Abstract:
:Liquid repellent surfaces typically work by keeping the fouling liquid in a metastable state, with trapped pockets of air between the substrate and the liquid. An alternative method with greater long-term stability utilizes liquid-impregnated surfaces, where the liquid being repelled slides over an immiscible liquid immobilized on a porous surface. Here, we report a method for creating honeycomb surfaces amenable to liquid-impregnation. Polystyrene dissolved in a water-immiscible, volatile solvent was deposited in a humid environment on a variety of substrates to achieve the necessary porosity. Evaporative cooling results in condensation of water in a breath figure array of droplets, forming a sacrificial template for the drying polymer film. These honeycomb surfaces were further functionalized with fluorosilane and dipped in the lubricating liquid to result in a durable, liquid-repellent surface. These surfaces were found to exhibit repellency towards water and oils with extremely low tilt angles due to the smooth liquid-liquid contact between the lubricating liquid and the liquid being repelled.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Brown PS,Bhushan Bdoi
10.1038/s41598-017-06621-1subject
Has Abstractpub_date
2017-07-20 00:00:00pages
6083issue
1issn
2045-2322pii
10.1038/s41598-017-06621-1journal_volume
7pub_type
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