English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/9702
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Short haired wormlike micelles in mixed nonionic fluorocarbon surfactants

AuthorsSharma, Suraj Chandra; Rodríguez-Abreu, Carlos ; Shrestha, Lok Kumar; Aramaki, Kenji
KeywordsFluorocarbon surfactants
Oligomers
Wormlike micelles
Rheological behavior
Small-angle X-ray scattering
Issue Date29-May-2007
PublisherElsevier
CitationJournal of Colloid and Interface Science 314(1): 223-229 (2007)
AbstractWe 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.
Description7 pages, 8 figures.-- PMID: 17588597 [PubMed].-- Printed version published on Oct 1, 2007.
Publisher version (URL)http://dx.doi.org/10.1016/j.jcis.2007.05.066
URIhttp://hdl.handle.net/10261/9702
DOI10.1016/j.jcis.2007.05.066
ISSN0021-9797
Appears in Collections:(IQAC) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.