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Deuterium NMR study of slow relaxation dynamics in a polymerlike micelles system after flow-induced orientation

Angelico, R; Burgemeister, D; Ceglie, A; Olsson, Ulf LU ; Palazzo, G and Schmidt, C (2003) In The Journal of Physical Chemistry Part B 107(38). p.10325-10328
Abstract
We present a first time-resolved deuterium NMR study on wormlike

micelles under shear. For the investigation, a micellar system made of

soybean phosphatidylcholine (lecithin), D2O, and cyclohexane was

studied in the concentrated regime, in the vicinity of the

isotropic/nematic transition but positioned in the equilibrium

isotropic phase. The D2O dispersed in the micellar core was used as a

probe to study the relaxation of a shearing-induced nematic phase back

to the isotropic liquid state, after cessation of shear. The whole

process was followed through time-resolved deuterium spectra and was

characterized by a continuous decrease of the measured... (More)
We present a first time-resolved deuterium NMR study on wormlike

micelles under shear. For the investigation, a micellar system made of

soybean phosphatidylcholine (lecithin), D2O, and cyclohexane was

studied in the concentrated regime, in the vicinity of the

isotropic/nematic transition but positioned in the equilibrium

isotropic phase. The D2O dispersed in the micellar core was used as a

probe to study the relaxation of a shearing-induced nematic phase back

to the isotropic liquid state, after cessation of shear. The whole

process was followed through time-resolved deuterium spectra and was

characterized by a continuous decrease of the measured quadrupolar

splitting, proportional to the nematic order parameter. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
The Journal of Physical Chemistry Part B
volume
107
issue
38
pages
10325 - 10328
publisher
The American Chemical Society
external identifiers
  • wos:000185401900002
  • scopus:0141890874
ISSN
1520-5207
DOI
language
English
LU publication?
yes
id
2cb5d1fd-a9b2-4971-a2e2-242f5f3c8278 (old id 121912)
date added to LUP
2007-07-10 16:20:23
date last changed
2018-05-29 12:25:48
@article{2cb5d1fd-a9b2-4971-a2e2-242f5f3c8278,
  abstract     = {We present a first time-resolved deuterium NMR study on wormlike<br/><br>
	micelles under shear. For the investigation, a micellar system made of<br/><br>
	soybean phosphatidylcholine (lecithin), D2O, and cyclohexane was<br/><br>
	studied in the concentrated regime, in the vicinity of the<br/><br>
	isotropic/nematic transition but positioned in the equilibrium<br/><br>
	isotropic phase. The D2O dispersed in the micellar core was used as a<br/><br>
	probe to study the relaxation of a shearing-induced nematic phase back<br/><br>
	to the isotropic liquid state, after cessation of shear. The whole<br/><br>
	process was followed through time-resolved deuterium spectra and was<br/><br>
	characterized by a continuous decrease of the measured quadrupolar<br/><br>
	splitting, proportional to the nematic order parameter.},
  author       = {Angelico, R and Burgemeister, D and Ceglie, A and Olsson, Ulf and Palazzo, G and Schmidt, C},
  issn         = {1520-5207},
  language     = {eng},
  number       = {38},
  pages        = {10325--10328},
  publisher    = {The American Chemical Society},
  series       = {The Journal of Physical Chemistry Part B},
  title        = {Deuterium NMR study of slow relaxation dynamics in a polymerlike micelles system after flow-induced orientation},
  url          = {http://dx.doi.org/},
  volume       = {107},
  year         = {2003},
}