Bilayer curling and winding in a viscous fluid

Abstract : Induced spontaneous curvature is a new mechanism of microcapsules bursting by nucleation and growth of a hole surrounded by a curling rim. Here we study the dynamics of curling on a macroscopic scale induced by the elastic curvature of a bilayer of tracing paper and tape after soaking by water. The ribbon which is fully stretched at time t = 0 is immersed in a viscous oil. We observe the winding from the free end and find two regimes: rolling at constant velocity at short times, and a slowdown at long times. We interpret these two regimes by a balance of the elastic driving force and the friction force on the roll.
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Submitted on : Tuesday, May 27, 2014 - 9:02:31 PM
Last modification on : Wednesday, March 27, 2019 - 4:39:25 PM

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Loic Tadrist, Francoise Brochard-Wyart, Damien Cuvelier. Bilayer curling and winding in a viscous fluid. Soft Matter, Royal Society of Chemistry, 2012, 8 (32), pp.8517-8522. ⟨10.1039/c2sm25860a⟩. ⟨hal-00996500⟩

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