Surface modification of bilayer structure on metal-organic frameworks towards mixed matrix membranes for efficient propylene/propane separation

Recent advances in the interfacial engineering of MOF-based mixed matrix membranes for gas separation

“…This resulted in the rapid formation of solid polymer networks within 30 seconds, preventing nanoparticle aggregation and precipitation during the membrane formation process. 104 while preserving good interfacial compatibility. In addition, the UV-induced photopolymerisation process promoted the formation of holes in the cross-linked poly(ethylene oxide) (XLPEO) polymer matrix.…”

“…This resulted in the rapid formation of solid polymer networks within 30 seconds, preventing nanoparticle aggregation and precipitation during the membrane formation process. 104 In another study, Qiao et al developed a bilayer modification strategy on MOFs to create efficient MOF-based MMMs for C 3 H 6 /C 3 H 8 separation. The structure of MOFs can be improved by grafting an octadecylphosphonic acid-lecithin-cholesterol bilayer onto their surface.…”

Recent Progress and Challenges in the Field of Metal–Organic Framework-Based Membranes for Gas Separation

“…Furthermore, doping 2-aminobenzimidazole (ambz) [116] and ionic liquid (IL)/Ag + [109] into ZIF-8 could improve the membrane performance. ZIF-8 is mostly employed as a leading polycrystalline membrane candidate for C 3 H 6 /C 3 H 8 separation, and few membranes other than ZIF-8 have been reported so far (Table 5) [93,97,100,102,103,109,[117][118][119][120][121][122][123][124][125], while MOFs other than ZIF-8 have been used as fillers for MMMs (Table 6) [126][127][128][129][130][131][132][133][134][135]. It is important to explore the possibilities of other MOFs and optimize the interaction between the MOF filler and the polymer matrix with the help of computational simulations.…”

Cross-Linked Polyimide/ZIF-8 Mixed-Matrix Membranes by In Situ Formation of ZIF-8: Effect of Cross-Linking on Their Propylene/Propane Separation

“…Despite their potentials [ 5 , 6 , 7 ], there have been only a few reports on MMMs in more scalable geometries, such as hollow fibers (i.e., mixed-matrix hollow fiber membranes with submicron selective skin layers) for large-scale applications [ 8 ]. This is due to several challenges of applying established hollow fiber spinning processes to mixed-matrix hollow fiber membrane (MMHFM) fabrication, often leading to a poor interface between the polymer matrix and fillers [ 9 ], filler agglomeration [ 10 ], several micron-thick selective skin layers [ 11 ], and others.…”