In-situ self-assembled polymer nanoparticle reinforced separation membrane and preparation method thereof
A nanoparticle and polymer technology, applied in semi-permeable membrane separation, chemical instruments and methods, membranes, etc., can solve problems such as leakage of inorganic nanomaterials, decrease of membrane rejection rate, loss of water purification, etc., to improve hydrophilicity, Effect of improving permeability and good compatibility
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Embodiment 1
[0038] Add 5g of dry polyetheretherketone particles into 100mL of concentrated sulfuric acid, then stir at room temperature for 0.5 hours to obtain preliminary dissolution of polyetheretherketone, then raise the temperature to 60°C and continue stirring for 30 hours. After the reaction, the solution was poured into an ice-water bath, and then washed with deionized water until the pH value of the eluate was close to 7, and finally dried in a vacuum oven at 80°C to obtain sulfonated polyether ether ketone.
[0039] figure 1 The proton magnetic spectrum of sulfonated polyether ether ketone is given, from which the degree of sulfonation can be calculated, and the degree of sulfonation is about 94%.
Embodiment 2
[0041] 0.51% (0.0336g) of sulfonated polyetheretherketone and 0.51% (0.0336g) of branched polyethyleneimine (M n =1800g / mol) are respectively dissolved in the polyethersulfone containing 17% (1.1200g) by weight, the polyvinylpyrrolidone of 5% (0.3294g) by weight, and the N-methylpyrrolidone solution of 77.49% (5.1052g) by weight . After complete dissolution, the two solutions were mixed together and stirring was continued for 8 hours. Then the mixed casting solution was degassed in an oven at 50° C. for 4 hours. Finally, the casting solution cooled to room temperature was poured onto a clean glass plate, and then the film was scraped with a scraper knife with a 200 μm air groove, and then the glass plate loaded with the casting solution was placed in deionized water. Deionized water will be replaced several times afterwards to remove the residual porogen and solvent in the membrane, so that the polyethersulfone membrane substrate is 100 parts by weight, and the polymer nanop...
Embodiment 3
[0047] 0.51% (0.0336g) of sulfonated polyetheretherketone and 0.51% (0.0336g) of branched polyethyleneimine (M n =600g / mol) respectively dissolved in the polyethersulfone containing 17% (1.1200g) by weight, the polyvinylpyrrolidone of 5% (0.3294g) by weight, and the N-methylpyrrolidone solution of 77.49% (5.1052g) by weight . After complete dissolution, the two solutions were mixed together and stirring was continued for 8 hours. Then the casting solution was placed in an oven at 50° C. for degassing for 4 hours. Finally, the casting solution cooled to room temperature was poured onto a clean glass plate, and then the film was scraped with a scraper knife with a 200 μm air groove, and then the glass plate loaded with the casting solution was placed in deionized water. In order to completely remove the solvent and porogen, the deionized water was changed several times afterwards. Similarly, a separation membrane was prepared by assembling polyethyleneimine with a number aver...
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Abstract
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