Liquid-Infused Smooth Coating with Transparency, Super-Durability, and Extraordinary Hydrophobicity
Liquid-Infused Smooth Coating with Transparency, Super-Durability, and Extraordinary Hydrophobicity
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DOI：
10.1002/adfm.201602546
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发表时间：
2016-10-04
影响因子：
19
通讯作者：
Shiratori, Seimei
中科院分区：
文献类型：
--
作者：
Tenjimbayashi, Mizuki;Togasawa, Ryo;Shiratori, Seimei
液体灌注涂层由于其流动性而对于具有多功能特性（例如自修复、透射率和耐久性）的疏水性材料具有相当大的技术重要性。然而，常规涂层将粘性液体吸收到其海绵状结构表面中，导致不可控的液体层形成或液体输送。此外，疏水液体保留表面可引起不稳定性，并由于液体层蒸发而导致疏水性、光学性质和柔性的限制。在这里，我们报告了一个可控的液体层形成光滑表面（R-rms < 1 nm）的π电子相互作用的策略。使用该技术，癸基三甲氧基硅烷的超亲油润湿导致具有π相互作用液体吸附、光滑度和疏水性（SPLASH）的表面的设计，其显示出非凡的疏水性（CAH = 0.75度），以及对包括微米尺寸的雾的各种水基溶液的稳定排斥性。液体层下的固体的光滑度使得SPLASH能够表现出稳定的疏水性、透明度（>90%）、结构损伤耐久性和柔性，而不管通过弯曲或蒸发的液体层厚度如何。此外，图案化的π电子在光滑涂层上的定位使得能够控制液体层形成和液体输送。这一策略可以为设计功能液体表面提供新的见解，我们设计的具有多功能特性的表面可以开发用于各种应用。
Liquid-infused coatings are because of their fluidity of considerable technological importance for hydrophobic materials with multifunctional properties, such as self-healing, transmittance, and durability. However, conventional coatings absorb viscous liquid into their sponge-like structured surface, causing uncontrollable liquid layer formation or liquid transport. In addition, a hydrophobic-liquid-retained surface can cause instability and lead to limitation of the hydrophobicity, optical properties, and flexibility due to liquid layer evaporation. Here, we report a strategy for controllable liquid-layer formation on smooth surfaces (R-rms < 1 nm) by pi-electron interactions. Using this technology, superoleophilic wetting of decyltrimethoxysilane results in the design of a surface with pi-interaction liquid adsorption, smoothness, and hydrophobicity (SPLASH), that shows extraordinary hydrophobicity (CAH = 0.75 degrees), and stable repellence for various water-based solutions including micrometer-sized mist. The smoothness of the solid under a liquid layer enabled the SPLASH to exhibit stable hydrophobicity, transparency (>90%), structure damage durability and flexibility, regardless of the liquid layer thickness by bending or evaporation. Furthermore, the patterned pi-electrons' localization on the smooth coating enables controlled liquid-layer formation and liquid transport. This strategy may provide new insights into designing functional liquid surfaces and our designed surface with multifunctional properties could be developed for various applications.