Thermo‐Regeneration of Plastrons on Superhydrophobic Coatings for Sustained Antifouling Properties,Advanced Engineering Materials

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Thermo‐Regeneration of Plastrons on Superhydrophobic Coatings for Sustained Antifouling Properties
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2020-03-01 , DOI: 10.1002/adem.201900806
Tomer Simovich ₁ , Axel Rosenhahn ₁ , Robert N. Lamb ₂

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A popular and desirable function of superhydrophobic coatings is their remarkable ability to retain an entrapped layer of air, called a plastron, when submerged underwater. The drawback is that the air layer is short-lived due to solvation into the surrounding liquid. While manipulating the solubility of gases using temperature is a possible approach, it generally requires inefficiently heating large volumes of water. Following the demonstrated ability to maintain air bubbles on superhydrophobic surfaces for drag reduction, this article introduces a novel method of extracting gas from water to replenish and stabilize the plastron on superhydrophobic surfaces for sustained antifouling abilities. This method involves locally heating the liquid surrounding a superhydrophobic coating, reducing gas solubility, and causing the gas to nucleate at the liquid–air interface. The approach requires a relatively low energy input, due to the small volume of locally heated water. With a constant supply of equilibrated water and minimal energy input, the plastron can survive indefinitely without the need for a mechanical delivery of air. The thermoregenerating superhydrophobic samples were shown to exhibit excellent antifouling behavior and inhibited diatom attachment over a period of 5 days.

中文翻译：

用于持续防污性能的超疏水涂层上腹板的热再生

超疏水涂层的一个受欢迎且令人向往的功能是它们在浸入水下时能够保留被夹带的空气层，称为腹甲。缺点是空气层由于溶解到周围液体中而寿命很短。虽然使用温度控制气体的溶解度是一种可能的方法，但它通常需要对大量水进行低效加热。继已证明在超疏水表面上保持气泡以减少阻力的能力之后，本文介绍了一种从水中提取气体以补充和稳定超疏水表面上的腹甲以实现持续防污能力的新方法。这种方法包括局部加热超疏水涂层周围的液体，降低气体溶解度，并使气体在液-气界面处成核。由于局部加热水的体积小，该方法需要相对较低的能量输入。通过持续供应平衡水和最少的能量输入，腹甲可以无限期地存活，而无需机械输送空气。热再生超疏水样品显示出优异的防污性能，并在 5 天内抑制了硅藻附着。

更新日期：2020-03-01

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