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Title: Non-fluorinated, sustainable, and durable superhydrophobic microarrayed surface for water-harvesting
Author: Rius Ayra, Oriol
Fiestas-Paradela, Sheil
Llorca i Isern, Núria
Keywords: Superfícies hidrofòbiques
Conservació de l'aigua
Durabilitat (Enginyeria)
Desenvolupament sostenible
Hydrophobic surfaces
Water conservation
Service life (Engineering)
Sustainable development
Issue Date: 26-Mar-2020
Publisher: American Chemical Society
Abstract: Water scarcity is a worldwide issue that significantly affects the environment, population, and economy of the arid zones. In this study, we report a straightforward method for water-harvesting based on modifications of the surface wettability. Using magnesium chloride, lauric acid, and electrodeposition process, a superhydrophobic surface (155°) is obtained. Morphological characterization techniques allow determination of the characteristic flower-like microstructures combined with close packed nanoarrays that lead to the hierarchical structure. Furthermore, the coating presents vertically aligned microarrays in a non-linear cone morphology formed by dynamic templating of hydrogen bubbles. From a chemical point of view, magnesium laurate is responsible for the surface tension decrease. To determine the durability of the obtained surface ultra-violet (UV) light test and abrasive paper test, tests are carried out revealing high durability against these severe conditions. The water-harvesting ability of the superhydrophobic surface is studied at 45° and 90° tilted samples. The capacity of the water to be harvested efficiently is found to be at 90° tilt under fog conditions. The use of green reactants associated with this hierarchical structure broadens a new scope for sustainable freshwater collection and it becomes an excellent example of a green solution.
Note: Versió postprint del document publicat a:
It is part of: ACS Applied Materials & Interfaces, 2020, vol. 10, num. 4, p. 314
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ISSN: 1944-8244
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)

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