Anti-pollution degerming nanofiber filter membrane and preparation method thereof
A technology of nanofiber and filter membrane, which is applied in the field of anti-fouling and degerming nanofiber filter membrane and its preparation, which can solve the problems of large molecular chain spacing, reduced flux and anti-pollution performance, and failure to meet the sterilization requirements of high-end fields. , to achieve the effects of improving mechanical strength, green environmental protection, realizing large-scale production, and easy realization of large-scale production
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[0045] A preparation method of the above-mentioned antifouling and degerming nanofiber filter membrane, comprising the following steps:
[0046] S1. Prepare polyvinyl alcohol-ethylene copolymer nanofibers by melt blending phase separation method;
[0047] S2. Disperse the nanofibers obtained in step S1 in a mixed solution of isopropanol and deionized water with a mass ratio of 1:1, and stir evenly to obtain a polyvinyl alcohol-ethylene copolymer with a mass concentration of 5% to 20%. Suspension of nanofibers;
[0048] S3. Coating the polyvinyl alcohol-ethylene copolymer nanofiber suspension obtained in step S2 on a nonwoven fabric substrate, and drying at room temperature to obtain a nanofiber-coated filter membrane;
[0049] S4. The solution of the above-mentioned first grafting compound and / or the second grafting compound is soaked and adsorbed or coated on the surface of the nanofiber coating filter membrane obtained in step S3, and dried at room temperature;
[0050] S5...
Embodiment 1
[0056] An antifouling and degerming nanofiber filter membrane is prepared through the following steps:
[0057] S1. Prepare PVA-co-PE nanofibers by melt blending phase separation method, that is, blend and melt spin PVA-co-PE and cellulose acetate butyrate (CAB) to obtain composite fibers, and then use acetone to dissolve and extract the composite fibers. CAB in the fiber to obtain PVA-co-PE nanofibers with a diameter of 150nm;
[0058] S2. Disperse the PVA-co-PE nanofibers obtained in step S1 in a mixed solution of isopropanol and deionized water with a mass ratio of 1:1, and stir evenly to obtain PVA-co-PE with a mass concentration of 10%. PE nanofiber suspension;
[0059] S3. Coating the PVA-co-PE nanofiber suspension obtained in step S2 on a polypropylene nonwoven fabric substrate with an average pore size of 10 μm, and drying at room temperature to obtain a nanofiber-coated filter membrane; wherein , the thickness of the PVA-co-PE nanofiber coating is 6μm, and the avera...
Embodiment 2
[0064] An antifouling and degerming nanofiber filter membrane, compared with Example 1, the difference is that step S4 is: the first graft compound with the following structural formula is prepared into a solution with a mass concentration of 10%, and then The nanofiber coating filter membrane obtained in step S3 is soaked in the solution for 30 minutes, and dried at room temperature;
[0065]
[0066] Others are substantially the same as in Embodiment 1, and will not be repeated here.
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