28 May 2017 to 2 June 2017
Queen's University
America/Toronto timezone
Welcome to the 2017 CAP Congress! / Bienvenue au congrès de l'ACP 2017!

Capillary Levelling of Cylindrical Holes in Freestanding Polymer Films

29 May 2017, 14:30
15m
BioSci 1102 (Queen's University)

BioSci 1102

Queen's University

CLOSED - Oral (Student, In Competition) / Orale (Étudiant(e), inscrit à la compétition) Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM) M3-1 Soft Matter (DCMMP/SMC17) | Matière molle (DPMCM/MMC17)

Speaker

Mr John Niven (McMaster University)

Description

Studying nano-scale flow in thin viscous films is of both practical and theoretical interest, particularly when considering the role of the hydrodynamic boundary conditions. Here, thin bilayer polystyrene films were prepared freestanding in air, with one of the two films having micrometer scale cylindrical holes. Because of the free interfaces, such films flow without interfacial friction at either surface. The viscoelastic relaxation of the holes was studied using atomic force microscopy. The temporal evolution of the holes shows three distinct regimes: an early time regime where the film has an elastic response; an intermediate regime where the hole undergoes viscoelastic symmetrization to equilibrate internal Laplace pressure; and a late time regime where the film undergoes capillary driven flow.

Primary author

Mr John Niven (McMaster University)

Co-authors

Dr Thomas Salez (ESPCI Paris) Mr Paul Fowler (McMaster University) Mr Howard Stone (Princeton University) Mr Elie Raphael (ESPCI Paris) Mr Kari Dalnoki-Veress (McMaster University)

Presentation Materials

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