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چکیده
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tPoly(vinylidene fluoride) (PVDF) based mixed matrix membranes (MMMs) comprising crys-talline structures of Metal organic frameworks (MOFs), CuBTC, CuBDC, MIL-53(Al) andNH2-MIL-53(Al) were fabricated and investigated for gas separation applications. MOFs andmembranes were extensively characterized by FT-IR, XRD, SEM and TGA techniques. 10 wt%loading of CuBTC in PVDF showed 43.6 and 118.7% permeability enhancement for He andCO2gases compared to the pure membrane. Moreover, the high selectivity enhancement of96% was observed for CO2/CH4. In regards to CuBDC, 37.5 and 117% permeability increasefor He and CO2gases was reported for 15% loading. Furthermore, the best selectivity wasrelated to CO2/CH4in which 109.3% increscent was achieved relative to the pure membrane.Since CuBTC and CuBDC exhibited interesting effects on CO2transport, they can be promis-ing additives for polymer membranes. The membranes containing 10% wt of NH2-MIL-53(Al)showed 11.25 and 22.41% selectivity enhancement for He/CH4and CO2/CH4. However, forthose membranes containing MIL-53(Al), were decreased by 3.33 and 1.33% compared tothe pure PVDF membrane. The different behavior of NH2-MIL-53(Al) and MIL-53(Al) can beexplained by their different surface properties related to the existence of amino groups onNH2-MIL-53(Al).
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