Zhao Zhiheng, Zhang Qi, Song Xudong, Chen Jing, Ding Yitong, Wu Hong, Guo Shaoyun
The State Key Laboratory of Polymer Materials Engineering, Sichuan Provincial Engineering Laboratory of Plastic/Rubber Complex Processing Technology, Polymer Research Institute of Sichuan University, Chengdu 610065, China.
ACS Appl Mater Interfaces. 2023 Jan 18;15(2):3522-3533. doi: 10.1021/acsami.2c20714. Epub 2023 Jan 4.
Superhydrophobic photothermal coatings are promising for multifunctional applications due to the efficient use of solar energy, but the current challenge is to seek one easy-to-prepare material with high photothermal performance. Herein, inspired by mussel adhesion and lotus leaf surfaces, we developed superhydrophobic photothermal coatings with hierarchical structure by depositing melanin-like polydopamine (PDA) and dip-coating polydimethylsiloxane (PDMS)/hydrophobic fumed silica (SiO) sequentially. Benefitting from the efficient photothermal conversion performance of PDA, the coated fabric can rapidly warm up to 100 °C under 100 mW/cm sun irradiation. Meanwhile, the coatings show excellent superhydrophobic properties (WCA of 163°), which not only prevent the adhesion of the contaminant from maintaining a long-term and efficient photothermal performance but also help the fabric to own outstanding passive anti-icing and active deicing performances. Furthermore, the superhydrophobic properties of the coatings can be maintained after sandpaper abrasion, repeat tape-peeling, and ultrasonication. In addition, superior UV protection of the coatings can meet the long-term service conditions under outdoor sunlight. The PDA-based superhydrophobic photothermal coatings are believed to inspire new strategies for solar-driven multifunctional applications such as personal thermal management, anti-icing/deicing of variously shaped components, photothermal antibacterial, and so on.
超疏水光热涂层由于能有效利用太阳能，在多功能应用方面颇具前景，但目前面临的挑战是寻找一种易于制备且具有高光热性能的材料。在此，受贻贝附着力和荷叶表面的启发，我们通过依次沉积类黑色素聚多巴胺（PDA）并浸涂聚二甲基硅氧烷（PDMS）/疏水性气相二氧化硅（SiO），开发出具有分级结构的超疏水光热涂层。受益于PDA高效的光热转换性能，涂覆的织物在100 mW/cm的太阳光照射下可迅速升温至100°C。同时，涂层表现出优异的超疏水性能（水接触角为163°），这不仅能防止污染物附着，保持长期高效的光热性能，还能帮助织物具备出色的被动防冰和主动除冰性能。此外，涂层的超疏水性能在砂纸磨损、反复胶带剥离和超声处理后仍能保持。另外，涂层卓越的紫外线防护性能可满足户外阳光长期照射下的使用条件。基于PDA的超疏水光热涂层有望为太阳能驱动的多功能应用激发新策略，如个人热管理、各种形状部件的防冰/除冰、光热抗菌等。
