Studies of Lyotropic Liquid Crystalline Phase in Sodium Dodecylsulfate - Water System by Density and Conductivity Measurements

1983 ◽  
Vol 92 (4-5) ◽  
pp. 99-104 ◽  
Author(s):  
Shinichi Yano ◽  
Kenji Tadano ◽  
Koichiro Aoki
Keyword(s):  
Crystalline Phase ◽  
Liquid Crystalline ◽  
Sodium Dodecylsulfate ◽  
Water System ◽  
Liquid Crystalline Phase ◽  
Conductivity Measurements

An X-ray and NMR investigation of the lamellar liquid crystalline phase in the octylamine/octylammonium chloride/water system

1987 ◽  
Vol 118 (1) ◽  
pp. 233-242 ◽  
Author(s):  
Torbjo¨rn Wa¨rnheim ◽  
Bjo¨rn Bergensta˚hl ◽  
Ulf Henriksson ◽  
Ann-Charlotte Malmvik ◽  
Peder Nilsson
Keyword(s):  
Crystalline Phase ◽  
Liquid Crystalline ◽  
Water System ◽  
Liquid Crystalline Phase ◽  
X Ray ◽  
Chloride Water

Rheological Properties of the Reverse Mesophases of the Pluronic L64/P-Xylene/Water System

2004 ◽  
Vol 14 (6) ◽  
pp. 315-323 ◽  
Author(s):  
Luigi Coppola ◽  
Domenico Gabriele ◽  
Isabella Nicotera ◽  
Cesare Oliviero
Keyword(s):  
Phase Transition ◽  
Crystalline Phase ◽  
Liquid Crystalline ◽  
Ternary Phase Diagram ◽  
Water System ◽  
Water Concentration ◽  
Liquid Crystalline Phase ◽  
Lamellar Phases ◽  
Different Temperatures ◽  
Mechanical Spectra

Abstract The behaviour of reverse micellar solution and reverse hexagonal and lamellar liquid crystal phases in pluronic L64/water/p-xylene ternary system was investigated by rheological techniques. Samples with an increasing water content along the amphiphilic copolymer-lean side of the ternary phase diagram were analysed at different temperatures and a different behaviour was evidenced by both dynamic and steady tests for each considered phase, depending on the morphology of structure (micellar, lamellar, hexagonal phases). It was observed that the reverse micelles size increases with increasing water concentration and decreases with increasing temperature, without any phase transition. On the contrary the normal micelles become anisometric on temperature, showing a transition to a liquid crystalline phase. The observed mechanical spectra of the liquid crystalline phases are typical of hexagonal and lamellar phases according to the literature [1, 2]. A phase transition with temperature was found for both liquid crystalline phase (lamellar and hexagonal) by rheological tests and was confirmed by ocular inspection.

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