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Liquid Crystals and their Application
Russian Journal

Zhidkie kristally i ikh prakticheskoe ispol'zovanie

Жидкие кристаллы и их практическое использование

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Zhidk. krist. ikh prakt. ispol'z. = Liq. Cryst. and their Appl., 2011, 1, 71—79.





Thermodynamics of Lyotropic Mesomorphism in Aqueous Solutions of Aprotic Solvents and Koga's Mixing Schemes



L. V. El'nikova1,2

Author affiliations
1SSC RF A.I. Alikhanovs Institute for Theoretical and Experimental Physics,
Russia, 117218 Moscow, B. Cheremushkinskaya, 25
E-mail: elnikova@itep.ru
2 Research Institute for Solid State Physics and Optics,
Budapest 1525, POB 49, Hungary

Abstract
Lyotropic phases of acetone and tetramethylurea specified by Koga (Chen D. H. C., Chu P. M., Tanaka S. H., To E. C. H., Koga Y., Fluid Phase Equilibria, 175, (2000), 35) in accordance to three mixing schemes caused by hydrogen bonding nature are analyzed. In this paper, numerical Monte Carlo lattice modeling for these solutions was carried out in frames of the Ising model in order to confirm the Koga’s hypothesis and to analyze possibilities to spread out this method to another aprotic solvents, and their clusterization as well. Obtained numerical results are in satisfactory compliance with the structure relaxation, small-angle neutron scattering and positron annihilation spectroscopy data.

Keywords: mixing schemes, aprotic solvents, lattice Monte Carlo method





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