Planar lamellae and onions: a spatially resolved rheo–NMR approach to the shear-induced structural transformations in a surfactant model system | Zendy

Bruno Medronho | Zendy; Jennifer Brown | Zendy; Maria G. Miguel | Zendy; Claudia Schmidt | Zendy; Ulf Olsson | Zendy; Petrik Galvosas | Zendy

Open Access

Planar lamellae and onions: a spatially resolved rheo–NMR approach to the shear-induced structural transformations in a surfactant model system

Author(s) -

Bruno Medronho,

Jennifer Brown,

Maria G. Miguel,

Claudia Schmidt,

Ulf Olsson,

Petrik Galvosas

Publication year - 2011

Publication title -

soft matter

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.99

H-Index - 170

eISSN - 1744-6848

pISSN - 1744-683X

DOI - 10.1039/c0sm01323d

Subject(s) - lamellar structure , lyotropic , planar , pulmonary surfactant , shear (geology) , nuclear magnetic resonance spectroscopy , materials science , vesicle , homogeneous , chemical physics , crystallography , chemistry , nuclear magnetic resonance , membrane , composite material , thermodynamics , stereochemistry , polymer , physics , liquid crystalline , biochemistry , computer graphics (images) , computer science

The shear-induced transformations between oriented planar lamellae and a state of closely packed multilamellar vesicles (MLVs) in a lyotropic nonionic surfactant model system were studied by the combination of nuclear magnetic resonance (NMR) spectroscopy and diffusometry with magnetic resonance imaging (MRI). (2)H NMR imaging confirmed the discontinuous nature of the transition from onions to planar lamellae, revealing the spatial coexistence of both states within the gap of the cylindrical Couette geometry. On the other hand, NMR diffusion measurements in three principal directions and at various values of strain strongly suggest that a multi-lamellar cylindrical or undulated intermediate structure exists during the continuous and spatially homogeneous transition from planar lamellae to MLVs

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research