Slipperiness and stability of hydrophilic surfaces coated with a lubricating fluid

Pant, Neeraj; Roy, Pritam Kumar; Nagarajan, Anantha Venkataraman; Khare, Krishnacharya

doi:10.1039/c5ra23140j

Cited by 25 publications

(19 citation statements)

References 35 publications

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“…The mechanism of the covalent bonding of silicone oil molecules with the glass substrate due to annealing is schematically shown in Fig. 1a, which is also demonstrated by Pant et al 29 Hence, this would make the substrate hydrophobic with excellent slipperiness. The water droplets on the fabricated slippery surface sliding with a very small tilt angle suggests that a small gravitational force was enough to overcome the pinning force of the slippery surface.…”

Section: Resultsmentioning

confidence: 63%

Facile silicone oil-coated hydrophobic surface for surface enhanced Raman spectroscopy of antibiotics

Usman

Guo

et al. 2019

RSC Adv.

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Section: Resultsmentioning

confidence: 63%

Facile silicone oil-coated hydrophobic surface for surface enhanced Raman spectroscopy of antibiotics

Usman

Guo

et al. 2019

RSC Adv.

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“…Static water drops deposited on silicone oil coated solid surfaces are cloaked with a thin layer of oil due to positive spreading coefficient of oil on water. Spreading parameter ( , subscript O , W and V represent oil, water and vapour respectively) for our system is 8.5 mN/m 72 . Once these oil cloaked water drops slip from the lubricant coated surface, they slowly remove oil from the surface thus decrease the lubricating layer thickness which affect the velocity of slipping water drop.…”

Section: Resultsmentioning

confidence: 99%

Uniting Superhydrophobic, Superoleophobic and Lubricant Infused Slippery Behavior on Copper Oxide Nano-structured Substrates

Ujjain

Roy

Kumar

et al. 2016

Sci Rep

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Alloys, specifically steel, are considered as the workhorse of our society and are inimitable engineering materials in the field of infrastructure, industry and possesses significant applications in our daily life. However, creating a robust synthetic metallic surface that repels various liquids has remained extremely challenging. The wettability of a solid surface is known to be governed by its geometric nano-/micro structure and the chemical composition. Here, we are demonstrating a facile and economical way to generate copper oxide micro-nano structures with spherical (0D), needle (1D) and hierarchical cauliflower (3D) morphologies on galvanized steel substrates using a simple chemical bath deposition method. These nano/micro textured steel surfaces, on subsequent coating of a low surface energy material display excellent superhydrophobic, superoleophobic and slippery behavior. Polydimethylsiloxane coated textured surfaces illustrate superhydrophobicity with water contact angle about 160°(2) and critical sliding angle ~2°. When functionalized with low-surface energy perfluoroalkylsilane, these surfaces display high repellency for low surface tension oils as well as hydrocarbons. Among them, the hierarchical cauliflower morphology exhibits re-entrant structure thereby showing the best superoleophobicity with contact angle 149° for dodecane. Once infused with a lubricant like silicone oil, they show excellent slippery behavior with low contact angle hysteresis (~ 2°) for water drops.

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“…The special liquid delivery method at the mouth of Nepenthes has important reference significance for the development and design of a new directional flow delivery system, and it has a wide application prospect in the field of fog water collection and transportation [161][162][163] . However, the effect of the surface wettability and structural parameters of Nepenthes is not clear.…”

Section: Nepenthes Bionicsmentioning

confidence: 99%

Bio-inspired Fog Harvesting Materials: Basic Research and Bionic Potential Applications

2021

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With the explosive growth of the world’s population and the rapid increase in industrial water consumption, the world’s water supply has fallen into crisis. The shortage of fresh water resources has become a global problem, especially in arid regions. In nature, many organisms can collect water from foggy water under harsh conditions, which provides us with inspiration for the development of new functional fog harvesting materials. A large number of bionic special wettable synthetic surfaces are synthesized for water mist collection. In this review, we introduce some water collection phenomena in nature, outline the basic theories of biological water harvesting, and summarize six mechanisms of biological water collection: increased surface wettability, increased water transmission area, long-distance water delivery, water accumulation and storage, condensation promotion, and gravity-driven. Then, the water collection mechanisms of three typical organisms and their synthesis are discussed. And their function, water collection efficiency, new developments in their biomimetic materials are narrated, which are cactus, spider and desert beetles. The study of multiple bionics was inspired by the discovery of Nepenthes’ moist and smooth peristome. The excellent characteristics of a variety of biological water collection structures, combined with each other, are far superior to other single synthetic surfaces. Furthermore, the main problems in the preparation and application of biomimetic fog harvesting materials and the future development trend of materials fog harvesting are prospected.

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Slipperiness and stability of hydrophilic surfaces coated with a lubricating fluid

Abstract: Stable slippery lubricating-fluid-coated surfaces on smooth hydrophilic silicon surfaces.

Cited by 25 publications

References 35 publications

Facile silicone oil-coated hydrophobic surface for surface enhanced Raman spectroscopy of antibiotics

Facile silicone oil-coated hydrophobic surface for surface enhanced Raman spectroscopy of antibiotics

Uniting Superhydrophobic, Superoleophobic and Lubricant Infused Slippery Behavior on Copper Oxide Nano-structured Substrates

Bio-inspired Fog Harvesting Materials: Basic Research and Bionic Potential Applications

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