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Ulf Olsson. Portrait.

Ulf Olsson

Professor

Ulf Olsson. Portrait.

Metastability of Multi-Lamellar Vesicles in a Nonionic System

Author

  • Luigi Filippelli
  • Bruno Medronho
  • Cesare Oliviero Rossi
  • Maria G. Miguel
  • Ulf Olsson

Summary, in English

Nuclear magnetic resonance spectroscopy and rheological analysis have been used to investigate the stability of mechanically induced tri-ethylene-glycol-mono-n-decyl-ether (C10E3)/deuterium oxide (D2O) multi-lamellar vesicles (MLVs) and the transition from MLVs to planar lamellae. It was found that MLVs prepared by vortex stirring, relax back to the lamellar phase in a few hours while the relaxation of the shear induced MLVs takes days. Pulsed gradient spin echo and water self-diffusion coefficient experiments, revealed that the MLVs texture, obtained by vortex stirring, is composed of large size structures. These data indicate that the kinetics of lamellar re-formation depend on the MLVs number density.

Department/s

  • Physical Chemistry

Publishing year

2009

Language

English

Pages

166-181

Publication/Series

Molecular Crystals and Liquid Crystals

Volume

500

Document type

Paper in conference proceeding

Publisher

Taylor & Francis

Topic

  • Physical Chemistry (including Surface- and Colloid Chemistry)

Keywords

  • rheo-NMR
  • MLVs
  • C10E3
  • relaxation time
  • lamellar phase

Conference name

8th National Meeting of the Italian-Liquid-Crystal-Society

Conference date

2008-06-04 - 2008-06-07

Conference place

,

Status

Published

Report number

500

ISBN/ISSN/Other

  • ISSN: 1542-1406
  • ISSN: 1543-5318