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Molecular Crystals and Liquid Crystals Volume 500, 2009 - Issue 1: Proceedings of the 8th National Meeting of the Italian Liquid Crystal Society (SICL)
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Original Articles

Metastability of Multi-Lamellar Vesicles in a Nonionic System

Luigi Filippelli Department of Chemistry, University of Calabria, Via P. Bucci, Cubo, Arcavacata, Italy
,
Bruno Medronho Department of Chemistry, University of Coimbra, Coimbra, Portugal; Physical Chemistry 1, Center of Chemistry and Chemical Engineering, Lund University, Lund, Sweden
,
Cesare Oliviero Rossi Department of Chemistry, University of Calabria, Via P. Bucci, Cubo, Arcavacata, ItalyCorrespondence[email protected]
,
Maria G. Miguel Department of Chemistry, University of Coimbra, Coimbra, Portugal
&
Ulf Olsson Physical Chemistry 1, Center of Chemistry and Chemical Engineering, Lund University, Lund, Sweden
Pages 166-181 | Published online: 18 Mar 2009
 
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Abstract

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.

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