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Shear-Induced Transitions between a Planar Lamellar Phase and Multilamellar Vesicles: Continuous versus Discontinuous Transformation.

Medronho, Bruno LU ; Shafaei, S; Szopko, R; Miguel, M; Olsson, Ulf LU and Schmidt, C (2008) In Langmuir 24(13). p.6480-6486
Abstract
The shear-induced transitions between an oriented lamellar phase and shear-induced multilamellar vesicles (MLVs) in a nonionic surfactant system were studied by deuterium rheo-NMR spectroscopy as a function of time in start-up experiments at several temperatures and shear rates. By starting from an initial state of oriented lamellae and observing the transformation to the final steady state of MLVs and vice-versa, two different mechanisms were found, depending on the direction of the transition and the initial state. The transition is continuous when MLVs are formed, starting from the oriented lamellar phase. On the other hand, a discontinuous nucleation-and-growth process with a coexistence region is observed when transforming MLVs into... (More)
The shear-induced transitions between an oriented lamellar phase and shear-induced multilamellar vesicles (MLVs) in a nonionic surfactant system were studied by deuterium rheo-NMR spectroscopy as a function of time in start-up experiments at several temperatures and shear rates. By starting from an initial state of oriented lamellae and observing the transformation to the final steady state of MLVs and vice-versa, two different mechanisms were found, depending on the direction of the transition and the initial state. The transition is continuous when MLVs are formed, starting from the oriented lamellar phase. On the other hand, a discontinuous nucleation-and-growth process with a coexistence region is observed when transforming MLVs into an oriented lamellar phase. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
24
issue
13
pages
6480 - 6486
publisher
The American Chemical Society
external identifiers
  • wos:000257101100016
  • pmid:18517228
  • scopus:47349127845
ISSN
0743-7463
DOI
10.1021/la800326a
language
English
LU publication?
yes
id
6842342b-36d3-447c-a98e-fef88603363e (old id 1169341)
date added to LUP
2009-03-09 11:38:21
date last changed
2017-09-24 03:33:31
@article{6842342b-36d3-447c-a98e-fef88603363e,
  abstract     = {The shear-induced transitions between an oriented lamellar phase and shear-induced multilamellar vesicles (MLVs) in a nonionic surfactant system were studied by deuterium rheo-NMR spectroscopy as a function of time in start-up experiments at several temperatures and shear rates. By starting from an initial state of oriented lamellae and observing the transformation to the final steady state of MLVs and vice-versa, two different mechanisms were found, depending on the direction of the transition and the initial state. The transition is continuous when MLVs are formed, starting from the oriented lamellar phase. On the other hand, a discontinuous nucleation-and-growth process with a coexistence region is observed when transforming MLVs into an oriented lamellar phase.},
  author       = {Medronho, Bruno and Shafaei, S and Szopko, R and Miguel, M and Olsson, Ulf and Schmidt, C},
  issn         = {0743-7463},
  language     = {eng},
  number       = {13},
  pages        = {6480--6486},
  publisher    = {The American Chemical Society},
  series       = {Langmuir},
  title        = {Shear-Induced Transitions between a Planar Lamellar Phase and Multilamellar Vesicles: Continuous versus Discontinuous Transformation.},
  url          = {http://dx.doi.org/10.1021/la800326a},
  volume       = {24},
  year         = {2008},
}