An Extreme‐Environment‐Resistant Self‐Healing Anti‐Icing Coating

Abstract

Traditional anti-icing strategies, including mechanical, electrothermal, and chemical deicing, are commonly used on outdoor infrastructures and transportations. [7] However, these methods are inefficient, energy-consuming, and/or unfriendly to the environment. [8] More efficient and environment-friendly antiicing coatings can inhibit ice nucleation and decrease ice adhesion without human intervention, having attracted more attention in recent years. [9] Up to date, there have been many types of advanced antiicing coatings including superhydrophobic surfaces, [10,11] slippery liquid-infused porous surfaces, [12,13] and other ice-phobic surfaces. [14][15][16] They have presented high efficiency to prevent icing based on different mechanisms. However, artificial surface-based coatings are commonly difficult to work well in outdoor environments, especially in extreme weather events (such as freezing weather or acid rain). Once mechanical damage induced by surroundings or icing/deicing cycles on coating surface, ice nucleation and ice-substrate interlocking would be evoked, resulting in icing promotion and stronger ice adhesion. Therefore, it is highly desired to develop an anti-icing coating that possesses excellent durability in resistance to universal conditions.Inspired by biological tissues, self-healing materials can be employed to enhance durability in a variety of applications such as flexible electronics and energy storage devices. [17,18] Self-healing ability can repair potential defects to avoid frequent maintenance of devices and significantly prolong the service lifetime. It can thus be proposed that autonomously self-healing anti-icing coatings can effectively inhibit defect-induced icing and ensure coating durability. [19,20] However, there are few reports with respect to autonomously self-healing anti-icing under extreme conditions. The challenge is mainly owing to two aspects: 1) There is a tradeoff between anti-icing performance and self-healing property. Because self-healing commonly relies on dynamic bonding interactions (such as dynamic H-bonds) that can promote ice adhesion on the material surface. [21,22] 2) Underwater or in freezing conditions, the healing efficiency of materials would be significantly decreased because the dynamic bond reconnection would be inhibited by water molecules, and the mobility of polymer chains is decreased in low temperature to prevent healing. [23] Anti-icing coatings on outdoor infrastructures and transportations inevitably suffer from surface injuries, especially in extreme weather events (e.g., freezing weather or acid rain). The coating surface damage can result in anti-icing performance loss or even icing promotion. The development of anti-icing coatings that enables self-healing in extreme conditions is highly desired but still challenging. Herein, an extreme-environment-resistant selfhealing anti-icing coating is developed by integrating fluorinated graphene (FG) into a supramolecular polymeric matrix. The coating exhibits both antiicing and deicing performa...

Highly Efficient Photothermal Icephobic/de‐Icing MOF‐Based Micro and Nanostructured Surface

“…c) Comparison of icing delay time between our MOF‐M 250 NS and other recently reported ice‐delayed surfaces (Ref. [7, 22, 28, 31–40]). d,e) COMSOL simulations of a water droplet icing process on the surface of MOF‐M 250 NS d) and copper sheet e).…”

“…Furthermore, MOF-M 250 NS offers the longest icing delay time (Figure 3c) among the recently reported ice nuclear delayed surface. [7,22,28,[31][32][33][34][35][36][37][38][39][40] More interestingly, the water droplet on the MOF-M 250 NS surface maintains a spherical shape before and after icing. It indicates that the hierarchical MOF micro-nanostructures maintain the droplet in a stable Cassie state throughout the extended icing process.…”

Exploring the Self‐Cleaning Facets of Fluorinated Graphene Nanoarchitectonics: Progress and Perspectives

“…The design, processing formulations, and application of FG derived superhydrophobic materials with respect to environment friendly approach is very important exploration using eco‐friendly principles. For instance, self‐cleaning coatings and long‐lasting products, involving temperature resistant, lubricative and chemically stable properties, can have a widespread usage in desalination, electrical appliances, medical equipments, stable self‐healing/anti‐icing coatings, and smart textiles [151,152] . The next generation topics in FG derivatives and composites should focus on advanced sensing, flexible heat dissipation devices, secondary batteries, micro‐supercapacitors, and sea‐water desalination membranes [153–157] .…”

“…For instance, self-cleaning coatings and longlasting products, involving temperature resistant, lubricative and chemically stable properties, can have a widespread usage in desalination, electrical appliances, medical equipments, stable self-healing/anti-icing coatings, and smart textiles. [151,152] The next generation topics in FG derivatives and composites should focus on advanced sensing, flexible heat dissipation devices, secondary batteries, micro-supercapacitors, and seawater desalination membranes. [153][154][155][156][157] The hydrophobicity/hydrophilicity tuning of metal halide perovskites when supported over FG and other graphene derivatives having profound impact on the hole transport and optoelectronic properties which could be rationally designed in future.…”

Superhydrophobic Antifrosting 7075 Aluminum Alloy Surface with Stable Cassie–Baxter State Fabricated through Direct Laser Interference Lithography and Hydrothermal Treatment

“…Condensation frosting is a ubiquitous natural phenomenon that we encounter on a daily basis. However, frost formation and accumulation may lead to adverse impacts in many industrial situations, such as reducing the reliability of instruments, , increasing thermal resistance and blocking heat transfer in HVAC&R systems, − and causing destructive damage on powerlines. , Many efforts have been made to mitigate frosting. Conventional approaches, such as electrothermal systems, oscillations, and antifreezing chemical compounds, have been developed to alleviate frosting. , However, all of them are either extremely energy-intensive or chemically hazardous.…”