ILTON, Mark; SALEZ, Thomas; FOWLER, Paul; RIVETTI, Marco; ALY, Mohammed; BENZAQUEN, Michael; MCGRAW, Joshua; RAPHAËL, Elie; DALNOKI-VERESS, Kari; BÄUMCHEN, Oliver

doi:10.1038/s41467-018-03610-4

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ILTON, Mark
Polymer Science and Engineering Department [Massachusetts]
Department of Physics and Astronomy [Hamilton, ON]

SALEZ, Thomas
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Global Station for Soft Matter, Global Institution for Collaborative Research and Education [Hokkaido]
Laboratoire de Physico-Chimie Théorique [LPCT]

FOWLER, Paul
Department of Physics and Astronomy [Hamilton, ON]
Max-Planck-Institut für Dynamik und Selbstorganisation [MPIDS]

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Ce document a été publié dans

Nature Communications. 2018-12, vol. 9, p. 1172

Nature Publishing Group

Résumé en anglais

Hydrodynamic slip, the motion of a liquid along a solid surface, represents a fundamental phenomenon in fluid dynamics that governs liquid transport at small scales. For polymeric liquids, de Gennes predicted that the Navier boundary condition together with polymer reptation implies extraordinarily large interfacial slip for entangled polymer melts on ideal surfaces; this Navier-de Gennes model was confirmed using dewetting experiments on ultrasmooth, low-energy substrates. Here, we use capillary leveling—surface tension driven flow of films with initially non-uniform thickness—of polymeric films on these same substrates.Measurement of the slip length from a robust one parameter fit to a lubrication model is achieved. We show that at the low shear rates involved in leveling experiments as compared to dewetting ones, the employed substrates can no longer be considered ideal. The data is instead consistent with a model that includes physical adsorption of polymer chains at the solid/liquid interface.< Réduire

DOI

http://dx.doi.org/10.1038/s41467-018-03610-4

Project ANR

Paris Sciences et Lettres

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Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798