Recent Progress in the Fabrication and Characteristics of Self‐Repairing Superhydrophobic Surfaces

Liu, Fatang; Du, Hongzhong; Han, Ying; Wang, Chijia; Liu, Zhanjian; Wang, Huaiyuan

doi:10.1002/admi.202100228

Cited by 24 publications

(9 citation statements)

References 108 publications

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“…Superhydrophobic surface refers to the surface where the contact angle between water droplets and solid materials is greater than 150°, and the rolling angle is less than 10° when solid materials are in contact with water droplets. − Superhydrophobic surfaces are widely used in industry, military, and daily life because of their excellent hydrophobicity. − An important application of superhydrophobic surfaces is self-cleaning, which can effectively improve the waterproof and antifouling ability of its surface when it is used on glass, clothing, and metal. Superhydrophobic materials can also be used in pipeline antiscaling, oil–water separation, drag reduction, antiskid, anticorrosion, and other applications.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a Superhydrophobic Surface by a One-Step Powder Pressing Method with Liquid Silicone Rubber As the Carrier

et al. 2023

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The preparation methods of the superhydrophobic surface play an important role in its application, but most of the existing preparation methods are complicated in operation, high in cost, and polluting to the environment. In order to find a simple, rapid, lowcost, and nonenvironmentally polluting preparation method of the superhydrophobic surface, this paper used liquid silicone rubber as the carrier. Before the liquid silicone rubber was nearly cured, it was evenly covered with a layer of silicon dioxide powder, and then 5 N weight was used to compact the powder on the rubber surface, so that the superhydrophobic surface was quickly formed on its surface. The wettability, bouncing performance, self-cleaning performance, and bending durability of liquid silicone rubber before and after treatment were compared. The results show that the static contact angle and rolling angle of the liquid silicone rubber after powder pressing were 158.22 ± 2.01°and 1.00 ± 0.50°, respectively. Moreover, the superhydrophobic surface formed by the powder pressing method had good self-cleaning performance, high temperature resistance, bending resistance, and excellent droplet bounce performance. The strategy of preparing a superhydrophobic surface by a one-step powder pressing method may be applied to the preparation of the superhydrophobic surface on a large scale.

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Section: Introductionmentioning

confidence: 99%

Preparation of a Superhydrophobic Surface by a One-Step Powder Pressing Method with Liquid Silicone Rubber As the Carrier

et al. 2023

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“…However, there is almost no systematic research on the number of self-repairs in service, which determines the durability of SLIPS in practical application. [25] This research aims to study the self-repairing performance of SLIPS through icing-repairing and abrasion-repairing cycles, so as to explore its long-term application in the field of aircraft anti-icing. SLIPS was fabricated by infusing silicone oil into porous surface of substrate, as illustrated in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Self‐Repairing Performance of Slippery Liquid Infused Porous Surfaces for Durable Anti‐Icing

Yuan

Xiang

Liu

et al. 2022

Adv Materials Inter

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Anti-icing fluids with a low freezing point, such as ethylene glycol, are widely used for aircraft. [9] The fluid is evenly sprayed on the aircraft surface, thereby reducing the freezing point of water droplets and delaying icing. However, the anti-icing fluid needs to be applied repeatedly and requires many raw materials. Consequently, the deposition and dissipation of ethylene glycol aqueous solutions has caused serious pollution to the soil and groundwater environment. [10] Recently, superhydrophobic surfaces (SHP) have attracted much attention in the field of anti-icing. [11] The SHP can trap air within the micro/nanosurface and barrier the heat transfer, [12] thus showing a Cassie state. Such surfaces can repel water drops and delay the ice nucleation, which endows them excellent anti-icing properties. However, SHP is currently unable to meet the anti-icing requirements of aircraft surfaces well. On one hand, the aircraft must pass through clouds with high water vapor content during flight, and the water can condense on the textured structure of SHP, resulting in a Wenzel state. [13] On the other hand, the supercooled water droplets will impact onto the surface of the aircraft running at high speed. Thus, the water droplets can penetrate into the textured structure of SHP, which can also lead to a Wenzel state. [14] In the Wenzel state, the ice forms an interlock with the textured surface, consequently resulting in a higher ice-adhesion strength of SHP. [15] As a result, the SHP does not mean icephobicity, especially for the in-flight icing scenario.Inspired by nepenthes, Aizenberg et al. prepared a slippery liquid infused porous surface (SLIPS), also known as an ultralubricating surface. [16] SLIPS can be created by infiltrating a porous substrate with lubricant to produce an ultra-smooth lubricant layer and this layer on the surface can suppress the anchor of ice into the solid surface. Thus, the SLIPS demonstrates low ice-adhesion [17] and low nucleation rate. [18] Silicone oil (viscosity: 50 mPa s at 25 °C, surface tension: 21.2 mN m -1 at 25 °C, density: 0.964 g cm -1 at 25 °C, vapor pressure: <7 hPa at 25 °C) is often used as the lubricant, because it is difficult to volatile, non-toxic, harmless and low price. Anodic oxidation with simplicity and efficiency is generally used for the construction of the porous surfaces of light metal materials, [19] which can be also used for preparing SLIPS. To sum up, SLIPS is an economical, convenient, low-power requirement and environmentally friendly passive anti-icing method. Additionally, the Icing accretion on aircraft surfaces has threatened the flight safety so far. Slippery liquid infused porous surface (SLIPS) is an emerging anti-icing method. Many studies have found that SLIPS has self-repairing phenomena. However, there is almost no systematic research on the number of selfrepairs in service, which determines the durability of anti-icing. Herein, the self-repairing performance of SLIPS is studied through icing-repairing and abrasion-repairing cycles. A st...

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“…Recent research aimed at reconstructing surface morphologies of superhydrophobic materials/surfaces has unsurprisingly focused on the effects of shape memory polymers. − In most cases, superhydrophobicity can be regenerated by restoring surface micro/nanostructures that have been deformed by compression. Until now, to the best of our knowledge, as well as according to the latest review papers, − effective self-healing systems, which can restore surface morphologies after the surface microstructures have been completely crushed/abraded − or repair scratches/cuts over tens of micrometer, have not yet been reported. Although our “syneresis”-driven self-healing system using ODS is promising, the healing ability becomes worse and ultimately fails within a few days after sample preparation because of its extremely high chemical reactivity with moisture/water.…”

Section: Introductionmentioning

confidence: 99%

Long-Lasting Self-Healing Surface Dewettability through the Rapid Regeneration of Surface Morphologies

2022

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The development of self-healing systems for artificial superhydrophobic materials/surfaces based on the reconstruction of surface topologies rather than chemical makeup has been much less established. In this article, we report for the first time a simple and straightforward method for self-repairing surface dewettability over a long period of time by rapidly regenerating surface microstructures. We selected paraffin wax as a matrix for methyltrichlorosilane (MTCS) having strong reactivity with moisture/water and simply mixed them. When the as-prepared MTCS-loaded paraffin wax surfaces were exposed to air for a few hours, they spontaneously became highly hydrophobic with water contact angles of about 150°due to the formation of disordered surface microstructures. The use of paraffin wax with a few angstrom-scale space as a matrix was found to be more effective than the use of poly(dimethylsiloxane) with nanometer-size porosity in preventing both evaporation and degradation of MTCS's chemical reactivity for a long period. Therefore, for about 1 month, even after the surface microstructures were completely destroyed, surface dewettability could be self-repaired by rapidly regenerating surface morphologies. In addition, chemical damage by UV/ozone exposure could also be repeatably self-healed by the reconstruction of surface chemical makeup. We thus expect that this simple approach could provide future insights to impart the selfhealing ability of manmade superhydrophobic materials/surfaces against chemical and physical damages.

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Recent Progress in the Fabrication and Characteristics of Self‐Repairing Superhydrophobic Surfaces

Cited by 24 publications

References 108 publications

Preparation of a Superhydrophobic Surface by a One-Step Powder Pressing Method with Liquid Silicone Rubber As the Carrier

Preparation of a Superhydrophobic Surface by a One-Step Powder Pressing Method with Liquid Silicone Rubber As the Carrier

Self‐Repairing Performance of Slippery Liquid Infused Porous Surfaces for Durable Anti‐Icing

Long-Lasting Self-Healing Surface Dewettability through the Rapid Regeneration of Surface Morphologies

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