Ultrathin ZIF-8 Membrane through Inhibited Ostwald Ripening for High-Flux C3H6/C3H8 Separation

作     者：Wang, Jianyu Wang, Yan Liu, Yutao Wu, Hong Zhao, Mingang Ren, Yanxiong Pu, Yunchuan Li, Wenping Wang, Shaoyu Song, Shuqing Liang, Xu He, Guangwei Han, You Jiang, Zhongyi 

作者机构：Tianjin Univ Key Lab Green Chem Technol Minist Educ Sch Chem Engn & Technol Tianjin 300072 Peoples R China Collaborat Innovat Ctr Chem Sci & Engn Tianjin 300072 Peoples R China Haihe Lab Sustainable Chem Transformat Tianjin 300192 Peoples R China Tianjin Univ Sch Chem Engn & Technol Tianjin 300072 Peoples R China Tianjin Univ Joint Sch Natl Univ Singapore & Tianjin Univ Int Campus Fuzhou 350207 Peoples R China Chem & Chem Engn Guangdong Lab Shantou 515031 Peoples R China 

出 版 物：《ADVANCED FUNCTIONAL MATERIALS》 (实用新材料)

年 卷 期：2022年第32卷第47期

页      面：2208064-2208064页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China [21838008, U20B2023, 21621004, 21878215] National Key R&D Program of China [2017YFB0603400] Program of Introducing Talents of Discipline to Universities [BP0618007] Chemistry and Chemical Engineering Guangdong Laboratory Haihe Laboratory of Sustainable Chemical Transformations 

主　　题：C H-3 (6) C H-3 (8) separations inhibited Ostwald ripening metal-organic frameworks ultrathin ZIF-8 membranes 

摘      要：Metal-organic frameworks (MOFs) are one of the most promising membrane materials for olefin/paraffin separations. However, most of MOF membranes have a thickness over 1 mu m, which greatly compromises the permeation flux. While previous studies are focused on increasing crystal nucleus density on the substrates, achieving ultrathin membrane via modulation of the crystal growth is lacking. Herein, an inhibited Ostwald ripening (IOR) strategy is proposed to fabricate ultrathin ZIF-8 membranes, through incorporating polymer-based inhibitors into the membrane formula to inhibit the growth process of ZIF-8 crystals via the metal-organic coordination. The IOR process can be readily tuned by varying the functional groups, molecular weights, and concentrations of the inhibitors, enabling a facile control over the IOR degree and thus the membrane thickness. Consequently, the thickness of ZIF-8 membranes can be dramatically reduced to 180 nm. The resulting membranes exhibit ultrahigh C3H6/C3H8 separation performance with C3H6 permeance of 386 GPU and C3H6/C3H8 separation factor of 120. It is anticipated that this straightforward and efficient IOR strategy can open a new avenue for the fabrication of ultrathin MOF membranes to tackle many critical molecular separations.