This paper, which was completed by a research scholar at Taiyuan Institute of Technology, discusses papers on the film formation of MOF-5/PI mixed matrix membranes and is published in the important journal .

The MOF-5/PI mixed matrix membrane with smooth surface and high mechanical strength was prepared by solution blending method with MOF-5 crystal and polyimide precursor solution as raw materials. The effects of MOF-5 content and polyimide precursor concentration on the structure and properties of MOF-5/PI mixed matrix membrane were investigated by PLM, SEM and tensile tester. The results show that the mechanical properties of MOF-5/PI mixed matrix membranes are best when the addition amount of MOF-5 crystal is 5% and the concentration of polyimide precursor solution is 0.75mol/L.

50 mL of DMF was weighed in a three-necked flask, and 3.594 g of Zn(NO3)2·6H2O was dissolved in DMF, and then 1.004 g of H2BDC was added, and the mixed solution was shaken in an ultrasonic oscillator for 30 minutes to dissolve it uniformly; The three-necked flask was placed in a microwave-assisted synthesizer, the power of the microwave oven was 300 W, the reaction temperature was 130 ° C, and the reaction time was 30 min. The flask was placed in the air and naturally cooled to room temperature, filtered, and washed repeatedly with anhydrous ethanol for 3 to 4 times. The guest molecule DMF adsorbed in the product was removed; the precipitated crystals were dried in a constant temperature drying oven at 80 ° C for 4 hours to obtain MOF-5 crystals.