Durable tetra-scale superhydrophobic coatings with virus-like nanoparticles for oil–water separations
- Authors
- Phan, N.M.[Phan, N.M.]; Kim, J.-H.[Kim, J.-H.]; Kim, J.[Kim, J.]; Weon, B.M.[Weon, B.M.]; Yi, G.-R.[Yi, G.-R.]
- Issue Date
- Dec-2021
- Publisher
- Elsevier B.V.
- Keywords
- Membrane; Oil absorption; Superhydrophobic coating; Virus-like silica nanoparticles; Water–oil separation
- Citation
- Applied Surface Science, v.570
- Indexed
- SCIE
SCOPUS
- Journal Title
- Applied Surface Science
- Volume
- 570
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/90309
- DOI
- 10.1016/j.apsusc.2021.151088
- ISSN
- 0169-4332
- Abstract
- For highly efficient water–oil separation, superhydrophobic surfaces were prepared by coating the virus-like silica nanoparticles (VLSNs) on a substrate in scalable manner and subsequent fluoroalkyl silane through the sol–gel process. On the VLSN-coated glass substrate, the contact angle of the water droplet increased from 100.8° (plain silica nanoparticles) to 178.9° in the air as the areal density of coated nanoparticles increased up to 8,170 nanoparticles per µm2. Furthermore, fabric membrane and stainless-steel mesh were coated with VLSNs and subsequently functionalized with fluoroalkyl silane, which was utilized for continuous oil–water separation with a high separation efficiency (>99%), high flux (>2,000 L/m2⋅h) and high washing durability (>500 cycles). Additionally, these superhydrophobic fabrics were applied for removing oil contaminants on water by absorption within ten seconds. © 2021 Elsevier B.V.
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- Appears in
Collections - Engineering > School of Advanced Materials Science and Engineering > 1. Journal Articles
- Engineering > Chemical Engineering > 1. Journal Articles
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