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首页> 外文期刊>Bioinspiration & biomimetics >Bioinspired nanoparticle spray-coating for superhydrophobic flexible materials with oil/water separation capabilities
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Bioinspired nanoparticle spray-coating for superhydrophobic flexible materials with oil/water separation capabilities

机译：Bioinspired纳米颗粒喷涂用于超疏水柔性材料，具有油/水分离能力

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摘要

Much of the inspiration for the creation of superhydrophobic surfaces has come from nature, from plants such as the sacred lotus (Nelumbo nucifera), where the micro-scale papillae epidermal cells on the surfaces of the leaves are covered with nano-scale epicuticular wax crystalloids. The combination of the surface roughness and the hydrophobic wax coating produces a superhydrophobic wetting state on the leaves, allowing them to self-clean and easily shed water. Here, a simple scaled-up carbon nanoparticle spray coating is presented that mimics the surface of sacred lotus leaves and can be applied to a wide variety of materials, complex structures, and flexible substrates, rendering them superhydrophobic, with contact angles above 160 degrees. The sprayable mixture is produced by combining toluene, polydimethylsiloxane, and inherently hydrophobic rapeseed soot. The ability to spray the superhydrophobic coating allows for the hydrophobisation of complex structures such as metallic meshes, which allows for the production of flexible porous superhydrophobic materials that, when formed into U-shaped channels, can be used to direct flows. The porous meshes, whilst being superhydrophobic, are also oleophilic. Being both superhydrophobic and oleophilic allows oil to pass through the mesh, whilst water remains on the surface. The meshes were tested for their ability to separate mixtures of oil and water in flow conditions. When silicone oil/water mixtures were passed over the meshes, all meshes tested were capable of separating more than 93% of the oil from the mixture.
机译：从诸如神圣莲花（Nelumbo Nucifera）的植物中，植物的大部分灵感来自于植物，其中叶片表面上的微级乳头表皮细胞被纳米级外形蜡晶体覆盖。表面粗糙度和疏水性蜡涂层的组合在叶子上产生超疏水润湿状态，使它们允许它们自干净且容易脱落。这里，提出了一种简单的缩放碳纳米粒子喷涂涂层，其模仿神圣莲花的表面，并且可以应用于各种材料，复杂的结构和柔性基板，使其超细杂志，其接触角以上160度以上。通过组合甲苯，聚二甲基硅氧烷和固有的疏水油菜籽烟灰制备可喷雾的混合物。喷涂超疏水涂层的能力允许诸如金属网的复杂结构的疏水化，这允许制备柔性多孔超疏水材料，当形成为U形通道时，可以用于引导流动。多孔网格，而超疏水性，也是疏油性的。两种超疏水和油脂允许油可以通过网状物，而水仍然在表面上。测试网孔的能力将油和水中的混合物分离在流动条件下。当硅油/水混合物通过网状物时，所有测试的网格都能够将大于93％的油与混合物分离。

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