Ultraviolet (UV)-durable superhydrophobic nanocomposite thin films have been successfully fabricated on aluminum substrates by embedding cobalt stearate (CoSA)-coated TiO₂ nanoparticles in a hydrophobic polymethylhydrosiloxane (PMHS) matrix (PMHS/TiO₂@CoSA) using the sol–gel process. When compared to the sharp decrease of water contact angle (WCA) on the superhydrophobic PMHS/TiO₂ thin films, the PMHS/TiO₂@CoSA superhydrophobic thin films exhibited a nearly constant WCA of 160° under continuous UV irradiation for more than 1 month. The designed scheme of the TiO₂@CoSA core–shell structure not only increased the hydrophobic properties of the TiO₂ nanoparticle surface but also confined the photocatalytic efficiency of TiO₂ nanoparticles. A plausible model has been suggested to explain the UV-durable mechanism of the superhydrophobic nanocomposite thin films based on PMHS/TiO₂@CoSA. Furthermore, the elongated lifetime in the exposure of the solar light imparts this superhydrophobic nanocomposite thin film with potential practical applications where UV-resistant properties are emphasized including corrosion-resistant building walls, anti-icing airplanes, self-cleaning vehicles, and so forth.

中文翻译：

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基于硬脂酸钴包覆的TiO ₂纳米粒子与聚甲基氢硅氧烷结合的耐紫外线的超疏水纳米复合薄膜

通过使用溶胶-凝胶将硬脂酸钴（CoSA）涂层的TiO ₂纳米颗粒嵌入疏水性聚甲基氢硅氧烷（PMHS）基质（PMHS / TiO ₂ @CoSA）中，已成功在铝基板上成功制造了耐紫外线（UV）持久的超疏水纳米复合薄膜。过程。与超疏水PMHS / TiO ₂薄膜上的水接触角（WCA）急剧下降相比，在连续紫外线照射1个月以上时，PMHS / TiO ₂ @CoSA超疏水薄膜的WCA几乎恒定为160°。 。TiO ₂ @CoSA核-壳结构的设计方案不仅提高了TiO ₂的疏水性纳米粒子的表面，但也限制了TiO ₂纳米粒子的光催化效率。已经提出了一个合理的模型来解释基于PMHS / TiO ₂ @CoSA的超疏水纳米复合薄膜的紫外线持久性机理。此外，延长的太阳光暴露寿命使这种超疏水性纳米复合薄膜具有潜在的实际应用，其中强调了抗紫外线性能，包括耐腐蚀的建筑墙面，防冰飞机，自清洁车辆等。