Bioinspired Mechanically Robust Metal-Based Water Repellent Surface Enabled by Scalable Construction of a Flexible Coral-Reef-Like Architecture
Bioinspired Mechanically Robust Metal-Based Water Repellent Surface Enabled by Scalable Construction of a Flexible Coral-Reef-Like Architecture
复制标题
通过灵活的珊瑚礁状架构的可扩展构造实现仿生机械坚固的金属防水表面
DOI：
10.1002/smll.201901919
复制
发表时间：
2019-08-07
期刊：
影响因子：
13.3
通讯作者：
Li, Chang-Jiu
中科院分区：
文献类型：
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作者：
Luo, Xiao-Tao;Li, Chang-Jiu
机械鲁棒性是将人工超疏水表面应用于实践的核心问题。据信，本体亲水性材料不能用于构建用于超疏水性的微/纳米结构，因为亲水性表面的磨损诱导的暴露导致拒水性的显著退化。为了应对这一挑战，通过在包括金属、玻璃和陶瓷的各种基底上可扩展地构建灵活的珊瑚礁状分层结构，展示了具有金属（亲水）纹理的超疏水表面的稳健的机械耐久性。不连续的珊瑚礁状铜建筑是通过固态喷涂商业电解铜颗粒（15-65 μ m）在超音速粒子速度。随后进行火焰氧化以引入多孔硬质表面氧化物层。由于氟化硬氧化物表面层的柔性珊瑚礁状结构和自相似方式的独特组合，涂层表面以极低的滚降角（
Mechanical robustness is a central concern for moving artificial superhydrophobic surfaces to application practices. It is believed that bulk hydrophilic materials cannot be use to construct micro/nanoarchitectures for superhydrophobicity since abrasion-induced exposure of hydrophilic surfaces leads to remarkable degradation of water repellency. To address this challenge, the robust mechanical durability of a superhydrophobic surface with metal (hydrophilic) textures, through scalable construction of a flexible coral-reef-like hierarchical architecture on various substrates including metals, glasses, and ceramics, is demonstrated. Discontinuous coral-reef-like Cu architecture is built by solid-state spraying commercial electrolytic Cu particles (15-65 mu m) at supersonic particle velocities. Subsequent flame oxidation is applied to introduce a porous hard surface oxide layer. Owing to the unique combination of the flexible coral-reef-like architecture and self-similar manner of the fluorinated hard oxide surface layer, the coating surface retains its water repellency with an extremely low roll-off angle (