Polymerization In Nonaqueous Lyotropic Liquid Crystals With A Polymerizable Solvent

Lamellar liquid crystals of lecithin and 2-hydroxyethyl methacrylate (HEMA) were polymerized by using UV radiation. Optical microscopy, infrared spectroscopy, and small-angle X-ray diffraction were used to compare the structure prior to and after polymerization. The lamellar structure was retained after polymerization with increased interlayer spacing. © 1987, American Chemical Society. All rights reserved

The Influence Of Solvent On Nonaqueous Lyotropic Liquid Crystalline Phase Formed By Triethanolammonium Oleate

The geometry of a lyotropic lamellar liquid crystalline phase formed by triethanolamine (TEA) and oleic acid (OLA) with solubilized igomers of polyethylene glycols and different types of oils was termined from small angle X‐ray diffraction patterns. The region of ability of the lamellar liquid crystalline phase on addition of soluble ycols or oils was found to depend on the molar ratio of triethanolamine to oleic acid. A series of ethylene glycol oligomers, which were solubized in the polar part of the structure, showed maximum solubilization at the OLA–TEA mole ratio of 1.6. The organic oils, on the other hand, which are solubilized into the hydrophobic part of the structure, exhibited maximum solubilization at the OLA‐TEA mole ratio of 0.8. Copyright © 1985 Wiley‐Liss, Inc., A Wiley Compan

Solubilization In Lyotropic Liquid Crystals

Solubilization in non-aqeuous lyotropic liquid crystals was investigated by determination of the stability region of a lamellar liquid crystal in systems of triethanolamine (TEA), dodecylbenzenesulfonic acid (DBSA) and a series of solvents. The solubilization maximum was moved towards higher DBSA/TEA ratios for polar solvents and the reverse for non-polar ones. The solvents caused the maximum increase of interlayer spacing when added. © 1987, Taylor & Francis Group, LLC. All rights reserved