Li Bucheng, Liang Weidong, Zhang Jiaren, Wei Jinfei, Mao Mingyuan, Zhang Junping
Department of Chemical Engineering, College of Petrochemical Engineering, Lanzhou University of Technology, 287 Langongping Road, Qilihe District, Lanzhou, Gansu, 730050, China.
Research Center of Resource Chemistry and Energy Materials, and State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, 18 Tianshui Middle Road, Chengguan District, Lanzhou, Gansu, 730000, China.
Small. 2024 Dec;20(51):e2406490. doi: 10.1002/smll.202406490. Epub 2024 Oct 6.
Inspired by the lotus leaf effect, superhydrophobic coatings have significant potential in various fields, However, their poor pressure resistance, weak mechanical durability, and complex preparation processes severely limit practical applications. Here, a method for preparing pressure-resistant and durable superhydrophobic coatings by simply spray-coating a phase separation suspension containing fluorinated silica nanoparticles and polyolefin adhesive onto substrates is introduced, which forms superhydrophobic coatings with a porous and hierarchical micro-/nanostructure. The resulting superhydrophobic coatings exhibit outstanding pressure resistance, maintaining a Cassie-Baxte state after 18 days of submersion in 1 m of water. Furthermore, the coatings demonstrate remarkable mechanical durability, withstanding 200 cycles of Taber abrasion, 100 cycles of tape-peeling, and 750 g of sand abrasion. The coatings also show excellent chemical stability, enduring long-term immersion in corrosive liquids and 120 d of outdoor exposure. Additionally, the coatings display excellent anti-icing properties and can be applied to various substrate surfaces. This approach improves on the limitations of conventional superhydrophobic coatings and accelerates the application of superhydrophobic coatings in real-world environments.
受荷叶效应的启发，超疏水涂层在各个领域具有巨大潜力。然而，它们的耐压力性差、机械耐久性弱以及制备工艺复杂，严重限制了实际应用。在此，介绍一种通过简单地将含有氟化二氧化硅纳米颗粒和聚烯烃粘合剂的相分离悬浮液喷涂到基材上制备耐压且耐用的超疏水涂层的方法，该方法形成具有多孔和分级微/纳米结构的超疏水涂层。所得超疏水涂层表现出出色的耐压力性，在1米深水中浸泡18天后仍保持卡西 - 巴克斯特状态。此外，涂层具有显著的机械耐久性，能经受200次泰伯磨损循环、100次胶带剥离循环和750克砂磨。涂层还表现出优异的化学稳定性，能长期浸泡在腐蚀性液体中并在户外暴露120天。此外，涂层具有出色的防冰性能，可应用于各种基材表面。这种方法改进了传统超疏水涂层的局限性，并加速了超疏水涂层在实际环境中的应用。
