Dynamic Phase Diagram of a Nonionic Surfactant Lamellar Phase

Luigi Gentile, Manja Behrens, Sandor Balog, Kell Mortensen, Giuseppe A. Ranieri, Ulf Olsson

Research output: Contribution to journalArticlepeer-review


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.
Original languageEnglish
Pages (from-to)3622-3629
JournalThe Journal of Physical Chemistry Part B
Issue number13
Publication statusPublished - 2014

Subject classification (UKÄ)

  • Physical Chemistry


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