A kind of preparation method and application of antibacterial nanofiltration membrane
A nanofiltration membrane and reaction liquid technology, applied in the field of separation membranes, can solve the problems of poor antibacterial performance of CA nanofiltration membranes, and achieve excellent antibacterial performance, high water flux, and strong antibacterial performance
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Embodiment 1
[0040] Step (1) Preparation of cyclodextrin polymer: 0.75g initiator 21Br-β-CD was dissolved in 30mL acetone, followed by adding 0.40mL (Me) 6 TREN, 13.2mL MMA and 9.0mL DMAEMA, stirred evenly, then bubbled with argon gas for 30min (deoxygenation), sealed the reaction bottle after bubbling, reacted for 12h, precipitated in ether / hexane, suction filtered, washed, To remove unreacted monomers, initiators and solvents; the product was vacuum-dried at 60°C for 30h; weighed 2.0g of the product and dissolved it in 40mL of ethanol, added 2.0mL of dodecyl bromide and reacted at 60°C for 48h, and the reaction solution was Concentrate, precipitate in ethyl acetate, filter with suction, wash, and finally the quaternized cyclodextrin polymer is vacuum-dried at 55°C for 48h;
[0041] According to the product (quaternized cyclodextrin polymer) 1 H NMR test result, this product is in δ=4.044ppm, δ=3.599ppm, δ=3.503ppm, δ=2.607ppm, δ=2.317ppm, δ=1.820ppm, δ=1.269ppm, δ=0.870ppm, δ= There is...
Embodiment 2
[0050] Step (1). Preparation of cyclodextrin polymer: Dissolve 0.75g initiator 21Br-β-CD in 28mL acetone, then add 8.0μL TMEDA, 13.2mL MMA and 9.0mL DMAEMA, stir well and pass nitrogen gas for 40min (deoxygenation) After the bubbling is completed, the reaction bottle is sealed well, and after 18 hours of reaction, it is precipitated in ether / hexane, filtered by suction, and washed to remove unreacted monomers, initiators and solvents; the product is vacuum-dried at 65°C for 24 hours; Dissolve 2.5g of the product in 48mL of ethanol, add 2.5mL of dodecyl bromide and react at 65°C for 40h, the reaction solution is concentrated, precipitated in ethyl acetate / hexane, filtered with suction, washed, and finally quaternized The cyclodextrin polymer was vacuum dried at 65°C for 28 hours;
[0051] According to the 1H NMR test results of the product (quaternized cyclodextrin polymer), the product is at δ=4.072ppm, δ=3.503ppm, δ=3.482ppm, δ=2.581ppm, δ=2.290ppm, δ =1.825ppm, δ=1.267ppm, ...
Embodiment 3
[0059] Step (1). Preparation of cyclodextrin polymer: 0.75g initiator 21Br-β-CD was dissolved in 26mL DMF, then 12.0μL PMDETA, 13.2mL MMA and 9.0mL DMAEMA were added, stirred evenly and then bubbled with argon for 25min ( Deoxygenation), after bubbling, seal the reaction bottle well, precipitate in ether / hexane after 24 hours of reaction, filter with suction, wash to remove unreacted monomers, initiators and solvents; the product is vacuum-dried at 50°C for 48 hours ; Weigh 2.5g of polymer and dissolve it in 48mL of methanol, add 2.5mL of hexadecyl bromide and react at 75°C for 30h, the reaction solution is concentrated, precipitated in ethyl acetate, suction filtered, washed, and finally quaternized The cyclodextrin polymer was vacuum-dried at 70°C for 30 hours;
[0060] According to the 1H NMR test results of the product (quaternized cyclodextrin polymer), the product is at δ=4.578ppm, δ=3.602ppm, δ=3.523ppm, δ=3.227ppm, δ=2.581ppm, δ =2.290ppm, δ=1.836ppm, δ=1.721ppm, δ=1....
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