Spontaneous jumping, bouncing and trampolining of hydrogel drops on a heated plate

Jonathan T. Pham; Maxime Paven; Sanghyuk Wooh; Tadashi Kajiya; Hans Jürgen Butt; Doris Vollmer

doi:10.1038/s41467-017-01010-8

Spontaneous jumping, bouncing and trampolining of hydrogel drops on a heated plate

Jonathan T. Pham, Maxime Paven, Sanghyuk Wooh, Tadashi Kajiya, Hans Jürgen Butt, Doris Vollmer

Chemical and Materials Engineering

Research output: Contribution to journal › Article › peer-review

40 Scopus citations

Abstract

The contact between liquid drops and hot solid surfaces is of practical importance for industrial processes, such as thermal spraying and spray cooling. The contact and bouncing of solid spheres is also an important event encountered in ball milling, powder processing, and everyday activities, such as ball sports. Using high speed video microscopy, we demonstrate that hydrogel drops, initially at rest on a surface, spontaneously jump upon rapid heating and continue to bounce with increasing amplitudes. Jumping is governed by the surface wettability, surface temperature, hydrogel elasticity, and adhesion. A combination of low-adhesion impact behavior and fast water vapor formation supports continuous bouncing and trampolining. Our results illustrate how the interplay between solid and liquid characteristics of hydrogels results in intriguing dynamics, as reflected by spontaneous jumping, bouncing, trampolining, and extremely short contact times.

Original language	English
Article number	905
Journal	Nature Communications
Volume	8
Issue number	1
DOIs	https://doi.org/10.1038/s41467-017-01010-8
State	Published - Dec 1 2017

Bibliographical note

Publisher Copyright:
© 2017 The Author(s).

Funding

We thank Doroto Truszkowska for help with the infrared camera. This work was supported by an Alexander von Humboldt postdoctoral fellowship (J.T.P.), the EU’s Horizon 2020 research and innovation program No. 722497—LubISS (D.V.), and the ERC advanced grant SUPRO 340391 and ITN COWET (H.-J.B.).

Funders	Funder number
Alexander Von Humboldt Foundation
ERC Advanced	SUPRO 340391
EU’s Horizon 2020	722497—LubISS
ITN COWET
Horizon 2020 Framework Programme	340391, 722497

ASJC Scopus subject areas

General Chemistry
General Biochemistry, Genetics and Molecular Biology
General Physics and Astronomy

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10.1038/s41467-017-01010-8

Cite this

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abstract = "The contact between liquid drops and hot solid surfaces is of practical importance for industrial processes, such as thermal spraying and spray cooling. The contact and bouncing of solid spheres is also an important event encountered in ball milling, powder processing, and everyday activities, such as ball sports. Using high speed video microscopy, we demonstrate that hydrogel drops, initially at rest on a surface, spontaneously jump upon rapid heating and continue to bounce with increasing amplitudes. Jumping is governed by the surface wettability, surface temperature, hydrogel elasticity, and adhesion. A combination of low-adhesion impact behavior and fast water vapor formation supports continuous bouncing and trampolining. Our results illustrate how the interplay between solid and liquid characteristics of hydrogels results in intriguing dynamics, as reflected by spontaneous jumping, bouncing, trampolining, and extremely short contact times.",

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Spontaneous jumping, bouncing and trampolining of hydrogel drops on a heated plate

Abstract

Bibliographical note

Funding

ASJC Scopus subject areas

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