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Wetting transitions in droplet drying on soft materials

Author

Listed:
  • Julia Gerber

    (ETH Zurich)

  • Tobias Lendenmann

    (ETH Zurich)

  • Hadi Eghlidi

    (ETH Zurich)

  • Thomas M. Schutzius

    (ETH Zurich)

  • Dimos Poulikakos

    (ETH Zurich)

Abstract

Droplet interactions with compliant materials are familiar, but surprisingly complex processes of importance to the manufacturing, chemical, and garment industries. Despite progress—previous research indicates that mesoscopic substrate deformations can enhance droplet drying or slow down spreading dynamics—our understanding of how the intertwined effects of transient wetting phenomena and substrate deformation affect drying remains incomplete. Here we show that above a critical receding contact line speed during drying, a previously not observed wetting transition occurs. We employ 4D confocal reference-free traction force microscopy (cTFM) to quantify the transient displacement and stress fields with the needed resolution, revealing high and asymmetric local substrate deformations leading to contact line pinning, illustrating a rate-dependent wettability on viscoelastic solids. Our study has significance for understanding the liquid removal mechanism on compliant substrates and for the associated surface design considerations. The developed methodology paves the way to study complex dynamic compliant substrate phenomena.

Suggested Citation

  • Julia Gerber & Tobias Lendenmann & Hadi Eghlidi & Thomas M. Schutzius & Dimos Poulikakos, 2019. "Wetting transitions in droplet drying on soft materials," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12093-w
    DOI: 10.1038/s41467-019-12093-w
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    Cited by:

    1. Ting-Pi Sun & Franco Álvarez-Novoa & Klebbert Andrade & Pablo Gutiérrez & Leonardo Gordillo & Xiang Cheng, 2022. "Stress distribution and surface shock wave of drop impact," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. Tian, Weibing & Wu, Keliu & Feng, Dong & Gao, Yanling & Li, Jing & Chen, Zhangxin, 2023. "Dynamic contact angle effect on water-oil imbibition in tight oil reservoirs," Energy, Elsevier, vol. 284(C).

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