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

Author

Listed:
  • Jonathan T. Pham

    (Max Planck Institute for Polymer Research
    University of Kentucky)

  • Maxime Paven

    (Max Planck Institute for Polymer Research)

  • Sanghyuk Wooh

    (Max Planck Institute for Polymer Research
    Chung-Ang University)

  • Tadashi Kajiya

    (Max Planck Institute for Polymer Research
    Analysis Technology Center, Fujifilm R&D)

  • Hans-Jürgen Butt

    (Max Planck Institute for Polymer Research)

  • Doris Vollmer

    (Max Planck Institute for Polymer Research)

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.

Suggested Citation

  • Jonathan T. Pham & Maxime Paven & Sanghyuk Wooh & Tadashi Kajiya & Hans-Jürgen Butt & Doris Vollmer, 2017. "Spontaneous jumping, bouncing and trampolining of hydrogel drops on a heated plate," Nature Communications, Nature, vol. 8(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-01010-8
    DOI: 10.1038/s41467-017-01010-8
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