Hydrophilic directional slippery rough surfaces for water harvesting

Abstract

A hydrophilic directional slippery rough surface outperforms conventional liquid-repellent surfaces in water harvesting.

Emerging Applications of Bioinspired Slippery Surfaces in Biomedical Fields

“…[17] More recently,t he same group reportedaso-called hydrophilic slippery surfaceb yu sing hydroxyl-terminated silicone oil as infusing lubricant on nanotextured silicon wafer. [18] Varanasie tal. examined the sliding hydrodynamics when droplets of immiscible liquidsm ove along al ubricant-impregnated silicon micropost array,a nd revealed the criteria of the formation of wrapping layer on the sliding droplets.…”

“…observed a so‐called slippery Wenzel on silicon micropillar arrays with hierarchical nanoscale roughness . More recently, the same group reported a so‐called hydrophilic slippery surface by using hydroxyl‐terminated silicone oil as infusing lubricant on nanotextured silicon wafer . Varanasi et al.…”

Guided droplet transport on synthetic slippery surfaces inspired by a pitcher plant

“…Identifying new mechanisms for harnessing the directional mobility of droplets will inform the design of synthetic surfaces that transport droplets in a controlled way. Such mechanisms could be applied directly to droplet-based technologies such as rainwater harvesting [15] and anti-fogging coatings [16], as well as to rapidly expanding new technologies such as Micro-Electro-Mechanical Systems (MEMS) [17] and digital microfluidic devices [18]. Examining functional natural surfaces in vivo may also offer insights into the evolution of natural systems [19].…”

Three‐Dimensionally Programmed Slippery Wrinkles with High Stretchability for Tunable Functionality of Icephobicity and Effective Water Harvesting

“…Combining two approaches have been studied by fabricating 3D slippery materials based on hard and soft substrates. Specifically, realizing slippery properties on anisotropically structured hard surfaces, such as Si and Al, has been successfully demonstrated for enhanced dropwise condensation, and effective fog harvesting . On the other hand, the textured slippery soft surfaces have attracted much attention due to their favorable mechanical properties for low ice adhesion, easy deformation of substrates for facile droplet manipulation, and transformable features for effective water harvesting .…”

“…Further enhancement of water harvesting capabilities can be realized by optimizing the dimensions of surface structures. For example, the higher heights of microscale structures are preferred to improve water harvesting properties under the same periods of the structures …”