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Well-controlled foam-based solid coatings.

A Mouquet1, Y Khidas, T Saison

  • 1Université Paris Est, Laboratoire Navier, UMR 8205 CNRS -École des Ponts ParisTech - IFSTTAR cité Descartes, 2 allée Kepler, 77420 Champs-sur-Marne, France. aymeric.mouquet@gmail.com olivier.pitois@ifsttar.fr.

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Researchers developed a novel method to create tunable open-cell foam coatings on surfaces. This technique allows precise control over pore size, thickness, and porosity for advanced material properties.

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Area of Science:

  • Materials Science and Engineering
  • Surface Chemistry and Coatings
  • Nanotechnology and Microfabrication

Background:

  • Solid surfaces often require modification to impart new functionalities.
  • Foam-based coatings offer a promising route for surface property enhancement.
  • Existing methods lack precise control over coating microstructure and properties.

Purpose of the Study:

  • To present an efficient method for producing tunable open-cell foam coatings.
  • To demonstrate control over pore size distribution, thickness, and porosity.
  • To enable tailored functional properties for coated surfaces.

Main Methods:

  • Mixing a precursor aqueous foam with a particle suspension (e.g., polyurethane dispersion).
  • Spreading the particle-loaded foam onto a solid surface using a nozzle.
  • Characterizing the resulting coating's microstructure and porosity.

Main Results:

  • Achieved tunable pore radius distribution (100-1000 μm, monodisperse, bidisperse, polydisperse).
  • Demonstrated independent control over bubble size and solid volume fraction.
  • Preserved precursor foam's bubble size distribution in the final solid coating.

Conclusions:

  • The presented method offers versatile control over foam coating architecture.
  • Independent tuning of microstructural elements allows for tailored functional properties.
  • The technique is adaptable for various particle dispersions beyond polyurethane.