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Dynamic Phase Diagram of a Nonionic Surfactant Lamellar Phase

Author:
  • Luigi Gentile
  • Manja Behrens
  • Sandor Balog
  • Kell Mortensen
  • Giuseppe A. Ranieri
  • Ulf Olsson
Publishing year: 2014
Language: English
Pages: 3622-3629
Publication/Series: The Journal of Physical Chemistry Part B
Volume: 118
Issue: 13
Document type: Journal article
Publisher: The American Chemical Society (ACS)

Abstract english

The dynamic phase diagram of triethylene glycol dodecyl ether (C12E3) in D2O was determined for 40, 50, and 60 wt % of surfactant. The shear flow effect on the nonionic lamellar phase was investigated as a function of temperature and concentration. The transition from planar lamellae (L-alpha)-to-multilamellar vesicles (MLVs) was characterized by means of rheology, rheo-small-angle neutron and light scattering. New insight into the nature of the transition region between L-alpha and the MLVs state is provided. A disorder-order transition was also observed by SANS. This is attributed to a transition from disordered MLVs to a close-packed array of MLV's with slightly higher order than before. Moreover flow instability was observed in the shear-thickening regime at 40 degrees C.

Keywords

  • Physical Chemistry

Other

Published
  • ISSN: 1520-5207
Luigi Gentile
E-mail: luigi [dot] gentile [at] fkem1 [dot] lu [dot] se

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MEMEG

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Physical Chemistry

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Microbial Ecology

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