Well-controlled foam-based solid coatings
| Autor: | Olivier Pitois, Tamar Saison, Aymeric Mouquet, Jean-Yvon Faou, Yacine Khidas |
|---|---|
| Přispěvatelé: | Laboratoire Navier (navier umr 8205), École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR), Surface du Verre et Interfaces (SVI), Centre National de la Recherche Scientifique (CNRS), Saint Gobain Recherche |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Aqueous solution
Materials science Bubble Nozzle Dispersity Mixing (process engineering) 02 engineering and technology General Chemistry Radius engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Coating engineering Crystallite Composite material 0210 nano-technology [PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft] |
| Zdroj: | Soft Matter Soft Matter, Royal Society of Chemistry, 2019, 15 (25), pp.5084-5093. ⟨10.1039/c9sm00786e⟩ |
| ISSN: | 1744-683X 1744-6848 |
| Popis: | International audience; Foam-based solid coatings appear to be a simple solution for giving new properties to solid surfaces. An efficient method is presented for producing open-cell foam coatings having tunable pore radius distribution (i.e. monodisperse within the range 100-1000 µm, bidisperse or fully polydisperse), tunable thickness, and tunable bulk and surface porosities. This is achieved by mixing precursor aqueous foam and particle suspension (here a micrometer-sized polyurethane dispersion), and by spreading with a nozzle the resulting particle-loaded foam on the solid surface to be coated. It is shown that bubble size distribution of the precursor foam can be preserved in the final solid coating. This this highlighted by using monodisperse aqueous foam, for which coatings showed polycrystalline structure, as well as bidisperse or fully polydisperse foams. As a major advantage of our method, bubble size and solid volume fraction are shown to be independent parameters allowing for the size of the microstructural elements to be tuned easily, so are the expected functional properties of the coating. Results obtained with the studied polyurethane dispersion are expected to be reproduced with other dispersions. |
| Databáze: | OpenAIRE |
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