Advanced

Effect of flow reversal on the shear induced formation of multilamellar vesicles

Nettesheim, F; Olsson, Ulf LU ; Lindner, P and Richtering, W (2004) In The Journal of Physical Chemistry Part B 108(20). p.6328-6335
Abstract
The influence of rate controlled flow reversal on the transition from planar lamellae to multilamellar vesicles (MLV) using a nonionic lamellar phase consisting of 40 wt % triethylene glycol monodecyl ether (C10E3 in D2O) is investigated by means of time-resolved rheo-small-angle light and neutron scattering (SALS, SANS). Flow reversal provides the possibility to control the kinetics of the transition substantially, and states occurring very early during the transition can be studied. A slowing down of the transition on an absolute strain axis is observed as the strain amplitude of the flow reversal is decreased. This retardation is attributed to the partial recovery of an earlier state as shear is inverted. This can nicely be demonstrated... (More)
The influence of rate controlled flow reversal on the transition from planar lamellae to multilamellar vesicles (MLV) using a nonionic lamellar phase consisting of 40 wt % triethylene glycol monodecyl ether (C10E3 in D2O) is investigated by means of time-resolved rheo-small-angle light and neutron scattering (SALS, SANS). Flow reversal provides the possibility to control the kinetics of the transition substantially, and states occurring very early during the transition can be studied. A slowing down of the transition on an absolute strain axis is observed as the strain amplitude of the flow reversal is decreased. This retardation is attributed to the partial recovery of an earlier state as shear is inverted. This can nicely be demonstrated by the width of the azimuthal intensity distribution, which shows oscillations upon flow reversal. >From the slowing down of the process a loss term is defined, which provides insight in the very early stages of the experiment, namely the minimum strain that is needed to induce irreversible structural changes in the sample. This quantity is for the present sample found to be 6.5 strain units. Furthermore, the exponential scaling of the strain needed to reach characteristic states of the transition with strain amplitude seems to hold for all length scales involved in the process. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
The Journal of Physical Chemistry Part B
volume
108
issue
20
pages
6328 - 6335
publisher
The American Chemical Society
external identifiers
  • wos:000221455000030
  • pmid:18950119
  • scopus:2642587487
ISSN
1520-5207
DOI
10.1021/jp037189w
language
English
LU publication?
yes
id
bdc885c4-5251-432a-af92-e662e61a3541 (old id 153925)
date added to LUP
2007-07-12 08:22:13
date last changed
2017-01-01 06:38:31
@article{bdc885c4-5251-432a-af92-e662e61a3541,
  abstract     = {The influence of rate controlled flow reversal on the transition from planar lamellae to multilamellar vesicles (MLV) using a nonionic lamellar phase consisting of 40 wt % triethylene glycol monodecyl ether (C10E3 in D2O) is investigated by means of time-resolved rheo-small-angle light and neutron scattering (SALS, SANS). Flow reversal provides the possibility to control the kinetics of the transition substantially, and states occurring very early during the transition can be studied. A slowing down of the transition on an absolute strain axis is observed as the strain amplitude of the flow reversal is decreased. This retardation is attributed to the partial recovery of an earlier state as shear is inverted. This can nicely be demonstrated by the width of the azimuthal intensity distribution, which shows oscillations upon flow reversal. >From the slowing down of the process a loss term is defined, which provides insight in the very early stages of the experiment, namely the minimum strain that is needed to induce irreversible structural changes in the sample. This quantity is for the present sample found to be 6.5 strain units. Furthermore, the exponential scaling of the strain needed to reach characteristic states of the transition with strain amplitude seems to hold for all length scales involved in the process.},
  author       = {Nettesheim, F and Olsson, Ulf and Lindner, P and Richtering, W},
  issn         = {1520-5207},
  language     = {eng},
  number       = {20},
  pages        = {6328--6335},
  publisher    = {The American Chemical Society},
  series       = {The Journal of Physical Chemistry Part B},
  title        = {Effect of flow reversal on the shear induced formation of multilamellar vesicles},
  url          = {http://dx.doi.org/10.1021/jp037189w},
  volume       = {108},
  year         = {2004},
}