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Hybrid organic–inorganic membranes which called as mixed matrix membranes (MMMs) based on Poly(ether-sulfone) (PES) and Materials Institute Lavoisier (MIL-53) (Al) are successfully prepared through a phase inversion method. The XRD and FTIR analyses confirm the formation of MIL-53 (Al) and classified as a mesoporous material with irregular morphology according to nitrogen sorption isotherm and SEM analysis. The loading of MIL-53 (Al) into PES varies from 10, 20, 30, and 40% (w/w). No chemical interaction is observed between MIL-53 (Al) and PES in MMMs based on FTIR analysis. Agglomeration in MMMs is observed at the addition of 40% (w/w) MIL-53 (Al) with an increase in the thermal stability of MMMs up to 50 °C. The gas separation is tested by calculating the gas permeability of N2, O2, and CO2 and reached optimum condition in the addition of MIL-53 (Al) 30% (w/w) with increasing permeability values, respectively, 4, 6, and 8 times higher than the pristine PES membrane. The optimum selectivity of CO2/N2 and CO2/O2 is achieved in the addition of MIL-53 (Al) by 30 and 40% (w/w) with an increase in selectivity values 62.58 and 26.70%, respectively, compared to the selectivity of net PES membrane.

Novel mixed matrix membranes (MMMs) based on polyethersulfone (PES) and [Al12O(OH)18 (H2O)3(btc)6] (btc: benzene-1,3,5-tricarboxylic acid), also known as Material of Institute Lavoisier (MIL)-96 (Al), fillers were successfully prepared using a conventional printing method with the wet phase inversion technique. Membranes for gas separation were successfully prepared using PES 35% w/w in N,N′-dimethylacetamide (DMAc).Variations in percent addition of fillers included 5%, 10%, 20%, and 30% w/w to observe gas separation performance. The produced PES/MIL-96 (Al) MMMs did not show any chemical interactions based on fourier transform infrared analysis. The fabricated membrane has a finger-like structure, as demonstrated by scanning electron microscopy images. Gas separation performance in MMMs was observed in N2, O2, and CO2 gases. Membrane permeability showed an increase as the number of fillers was increased. The optimum selectivity of the membranes for the separation of CO2/N2 and CO2/O2 gases was achieved with the addition of 20% fillers with increases of 155% and 86%, respectively, compared to pure PES membranes. Agglomeration was observed with the addition of 30% particle filler to the membranes, which resulted in decreased membrane selectivity.

Mixed matrix membranes (MMMs) could be a solution to combine the advantage of organic polymer and inorganic membrane for CO2 gas separation. In this research, MMMs based on poly-ether sulfone (PES) with various amounts addition of Metal–Organic Framework based on magnesium(II) and benzene 1,3,5- tricarboxylate [Mg3(BTC)2], as filler, have been prepared via phase inversion method. According to FTIR spectroscopy, the obtained MMMs show no chemical interaction between [Mg3(BTC)2] and PES. Post-synthesis sonication on [Mg3(BTC)2] resulted in 5 times smaller particle size and increased the surface area up to 8 times. The loading of [Mg3(BTC)2] slightly increases the thermal stability of the PES membrane up to 20 °C according to thermogravimetric analysis (TGA). High [Mg3(BTC)2] loading of 30 and 40 wt% resulting in particle agglomeration as depicted in scanning electron microscope (SEM) images. The value of CO2 permeability increased almost five times after loading of 20 wt% [Mg3(BTC)2] into PES, while the selectivity of CO2/N2 and CO2/O2 separation increased up to 200 and 150%, respectively.