Wang Yamei, Zhang Kaiteng, Cui Xianxian, Zhao Zehui, Wang Zelinlan, Liu Guang, Zhang Yi, Zhu Yantong, Chen Jichen, Sun Shize, Liu Xiaolin, Chen Huawei
School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China.
Key Laboratory of Icing and Anti/De-icing, China Aerodynamics Research and Development Center, Mianyang, Sichuan 621000, China.
ACS Appl Mater Interfaces. 2024 Aug 7;16(31):41400-41408. doi: 10.1021/acsami.4c03683. Epub 2024 Jul 28.
A photo/electrothermal surface can convert sunlight and electricity into heat to solve icing problems. The combination of active photo/electrothermal surfaces with passive slippery surfaces provides a highly efficient strategy for all-day anti/deicing. However, the lack of transparency remains a primary impediment to the widespread application of these anti-icing measures in photovoltaics, windshields, and other fields. Herein, we report a bilayer transparent photo/electrothermal coating with a liquid-like slippery property for all-day anti/deicing. The prepared coating exhibits ultraslippery, low ice adhesion, and enhanced stability properties through covalent grafting of polydimethylsiloxane (PDMS) brushes in a cross-linked skeleton of epoxy. Moreover, the coating demonstrates a visible transmittance of up to 77% and effectively absorbs ultraviolet and near-infrared light due to the addition of ultraviolet and infrared absorbers, resulting in a temperature increase under sun illumination. The bottom indium tin oxide layer is fabricated to provide the composite coating with electrothermal capability, so that it can achieve all-weather deicing. The coupling of photo/electrothermal and slippery properties can promote the rapid removal of grown ice in a short time. The slippery properties and their exceptional durability under mechanical, optical, and thermal conditions render the composite coatings highly promising for engineering applications.
光热/电热表面可以将阳光和电能转化为热量，以解决结冰问题。活性光热/电热表面与被动光滑表面相结合，为全天候防冰/除冰提供了一种高效策略。然而，缺乏透明度仍然是这些防冰措施在光伏、挡风玻璃和其他领域广泛应用的主要障碍。在此，我们报道了一种具有类液体光滑特性的双层透明光热/电热涂层，用于全天候防冰/除冰。通过在环氧交联骨架中对聚二甲基硅氧烷（PDMS）刷进行共价接枝，制备的涂层具有超光滑、低冰附着力和增强的稳定性。此外，由于添加了紫外线和红外线吸收剂，该涂层的可见光透过率高达77%，并能有效吸收紫外线和近红外光，从而在阳光照射下实现温度升高。底部的氧化铟锡层用于赋予复合涂层电热能力，使其能够实现全天候除冰。光热/电热与光滑特性的耦合可促进在短时间内快速去除生长的冰。光滑特性及其在机械、光学和热条件下的卓越耐久性使复合涂层在工程应用中极具前景。
