调整 SiO2 基纳米流体的润湿性能，以创建具有特殊润湿性的耐用表面，用于自清洁、防污和油水分离,Industrial & Engineering Chemistry Research

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调整 SiO2 基纳米流体的润湿性能，以创建具有特殊润湿性的耐用表面，用于自清洁、防污和油水分离
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-05-27 , DOI: 10.1021/acs.iecr.2c00934
Pouriya Esmaeilzadeh ₁ , Mohammad Hossein Ghazanfari ₁ , Asghar Molaei Dehkordi ₁

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具有特殊润湿性的表面因其在诸多领域的广泛应用而引起了广泛关注。_{在这项工作中，我们系统地报告了基于 SiO 2}等现成材料的纳米流体的选择性和各种制造。纳米粒子和聚二甲基硅氧烷以产生超疏水、超疏油、超亲水/超疏油和水下超疏油涂层。通过简单且具有成本效益的溶液浸入技术，在作为多孔基材的矿物岩石板上研究了制备涂层的效率。170°的静态水接触角、水滴的轻松弹跳以及固体表面几乎为零倾斜的自清洁特性是用聚二甲基硅氧烷改性的二氧化硅纳米流体处理的高性能超疏水表面的标志。超双疏纳米流体涂层赋予岩石表面非粘性特征，通过该特征，水和油滴可以在表面上自由移动，倾斜度可忽略不计，并且很容易被针尖分离而不会留下痕迹。更，超双疏表面提供出色的防污和自清洁性能，以及对各种油性液体的滑动角≤8°的便捷滚动性能。此外，所获得的超亲水/超疏油表面在空气和水下均表现出双重超疏油性。这些不同的涂层可用于不同的基材，显着扩大了应用范围。作为一个案例，我们在不锈钢网上使用了超亲水/超疏油涂层进行油水分离。各种油水混合物的分离效率均在 99% 以上，这证实了涂层具有优异的油屏蔽和亲水性能。所有上述优点，结合显着的化学和机械稳定性以及处理过的表面的耐高压-高温性，

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Tuning the Wetting Properties of SiO2-Based Nanofluids to Create Durable Surfaces with Special Wettability for Self-Cleaning, Anti-Fouling, and Oil–Water Separation

Surfaces with special wettability have aroused lots of attention due to their broad applications in many fields. In this work, we systematically report selective and various fabrications of nanofluids based on readily available materials such as SiO₂ nanoparticles and polydimethylsiloxane to create superhydrophobic, superoleophobic, superhydrophilic/superoleophobic, and underwater superoleophobic coatings. The efficiency of prepared coatings is investigated on mineral rock plates as porous substrates via the straightforward and cost-effective solution-immersion technique. The static water contact angle of 170°, effortless bouncing of water droplets, and self-cleaning property with a near zero tilt of the solid surface are signs of a high-performance superhydrophobic surface treated with the polydimethylsiloxane-modified silica nanofluid. The superamphiphobic nanofluid coating endows a non-adhesive feature to the rock surface by which the water and oil droplets can be freely moved on the surface with negligible tilt and are easily detached by a needle tip without leaving a trail. What is more, the superamphiphobic surface provides excellent anti-fouling and self-cleaning properties, along with convenient rolling-off behavior with sliding angles ≤8° for various oily liquids. Also, the obtained superhydrophilic/superoleophobic surface exhibits dual superoleophobicity both in air and underwater. These diverse coatings can be used on different substrates, which notably expand the scope of applications. As a case, we employed the superhydrophilic/superoleophobic coating on a stainless-steel mesh for oil–water separation. The separation efficiency of above 99% for various oil–water mixtures confirms the superior oil-shielding and water-affinity properties of the coating. All of the abovementioned advantages, combined with significant chemical and mechanical stability and high-pressure–high-temperature resistance of the treated surfaces, indicate that the prepared multifunctional coatings will hold great potential in a variety of practical and industrial applications.

更新日期：2022-05-27

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