Binrui Wu, Qiong Qin, Xuan Jiao, Dong Xu, Li Ke, Liping Sheng, Xin Cui, Qizhi Zhao, Feiyan Fu, Xian Yi
State Key Laboratory of NBC Protection for Civilian, Beijing 102205, P. R. China.
Key Laboratory of Icing and Anti/De-icing, China Aerodynamics Research and Development Center, Mianyang Sichuan 621000, P.R. China.
Nanoscale. 2023 Dec 7;15(47):19304-19313. doi: 10.1039/d3nr04296k.
Durability is still the main issue hindering the practical applications of superhydrophobic surfaces. In the case of superhydrophobic coatings, employing nanoparticles for constructing and retaining superhydrophobic surfaces without lowering the robustness is still a conundrum. Herein, inspired by concrete, which has a high filler portion and high robustness, we fabricated a superhydrophobic coating using a synthesized hydrophobic organic/inorganic hybrid resin and categorized micro/nano fillers with varying sizes. The hybrid resin improved the hydrophobicity and robustness of the coating. Also, by optimizing the content of categorized wearable (silica sand with varying sizes)/functional (aluminum nanoparticles)/low-surface-energy (PTFE) phases, the prepared superhydrophobic surfaces could achieve long abrasion distance coupled with a high retention rate. Also, the prepared sample retained its superhydrophobicity after abrasion by sandpaper (180 grit) for 10 m under a pressure as high as 22.5 kPa or 600 grit sandpaper for 12.8 m under the same pressure or when impacted by 1400 g sand particles from 30 cm. Also, the coating had a strong adhesion of 5B with the substrate. Thus, the designed attractive materials have the potential for self-cleaning, anti-icing, and anti-fouling applications in industries.
耐久性仍然是阻碍超疏水表面实际应用的主要问题。对于超疏水涂层而言，在不降低其坚固性的情况下，使用纳米颗粒来构建和保持超疏水表面仍是一个难题。在此，受具有高填料比例和高坚固性的混凝土启发，我们使用合成的疏水有机/无机杂化树脂和不同尺寸的分级微/纳米填料制备了一种超疏水涂层。该杂化树脂提高了涂层的疏水性和坚固性。此外，通过优化分级的耐磨（不同尺寸的硅砂）/功能（铝纳米颗粒）/低表面能（聚四氟乙烯）相的含量，所制备的超疏水表面能够实现长磨损距离以及高保留率。而且，制备的样品在高达22.5 kPa的压力下被180目砂纸磨损10米、或在相同压力下被600目砂纸磨损12.8米、或被从30厘米处落下的1400克砂粒冲击后仍保持其超疏水性。此外，该涂层与基底具有5B的强附着力。因此，所设计的这种引人注目的材料在工业中具有自清洁、防冰和防污应用的潜力。
