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Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications
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Reduced Ice Adhesion Using Amphiphilic Poly(Ionic Liquid)-Based Surfaces.

Zahra Mossayebi1,2, Vianna F Jafari1, Paul A Gurr1

  • 1Department of Chemical Engineering, The University of Melbourne, Melbourne, Victoria 3010, Australia.

ACS Applied Materials & Interfaces
|January 28, 2023
PubMed
Summary
This summary is machine-generated.

New amphiphilic coatings using poly(ionic liquid) (PIL) segments demonstrate exceptionally low ice adhesion. These novel surfaces offer a promising solution for practical anti-icing applications by reducing ice buildup and associated economic losses.

Keywords:
PDMSamphiphilic coatingsanti-icingaqueous lubricating layerlow ice adhesionpoly(ionic liquids)

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Polymer Science

Background:

  • Ice accumulation on surfaces leads to substantial economic losses across various industries.
  • Developing surfaces with low ice adhesion is crucial for effective anti-icing solutions.
  • Poly(ionic liquid) (PIL)-based surfaces show potential for antifogging and frost-prevention, but their anti-icing capabilities require further investigation.

Purpose of the Study:

  • To design and synthesize novel amphiphilic triblock copolymers for anti-icing applications.
  • To investigate the structure-property relationships of these copolymers in semi-interpenetrating polymer networks (SIPNs).
  • To evaluate the ice adhesion strength and elucidate the de-icing mechanisms of the developed coatings.

Main Methods:

  • Synthesis of triblock copolymers comprising polydimethylsiloxane, poly([2 (methacryloyloxy)ethyl] trimethylammonium chloride) (PMETAC), and UV-cured with oligo(ethylene glycol) dimethacrylate (OEGDMA).
  • Systematic variation of counterion, PIL content, and cross-linker concentration to create diverse SIPNs.
  • Characterization of surface features, wettability, and hydration states to understand de-icing mechanisms.
  • Measurement of ice adhesion strength to quantify anti-icing performance.

Main Results:

  • Achieved an exceptionally low ice adhesion strength of 13.3 ± 8.6 kPa with a coating containing 12.5 wt % PMETAC and 5 wt % OEGDMA.
  • Identified self-lubrication, attributed to nonfreezable bound water, as the primary mechanism for low ice adhesion.
  • Demonstrated a strong correlation between coating composition, surface properties, and icephobic performance.

Conclusions:

  • The developed PIL-based SIPN coatings exhibit significant potential as effective icephobic surfaces.
  • The findings provide a new strategy for designing advanced anti-icing materials.
  • These coatings offer a promising avenue for mitigating ice-related economic impacts in industrial applications.