A polysulfone substance containing PEG, a preparation method of the substance, and a preparation method of a gas separation membrane containing the substance
A gas separation membrane and material technology, applied in chemical instruments and methods, semi-permeable membrane separation, membrane technology, etc., can solve the problems of low separation coefficient and high cost of methane gas separation, and achieve high selectivity and permeability, good dissolution and film-forming effects
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Embodiment 1
[0021] 0.00285mol of hexafluorobisphenol A, 0.003mol of 4,4-difluorodiphenyl sulfone, and 0.00015mol of PEG-1000 were charged into a 25mL three-necked flask equipped with a nitrogen vent and a condenser tube as reactants, Add anhydrous K 2 CO 3 As a catalyst, add N,N-dimethylacetamide as a solvent and toluene as a dehydrating agent, dehydrate at 130°C for 3 hours, distill the toluene, then raise the temperature to 175°C for 5 hours, then cool to room temperature to obtain a polymer melt , pour the polymer melt into a beaker filled with water while stirring to form a noodle-like precipitate, wash it with water several times, filter it, and dry it in an oven at 60°C to obtain a polysulfone substance containing PEG; take 0.5 The PEG-containing polysulfone substance of g is put into a beaker equipped with chloroform and a magnet, and a solution with a mass concentration of 10% is prepared under magnetic stirring, and the obtained solution is put into an ultrasonic cleaner, and ul...
Embodiment 2
[0028] 0.00285mol of hexafluorobisphenol A, 0.003mol of tetramethyl 4,4-difluorodiphenyl sulfone, and 0.00015mol of PEG-2000 were charged into a 25mL three-necked flask equipped with a nitrogen vent and a condenser tube as reactant, adding anhydrous K 2 CO 3 As a catalyst, add N,N-dimethylacetamide as a solvent and toluene as a dehydrating agent, dehydrate at 130°C for 3 hours, distill the toluene, heat up to 180°C for 5 hours, and then cool to room temperature to obtain a polymer melt. The polymer melt was poured into a beaker of water while stirring, forming a noodle-like precipitate. Wash with water several times, filter, and dry in an oven at 60°C to obtain PEG polysulfone. Take 0.5 g of PEG polysulfone material and put it into a beaker equipped with chloroform and magnets, configure a solution with a mass concentration of 5% under magnetic stirring, put the obtained solution into an ultrasonic cleaner, and ultrasonically for 15 minutes. After taking it out, Stand still...
Embodiment 3
[0035] Into a 25mL three-necked flask equipped with a nitrogen vent, a condenser and a magnet, put 0.002mol of hexafluorobisphenol A, 0.003mol of 4,4-difluorotriphenyldisulfone and 0.001mol of PEG-600 As a reactant, anhydrous SeCO was added 3As a catalyst, add N,N-dimethylformamide as a solvent and toluene as a dehydrating agent, dehydrate at 130°C for 3 hours, distill the toluene, heat up to 180°C for 5 hours, and then cool to room temperature to obtain a polymer melt. The polymer melt was poured into a beaker filled with water while stirring to form a noodle-like precipitate, which was washed with water several times, filtered, and then dried in an oven at 60°C to obtain PEG polysulfone. Take 0.5 g of PEG polysulfone material and put it into a beaker equipped with chloroform and magnets, configure a solution with a mass concentration of 15% under magnetic stirring, put the obtained solution into an ultrasonic cleaner, and ultrasonically for 15 minutes. After taking it out, ...
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