English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/9702
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Citado 25 veces en Web of Knowledge®  |  Pub MebCentral Ver citas en PubMed Central  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar EndNote (RIS)Exportar EndNote (RIS)
Título

Short haired wormlike micelles in mixed nonionic fluorocarbon surfactants

Autor Sharma, Suraj Chandra; Rodríguez-Abreu, Carlos; Shrestha, Lok Kumar; Aramaki, Kenji
Palabras clave Fluorocarbon surfactants
Oligomers
Wormlike micelles
Rheological behavior
Small-angle X-ray scattering
Fecha de publicación 29-may-2007
EditorElsevier
Citación Journal of Colloid and Interface Science 314(1): 223-229 (2007)
ResumenWe have studied the rheological behavior of viscoelastic wormlike micellar solution in a mixed system of nonionic fluorinated surfactants, perfluoroalkyl sulfonamide ethoxylate, C8F17SO2N(C3H7)(CH2CH2O)nH abbreviated as C8F17EOn (n = 10 and 20). Above critical micelle concentration, the surfactant, C8F17EO20 forms small spherical micelles in water and the viscosity of the solution remains constant regardless of the shear rate, i.e., the solutions exhibit Newtonian behavior. However, upon successive addition of the C8F17EO10 the viscosity of the solution increases and at certain C8F17EO10 concentration, shear-thinning behavior is observed indicating the formation wormlike micelles. Contrary to what is expected, there is a viscosity increase with the addition of the hydrophilic C8F17EO20 to C8F17EO10 aqueous solutions at certain temperature and concentration, which could be attributed to an increase in rigidity of the surfactant layer and to the shifting of micellar branching to higher temperatures. The oscillatory-shear rheological behavior of the viscoelastic solution can be described by Maxwell model at low frequency. Small-angle X-ray scattering (SAXS) measurements confirmed the formation of small spherical micellar aggregates in the dilute aqueous C8F17EO20 solution. The SAXS data shows the one-dimensional growth on the micellar size with increase in the C8F17EO10 concentration. Thus, the present SAXS data supports the rheological data.
Descripción 7 pages, 8 figures.-- PMID: 17588597 [PubMed].-- Printed version published on Oct 1, 2007.
Versión del editorhttp://dx.doi.org/10.1016/j.jcis.2007.05.066
URI http://hdl.handle.net/10261/9702
DOI10.1016/j.jcis.2007.05.066
ISSN0021-9797
Aparece en las colecciones: (IQAC) Artículos
Ficheros en este ítem:
No hay ficheros asociados a este ítem.
Mostrar el registro completo
 



NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.