Investigation of Phase States, Thermo-Morphologic, Magneto-Morphologic and Refractive Properties of Mesophases in Dodecyltrimethyl Ammonium Bromide - Water Lyotropic Liquid Crystalline System

Abstract

We report the phase states in dodecyltrimethyl ammonium bromide/water (DDTMABr-H2O) lyotropic liquid crystalline system. The temperature-concentration phase diagram of this system has been determined. Isotropic micellar L-1 phase, nematic-calamitic N-c and hexagonal E mesophases have been observed in DDTMABr/H2O system. Dynamics of transformations of magnetically induced textures in N-c and E mesophases has been investigated. Temperature and concentration dependences of the refractive index in the L-1 phase, N-c and E mesophases have been determined. The appearance of the magnetically induced aligned textures of N-c mesophase and changes of the optical birefringence vs. time have been investigated.