This title appears in the Scientific Report :
2010
Please use the identifier:
http://dx.doi.org/10.1524/zpch.2010.6102 in citations.
Please use the identifier: http://hdl.handle.net/2128/18348 in citations.
Dynamical Properties of Decorated Lamellar Microemulsions in the Brush Regime
Dynamical Properties of Decorated Lamellar Microemulsions in the Brush Regime
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, i...
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Personal Name(s): | Holderer, O. |
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Frielinghaus, H. / Byelov, D. / Monkenbusch, M. / Allgaier, J. / Richter, D. | |
Contributing Institute: |
JCNS; JCNS Neutronenstreuung; IFF-5 Streumethoden; IFF-4 |
Published in: | Zeitschrift für Physikalische Chemie, 224 (2010) 1-2, |
Imprint: |
München
Oldenbourg
2010
|
DOI: |
10.1524/zpch.2010.6102 |
Document Type: |
Journal Article |
Research Program: |
Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung |
Series Title: |
Zeitschrift für physikalische Chemie
224 |
Subject (ZB): | |
Link: |
Get full text OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/18348 in citations.
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. |