ZIF-8-contained mixed matrix membrane as well as preparation and application thereof
A mixed matrix membrane, ZIF-8 technology, applied in membrane, membrane technology, semi-permeable membrane separation and other directions, can solve the problems of plasticization, gas separation performance reduction, etc. high volume effect
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Embodiment 1
[0033] Add 0.11 g of ZIF-8 nanoparticles into 5 mL of toluene solvent, stir to dissolve completely and evenly disperse. Take 1 gram of PEGDA-400 polymer, first add 0.1 gram of PEGDA-400 and 0.001 gram of benzoin dimethyl ether into the above solution, stir and disperse evenly. Add 0.9 g of PEGDA-400 into the solution and disperse evenly. Then, nitrogen was used to slowly purge excess toluene in the polymer solution (purge while stirring), and when nearly 1 gram of toluene remained, the purge was terminated. Then stand for degassing, pour the casting solution on the PAN ultrafiltration membrane, put it in the ultraviolet crosslinking apparatus to solidify for 2 minutes to form a solid film, and then soak it in toluene for 1 day. Then put it into a vacuum drying oven, vacuumize at 30°C for 12h, then raise the temperature to 70°C and dry for 12h, further remove the residual solvent, and finally obtain a mixed matrix film with a mass fraction of ZIF-8 of 10%, and a film thickness...
Embodiment 2
[0037] 0.11, 0.43, and 4.0 g of ZIF-8 were uniformly dispersed in three 10 mL portions of ethanol, respectively. Take three parts of 1 gram of PEGDA-600 polymer, first add 0.05 gram of PEGDA-600 and 0.005 gram of HCPK into the above solution, stir and disperse evenly. Add 0.95 g of PEGDA-600 into the solution and disperse evenly. Then, nitrogen was used to slowly purge excess ethanol in the polymer solution (purge while stirring), and when nearly 1 gram of ethanol remained, the purge was terminated. Then, the casting solution is obtained after static defoaming. Pour three parts of the casting solution on the PAN ultrafiltration membrane, irradiate with ultraviolet cross-linking method for 5 minutes to form a solid film, and then soak it in toluene for 1 day; then put it in a vacuum drying oven and vacuumize it at 45°C for 36 hours. Then the temperature was raised to 80° C. and dried for 36 hours to further remove the residual solvent, and finally obtained ZIF-8 / cross-linked ...
Embodiment 3
[0042] Add 3 parts of 0.43 g of ZIF-8 nanoparticles into 6 parts of 10 mL of chloroform solvent, stir to completely dissolve and evenly disperse. Take 1 gram of three organic polymers (PEGMEM, PEGMEA and PEGDMA), add 0.2 gram of organic polymer and 0.005 gram of HHMP into the above ZIF-8 solution, and disperse evenly. Then the remaining 0.8 g of organic polymer was added to the above solution and dispersed evenly. The solution was then slowly purged with nitrogen to remove excess chloroform (purging while stirring), until the chloroform volatilized to nearly 1 g, the purging was terminated. Then, static defoaming was carried out to obtain a uniform solution. The solution was coated on the PAN ultrafiltration membrane by knife coating. The method of ultraviolet crosslinking was irradiated for 30 minutes to make a solid film, and then soaked in chloroform for 1 day; then put it in a vacuum drying oven, evacuated at 60°C for 24h, and then dried at 100°C for 24h to further remov...
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