4.6 Article

Gas Transport Properties of the Metal-Organic Framework (MOF)Assisted Polymer of Intrinsic Microporosity (PIM-1) Thin-Film Composite Membranes

期刊

ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 9, 期 2, 页码 684-694

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.0c06297

关键词

mixed matrix membrane; metal-organic framework; polymers of intrinsic microporosity; gas separation; thin-film composite membrane; gas adsorption

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The study examines mixed matrix thin-film composite membranes consisting of metal-organic frameworks (MOFs) and a polymer of intrinsic microporosity (PIM-1), showing improved permeance and selectivity for H-2 and O-2 over N-2. It also indicates enhanced separation performance for CO2/CH4 in the prepared membranes, making them suitable for applications such as ammonia purge gas, oxygen enrichment, and acid gas treatment.
The current study summarizes the findings of singlegas transport performances of mixed matrix thin-film composite membranes consisting of metal-organic frameworks (MOFs) incorporated into a polymer of intrinsic microporosity (PIM-1). Mg-MOF-74, MIL-53, TIF SIX-3, and Zn-2(bim)(4) were investigated as stand-alone materials and as incorporated into the PIM-1 polymer matrix serving as a selective layer of thin-film composite membranes by various methods: Fourier-transform infrared spectroscopy, solidstate NMR, X-ray diffraction, thermogravimetric analysis, and scanning electron microscopy. The effect of MOF loading and nature on the mixed-matrix membrane morphology and operation were analyzed by varying the MOF content in the polymer matrix from 2 to 10 wt % with respect to the dry polymer weight. The results show that the incorporation of MOFs into the PIM-1 polymer matrix boosts the permeance and selectivity of H-2 and O-2 over N-2, and the prepared PIM-1/TIFSIX_4 mixed matrix membrane shows better separation performance for CO2/CH4 than pure PIM-1. Such membranes can be good candidates for ammonia purge gas, oxygen enrichment, and acid gas treatment applications.

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