Msahel Asma, Galiano Francesco, Pilloni Martina, Russo Francesca, Hafiane Amor, Castro-Muñoz Roberto, Kumar Vijay Bhooshan, Gedanken Aharon, Ennas Guido, Porat Ze'ev, Scano Alessandra, Hamouda Sofiane Ben, Figoli Alberto
Laboratory of Water Membrane and Environmental Biotechnology (LMBE), CERTE BP 273, 8020 Soliman, Tunisia.
Department of Chemistry, University of Tunis El-Manar, Farhat Hached University Campus, BP n° 94 Rommana, 1068 Tunis, Tunisia.
Membranes (Basel). 2021 Jan 18;11(1):65. doi: 10.3390/membranes11010065.
A microporous carboxylate metal-organic framework MIL-100 Fe was prepared as submicron particles by microwave-assisted hydrothermal synthesis (Fe-MOF-MW). This product was explored, for the first time, for the preparation of polylactic acid (PLA) mixed matrix membranes. The produced MOF was characterised by powder X-ray diffraction (PXRD), environmental scanning electron microscopy (ESEM) as well as by thermogravimetric analysis (TGA) and nitrogen adsorption/desorption. The effect of different Fe-MOF-MW concentrations (0.1 and 0.5 wt%) on the membrane properties and performance were evaluated. These membranes were used in the pervaporation process for the separation of methanol/methyl -butyl-ether mixtures at the azeotropic point. The influence of the feed temperature and vacuum pressure on the membrane performance was evaluated and the results were compared with PLA pristine membranes. Moreover, the produced membranes have been characterised in terms of morphology, MOF dispersion in the polymeric membrane matrix, wettability, thickness, mechanical resistance and swelling propensity. The presence of Fe-MOF-MW was found to have a beneficial effect in improving the selectivity of mixed matrix membranes towards methanol at both concentrations. The highest selectivity was obtained for the PLA membranes embedded with 0.5 wt% of Fe-MOF-MW and tested at the temperature of 25 °C and vacuum pressure of 0.09 mbar.
通过微波辅助水热合成法（Fe-MOF-MW）制备了亚微米级颗粒的微孔羧酸盐金属有机骨架MIL-100 Fe。首次探索了该产物用于制备聚乳酸（PLA）混合基质膜。通过粉末X射线衍射（PXRD）、环境扫描电子显微镜（ESEM）以及热重分析（TGA）和氮气吸附/脱附对所制备的金属有机骨架进行了表征。评估了不同Fe-MOF-MW浓度（0.1和0.5 wt%）对膜性能和性能的影响。这些膜用于渗透汽化过程，以分离共沸点的甲醇/甲基丁基醚混合物。评估了进料温度和真空压力对膜性能的影响，并将结果与纯PLA膜进行了比较。此外，还对所制备的膜的形态、金属有机骨架在聚合物膜基质中的分散性、润湿性、厚度、机械抗性和溶胀倾向进行了表征。发现在两种浓度下，Fe-MOF-MW的存在都对提高混合基质膜对甲醇的选择性具有有益作用。对于嵌入0.5 wt% Fe-MOF-MW并在25℃温度和0.09 mbar真空压力下测试的PLA膜，获得了最高的选择性。
