Bio-inspired fabrication of superhydrophilic and underwater superoleophobic alumina membranes for highly efficient oil/water separation / Wenjin Zhou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 2 (03/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 2 (03/2021) . - p. 361-372 Titre : Bio-inspired fabrication of superhydrophilic and underwater superoleophobic alumina membranes for highly efficient oil/water separation Type de document : texte imprimé Auteurs : Wenjin Zhou, Auteur ; Mingyang Zhou, Auteur ; Huapeng Zhang, Auteur ; Hongyan Tang, Auteur Année de publication : 2021 Article en page(s) : p. 361-372 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alumine Caractérisation Essais (technologie) Essais de résilience Hydrophilie Matériaux -- Propriétés antisalissures Membranes (technologie) Mouillabilité Oléophobie Polyéther imide Séparation huile/eau Index. décimale : 667.9 Revêtements et enduits Résumé : Inspired by fish scales, superhydrophilic and underwater superoleophobic alumina membranes were fabricated in this study. Dopamine deposited on the surface of alumina membranes through immersion over time, and then crosslinking reaction occurred with polyethyleneimine (PEI), which was confirmed by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. It induced the modified layer coated on the membrane surface. Values of water contact angle of the modified alumina membranes were ~ 0° in air. Values of underwater oil contact angle reached 155°, which indicated it was superhydrophilic and underwater superoleophobic. More particles engendered with the increase in the reaction time with PEI, which induced the decrease in the pore sizes and permeation flux. All values of oil rejection were higher than 98.5%. No obvious deterioration of permeation flux could be found. The rejection hardly suffered a sharp decline over 800 min. It indicates that the modified layer can firmly stick to the alumina membranes. Therefore, the as-prepared alumina membrane is promising for practical oil/water separation. Note de contenu : - MATERIALS AND METHODS : Materials and chemicals - Modification of alumina membranes - Characterization and measurement - Abrasion experiment - Separation experiments - RESULTS AND DISCUSSION : Surface morphology of the membranes - Chemical composition on the surface - Surface wettability - Separation performance - Antifouling property of the modified membranes - Table 1 : The modification parameters of the asprepared alumina membranes DOI : https://doi.org/10.1007/s11998-020-00406-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00406-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35600 [article]

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