TY  - JOUR
A1  - Koetz, Joachim
A1  - Kosmella, Sabine
A1  - Brühl, Iris
T1  - Self-assembly of liquid crystalline lamellar surfactant-polyelectrolyte systems
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Koetz, Joachim
A1  - Brühl, Iris
A1  - Kosmella, Sabine
A1  - Reiche, Jürgen
A1  - Tiersch, Brigitte
T1  - Polyelectrolyte Complex Formation in Lamellar Liquid Crystalline Systems
N2  - The influence of polyelectrolytes on structure formation in liquid crystalline Na-dodecylsulfate/decanol/water systems was investigated by means of small angle X-ray diffraction, rheology, NMR spectroscopy, and microscopy. By adding Na-polyacrylate (PAA) into the mesophase, the one-phase region is left and phenomena of phase separation into a solvent-rich and a polymer/surfactantrich phase occurs. By incoporating an anionic and cationic polyelectrolyte step by step the tendency of phase separation is increased drastically. The self-organization process can be regulated directly by varying the water content of the system. However, at a water content of 30% the properties of the resulting liquid crystal were changed drastically. X-ray diffraction shows a multitude of Bragg peaks, NMR shows a peak-splitting, and rheology shows a change from non-Newtonian to Newtonian-flow behavior. On the basis of the experimental results an ordered multilayer associate structure can be assumed.
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Thomas, Steffen
A1  - Brühl, Iris
A1  - Heilmann, Dieter
A1  - Kleinpeter, Erich
T1  - 13 C NMR Chemical shift calculations for some substituted pyridines - a comparative consideration
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Koetz, Joachim
A1  - Brühl, Iris
A1  - Kosmella, Sabine
T1  - Polyelektrolytkomplexbildung in lyotrop flüssigkristallinen Systemen
Y1  - 1997
SN  - 3-8265-2908-1
ER  -