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Filefish-Inspired Surface Design for Anisotropic Underwater Oleophobicity

机译：Filefish启发的各向异性水下疏油性表面设计

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摘要

Surfaces with anisotropic wettability, widely found in nature, have inspired the development of one-dimensional water control on surfaces relying on the well-arranged surface features. Controlling the wetting behavior of organic liquids, especially the motion of oil fluid on surfaces, is of great importance for a broad range of applications including oil transportation, oil-repellent coatings, and water/oil separation. However, anisotropic oil-wetting surfaces remain unexplored. Here, the unique skin of a filefish Navodon septentrionalis shows anisotropic oleophobicity under water. On the rough skin of N. septentrionalis, oil droplets tend to roll off in a head-to-tail direction, but pin in the opposite direction. This pronounced wetting anisotropy results from the oriented hook-like spines arrayed on the fish skin. It inspires further exploration of the artificial anisotropic underwater oleophobic surfaces: By mimicking the oriented hook-like microstructure on a polydimethylsiloxane layer via soft lithography and subsequent oxygen-plasma treatment to make the PDMS hydrophilic, artificial fish skin is fabricated which has similar anisotropic underwater oleophobicity. Drawn from the processing of artificial fish skin, a simple principle is proposed to achieve anisotropic underwater oleophobicity by adjusting the hydrophilicity of surface composition and the anisotropic microtextures. This principle can guide the simple mass manufacturing of various inexpensive high surface-energy materials, and the principle is demonstrated on commercial cloth corduroy. This study will profit broad applications involving low-energy, low-expense oil transportation, underwater oil collection, and oil-repellant coatings on ship hulls and oil pipelines.
机译：在自然界中广泛发现的具有各向异性润湿性的表面启发了依赖于排列合理的表面特征的一维水控制技术的发展。控制有机液体的润湿行为，特别是控制油液在表面上的运动，对于包括输油，拒油涂层和水/油分离在内的广泛应用非常重要。但是，各向异性的油润湿表面仍未开发。在这里，斑节鱼Navodon septentrionalis的独特皮肤在水下表现出各向异性的疏油性。在分离的N. septentrionalis的粗糙皮肤上，油滴倾向于从头到尾的方向滚落，但朝相反的方向钉住。这种明显的润湿各向异性是由排列在鱼皮上的定向钩状棘刺引起的。它激发了对人造各向异性水下疏油表面的进一步探索：通过软光刻模拟聚二甲基硅氧烷层上定向的钩状微观结构，然后进行氧等离子体处理以使PDMS亲水，从而制造出具有类似各向异性水下疏油性的人造鱼皮。提出了一种从人造鱼皮加工中提取的简单原理，即通过调节表面成分和各向异性微观结构的亲水性来实现各向异性的水下疏油性。该原理可以指导各种廉价的高表面能材料的简单批量生产，并且该原理已在商用布灯芯绒上得到证明。这项研究将使广泛的应用受益，其中包括低能耗，低费用的石油运输，水下集油以及船体和输油管道上的防油涂层。

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  • 来源
    《Advanced Functional Materials》 |2014年第6期|809-816|共8页
  • 作者

    Yue Cai; Ling Lin; Zhongxin Xue; Mingjie Liu; Shutao Wang; Lei Jiang;

  • 作者单位

    Beijing National Laboratory for Molecular Sciences (BNLMS) Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190, PR China,Graduate School of Chinese Academy of Sciences Beijing, 100049, PR China;

    Beijing National Laboratory for Molecular Sciences (BNLMS) Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190, PR China,Graduate School of Chinese Academy of Sciences Beijing, 100049, PR China,The Third Institute of Oceanography of the State Oceanic Administration Xiamen, 361005, China;

    Beijing National Laboratory for Molecular Sciences (BNLMS) Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190, PR China,Graduate School of Chinese Academy of Sciences Beijing, 100049, PR China;

    Beijing National Laboratory for Molecular Sciences (BNLMS) Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190, PR China,Graduate School of Chinese Academy of Sciences Beijing, 100049, PR China;

    Beijing National Laboratory for Molecular Sciences (BNLMS) Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190, PR China;

    Beijing National Laboratory for Molecular Sciences (BNLMS) Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190, PR China,School of Chemistry and Environment Beihang University Beijing, 100191, PR China;

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