Anti-pollution nanofiltration membrane based on tannic acid multi-layer assembly as well as preparation and application
A technology of layer-by-layer assembly and tannic acid, which is applied in the field of preparation of anti-pollution nanofiltration membranes, can solve the problems of single function and long time consumption, and achieve the effects of inhibiting deposition, ensuring uniformity and good retention performance
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[0039] A preparation of anti-pollution nanofiltration membrane, comprising the following steps:
[0040] Step 1, make the PSBMA solution that mass volume concentration is 60mg / L:
[0041] Step 1-1, synthesis of PSBMA zwitterionic polymer: 30 mg of sodium metabisulfite and 80 mg of ammonium persulfate were dissolved in a mixed solution of 5 mL of water and ethanol, and 1.8861 g of methacryloyl ethyl sulfobetaine was added thereto. After reacting at 38°C for 1 hour, place it in a refrigerator at -20°C to terminate the reaction; dialyze and freeze-dry the product to obtain PSBMA zwitterionic polymer, which is ready for use;
[0042] Step 1-2, prepare a phosphate buffer solution with a concentration of 10mmol / L and a pH value of 5, and set aside;
[0043] Step 1-3, dissolving the PSBMA zwitterionic polymer prepared in step 1-1 in the phosphate buffer prepared in step 1-2 to prepare a PSBMA solution with a mass volume concentration of 60 mg / L for future use.
[0044] Step 2, prep...
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