Issue |
Europhys. Lett.
Volume 53, Number 3, February 2001
|
|
---|---|---|
Page(s) | 335 - 341 | |
Section | Condensed matter: structure, mechanical and thermal properties | |
DOI | https://doi.org/10.1209/epl/i2001-00158-3 | |
Published online | 01 December 2003 |
Cylindrical intermediates in a shear-induced lamellar-to-vesicle transition
1
Universität Kiel, Physikalische Chemie - Olshausenstr. 40, D-24098 Kiel,
Germany
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: richtering@phc.uni-kiel.de
Received:
2
May
2000
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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