材料科学
硅氧烷
涂层
接触角
硅醇
纳米颗粒
聚氨酯
制作
超疏水涂料
化学工程
复合材料
磨损(机械)
纳米复合材料
聚合物
纳米技术
有机化学
医学
化学
替代医学
病理
工程类
催化作用
作者
Yuting Zhao,Tonghui Hao,Wei Wu,Yuan Meng,Xianwu Cao,Qunchao Zhang,Wei She,Jun You,Dean Shi,Tao Jiang
标识
DOI:10.1016/j.apsusc.2022.152446
摘要
Superhydrophobic coatings have attracted extensive interest owing to their excellent water repellence property. However, low durability, environmentally harmful fabrication methods, and complex fabrication methods severely limit their widely practical applications. In this work, we demonstrate an eco-friendly, robust, superhydrophobic matrix coating based on siloxane-modified hyperbranched waterborne polyurethane (Si-HBPU) in combination with fluorinated silica nanoparticles (F-SiO2). The superhydrophobic coating was constructed by convenient process of casting Si-HBPU onto the substrate, which was regulated by a moisture-controlled model, and then F-SiO2 nanoparticles were uniformly seeded onto the surface of semi-cured Si-HBPU. The Si-HBPU covalently bonds to F-SiO2 nanoparticles for the reason that Si-HBPU possesses many polar groups (such as Si-OH), which utilized the silanol groups to chemically bond with the surface hydroxyl of the substrate and F-SiO2 nanoparticles to form a solid SiOSi cross-linking network. The resulted coating exhibited an excellent water repellency with contact angles of ∼ 163° and sliding angles of ∼ 3°. And benefiting from the establishment of the stable SiOSi binding, the modified coating demonstrates excellent mechanical robustness, and is capable of maintaining superhydrophobicity after 140 cycles of sandpaper abrasion. The resultant coating shows excellent anti-icing/deicing performance: the water-freezing time can be postponed to 2205 s at −20℃ and the ice adhesion is significantly lower than that of a pure copolymer coating (∼21.2 KPa). Moreover, the Si-HBPU/ F-SiO2 coating also demonstrated excellence in scratch resistantance, anti-fouling and anti-corrosion performances. These remarkable performances may promote the development of large-scale operation and practical application.
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