Startseite Amphiphile/Water/Decanol Lyotropic Liquid Crystalline System: Study of Thermal States of Anisometric Micelles in Nematic-Calamitic and Nematic-Discotic Mesophases
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Amphiphile/Water/Decanol Lyotropic Liquid Crystalline System: Study of Thermal States of Anisometric Micelles in Nematic-Calamitic and Nematic-Discotic Mesophases

  • Arif Nesrullajev
Veröffentlicht/Copyright: 9. Mai 2016
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Abstract

Structural peculiarities of the rod-like micelles in the nematic-calamitic (NC) and disc-like micelles in the nematic-discotic (ND) lyotropic mesophases have been investigated. Hexadecyltrimethyl ammonium bromide/water/1-decanol ternary lyotropic system was used. Temperature changes of the shapes and anisometricity of the rod-like and disc-like micelles have been estimated. The method of the electrical conductivity anisotropy in the orientational shear flow has been used for these estimations. Sign of the diamagnetic anisotropy of the NC and ND mesophases has been also determined. The rod-like micelles of the NC mesophase were considered as the prolate ellipsoids and the disc-like micelles of the ND mesophase were considered as the oblate ellipsoids.

Kurzfassung

Es wurden die strukturellen Besonderheiten der stäbchenförmigen Mizellen in der nematisch-calamatischen Flüssigkristallphase (NC) und die der scheibenförmigen Mizellen in der nematisch-discotischen Flüssigkristallphase (ND) untersucht. Das ternäre flüssigkristalline System Hexadecyltrimethylammoniumbromid/Wasser/1-Decanol wurde eingesetzt. Die temperaturabhängigen Veränderungen der Gestalt und der Anisotropie der Stäbchen- und der Scheibenmizellen wurden bestimmt. Für diese Bestimmungen wurde die Methode der „electrical conductivity anisotropy“ in der gerichteten Scherströmung verwendet. Das Vorzeichen der diamagnetischen Anisotropie der NC und ND-Mesophasen wurde ebenfalls ermittelt. Die Stäbchenmizellen der NC-Mesophase wurden als gestreckte Ellipsoide und die Kugelmizellen als abgeplattete Ellipsoide betrachtet.


*Correspondence address Prof. Arif Nesrullajev, Muğla Sitki Koçman University, Faculty of Natural Sciences, Department of Physics, 48000 Kotekli Mugla, Turkey. E-Mail:

DSc PhD Arif Nesrullajev is full Professor at Mugla Sitki Kocman University and is currently Head of Department of Physics. He is author and co-author of more than 240 scientific works in fields of Soft Matter Physics, Physics and Application of Liquid Crystals. He obtained “Inventor of USSR” medal and various scientific award. He worked as a Visiting Professor in Italy, Germany, Russia, Lithuania and Turkey.


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Received: 2015-11-27
Accepted: 2016-01-15
Published Online: 2016-05-09
Published in Print: 2016-05-17

© 2016, Carl Hanser Publisher, Munich

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