Volume 53, Number 3, February 2001
|Page(s)||335 - 341|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 December 2003|
Cylindrical intermediates in a shear-induced lamellar-to-vesicle transition
Universität Kiel, Physikalische Chemie - Olshausenstr. 40, D-24098 Kiel,
2 Institut Laue-Langevin - B.P. 156, F-38042 Grenoble, France
3 Physical Chemistry, Lund University - P.O. 124, S-221 00 Lund, Sweden
Corresponding author: email@example.com
Accepted: 20 November 2000
The mechanism and kinetics of a shear-induced formation of multi-lamellar vesicles in a lyotropic lamellar phase of (Triethyleneglycol-decylether) was investigated by rheology and time-resolved small-angle neutron and light scattering (SANS, SALS). Starting from a well-defined, macroscopically oriented lamellar phase, the transition occurs in two steps. First, there is a formation of an intermediate structure oriented in the flow direction which scatters only perpendicular to the flow. This is compatible with long, multi-lamellar cylinders (tubuli). Comparing results from three different shear rates shows that the formation of this intermediate structure is strain controlled. As shear is continued, multilamellar vesicles are formed.
PACS: 61.30.Eb – Experimental determinations of smectic, nematic, cholesteric, and other structures / 83.20.Hn – Structural and phase changes / 83.50.-v – Deformation; material flow
© EDP Sciences, 2001
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