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A facile approach for oil-water separation using superhydrophobic polystyrene-silica coated stainless steel mesh bucket
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Researchers fabricated a superhydrophobic stainless steel mesh bucket using polystyrene and silica nanoparticle coatings that achieved over 99% oil-water separation efficiency, and demonstrated it could simultaneously lift microplastic pollutants from water surfaces while withstanding repeated mechanical, thermal, and chemical stress.
Inspired by traditional shaduf technology in the irrigation field, we fabricated a superhydrophobic stainless steel mesh bucket by layering polystyrene and SiO nanoparticles through a facile dip coating technique for effective oil-water separation. The superhydrophobic steel mesh bucket could effectively lift oil as well as microplastic pollutants from the water surface. The water contact angle of a two-layered polystyrene-silica coating was 158.5° ± 2°, while the oil contact angle was nearly 0°. The oil-water separation performance of superhydrophobic mesh was tested using several kinds of oil. The separation efficiency achieved for low viscous oil was 99.33 %, while 86.66 % efficiency was recorded for high viscous oil. The superhydrophobic mesh showed high durability against mechanical tests including bending, folding, twisting, adhesive tape tearing (25 cycles), and sandpaper abrasion (20 cycles). The mesh presented admirable thermal and chemical durability. The present superhydrophobic steel mesh bucket is a suitable candidate for large-scale application.
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Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.