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Reversible size of shear-induced multi-lamellar vesicles

Medronho, B; Fujii, S; Richtering, W; Miguel, Maria LU and Olsson, Ulf LU (2005) In Colloid and Polymer Science 284(3). p.317-321
Abstract
We have investigated the reversibility in the shear-induced multi-lamellar vesicle (MLV) size during stepwise cycling of the shear rate by employing common rheometry, polarized light microscopy and rheo-optic techniques. We thus address the question whether there is a true MLV steady state, irrespective of history. The system studied, was the nonionic surfactant triethylene glycol decyl ether (C10E3) with a concentration of 40 wt.% in (DO)-O-2 and a constant temperature of 25 degrees C. It was found that the MLV size varies reversibly with varying shear rate, and hence there exists a true steady state in the presence of shear flow. The experimental observations of reversibility are however restricted to higher shear rates. Because the... (More)
We have investigated the reversibility in the shear-induced multi-lamellar vesicle (MLV) size during stepwise cycling of the shear rate by employing common rheometry, polarized light microscopy and rheo-optic techniques. We thus address the question whether there is a true MLV steady state, irrespective of history. The system studied, was the nonionic surfactant triethylene glycol decyl ether (C10E3) with a concentration of 40 wt.% in (DO)-O-2 and a constant temperature of 25 degrees C. It was found that the MLV size varies reversibly with varying shear rate, and hence there exists a true steady state in the presence of shear flow. The experimental observations of reversibility are however restricted to higher shear rates. Because the transformation of the size results from the shear strain, the process is very slow at lower shear rates, where the steady state cannot be reached within a reasonable experimental time. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Colloid and Polymer Science
volume
284
issue
3
pages
317 - 321
publisher
Springer
external identifiers
  • wos:000234212500011
  • scopus:28944443127
ISSN
0303-402X
DOI
10.1007/s00396-005-1367-5
language
English
LU publication?
yes
id
2d6d287f-37d7-45b3-8a17-33aaf1a4b8bc (old id 157493)
date added to LUP
2007-07-11 16:30:49
date last changed
2017-08-27 03:55:23
@article{2d6d287f-37d7-45b3-8a17-33aaf1a4b8bc,
  abstract     = {We have investigated the reversibility in the shear-induced multi-lamellar vesicle (MLV) size during stepwise cycling of the shear rate by employing common rheometry, polarized light microscopy and rheo-optic techniques. We thus address the question whether there is a true MLV steady state, irrespective of history. The system studied, was the nonionic surfactant triethylene glycol decyl ether (C10E3) with a concentration of 40 wt.% in (DO)-O-2 and a constant temperature of 25 degrees C. It was found that the MLV size varies reversibly with varying shear rate, and hence there exists a true steady state in the presence of shear flow. The experimental observations of reversibility are however restricted to higher shear rates. Because the transformation of the size results from the shear strain, the process is very slow at lower shear rates, where the steady state cannot be reached within a reasonable experimental time.},
  author       = {Medronho, B and Fujii, S and Richtering, W and Miguel, Maria and Olsson, Ulf},
  issn         = {0303-402X},
  language     = {eng},
  number       = {3},
  pages        = {317--321},
  publisher    = {Springer},
  series       = {Colloid and Polymer Science},
  title        = {Reversible size of shear-induced multi-lamellar vesicles},
  url          = {http://dx.doi.org/10.1007/s00396-005-1367-5},
  volume       = {284},
  year         = {2005},
}