A Novel Icephobic Strategy: The Fabrication of Biomimetic Coupling Micropatterns of Superwetting Surface

Abstract

or easily delaminated afterward by natural airflows or gravity, which are low cost and environment-friendly. These surfaces are identified as icephobic or anti-icing surfaces. In the past few decades, intensive efforts have been made for the fabrication of suitable icephobic surfaces and to reveal the behavior and mechanism of ice formation. [7][8][9] Recently, superhydrophobic surfaces (SHSs), [10] inspired by lotus leaves [11] and water-strider legs, [12] have shown the potential icephobic property because of the high water contact angle and ultralow flow resistance. Guo et al. [13] have shown that a micro/nanostructured surface has a robust icephobic/ anti-icing property and can extremely delay the ice formation time to 7000 s. Meuler et al. [14] have studied the average strengths of ice adhesion on the discs with a range of liquid water wettability, and found that the average strength of ice adhesion was reduced on SHS than bare steel discs, because SHSs possess the small areas of contact interface with ice. In addition, superhydrophobic material textured with different hierarchical structure exhibits spectacular dynamical properties. At the small scale of dew, superhydrophobic nanotextured surfaces can expel micrometric droplets as they coalesce with their neighbor droplets, demonstrating great anti-fogging/icing abilities. [15][16][17][18][19] Boreyko et al. [20] have reported a surprising self-jumping motion of the coalesced drops driven by the release of surface energy. The autonomous removal of drops does not rely on any external forces, so that it has the potential to prevent ice accumulation. Moreover, Hou et al. [21] successfully fabricated a novel beetle mimetic surface with high wetting contrast, which could greatly improve the droplet nucleation density, growth rate, and self-removal, as well as overall heat transfer coefficient. As to the macroscopic droplet, water impacting process on superhydrophobic surface contains three periods: spreading, retracting and rebounding. Researches have proved that the impacting process is also affected by the presence of large defects: submillimeter ridges, [22] big conical posts [23] or large chemical defects [24] on a water-repellent material, which can reduce the contact time dramatically. Liu et al. [25] found that a drop impinging on Echeveria leaves exhibited asymmetric bouncing dynamics. And Bird et al. [26] designed macrotextures on the nonwetting surface to trigger a controlled asymmetry and nonuniform velocity field in the retracting film, theoretically and experimentally reducing the overall contact time. Besides, another strategy reported in recent researches This work proposes a biphilic icephobic surface by combining the top-down and bottom-up methods. It is found that the impacting droplet on biphilic surface is divided into several parts during the recoiling process, which can significantly reduce the drop contact time before freezing. The anti-icing test of the biphilic surface in the simulated environment also proves its excellent icephobic capa...

Superhydrophobic Surface with Stepwise Multilayered Micro- and Nanostructure and an Investigation of Its Corrosion Resistance

“…Inspired by the water repellency of lotus leaves in nature, the superhydrophobic phenomenon has always been a focus of interest among research communities. When a solid surface displays a water contact angle (WCA) of >150° and a water sliding angle (WSA) of <5°, such a surface is considered to be superhydrophobic. , It is generally believed that superhydrophobic surfaces have versatile applications such as anticorrosion, − anti-icing, − self-cleaning, − oil–water separation, − water harvesting, − directional transport of bubbles, water, and oil, − and superwettability transformation by external stimuli. − However, the practical applications of superhydrophobic surfaces are limited by shortcomings in poor mechanical robustness. , Besides, not all superhydrophobic surfaces are able to show excellent anticorrosion performance. − …”

Icephobic materials and strategies: From bio‐inspirations to smart systems

“…This unique characteristic can contribute to a quick shed‐off of nucleated water droplets by the wind or gravity. In addition, Li et al 133 . showed that water droplets spread asymmetrically before reaching their maximum diameters on biphilic surfaces, instead of being symmetrical spread on SHSs.…”

“…132 The ice failures may occur at different locations, such as in internal sites of the ice layer, in ice coatings, in substrate-coating interfaces, and in mixed states. The tensile stress should also be evaluated, 43,133,134 although just a few studies have earlier been reported. Typically, if the distance between two bodies is within the attraction zone of the Vander-Waals forces (≈0.5 nm), the adhesion of ice to the solid surface will be affected by the radius of the interacting area (R).…”

“…This unique characteristic can contribute to a quick shed-off of nucleated water droplets by the wind or gravity. In addition, Li et al 133 showed that water droplets spread asymmetrically before reaching their maximum diameters on biphilic surfaces, instead of being symmetrical spread on SHSs. In the recoiling process, the flattened droplet is torn into fragments because of the variation in surface tension (γ superhydrophilic > γ superhydrophobic ).…”

A Review on Superhydrophobic Surface with Anti-Icing Properties in Overhead Transmission Lines

“…Recently, Wang et al [127] studied the wetting behaviors of four well-designed micro-nano structured surfaces via ultrafast laser ablation (Figure 13), indicating the precise control of this technique. Li et al [50] studied the laser-ablating surface of 7075 Al alloys modified with silicon hydride and PDMS, and reported a low ice adhesion of about 60 kPa. Moreover, Lian et al [49] prepared the micro-textures of laser ablating Al surfaces modified with HDTMS and measured the durability under simulated environments of overhead conductors.…”