Organic carbon dot coating for superhydrophobic aluminum alloy surfaces / Huaqiao Peng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 3 (05/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 3 (05/2021) . - p. 861-869 Titre : Organic carbon dot coating for superhydrophobic aluminum alloy surfaces Type de document : texte imprimé Auteurs : Huaqiao Peng, Auteur ; Lin Li, Auteur ; Qiang Wang, Auteur ; Yabo Zhang, Auteur ; Tianming Wang, Auteur ; Baozhan Zheng, Auteur ; Hong Zhou, Auteur Année de publication : 2021 Article en page(s) : p. 861-869 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium -- Alliages Carbone Carbone organique Gravure Hydrophobie Morphologie (matériaux) Mouillabilité Revêtement auto-nettoyant Surfaces (Physique) Index. décimale : 667.9 Revêtements et enduits Résumé : A novel fluorine-free and silicon-free superhydrophobic aluminum alloy (treated-Al) is fabricated by chemical etching using hydrochloric acid and hydrogen peroxide and modified with an organic carbon dot (OCD) coating. The water contact angle (CA) of the treated-Al surface increases with the OCD concentration. When etched aluminum (etched-Al) is modified with 0.5 mg/ml OCDs, a CA of 161.4° is achieved, which indicates good nonwettability. SEM results verify that porous microstructures with cavities are uniformly distributed on the surface of etched-Al, in contrast to the bare aluminum alloy, which forms a primary rough structure. After treatment with 0.5 mg/ml OCDs, a nanoparticle coating is dispersed on the rough structures of treated-Al-0.5, which can trap air and make a water droplet essentially rest on a layer of air. The treated-Al-0.5 material has good self-cleaning properties and can sweep away contaminants at both 20 and 0°C. The Ecorr and Icorr of treated-Al-0.5 are − 0.56 V and 2.82 × 10−6 A/cm2, respectively, which shows good anticorrosion performance. Note de contenu : - EXPERIMENTAL SECTION : Materials - Preparation of OCDs - Preparation of superhydrophobic surfaces - Characterization of superhydrophobic surfaces - RESULTS AND DISCUSSION : Wettability of aluminum surface treated with OCDs - Surface morphology of aluminum surface treated with OCDs - Surface composition - Self-cleaning and anticorrosion applications DOI : https://doi.org/10.1007/s11998-020-00449-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00449-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35935 [article]

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