Gu Wancheng, Xia Yage, Li Long, Zhang Yu, Wu Xuequn, Gu Linwei, Ji Yanzheng, Wang Wei, Deng Weilin, Lv Xinyu, Wang Xikui, Yu Xinquan, Zhang Youfa
School of Materials Science and Engineering, Southeast University, Nanjing, 211189, P. R. China.
The 723 Institute of CSSC, Yangzhou, 225101, P. R. China.
Small. 2024 Mar;20(13):e2307561. doi: 10.1002/smll.202307561. Epub 2023 Nov 15.
Multifunction superhydrophobic coatings that facilitate water harvesting are attractive for addressing the daunting water crisis, yet, they are caught in a double bind when their durability is considered, as durable coatings will require both tough micro-textures to survive concentrated stress and high-surface-energy chemistry to form chemical bonds within the matrix. To date, a universal bulk-phase coating that combines multifunctionality, ultra-durability, and fabrication feasibility remains challenging. Here, a binary cooperative cell design is reported that can solve the contradiction between the multifunctionality and durability requirements of superhydrophobic coatings. In this strategy, mechanochemically tailored cells with releasable nanoseeds are infused in the common matrix, which serves both as a versatile chemical bridge to achieve strong bonds within the coating building blocks, and as an instantaneous self-repairing generator to improve durability. Such a strategy significantly boosted the wear resistance and outdoor stability of the coatings by over 30-100 and 18 folds, respectively, compared with conventional coatings. The coating is applied to the sustainable application, i.e., enhancing the water collection efficiency by at least 1000% even after harsh abrasion. The strategy will broaden the vision in handling the dilemma properties among functional coatings and promote the application of superhydrophobic coatings in extreme environments.
有助于集水的多功能超疏水涂层对于应对严峻的水危机具有吸引力，然而，在考虑其耐久性时，它们陷入了两难境地，因为耐用的涂层既需要坚韧的微观纹理来承受集中应力，又需要高表面能化学物质在基体中形成化学键。迄今为止，一种兼具多功能性、超耐久性和制造可行性的通用本体涂层仍然具有挑战性。在此，报道了一种二元协同单元设计，它可以解决超疏水涂层多功能性和耐久性要求之间的矛盾。在这种策略中，将带有可释放纳米种子的机械化学定制单元注入到普通基体中，该基体既作为一种通用的化学桥梁，在涂层构建块内实现强键合，又作为一种即时自修复发生器来提高耐久性。与传统涂层相比，这种策略分别使涂层的耐磨性和户外稳定性显著提高了30至100倍和18倍。该涂层应用于可持续应用，即即使在剧烈磨损后，集水效率也能提高至少1000%。该策略将拓宽处理功能涂层中两难特性的视野，并促进超疏水涂层在极端环境中的应用。
