Li Jie, Wang Jiaming, Li Qingqing, Zhang Mengxi, Li Jiani, Sun Chao, Yuan Shuai, Feng Xiao, Wang Bo
Frontiers Science Center for High Energy Material, Advanced Technology Research Institute (Jinan), Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China.
Angew Chem Int Ed Engl. 2021 Sep 20;60(39):21304-21309. doi: 10.1002/anie.202102047. Epub 2021 Jun 29.
Coordination polymer (CP) glasses offer a way to tackle the fabrication challenges encountered by inorganic porous membranes and show great potentials for size-exclusive gas separation. However, their processability and performance still cannot simultaneously meet the requirements for high-performance membrane separation. Herein, we have developed a series of CP glasses (M-P-dmbIm, M=Zn, Cd, Cu, and Mn), which possess low vitrification temperature as well as low viscosity (η) and lave capability above the transition temperatures. The derived glass (a M-P-dmbIm) membranes show outstanding performances for H /CO , H /N , and H /CH separation, which all far surpass the Robeson upper bound and even rival against the best of the state-of-the-art gas separation membranes. The low viscosities not only allow us to hot-cast or hot-press the CP glasses into thin membranes within 5 min without sacrificing their selectivity and permeability, but also endow the resulted glass membranes with healing ability.
配位聚合物（CP）玻璃为解决无机多孔膜所面临的制造挑战提供了一条途径，并在尺寸选择性气体分离方面显示出巨大潜力。然而，它们的可加工性和性能仍无法同时满足高性能膜分离的要求。在此，我们开发了一系列CP玻璃（M-P-dmbIm，M = Zn、Cd、Cu和Mn），它们具有较低的玻璃化转变温度以及低粘度（η），并且在转变温度以上具有浇铸能力。由此得到的玻璃（a M-P-dmbIm）膜在H₂/CO₂、H₂/N₂和H₂/CH₄分离方面表现出色，所有这些性能都远远超过了罗伯逊上限，甚至可与最先进的气体分离膜相媲美。低粘度不仅使我们能够在5分钟内将CP玻璃热浇铸或热压成薄膜，而不牺牲其选择性和渗透性，还赋予了所得玻璃膜自愈能力。
