Effects of Solubilized Hydrocarbons on the Structure and the Dislocation Pattern in a Lamellar Liquid Crystal

Abstract The structure and dislocation pattern in a lamellar liquid crystal from water and polyoxyethylene dodecyl ether were studied for the effects of solubilization of large amounts of hydrocarbon using low angle X-ray diffraction and optical microscopy. The X-ray data showed extremely small changes of interlayer spacings with added aromatic hydrocarbons indicating them to be located within the amphiphilic layer of surfactant and water. Addition of the aliphatic hydrocarbon gave an increase of the lamellar distance equal to or even in excess of the one for non-penetrative addition indicating a change in the direction of the amphiphilic substances. The lamellar liquid crystal containing only water and surfactant showed a pattern of enhanced presence of focal conic dislocations with increased surfactant concentration for tetraoxyethylene dodecyl ether. For pentaoxyethylene dodecyl ether with a hydrophilic character this trend was observed after enhancing the lipophilic part by addition of hydrocarbon.

[1]  J. Israelachvili,et al.  Measurement of forces between two mica surfaces in aqueous electrolyte solutions in the range 0–100 nm , 1978 .

[2]  R. Rand,et al.  Measurement and modification of forces between lecithin bilayers. , 1977, Biophysical journal.

[3]  M. Costello,et al.  Defect structures in lyotropic smectic phases revealed by freeze-fracture electron microscopy , 1977 .

[4]  Par Maurice Kleman.  Dislocations vis et surfaces minima dans les smectiques A , 1976 .

[5]  M. Kleman.  Remarks on a possible elasticity of membranes and lamellar media: disordered layers , 1976, Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences.

[6]  N. Boden,et al.  Intramolecular disorder and its relation to mesophase structure in lyotropic liquid crystals , 1976 .

[7]  G. H. Brown,et al.  Liquid crystals and plastic crystals: Volume 1. Edited by G. W. Gray and P. A. Winsor. Pp. 383. Halsted Press, New York, 1974. Price: $32.50 , 1975 .

[8]  A. Tracey,et al.  Membrane processes. VII. Hydrocarbon chain motions and the effect of changing counterions , 1975 .

[9]  O. Parodi,et al.  Covariant elasticity for smectics A , 1975 .

[10]  B. Derjaguin,et al.  Structural component of disjoining pressure , 1974 .

[11]  A. Tracey,et al.  Membrane processes. IV. Structure of the acetate ion and degree of orientation of the ionic head groups in the electrical double layer , 1974 .

[12]  K. Shinoda,et al.  Microemulsions and phase equilibria--mechanism of the formation of so-called microemulsions studied in connection with phase diagram , 1974 .

[13]  P. Manneville,et al.  Magnetic resonance of perdeuterated potassium laurate in oriented soap-water multilayers , 1973 .

[14]  B. Lindman,et al.  The Interaction between Halide Ions and Amphiphilic Organic Cations in Aqueous Solutions Studied by Nuclear Quadrupole Relaxation , 1973 .

[15]  K. Shinoda,et al.  Conditions to produce so-called microemulsions: Factors to increase the mutual solubility of oil and water by solubilizer , 1973 .

[16]  Y. Bouligand,et al.  Recherches sur les textures des états mésomorphes - 1. Les arrangements focaux dans les smectiques : rappels et considérations théoriques , 1972 .

[17]  K. Shinoda.  Thermodynamic aspects of nonionic surfactant—Water systems , 1970 .

[18]  S. Friberg,et al.  NMR and IR investigation of the conditions determining the stability of microemulsions , 1970 .

[19]  K. Shinoda,et al.  The stability of W/O type emulsions as a function of temperature and of the hydrophilic chain length of the emulsifier , 1970 .

[20]  D. Park,et al.  The structure of micellar solutions of ionic amphiphiles: The lamellar phase. X-ray diffraction measurements with the aerosol OT/water system , 1970 .

[21]  L. Mandell,et al.  Solutions of alkali soaps and water in fatty acids , 1969 .

[22]  L. Mandell,et al.  Solubilization in Micelles and Mesophases and the Transition from Normal to Reversed Structures , 1969 .

[23]  S. Forsén,et al.  Nuclear quadrupole relaxation of bromine-79 in aqueous solutions of quaternary ammonium bromides , 1968 .

[24]  K. Shinoda,et al.  The solubilization of hydrocarbons in aqueous solutions of nonionic surfactants , 1967 .

[25]  T. Ogawa,et al.  The solubilization of water in nonaqueous solutions of nonionic surfactants , 1967 .

[26]  K. Shinoda.  The correlation between the dissolution state of nonionic surfactant and the type of dispersion stabilized with the surfactant , 1967 .

[27]  A. Skoulios.  La structure des solutions aqueuses concentrées de savon , 1967 .

[28]  A. Skoulios,et al.  Solubilization studies in aqueous gels of amphiphilic compounds , 1966 .

[29]  C. Djerassi,et al.  Preliminary IR and NMR investigations on the alkali soap - carboxylxic acid - water systems , 1966 .

[30]  V. Luzzati,et al.  La structure des colloïdes d'association. I. Les phases liquide–cristallines des systèmes amphiphile–eau , 1960 .

[31]  P. Ekwall,et al.  Assoziations- und Phasengleichgewichte bei der Einwirkung von Paraffinkettenalkoholen an wässrigen Lösungen von Assoziationskolloiden , 1960 .

[32]  G. Friedel,et al.  Les états mésomorphes de la matière , 1922 .