| 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 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 6 (11/2017) . - p. 1289-1295
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A facile process for fabrication of environmentally safe superhydrophobic surfaces in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 6 (11/2017)
