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N. V. Sautina, Yu. G. Galyametdinov

Author affiliations
Kazan National Research Technological University,
68 Karl Marx St., Kazan, 420015, Russia. 
E-mail: n.sautina@mail.ru

Abstract
Nontoxic biocompatible self-organizing systems, such as the lyotropic liquid crystals and microemulsions, based on lecithin, propylene glycol, vaseline oil and water with various mass ratios of surfactant:alcohol have been obtained. The pseudoternary phase diagrams were constructed; concentration limits of the existing phases were identified. The influence of ratio lecithin:propylene glycol on the formation of the lyotropic liquid crystals phases and temperatures of phase transitions were demonstrated. The dependence of the average droplet size of the microemulsion on addition of propylene glycol was study. It is shown that the addition of alcohol increases microemulsion region and decreases the region of liquid crystal phase.

Keywords: lyotropic liquid crystals, microemulsions, lecithin, pseudoternary phase diagram, phase transition