Cheng Mingren, Bai Haoyu, Wang Xinsheng, Chang Ze, Cao Moyuan, Bu Xian-He
School of Materials Science and Engineering, TKL of Metal and Molecule Based Material Chemistry, Nankai University, Tianjin, 300350, P. R. China.
Smart Sensing Interdisciplinary Science Center, Nankai University, Tianjin, 300350, P. R. China.
Adv Mater. 2024 Nov;36(48):e2411680. doi: 10.1002/adma.202411680. Epub 2024 Oct 14.
Metal-organic frameworks (MOFs) have emerged as exceptional moisture sorbents in low humidity conditions. However, their typical powdered form often results in agglomeration, impeding water diffusion kinetics and practical handling. To enhance the accessibility and diversify the integration of MOFs, a universal and scalable bionic interfacial assembly method is introduced for fabricating MOF-based silk. The resulting silk, enriched with a high content of MOF-303, demonstrates a significant water adsorption capacity of 315.1 mg g at 25% relative humidity, exhibiting a three fold faster water absorption compared with that of stacked MOFs powder on a gram-scale. Furthermore, it achieves efficient water release, with a rate of 8.1 mg g min under sunlight after surface photothermal modification. Through one-step drawing assembly, electrothermal wires can be incorporated into MOF-based silk and demonstrate fast and reversible moisture adsorption/desorption for indoor humidity control. It is envisioned that this assembling method and integrated functional silk will yield valuable insights into the rational engineering of MOFs toward practical applications in moisture management, molecule absorption, etc.
金属有机框架材料（MOFs）已成为低湿度条件下出色的吸湿剂。然而，它们典型的粉末形式常常导致团聚，阻碍水的扩散动力学以及实际操作。为了提高MOFs的可及性并使MOF集成方式多样化，引入了一种通用且可扩展的仿生界面组装方法来制备基于MOF的丝材。所得富含高含量MOF-303的丝材在25%相对湿度下表现出315.1 mg/g的显著吸水能力，在克级规模上与堆叠的MOFs粉末相比，吸水速度快三倍。此外，经过表面光热改性后，它在阳光下实现了8.1 mg/(g·min)的高效水释放速率。通过一步拉伸组装，电热丝可被整合到基于MOF的丝材中，并展示出用于室内湿度控制的快速且可逆的吸湿/解吸性能。可以预见，这种组装方法和集成功能丝材将为MOFs在湿度管理、分子吸附等实际应用的合理工程设计提供有价值的见解。
