Advanced

Phase behavior of semifluorinated catanionic mixtures: Head group dependence and spontaneous formation of vesicles

Blanco, Elena LU ; Olsson, Ulf LU ; Ruso, Juan M.; Schulz, Pablo C.; Prieto, Gerardo and Sarmiento, Felix (2009) In Journal of Colloid and Interface Science 331(2). p.522-531
Abstract
Hexadecyltrimethylammonium bromide (C(16)TAB)-sodium perfluorooctanoate (C8FONa) and hexadecylpyridynium bromide (C16PyB)-(C8ONa catanionic semifluorinated mixtures have been studied by conductivity, dynamic light scattering (DLS), cryo-transmission electron microscopy (cryo-TEM) and polarizing microscopy. The regular Solution theory, applicable for a limited fluorinated molar ratio, does not predict long-range electrostatic interactions. The results are consistent with the fact that in the hydrogenated-rich region the interaction is attractive in both catanionic mixtures. The systems containing pyridinium headgroups were of the stronger interaction. A transition from micelles was found in both mixtures as a function of fluorinated molar... (More)
Hexadecyltrimethylammonium bromide (C(16)TAB)-sodium perfluorooctanoate (C8FONa) and hexadecylpyridynium bromide (C16PyB)-(C8ONa catanionic semifluorinated mixtures have been studied by conductivity, dynamic light scattering (DLS), cryo-transmission electron microscopy (cryo-TEM) and polarizing microscopy. The regular Solution theory, applicable for a limited fluorinated molar ratio, does not predict long-range electrostatic interactions. The results are consistent with the fact that in the hydrogenated-rich region the interaction is attractive in both catanionic mixtures. The systems containing pyridinium headgroups were of the stronger interaction. A transition from micelles was found in both mixtures as a function of fluorinated molar ratio. Special attention was devoted to the effect of the head group in the system properties. The information related with the mean vesicle radius measured by DLS was compared with the vesicle size distribution as well as the elastic properties of the bilayer measured with cryo-TEM. (C) 2008 Elsevier Inc. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Dynamic light scattering, Polarizing microscopy, Conductivity, Cryo-TEM, Spontaneous vesicles, Catanionic mixtures, Perfluorinated surfactants
in
Journal of Colloid and Interface Science
volume
331
issue
2
pages
522 - 531
publisher
Elsevier
external identifiers
  • wos:000263335700039
  • scopus:58249128001
ISSN
1095-7103
DOI
10.1016/j.jcis.2008.12.009
language
English
LU publication?
yes
id
21a6a5ca-1743-4103-9257-3fc5d5a98419 (old id 1374964)
date added to LUP
2009-05-08 15:57:33
date last changed
2017-01-01 04:32:37
@article{21a6a5ca-1743-4103-9257-3fc5d5a98419,
  abstract     = {Hexadecyltrimethylammonium bromide (C(16)TAB)-sodium perfluorooctanoate (C8FONa) and hexadecylpyridynium bromide (C16PyB)-(C8ONa catanionic semifluorinated mixtures have been studied by conductivity, dynamic light scattering (DLS), cryo-transmission electron microscopy (cryo-TEM) and polarizing microscopy. The regular Solution theory, applicable for a limited fluorinated molar ratio, does not predict long-range electrostatic interactions. The results are consistent with the fact that in the hydrogenated-rich region the interaction is attractive in both catanionic mixtures. The systems containing pyridinium headgroups were of the stronger interaction. A transition from micelles was found in both mixtures as a function of fluorinated molar ratio. Special attention was devoted to the effect of the head group in the system properties. The information related with the mean vesicle radius measured by DLS was compared with the vesicle size distribution as well as the elastic properties of the bilayer measured with cryo-TEM. (C) 2008 Elsevier Inc. All rights reserved.},
  author       = {Blanco, Elena and Olsson, Ulf and Ruso, Juan M. and Schulz, Pablo C. and Prieto, Gerardo and Sarmiento, Felix},
  issn         = {1095-7103},
  keyword      = {Dynamic light scattering,Polarizing microscopy,Conductivity,Cryo-TEM,Spontaneous vesicles,Catanionic mixtures,Perfluorinated surfactants},
  language     = {eng},
  number       = {2},
  pages        = {522--531},
  publisher    = {Elsevier},
  series       = {Journal of Colloid and Interface Science},
  title        = {Phase behavior of semifluorinated catanionic mixtures: Head group dependence and spontaneous formation of vesicles},
  url          = {http://dx.doi.org/10.1016/j.jcis.2008.12.009},
  volume       = {331},
  year         = {2009},
}