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Published on: February 4, 2013
Instant fabrication and selection of folded structures using drop impact.
Arnaud Antkowiak1, Basile Audoly, Christophe Josserand
1Centre National de Recherche Scientifique and Université Pierre et Marie Curie, Unité Mixte de Recherche 7190, Institut Jean Le Rond d'Alembert, 4 Place Jussieu, F-75005 Paris, France. arnaud.antkowiak@upmc.fr
Summary
Impact dynamics of a liquid drop on a polymer film create 3D structures. Varying impact parameters allows for precise shape selection, offering mass production possibilities for custom 3D packages.
Area of Science:
- Fluid dynamics
- Polymer science
- Materials science
Background:
- Liquid drop impacts on surfaces can induce complex deformations.
- Capillary forces and inertia play crucial roles in dynamic interfacial phenomena.
- Controlling the shape of thin films during impact is challenging.
Purpose of the Study:
- To investigate the dynamics of a liquid drop impacting a polymer film with a target cutout.
- To understand the role of capillary forces and inertia in film wrapping.
- To explore the potential for controlled 3D structure formation and shape selection.
Main Methods:
- Experimental observation of drop impact dynamics on polymer films.
- Systematic variation of impact parameters.
- Development and application of a simplified nonlinear dynamic Elastica model coupled with a drop.
Main Results:
- The polymer film dynamically wraps around the impacting drop.
- Different 3D structures are achievable by tuning impact parameters.
- The proposed model accurately predicts shape selection and quantitative experimental results.
Conclusions:
- Elastocapillary dynamics govern the formation of 3D structures from drop impacts on polymer films.
- Precise control over 3D package shapes is possible through parameter variation.
- This research opens avenues for the mass production of custom 3D packages.
