Dynamical Properties of Decorated Lamellar Microemulsions in the Brush Regime
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O Holderer
Abstract
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 (κ ∝ R5) 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 κ and the correlation length ξ will be discussed.
© by Oldenbourg Wissenschaftsverlag, München, Germany
Artikel in diesem Heft
- Preface
- Editorial - Ad Memoriam Michael Prager
- Introduction to Quasielastic Neutron Scattering
- Recent Backscattering Instrument Developments at the ILL and SNS
- Surface Diffusion Studies Using Neutron and Helium Spin-echo Spectroscopy
- Slow Dynamics in Liquid Metals as Seen by QENS
- Are the Glass Forming Properties of Glycerol Changed when Disrupting the Hydrogen Bond Network by Addition of Silica Nanospheres?
- The Dynamic Response Function χT(Q,t) of Confined Supercooled Water and its Relation to the Dynamic Crossover Phenomenon
- Dynamics of Propylene adsorbed in Na-Y and Na-ZSM5 Zeolites: A QENS and MD Simulation Study
- Dynamics in Clays - Combining Neutron Scattering and Microscopic Simulation
- Concrete and Cement Paste Studied by Quasi-Elastic Neutron Scattering
- Dynamics in Biological Systems as seen by QENS
- Study of Protein Dynamics vs. Amyloid Formation
- Dynamics of Nanostructures for Drug Delivery: the Potential of QENS
- Dynamical Properties of Decorated Lamellar Microemulsions in the Brush Regime
- Monomer Dynamics in SDS Micellar Solution
- Hydrogen Dynamics in Lightweight Tetrahydroborates
- Dynamics of Caged Hydronium Ions and Super-protonic Conduction in (H3O)SbTeO6
Artikel in diesem Heft
- Preface
- Editorial - Ad Memoriam Michael Prager
- Introduction to Quasielastic Neutron Scattering
- Recent Backscattering Instrument Developments at the ILL and SNS
- Surface Diffusion Studies Using Neutron and Helium Spin-echo Spectroscopy
- Slow Dynamics in Liquid Metals as Seen by QENS
- Are the Glass Forming Properties of Glycerol Changed when Disrupting the Hydrogen Bond Network by Addition of Silica Nanospheres?
- The Dynamic Response Function χT(Q,t) of Confined Supercooled Water and its Relation to the Dynamic Crossover Phenomenon
- Dynamics of Propylene adsorbed in Na-Y and Na-ZSM5 Zeolites: A QENS and MD Simulation Study
- Dynamics in Clays - Combining Neutron Scattering and Microscopic Simulation
- Concrete and Cement Paste Studied by Quasi-Elastic Neutron Scattering
- Dynamics in Biological Systems as seen by QENS
- Study of Protein Dynamics vs. Amyloid Formation
- Dynamics of Nanostructures for Drug Delivery: the Potential of QENS
- Dynamical Properties of Decorated Lamellar Microemulsions in the Brush Regime
- Monomer Dynamics in SDS Micellar Solution
- Hydrogen Dynamics in Lightweight Tetrahydroborates
- Dynamics of Caged Hydronium Ions and Super-protonic Conduction in (H3O)SbTeO6
