TY  - JOUR
A1  - Schulze, Nicole
A1  - Tiersch, B.
A1  - Zenke, I.
A1  - Koetz, Joachim
T1  - Polyampholyte-tuned lyotrop lamellar liquid crystalline systems
JF  - COLLOID AND POLYMER SCIENCE
N2  - The influence of a polyampholyte, i.e., poly(N,N’-diallyl-N,N’-dimethyl-altmaleamic carboxylate) (PalH), on the lamellar liquid crystalline (LC) system sodium dodecyl sulfate (SDS)/decanol/water was investigated by means of microdifferential scanning calorimetry, small-angle X-ray diffraction (SAXS), and cryo-scanning electron microscopy. After incorporating PalH into the lamellar liquid crystalline system, SAXS measurements show that three different LC phases exist: i.e., a swelling, slightly swelling, and non-swelling one. At pH 4, the positively charged polymer with an extended conformation can directly adsorb at the anionic head groups of the surfactant and more compact vesicles are formed at room temperature. At pH 9, the electrostatic interactions between the polyampholyte (in a more coiled conformation) and the sulfate head groups of the SDS are leveled off and incompact vesicles are formed at room temperature. That means in presence of the polyampholyte the morphology of the LC phase, i.e., the supramolecular vesicle structure, can be tuned by varying the pH and/or the temperature.
KW  - Polyampholytes
KW  - Lamellar liquid crystals
KW  - Vesicle formation
KW  - SAXS
KW  - Cryo-SEM
KW  - mu-DSC
Y1  - 2013
U6  - https://doi.org/10.1007/s00396-013-2999-5
SN  - 0303-402X
SN  - 1435-1536
VL  - 291
IS  - 11
SP  - 2551
EP  - 2559
PB  - SPRINGER
CY  - NEW YORK
ER  -