6533b854fe1ef96bd12ae16b
RESEARCH PRODUCT
Polymer-brush lubricated surfaces with colloidal inclusions under shear inversion.
Kurt BinderL. SpirinL. SpirinA. GaluschkoA. GaluschkoT. KreerT. KreerT. KreerJörg Baschnagelsubject
Materials scienceGeneral Physics and Astronomy02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnologyPolymer brush01 natural sciences0104 chemical sciencesSimple shearShear rateMolecular dynamicsColloidChemical physicsShear stress0210 nano-technologyShear flowScalingdescription
We characterize the response of compressed, sheared polymer-brush bilayers with colloidal inclusions to highly nonstationary inversion processes by means of molecular dynamics simulations and scaling theory. Bilayers with a simple (dimeric) solvent reveal an overshoot for the shear stress, while simulations of dry brushes without explicit solvent molecules fail to display this effect. We demonstrate that mechanical instabilities can be controlled by the inclusion of macromolecular structures, such as colloids of varying softness. Based on a recently developed theory, we suggest a scaling approach to determine a characteristic time for conformational and collective responses.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-04-20 | Physical review letters |