Item:
There are no files associated with this item.


Items in RIUdeG are protected by copyright, with all rights reserved, unless otherwise indicated.