title: Dynamic phase diagram of a nonionic surfactant lamellar phase.
abstract: 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 (Lα)-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 Lα 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 °C.
authors.affiliation: Dipartimento di Chimica e Tecnologie Chimiche, University of Calabria , P. Bucci 14C, 87036 Rende, Italy.
authors.forename: Luigi
authors.initials: L
authors.lastname: Gentile
authors.forename: Manja A
authors.initials: MA
authors.lastname: Behrens
authors.forename: Sandor
authors.initials: S
authors.lastname: Balog
authors.forename: Kell
authors.initials: K
authors.lastname: Mortensen
authors.forename: Giuseppe A
authors.initials: GA
authors.lastname: Ranieri
authors.forename: Ulf
authors.initials: U
authors.lastname: Olsson