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Multilamellar Vesicle Formation Probed by Rheo-NMR and Rheo-SALS under Large Amplitude Oscillatory Shear

Kuczera, Stefan LU ; Gentile, Luigi LU ; Brox, Timothy I. ; Olsson, Ulf LU ; Schmidt, Claudia and Galvosas, Petrik (2018) In Langmuir 34(28). p.8314-8325
Abstract

The formation of multilamellar vesicles (MLVs) in the lyotropic lamellar phase of the system triethylene glycol mono n-decyl ether (C10E3)/water is investigated under large amplitude oscillatory shear (LAOS) using spatially resolved rheo-NMR spectroscopy and a combination of rheo-small angle light scattering (rheo-SALS) and conventional rheology. Recent advances in rheo-NMR hardware development facilitated the application of LAOS deformations in high-field NMR magnets. For the range of investigated strain amplitudes (10-50) and frequencies (1 and 2 rad s-1), MLV formation is observed in all NMR and most SALS experiments. It is found that the MLV size depends on the applied frequency in contrast to... (More)

The formation of multilamellar vesicles (MLVs) in the lyotropic lamellar phase of the system triethylene glycol mono n-decyl ether (C10E3)/water is investigated under large amplitude oscillatory shear (LAOS) using spatially resolved rheo-NMR spectroscopy and a combination of rheo-small angle light scattering (rheo-SALS) and conventional rheology. Recent advances in rheo-NMR hardware development facilitated the application of LAOS deformations in high-field NMR magnets. For the range of investigated strain amplitudes (10-50) and frequencies (1 and 2 rad s-1), MLV formation is observed in all NMR and most SALS experiments. It is found that the MLV size depends on the applied frequency in contrast to previous steady shear experiments where the shear rate is the controlling parameter. The onset of MLV formation, however, is found to vary with the shear amplitude. The LAOS measurements bear no indication of the intermediate structures resembling aligned multilamellar cylinders observed in steady shear experiments. Lissajous curves of stress vs strain reveal a transition from a viscoelastic solid material to a pseudoplastic material.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
34
issue
28
pages
12 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • pmid:29924625
  • scopus:85048978059
ISSN
0743-7463
DOI
10.1021/acs.langmuir.8b01510
language
English
LU publication?
yes
id
9b88d0a1-8dbb-4f4c-a7c7-2692d63e37d1
date added to LUP
2022-03-29 14:44:48
date last changed
2024-03-27 09:12:01
@article{9b88d0a1-8dbb-4f4c-a7c7-2692d63e37d1,
  abstract     = {{<p>The formation of multilamellar vesicles (MLVs) in the lyotropic lamellar phase of the system triethylene glycol mono n-decyl ether (C<sub>10</sub>E<sub>3</sub>)/water is investigated under large amplitude oscillatory shear (LAOS) using spatially resolved rheo-NMR spectroscopy and a combination of rheo-small angle light scattering (rheo-SALS) and conventional rheology. Recent advances in rheo-NMR hardware development facilitated the application of LAOS deformations in high-field NMR magnets. For the range of investigated strain amplitudes (10-50) and frequencies (1 and 2 rad s<sup>-1</sup>), MLV formation is observed in all NMR and most SALS experiments. It is found that the MLV size depends on the applied frequency in contrast to previous steady shear experiments where the shear rate is the controlling parameter. The onset of MLV formation, however, is found to vary with the shear amplitude. The LAOS measurements bear no indication of the intermediate structures resembling aligned multilamellar cylinders observed in steady shear experiments. Lissajous curves of stress vs strain reveal a transition from a viscoelastic solid material to a pseudoplastic material.</p>}},
  author       = {{Kuczera, Stefan and Gentile, Luigi and Brox, Timothy I. and Olsson, Ulf and Schmidt, Claudia and Galvosas, Petrik}},
  issn         = {{0743-7463}},
  language     = {{eng}},
  number       = {{28}},
  pages        = {{8314--8325}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Langmuir}},
  title        = {{Multilamellar Vesicle Formation Probed by Rheo-NMR and Rheo-SALS under Large Amplitude Oscillatory Shear}},
  url          = {{http://dx.doi.org/10.1021/acs.langmuir.8b01510}},
  doi          = {{10.1021/acs.langmuir.8b01510}},
  volume       = {{34}},
  year         = {{2018}},
}