Hurrle Silvana, Friebe Sebastian, Wohlgemuth Jonas, Wöll Christof, Caro Jürgen, Heinke Lars
Preparative Macromolecular Chemistry, Institut für Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstr. 18, 76128, Karlsruhe, Germany.
Institut für Biologische Grenzflächen, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
Chemistry. 2017 Feb 16;23(10):2294-2298. doi: 10.1002/chem.201606056. Epub 2017 Jan 20.
Despite their huge potential for efficient molecular separation, the fabrication of membranes from metal-organic frameworks (MOFs) remains a major challenge. The powders obtained by the conventional solvothermal MOF syntheses are difficult to process, and as a result the fabrication of well-performing, large-area MOF-based membranes is still awaiting success. The deposition of MOF thin films suited for membrane applications is demonstrated by employing a step-by-step spray method. This method can be scaled up to obtain industrially relevant membrane areas and a continuous process is also possible. The performance of sprayed HKUST-1-based membranes by the separation of a binary H /CO mixture is also demonstrated. Furthermore, this approach enables the control of the MOF film thickness, and thus controlling the permeance and the selectivity of the membrane.
尽管金属有机框架（MOF）在高效分子分离方面具有巨大潜力，但由MOF制备膜仍然是一项重大挑战。通过传统溶剂热MOF合成获得的粉末难以加工，因此，制备性能良好的大面积MOF基膜仍未成功。通过采用逐步喷涂法证明了适合膜应用的MOF薄膜的沉积。该方法可以扩大规模以获得与工业相关的膜面积，并且连续过程也是可行的。还展示了通过分离二元H₂/CO₂混合物得到的喷涂HKUST-1基膜的性能。此外，这种方法能够控制MOF膜的厚度，从而控制膜的渗透率和选择性。
