3 research outputs found
Exploring the effect of iron metal-organic framework particles in polylactic acid membranes for the azeotropic separation of organic/organic mixtures by pervaporation
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 tert-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
Mise au point et caractérisation de membranes perméables et sélectives en vue de séparer des mélanges gazeux alcanes / alcènes
ROUEN-BU Sciences Madrillet (765752101) / SudocSudocFranceF