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Related Experiment Video

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Novel Superhydrophobic Surface with Solar-Absorptive Material for Improved De-Icing Performance.

Joseph Gonzales1, Daiki Kurihara2, Tetsuro Maeda2

  • 1Department of Aerospace and Mechanical Engineering, University of Notre Dame, White Field Research Laboratory, Notre Dame, IN 46556, USA.

Materials (Basel, Switzerland)
|August 31, 2019
PubMed
Summary

Researchers developed a new superhydrophobic surface by adding graphite to polytetrafluoroethylene (PTFE). This enhanced surface absorbs more solar heat, reducing de-icing time for ice accretion on infrastructure and aircraft.

Keywords:
superhydrophobic coatingthermal management

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Area of Science:

  • Materials Science
  • Surface Engineering
  • Aerospace Engineering

Background:

  • Ice accretion poses significant risks to industries like aviation, power generation, and infrastructure.
  • Current de-icing methods often rely on heating elements combined with superhydrophobic surfaces to minimize energy use.
  • Further energy savings are possible by enhancing passive heat generation via solar radiation absorption.

Purpose of the Study:

  • To engineer and characterize a novel superhydrophobic surface with enhanced solar radiation absorption for improved de-icing efficiency.
  • To investigate the impact of incorporating graphite microparticles into a polytetrafluoroethylene (PTFE) microstructure on surface properties and solar absorptivity.
  • To evaluate the de-icing performance of the modified surface under simulated icing conditions.

Main Methods:

  • Modification of an existing polytetrafluoroethylene (PTFE) superhydrophobic surface by incorporating graphite microparticles.
  • Characterization of surface hydrophobicity using contact and roll-off angle measurements.
  • Quantification of solar radiation absorptivity coefficient.
  • Testing of the modified coating in an icing wind tunnel to assess ice melting times.

Main Results:

  • The graphite-modified surface exhibited hydrophobic performance comparable to the original PTFE surface, with contact and roll-off angles within 2.5% of the original.
  • The proposed coating demonstrated a 35% increase in solar radiation absorptivity compared to standard PTFE coatings.
  • Significant reductions in ice melting time were observed: 8.5% for rime ice and 50% for glaze ice.

Conclusions:

  • The addition of graphite microparticles to PTFE superhydrophobic surfaces effectively enhances solar absorption without compromising hydrophobicity.
  • This novel surface technology offers a promising pathway for more energy-efficient passive de-icing solutions.
  • The improved performance in reducing ice melting times has significant implications for operational safety and efficiency in various industries affected by ice accretion.