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Versatile, mechanochemically robust, sprayed superomniphobic coating enabling low surface tension and high viscous organic liquid bouncing
Chemical Engineering Journal ( IF 13.3 ) Pub Date : 2020-07-08 , DOI: 10.1016/j.cej.2020.126160
Hailong Zhang , Xingxiang Ji , Libin Liu , Jinping Ren , Furong Tao , Congde Qiao

Superomniphobicity repelling both water and organic liquids is an important feature of special wettability material, which has received great attention in surface/interface area. The bottleneck in the real application is how to develop robust superomniphobic surface by using cost-effective, scalable, facile materials and methods. Here, we report a superomniphobic coating by using low-cost and scalable spraying suspensions method. The sprayed superomniphobic coating assembles into multi-leveled micro/nanostructures with very low apparent surface free energy of 12.98 mN m−1. The coating is capable of diverse organic liquids bouncing with liquid surface tension low to 21 mN m−1 and viscosity high to 297.8 mPa s. Remarkably, the coating can be applied in different substrates due to the in-situ formed adhesive and demonstrates strong mechanical robustness under high pressure water impact (27.8 m s−1), abrasion and tape-peeling cycles, and sustains exposure to highly corrosive aqua regia, extreme low/high temperature and UV environments. The organic liquid bouncing behavior related to impact velocity and liquid properties were also studied. With facile fabrication and multifaceted robustness, our coating paves the way for real industrial applications.



中文翻译:

多功能,机械化学坚固,喷涂的超疏水涂层,可实现低表面张力和高粘性有机液体弹跳

排斥水和有机液体的超憎水性是特殊的润湿性材料的重要特征,在表面/界面区域受到了极大的关注。实际应用中的瓶颈是如何通过使用经济高效,可扩展,易用的材料和方法开发坚固的超憎水表面。在这里,我们通过使用低成本和可扩展的喷雾悬浮液方法报告了一种超憎水性涂料。喷涂的超憎水性涂层组装成具有很低的表观表面自由能12.98 mN m -1的多层微结构/纳米结构。该涂层能够以低至21 mN m -1的液体表面张力弹跳各种有机液体粘度高达297.8 mPa s。值得注意的是,由于原位形成的粘合剂,该涂料可应用于不同的基材,并在高压水冲击(27.8 m s -1),磨蚀和胶带剥离循环下表现出强大的机械强度,并保持暴露于高度腐蚀性的王水中,极端低温/高温和紫外线环境。还研究了与冲击速度和液体性质有关的有机液体弹跳行为。凭借简便的制造和多方面的坚固性,我们的涂料为真正的工业应用铺平了道路。

更新日期:2020-07-13
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