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Rheochaos and flow instability phenomena in a nonionic lamellar phase

Gentile, Luigi ; Silva, Bruno LU ; Lages, Sebastian LU ; Mortensen, Kell ; Kohlbrecher, Joachim and Olsson, Ulf LU (2013) In Soft Matter 9(4). p.1133-1140
Abstract
In this study we report on instability phenomena in a solution where shear induces multilamellar vesicles (MLVs) from a lamellar phase. A shear-thickening regime has been observed for hexadecyl tetraethylene glycol ether (C16E4) dissolved in D2O at 40 degrees C. In this regime, unstable temporal viscosity behavior, i.e. periodic oscillations, has been observed at 2, 5 and 10 s(-1). Moreover at a shear rate of 10 s(-1) shear banding manifests itself as the occurrence of transparent and turbid bands stacked along the vorticity direction. We perform time-resolved-rheo-small angle neutron scattering (rheo-SANS) experiments to understand the nature of the viscosity oscillations and spatial-resolved experiments to obtain a structural... (More)
In this study we report on instability phenomena in a solution where shear induces multilamellar vesicles (MLVs) from a lamellar phase. A shear-thickening regime has been observed for hexadecyl tetraethylene glycol ether (C16E4) dissolved in D2O at 40 degrees C. In this regime, unstable temporal viscosity behavior, i.e. periodic oscillations, has been observed at 2, 5 and 10 s(-1). Moreover at a shear rate of 10 s(-1) shear banding manifests itself as the occurrence of transparent and turbid bands stacked along the vorticity direction. We perform time-resolved-rheo-small angle neutron scattering (rheo-SANS) experiments to understand the nature of the viscosity oscillations and spatial-resolved experiments to obtain a structural characterization of vorticity bands. (Less)
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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Soft Matter
volume
9
issue
4
pages
1133 - 1140
publisher
Royal Society of Chemistry
external identifiers
  • wos:000312553900015
  • scopus:84871771853
ISSN
1744-6848
DOI
10.1039/c2sm27101j
language
English
LU publication?
yes
id
23cf189c-3915-457b-af94-fc318d8d48c9 (old id 3400798)
date added to LUP
2016-04-01 14:49:12
date last changed
2025-04-04 15:13:01
@article{23cf189c-3915-457b-af94-fc318d8d48c9,
  abstract     = {{In this study we report on instability phenomena in a solution where shear induces multilamellar vesicles (MLVs) from a lamellar phase. A shear-thickening regime has been observed for hexadecyl tetraethylene glycol ether (C16E4) dissolved in D2O at 40 degrees C. In this regime, unstable temporal viscosity behavior, i.e. periodic oscillations, has been observed at 2, 5 and 10 s(-1). Moreover at a shear rate of 10 s(-1) shear banding manifests itself as the occurrence of transparent and turbid bands stacked along the vorticity direction. We perform time-resolved-rheo-small angle neutron scattering (rheo-SANS) experiments to understand the nature of the viscosity oscillations and spatial-resolved experiments to obtain a structural characterization of vorticity bands.}},
  author       = {{Gentile, Luigi and Silva, Bruno and Lages, Sebastian and Mortensen, Kell and Kohlbrecher, Joachim and Olsson, Ulf}},
  issn         = {{1744-6848}},
  language     = {{eng}},
  number       = {{4}},
  pages        = {{1133--1140}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Soft Matter}},
  title        = {{Rheochaos and flow instability phenomena in a nonionic lamellar phase}},
  url          = {{http://dx.doi.org/10.1039/c2sm27101j}},
  doi          = {{10.1039/c2sm27101j}},
  volume       = {{9}},
  year         = {{2013}},
}