Zhang Caiyun, Song Jia, Lin Lingtong, Zhang Honggang, Liu Yuanyuan, Wang Zeyan, Wang Peng, Zheng Zhaoke, Cheng Hefeng, Dai Ying, Huang Baibiao
State Key Lab of Crystal Materials, Shandong University, Shandong, 250100, P. R. China.
School of Physics, Shandong University, Shandong, 250100, P. R. China.
ChemSusChem. 2025 Jan 14;18(2):e202401319. doi: 10.1002/cssc.202401319. Epub 2024 Sep 19.
Metal organic frameworks (MOFs) are a class of potential superhydrophobic-oleophilic materials. The organic ligands in superhydrophobic MOFs usually contain long alkyl chains, fluorine groups or aromatic rings with large π conjugation, the preparation of which suffers from high cost, complex operation and so on. In addition, the topological structure of MOFs plays an important role in the hydrophobicity, which may be ignored previously. Here we report a superhydrophobic-oleophilic MOF (BiPPA) obtained by a facile and fast method, which not only displays a large water contact angle of up to 163° and a small sliding angle of nearly equal to 0°, but also exhibits high sorption capacity for multiple oils and organic solvents, well reusability and high oil retention. In addition, BiPPA is stable in a wide pH range (0.5-11.0). Finally, the single crystal structure of BiPPA is resolved to reveal the intrinsic reason for the super-hydrophobicity. This work may inspire the further design of pristine superhydrophobic MOFs based on a simple method, which enriches the family of superhydrophobic MOFs and has great significance for practical applications.
金属有机框架材料（MOFs）是一类具有潜在超疏水-亲油性能的材料。超疏水MOFs中的有机配体通常含有长烷基链、氟基团或具有大π共轭的芳香环，其制备存在成本高、操作复杂等问题。此外，MOFs的拓扑结构对疏水性起着重要作用，这一点在以前可能被忽视。在此，我们报道了一种通过简便快速的方法获得的超疏水-亲油MOF（BiPPA），它不仅具有高达163°的大接触角和几乎等于0°的小滑动角，而且对多种油类和有机溶剂表现出高吸附容量、良好的可重复使用性和高持油率。此外，BiPPA在较宽的pH范围（0.5 - 11.0）内稳定。最后，解析了BiPPA的单晶结构以揭示其超疏水的内在原因。这项工作可能会激发基于简单方法对原始超疏水MOFs的进一步设计，丰富了超疏水MOFs家族，对实际应用具有重要意义。
