TY  - JOUR
AU  - Holderer, O.
AU  - Frielinghaus, H.
AU  - Byelov, D.
AU  - Monkenbusch, M.
AU  - Allgaier, J.
AU  - Richter, D.
TI  - Dynamical Properties of Decorated Lamellar Microemulsions in the Brush Regime
JO  - Zeitschrift für Physikalische Chemie
VL  - 224
IS  - 1-2
SN  - 0942-9352
CY  - München
PB  - Oldenbourg
M1  - PreJuSER-8964
PY  - 2010
N1  - Record converted from VDB: 12.11.2012
AB  - The elastic constants of bicontinuous microemulsions, consisting of water, oil (decane) and a surfactant. can be modified by the addition of diblock-copolymers (boosting effect). A similar decoration of the surfactant membrane is possible in the lamellar phase. At high diblock copolymer densities, in the brush regime, a change in the dependence of the bending rigidity on the molecular size and concentration of the diblock copolymer is predicted theoretically. In particular a very strong dependence of the bending rigidity on the radius of gyration of the diblock copolymer (kappa proportional to R-5) is predicted. We have studied the structure and dynamics of lamellar microemulsions by small angle neutron scattering (SANS) and neutron spin echo spectroscopy (NSE) in the brush regime, with high diblock copolymer density. Decyl polyglycol ether (C10E4) has been used as surfactant, the amphiphilic diblock-copolymers were polyethylenepropylene/polyethyleneoxide (PEP5-PEO5). The influence of the diblock copolymer concentration when entering the brush regime on the bending rigidity K and the correlation length xi will be discussed.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000275275000014
DO  - DOI:10.1524/zpch.2010.6102
UR  - https://juser.fz-juelich.de/record/8964
ER  -