A preparation method of polyarylether microporous membrane with adjustable pore size
A polyarylene ether and microporous membrane technology, applied in the field of microporous membrane preparation, can solve the problems of complex production process steps, complex raw materials and equipment, large organic waste water, etc., and achieves cheap and recyclable preparation raw materials, high temperature tolerance, Effects with few influencing factors
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Embodiment 1
[0022] Reduced phenolphthalein (3.2034 g, 0.0100 mol), 2,6 difluorobenzonitrile (1.4049 g, 0.0101 mol) and potassium carbonate (4.1463 g, 0.0300 mol), and NMP (13.4 mL) were added with a nitrogen vent, Put the stirring paddle into a 50mL three-necked flask with a water dispenser and a condenser tube, then add 5mL of toluene, turn on the stirring paddle, stir for 1h in the presence of nitrogen flow, and exhaust the air. Then the temperature was raised to 142°C with water for 3 hours, after the end of the water, toluene was released, the temperature was raised to 180°C for 2.5 hours of polymerization reaction, and the product was discharged in a 1mol / L dilute hydrochloric acid solution to obtain a filamentous crude product. The polymer is washed with deionized water until it is neutral, and then crushed and filtered by a powder machine; the solid product is boiled in distilled water, filtered, and the process of boiling and filtering in distilled water is repeated 5 times; then b...
Embodiment 2
[0024] 1.0 g of the polymer (PENCOOH) obtained in Example 1 was dissolved in 10.0 mL of DMF solvent and stirred for 4 hours. After ensuring that the polymer was completely dissolved, 0.0500 g of α-cyclodextrin was added and stirred at room temperature for 24 hours to make the α-cyclodextrin Dextrin is uniformly dispersed in the polymer solution, and then filtered through a filter cloth, cast on a 10cm×10cm horizontal glass plate, and placed in an oven at 60°C, 80°C, and 100°C for 2 hours each, and most of the solvent in the casting solution After drying out, dry at 120° C. under vacuum for 24 hours to obtain a flat polymer film. After taking out the membrane, soak it in water to remove the membrane, place the membrane in a Soxhlet extractor, extract it with deionized water for 12 hours, and dry it in a vacuum oven at 120°C to obtain a microporous membrane (average pore size: 14.73 μm).
Embodiment 3
[0026] Dissolve 0.010g of α-cyclodextrin in 100mL of DMF solvent, and after 12 hours to be uniformly dispersed, take 10.0mL of the mixed solution, add 1.0g of polymer (PENCOOH) and stir for 24 hours, so that glucose and polymer are uniformly dispersed in the solution, Then filter through filter cloth, cast on a 10cm×10cm horizontal glass plate, put in an oven at 60°C, 80°C, and 100°C for 2 hours each, after most of the solvent in the casting liquid is baked out, then vacuum bake at 120°C for 24 Hours to obtain a flat polymer film. After taking out the membrane, soak it in water to remove the membrane, place the membrane in a Soxhlet extractor, extract it with deionized water for 12 hours, and dry it in a vacuum oven at 120°C for 24 hours to obtain a microporous membrane (average pore size of 1.00 μm).
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