Oak Ridge Institute for Science and Education (ORISE) , Oak Ridge , Tennessee 37830 , United States.
National Energy Technology Laboratory , Pittsburgh , Pennsylvania 15236-0940 , United States.
ACS Appl Mater Interfaces. 2018 Jul 25;10(29):24784-24790. doi: 10.1021/acsami.8b06592. Epub 2018 Jul 10.
Metal organic framework (MOF)/polymer composite membranes are of interest for gas separations, as they often have performance that exceeds the neat polymer. However, traditional composite membranes, known as mixed matrix membranes (MMMs), can have complex and time-consuming preparation procedures. The MOF and polymer are traditionally prepared separately and require priming and mixing to ensure uniform distribution of particles and compatibility of the polymer-particle interface. In this study, we reduce the number of steps using an in situ MOF growth strategy. Herein, MMMs are prepared by growing MOF (UiO-66) in situ within a Matrimid polymer matrix while simultaneously curing the matrix. The gas separation performance for MMMs, prepared using this approach, was evaluated for the CO/N separation and compared with MMMs made using the traditional postsynthesis mixing. It was found that MMMs prepared using both the in situ MOF growth strategy and by traditional postsynthesis mixing are equivalent in performance. However, using the in situ MOF growth allows for a simpler, faster, and potentially more economical fabrication alternative for MMMs.
金属有机骨架（MOF）/聚合物复合膜在气体分离中很有吸引力，因为它们的性能通常超过纯聚合物。然而，传统的复合膜，即混合基质膜（MMM），其制备过程可能很复杂且耗时。传统上，MOF 和聚合物是分别制备的，需要进行预浸渍和混合，以确保颗粒的均匀分布和聚合物-颗粒界面的相容性。在本研究中，我们使用原位 MOF 生长策略减少了步骤数。在此，通过在 Matrimid 聚合物基质中原位生长 MOF（UiO-66）同时固化基质来制备 MMM。使用这种方法制备的 MMM 的气体分离性能用于 CO/N 分离，并与使用传统后合成混合方法制备的 MMM 进行了比较。结果发现，使用原位 MOF 生长策略和传统后合成混合方法制备的 MMM 在性能上是等效的。然而，使用原位 MOF 生长可以为 MMM 的制造提供更简单、更快且潜在更经济的替代方案。
