[article]
| Titre : |
Robust patterned superoleophobic platform for efficient water harvesting |
| Type de document : |
texte imprimé |
| Auteurs : |
Pan Li, Auteur ; Chenyang Zhao, Auteur ; Shan Peng, Auteur |
| Année de publication : |
2023 |
| Article en page(s) : |
p. 2019-2029 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Amphiphobie
Brouillard
Eau - Récupération
Hydrophilie
Morphologie (matériaux)
Oléophobie
Procédés de fabrication
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
With the development of global industry and the increase of population, the shortage of freshwater resources has become a serious global challenge to the sustainable development of human society, prompting in-depth research on advanced water-harvesting technologies. However, the existing methods have many defects, such as easy pollution, insufficient water transportation speed, low water collection efficiency, complex preparation process, expensive raw materials, and so on. Here, inspired by natural organisms, such as beetles and cactus thorns, a new patterned surface combining a superamphiphobic region and a triangular fluorosurfactant (capstone FS50)-modified hydrophilic region has been designed for efficient and rapid water collection and condensation. The superamphiphobic part has an efficient water transmission capacity. On the one hand, owing to a good hydrophilic property, the FS50-modified part efficiently collects fog droplets that are further condensed into much larger water droplets. On the other hand, many large water drops condensed on the superamphiphobic region easily roll onto the hydrophilic FS50-modified surface, and form much larger droplets when combined with the original ones. The patterned surface achieves a very large water collection rate (WCR) of 20.6 mg min−1 cm−2, which is much larger than others reported in previous papers, while it is 1.5 and 1.3 times than that of single superamphiphobic and FS50-modified surfaces. Since both the patterns show superior oil repellency, it presents good resistance to organic pollution, resulting in very superior chemical stability and recyclability. Even after water collection for 60 cycles, the patterned surface can still reach a WCR value of 18 mg min−1 cm−2. The patterned surfaces also collect acid fog, alkali fog, and hot water fog when their WCR values are 20.1, 19.8, and 20.5 mg min−1 cm−2, respectively. This work has found a new patterned superoleophobic surface for efficient water collection, which achieves robust mechanical durability and chemical stability. |
| Note de contenu : |
- MATERIALS AND METHODS : Materials - Fabrication methods of various samples
- RESULTS AND DISCUSSION : Fabrication process of the patterned surface - Morphology and composition of the patterned surface - Wettability summary and demonstration of the patterned surface -
Water collection processes of diverse samples - Various critical parameters about water collection capability of diverse specimens - Designed origin of patterned surface and mechanisms of water collection behaviors for diverse specimens - Mechanical durability and chemical stability of superamphiphobic surfaces - Acid fog, alkali fog, and hot water collection processes by the patterned surfaces
- Table 1 : Summary of CAs and SAs of various samples |
| DOI : |
https://doi.org/10.1007/s11998-023-00796-1 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-023-00796-1.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40178 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 6 (11/2023) . - p. 2019-2029
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Robust patterned superoleophobic platform for efficient water harvesting in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)
