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Discontinuity-enhanced icephobic surfaces for low ice adhesion.

Pablo F Ibáñez Ibáñez1, Luca Stendardo2, Catalina Ospina2

  • 1Laboratory of Surface and Interface Physics, Department of Applied Physics, University of Granada, Granada 18071, Spain; Laboratory of Surface Engineering and Fluid Interfaces, Department of Materials Science, University of Milano-Bicocca, Milano 20125, Italy.

Journal of Colloid and Interface Science
|October 4, 2024
PubMed
Summary

Discontinuity-enhanced icephobic surfaces with patterned rigid and soft areas reduce ice adhesion. Stress concentration at rigid-soft boundaries promotes crack initiation and detachment, improving durability for low ice-adhesion applications.

Keywords:
Durable surfacesIcephobicInterfacial fractureLow ice adhesion

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Area of Science:

  • Materials Science
  • Surface Engineering
  • Tribology

Background:

  • Low ice-adhesion surfaces often use soft materials, posing durability challenges.
  • Composite surfaces with patterned rigid and soft areas offer a potential solution.
  • This study introduces discontinuity-enhanced icephobic surfaces.

Purpose of the Study:

  • To investigate the ice detachment mechanism on composite surfaces with discontinuities.
  • To explore how stress concentration at rigid-soft interfaces influences ice adhesion.
  • To demonstrate the effectiveness of discontinuity-enhanced surfaces for reduced ice adhesion.

Main Methods:

  • Fabrication of composite model surfaces with varying rigid-soft ratios and discontinuity lengths.
  • Measurement of ice adhesion values with in-situ interface recording.
  • Complementary numerical simulations to understand ice detachment mechanisms.

Main Results:

  • Stress concentrates at the discontinuity lines between rigid and soft areas.
  • Novel non-unidirectional crack propagation observed, initiating on rigid and propagating to soft areas.
  • Increased discontinuities enhance crack initiation and reduce ice adhesion.

Conclusions:

  • Discontinuity-enhanced surfaces effectively reduce ice adhesion.
  • Stress concentration at elastic discontinuities is key to ice detachment.
  • This approach offers a durable solution for low ice-adhesion applications.