J. Phys. Colloques
Volume 51, Numéro C7, Décembre 1990International Workshop on Geometry and Interfaces
|Page(s)||C7-375 - C7-381|
J. Phys. Colloques 51 (1990) C7-375-C7-381
STRUCTURAL FEATURES OF THE CUBIC PHASE OF A TERNARY SURFACTANT SYSTEMS. RADIMAN1, C. TOPRAKCIOGLU1, 2, L. DAI1, A.R. FARUQI3, R.P. HJELM Jr.4 and A. de VALLERA5
1 Cavendish Laboratory, Madingley Road, GB-Cambridge CB3 OHE, Great-Britain
2 AFRC Institute of Food Research, Colney Lane, GB-Norwich NR4 7UA, Great-Britain
3 MRC Laboratory of Molecular Biology, Hills Road, GB-Cambridge CB2 2QH, Great-Britain
4 LANSCE, Los Alamos National Laboratory, Los Alamos NM 87545, U.S.A.
5 Department of Physics, University of Lisbon, P-1700 Lisbon, Portugal
We have studied the cubic phase formed by the ternary system water/didodecyldimethylammonium bromide/octane using small-angle x-ray and neutron scattering. We have observed the existence of more than one symmetry in this cubic region, with a transition from primitive to body centred cubic symmetry on increasing the water content of the system. Our results are consistent with a bicontinuous periodic structure of constant mean curvature. We also report rheological measurements which indicate that the ringing behaviour of the cubic samples is associated with a sharp increase in the quality factor as audible frequencies are approached.
© EDP Sciences 1990