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Superswollen Microemulsions Stabilized by Shear and Trapped by a Temperature Quench

Roger, Kevin; Olsson, Ulf LU ; Zackrisson Oskolkova, Malin LU ; Lindner, Peter and Cabane, Bernard (2011) In Langmuir 27(17). p.10447-10454
Abstract
We studied the solubilization of oil in the C16E8/hexadecane/H2O system. Close to the phase inversion temperature (PIT), the system, at equilibrium, can form either homogeneous states (i.e., microemulsions) at high surfactant concentrations or three-phase states at lower concentrations. We show that, under gentle shear, at a line we named the clearing boundary (CB), located a few degrees below the PIT, the system is homogeneous regardless of the surfactant concentration. We relate this shift of the microemulsion boundary to shear-induced disruption of the asymmetric bicontinuous structure. Although this state quickly relaxes to equilibrium when shear is stopped, we show that is still possible to trap it into a metastable state through a... (More)
We studied the solubilization of oil in the C16E8/hexadecane/H2O system. Close to the phase inversion temperature (PIT), the system, at equilibrium, can form either homogeneous states (i.e., microemulsions) at high surfactant concentrations or three-phase states at lower concentrations. We show that, under gentle shear, at a line we named the clearing boundary (CB), located a few degrees below the PIT, the system is homogeneous regardless of the surfactant concentration. We relate this shift of the microemulsion boundary to shear-induced disruption of the asymmetric bicontinuous structure. Although this state quickly relaxes to equilibrium when shear is stopped, we show that is still possible to trap it into a metastable state through a temperature quench. This method is the sub-PIT emulsification that we described in a previous work (Roger et al. Langmuir 2010, 26, 3860-3867). (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
27
issue
17
pages
10447 - 10454
publisher
The American Chemical Society
external identifiers
  • wos:000294373300018
  • scopus:80052232621
ISSN
0743-7463
DOI
10.1021/la201685x
language
English
LU publication?
yes
id
89a666d4-40bd-4cda-a705-5c9f8a34ed3c (old id 2159241)
date added to LUP
2011-09-22 15:53:08
date last changed
2017-09-03 03:19:14
@article{89a666d4-40bd-4cda-a705-5c9f8a34ed3c,
  abstract     = {We studied the solubilization of oil in the C16E8/hexadecane/H2O system. Close to the phase inversion temperature (PIT), the system, at equilibrium, can form either homogeneous states (i.e., microemulsions) at high surfactant concentrations or three-phase states at lower concentrations. We show that, under gentle shear, at a line we named the clearing boundary (CB), located a few degrees below the PIT, the system is homogeneous regardless of the surfactant concentration. We relate this shift of the microemulsion boundary to shear-induced disruption of the asymmetric bicontinuous structure. Although this state quickly relaxes to equilibrium when shear is stopped, we show that is still possible to trap it into a metastable state through a temperature quench. This method is the sub-PIT emulsification that we described in a previous work (Roger et al. Langmuir 2010, 26, 3860-3867).},
  author       = {Roger, Kevin and Olsson, Ulf and Zackrisson Oskolkova, Malin and Lindner, Peter and Cabane, Bernard},
  issn         = {0743-7463},
  language     = {eng},
  number       = {17},
  pages        = {10447--10454},
  publisher    = {The American Chemical Society},
  series       = {Langmuir},
  title        = {Superswollen Microemulsions Stabilized by Shear and Trapped by a Temperature Quench},
  url          = {http://dx.doi.org/10.1021/la201685x},
  volume       = {27},
  year         = {2011},
}