Method for modifying hydroophilicity of highly active separation membrane made from polymer
A separation membrane and polymer technology, applied in chemical instruments and methods, semi-permeable membrane separation, membrane technology, etc., can solve the problems of poor hydrophilicity, complexity and easy contamination of polymer separation membranes
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Embodiment 1
[0019] Step 1: Take a required amount of polypropylene hollow fiber microfiltration membrane with a porosity of about 40% and an average pore diameter of 0.07 micron, and wash it with acetone for 3 times to remove impurities adsorbed on the membrane surface. The treated membrane was vacuum-dried at room temperature for 3 hours and set aside. Dissolve the required amount of allyl glucose in dimethylformamide to make solutions with different concentrations. Take the required amount of microfiltration membrane washed with acetone and immerse in the allyl glucose solution overnight, then take out the microfiltration membrane, evaporate the solvent under normal pressure at 30 ° C, and obtain the grafted monomer (glycosyl Compound) microfiltration membrane;
[0020] Step 2, placing the monomer-coated microfiltration membrane in the chamber of the plasma processing machine, vacuuming, and adjusting the vacuum degree to 60 Pa by passing nitrogen gas. Turn on the power supply of the ...
Embodiment 2
[0023] Step 1, take a required amount of polyethylene hollow fiber microfiltration membrane (porosity about 55%, average pore diameter 0.25 micron), wash 3 times with acetone, to remove impurities adsorbed on the membrane surface. The treated membrane was vacuum-dried at room temperature for 3 hours and set aside. Dissolve the required amount of allyl galactose in dimethylformamide to make a solution with the required concentration. Weigh the required amount of polyethylene hollow fiber microfiltration membrane washed with acetone and immerse in the allyl sucrose solution overnight, then take out the polyethylene hollow fiber microfiltration membrane, and evaporate the solvent at 30°C under normal pressure.
[0024] Step 2, placing the monomer-coated polyethylene hollow fiber microfiltration membrane in a corona treater, turning on the power of the treater, and performing corona radiation treatment. After irradiating for a period of time, turn off the power, take out the memb...
Embodiment 3
[0026] Step 1, take the required amount of polyethersulfone ultrafiltration membrane (molecular weight cut off is 50000Dalton), and wash it with acetone for 3 times to remove the impurities adsorbed on the surface of the membrane. The treated membrane was vacuum-dried at room temperature for 3 hours and set aside. Dissolve the required amount of glucose ethoxy acrylate in deionized water to prepare solutions with different concentrations. Weigh the required amount of polyethersulfone ultrafiltration membrane washed with acetone and immerse it in the glucose ethoxy acrylate solution overnight, then take out the polyethersulfone ultrafiltration membrane and dry it at room temperature.
[0027] Step 2, the polyethersulfone ultrafiltration membrane coated with monomer is placed in a metered 5-35kGy 60 Gamma-ray radiation treatment was carried out in a Co source. After a period of irradiation, the polyethersulfone ultrafiltration membrane was removed from 60The Co source was tak...
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