A facile process for fabrication of environmentally safe superhydrophobic surfaces / Tanu Mittal in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 6 (11/2017)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 6 (11/2017) . - p. 1289-1295 Titre : A facile process for fabrication of environmentally safe superhydrophobic surfaces Type de document : texte imprimé Auteurs : Tanu Mittal, Auteur ; Sangeeta Tiwari, Auteur ; S. K. Tiwari, Auteur Année de publication : 2017 Article en page(s) : p. 1289-1295 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dioxyde de silicium Dip-coating Fluoropolymères Hydrophobie Revêtement auto-nettoyant Revêtements multicouches Sol-gel, Procédé Verre -- Revêtements Index. décimale : 667.9 Revêtements et enduits Résumé : Superhydrophobic coatings have opened new vistas in the field of self-cleaning surfaces by having improved performance, robustness and preservation of cleaning agents including water. Presently, fluoropolymers are extensively explored and used for this purpose. However, the major drawback accompanying fluoropolymers is formation of environmentally persistent and toxic compounds, viz. PFOA (perfluorooctanoic acid) and PFOS (perfluorooctanesulfonic acid) on their degradation raising concern on their use. In the present study, an effort has been made to develop a facile process by using an environmentally safe material. A simple dip coating technique is reported to fabricate superhydrophobic surface. SiO2 nanoparticles of size 25–30 nm, prepared by sol–gel route, were dip-coated on glass substrate in multilayers followed by coating of a surfactant to achieve homogeneity of SiO2 layers and enhanced binding with subsequent layer of NUVA-2114 [a commercially used fluorotelomer with chemical composition C2F6(CF2CF2)nX]. It was observed that SiO2 nanoparticles and sodium dodecyl sulfate (SDS) surfactant exhibit a synergistic effect on interface stability at optimized SDS concentration. A water contact angle of 152° is achieved. The established method is simple, scalable, environmentally safe and cost-effective. Note de contenu : - EXPERIMENTAL : Materials - Preparation of SiO2 NPs by sol–gel route - Deposition of SiO2 NPs on glass substrate - Deposition of SDS and NUVA 2114 layers over SiO2 NPs - Characterization - RESULTS AND DISCUSSION : Particle size and morphology of SiO2 NPs - SiO2 NPs deposition on glass substrate - Role of SDS in stabilization of interfaces between various layers - CONTACT ANGLE AND AFM ANALYSIS - OPTICAL CHARACTERIZATION DOI : 10.1007/s11998-017-9927-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9927-4.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29629 [article]

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