‘Fish-scale’-mimicked stretchable and robust oil-wettability that performs in various practically relevant physically/chemically severe scenarios†,Journal of Materials Chemistry A

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‘Fish-scale’-mimicked stretchable and robust oil-wettability that performs in various practically relevant physically/chemically severe scenarios†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2018-05-04 00:00:00 , DOI: 10.1039/c8ta01799a
Dibyangana Parbat _{1,

2,

3} , Uttam Manna _{1,

2,

3}

Affiliation

Stretchable biomimicked special wettability—particularly ‘lotus-leaf’-inspired superhydrophobicity—has emerged as an important avenue for designing various smart and advanced materials. In this context, artificial fish-scale-inspired superoleophobicity—extreme oil-repellency under water—is another important and highly relevant special wettability with regards to its various prospective and relevant applications in practical scenarios. Highly water-compatible hierarchical topographic materials that confer extreme oil-repellency under water are commonly synthesized using polymeric soft hydrogel and brittle metal-oxide coatings that are generally fragile towards both applied tensile stress and chemically harsh aqueous exposures. Thus, designing of stretchable ‘fish-scale’-inspired artificial interfaces is highly challenging, and examples of such stretchable interfaces are rare in the literature. Herein, a highly stretchable (150% strain) and physically/chemically durable underwater superoleophobic interface was developed via simple and strategic integration of covalently cross-linked ‘reactive’ multilayers with a stretchable fibrous substrate. This as-synthesized interface with bio-mimicking wettability remained unaltered under various harsh physical and chemical conditions, including successive (1000 times) tensile deformations, different physical abrasion tests, prolonged exposure (30 days) to UV irradiation, exposures to high and low temperatures (100 °C and 10 °C) and severely complex aqueous phases. Thus, this approach provided a durable and highly stretchable oil-repellent interface that would be useful in various submarine-related and biomedical applications, including prevention of oil contamination, oil/water separations, and anti-bio fouling coating on flexible medically relevant substrates (e.g., catheter balloon). Furthermore, the as-synthesized material was successfully applied to the gravity-driven eco-friendly separation of oil/water mixtures under severe physical/chemical conditions (e.g., extreme conditions of temperatures, tensile strain, pH, sea water, and river water). This study provides a facile and robust strategy for various potential outdoor applications of this biomimicked special wettability.

中文翻译：

“鱼鳞”状可拉伸且坚固的油润湿性，可在各种实际相关的物理/化学严酷情况下发挥作用†

可拉伸的仿生生物特殊润湿性，尤其是受“荷叶”启发的超疏水性，已成为设计各种智能和高级材料的重要途径。在这种情况下，就其在实际场景中的各种前瞻性和相关应用而言，人工鱼鳞启发的超疏油性（在水下极高的拒油性）是另一个重要且高度相关的特殊润湿性。通常使用聚合物软水凝胶和易碎的金属氧化物涂层合成具有高度水相容性的层状地形材料，这些材料在水下具有极高的拒油性，而这种涂层通常对所施加的拉应力和化学苛刻的水暴露都很脆弱。因此，设计可拉伸的“鱼鳞”风格的人工界面非常具有挑战性，这样的可拉伸界面的例子在文献中很少见。在此，开发了高度可拉伸的（150％应变）和物理/化学上耐用的水下超疏油界面通过将共价交联的“反应性”多层与可拉伸的纤维基材进行简单而战略性的整合。在各种恶劣的物理和化学条件下（包括连续（1000次）拉伸变形，不同的物理磨耗测试，长时间（30天）暴露于紫外线辐射，暴露于高温和低温下），这种具有生物模仿润湿性的合成界面仍然保持不变（100°C和10°C）和严重复杂的水相。因此，这种方法提供了一种耐用且高度可拉伸的拒油界面，可用于与海底有关的各种生物医学应用，包括防止油污，油/水分离以及在柔性医疗相关基材上的抗生物结垢涂层（例如，导管球囊）。此外，在恶劣的物理/化学条件（例如，极端温度，拉伸应变，pH，海水和河水等极端条件）下，合成后的材料已成功应用于重力驱动的油/水混合物的环保分离。这项研究为这种仿生特殊润湿性的各种潜在户外应用提供了一种简便而稳健的策略。

更新日期：2018-05-04

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