Qiao Zhihua, Zhao Song, Sheng Menglong, Wang Jixiao, Wang Shichang, Wang Zhi, Zhong Chongli, Guiver Michael D
Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China.
State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin, China.
Nat Mater. 2019 Feb;18(2):163-168. doi: 10.1038/s41563-018-0221-3. Epub 2018 Nov 19.
Metal-induced ordered microporous polymers (MMPs), a class of porous polymer, are synthesized from amine-bearing polymers, small organic linkers and divalent metal ions using a polymer-directed chemical synthesis process. Specifically, small organic linkers first coordinate to metal ions, with the resulting unit cells then self-assembling along the extension of polymer chains to construct three-dimensional frameworks. The MMPs demonstrate good controllability of crystal and framework size, as well as hydrolytic stability. MMP dispersions were coated on a modified polysulfone substrate to fabricate MMP/mPSf membranes with an ultrathin selective layer (below 50 nm) and surface areas of >100 cm. The MMPs are readily fabricated into defect-free thin selective-layered membranes with high CO permeance (3,000 GPU) and stable CO/N selectivity (78) under both humid and dry gas feed conditions, demonstrating promising CO membrane separation performance. This synthetic methodology could be extended to other polymers, potentially enabling facile synthesis of membrane materials.
金属诱导有序微孔聚合物（MMPs）是一类多孔聚合物，它是通过聚合物导向化学合成过程，由含胺聚合物、小分子有机连接体和二价金属离子合成的。具体而言，小分子有机连接体首先与金属离子配位，然后所得的晶胞沿着聚合物链的延伸方向自组装，构建三维骨架。MMPs表现出良好的晶体和骨架尺寸可控性以及水解稳定性。将MMP分散体涂覆在改性聚砜基底上，以制备具有超薄选择性层（低于50nm）且表面积大于100cm²的MMP/聚砜膜。MMPs易于制成无缺陷的薄选择性层膜，在潮湿和干燥气体进料条件下均具有高CO渗透通量（3000 GPU）和稳定的CO₂/N₂选择性（78），展现出有前景的CO₂膜分离性能。这种合成方法可以扩展到其他聚合物，有可能实现膜材料的简便合成。
