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Preparation method of antibacterial anti-pollution filtering membrane

A filter membrane and anti-pollution technology, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve the problems of complex operation, high cost, and poor controllability of surface properties of antibacterial and anti-pollution filter membranes, and achieve good anti-pollution performance , low price and low manufacturing cost

Active Publication Date: 2021-06-01
HAINAN LITREE PURIFYING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing an antibacterial and anti-pollution filter membrane with simple operation, long-lasting effect and controllable surface properties, so as to solve the problem of complicated operation, high cost and easy loss of effect of the antibacterial and anti-pollution filter membrane in the prior art. The problem of poor controllability of surface properties

Method used

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  • Preparation method of antibacterial anti-pollution filtering membrane
  • Preparation method of antibacterial anti-pollution filtering membrane
  • Preparation method of antibacterial anti-pollution filtering membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]Preparation of antibacterial anti-polluting filtration membrane (M1): 10.5 g of polyether sulfone, 4.5 g of polyethylene imine and 15 g of polyethylene glycol (molecular weight 1000) were dissolved in 70 g n, N-dimethylacetamide, at 60 Stir at ° C for 8 h and stand staked. The film formation liquid was applied to a clean glass plate surface with a doctor having a thickness of 250 microns, followed by immersing in water, cured to obtain a positive electro-hydrophilic membrane (M1-a). Putting the positive electro-hydrophil undermeal is placed in aqueous methacrylic acid (2 g / l) aqueous solution, and in the ultraviolet lamp (the main wavelength of the ultraviolet light is 290-400 nm, the power is 100 watts, the film and the ultraviolet lamp distance 5cm) 3 min was obtained by filtration membrane (M1-3); irradiation 4min, resulting in a filter film (M1-4); irradiation 6min, obtained by filter film (M1-6); irradiation 12min, obtained filter film M1-12.

[0034]Characterization metho...

Embodiment 2-23

[0039]Preparation conditions As with Table 1, characterization results are shown in Schedule 2.

[0040]The results showed that the load-bearing unit was successfully grafted to the surface of the positive electro-hole under film by ultraviolet irradiation, and as the graft time increased, the pore size of the filter membrane was small, the flux decreased, and the surface chargeability was gradually. Reduce, the flux retention rate is gradually increased, and the bactericidal performance is gradually decreased; when the grafting time is too long, the surface of the surface is bulging, the sterilization performance has dropped sharply, and the anti-pollution performance also shows a decline. For example, M2-120, M3-80 and M-20, due to the too long of UV grafting time, the amount of grafting of the lotion of the load is too high, resulting in a significant lotion, anti-pollution and antibacterial properties.

[0041]1-23 Preparation of conditional data

[0042]

[0043]

[0044]

[0045]Figure 2 Exampl...

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Abstract

The invention discloses a preparation method of an antibacterial anti-pollution filtering membrane. The preparation method mainly comprises the following specific steps: (1) dissolving a polymer material, a positively charged additive and a pore-foaming agent in a solvent to obtain a uniform and stable membrane preparation solution; (2) performing non-solvent induced phase separation on the membrane preparation liquid obtained in the step (1) to form a positively charged microporous base membrane; and (3) putting the positively charged microporous base membrane obtained in the step (2) into a negatively charged monomer solution, and conducting irradiating under an ultraviolet lamp to obtain the antibacterial anti-pollution filtering membrane. By regulating and controlling grafting conditions, when the zeta potential of the surface of the filtering membrane is 0.5-15.0 mV, the filtering membrane shows excellent antibacterial and anti-pollution performance. The method has a modification means which is simple and convenient to operate, lasting in effect and controllable in surface property.

Description

Technical field[0001]The present invention belongs to the field of membrane, and in particular, the present invention relates to a method of preparing an antibacterial anti-contaminated filter membrane.Background technique[0002]Membrane separation technology is a function of separation, purification, concentration and purification, but also high efficiency, energy saving, environmental protection, separation accuracy, easy integration, etc., is widely used in water treatment, chemical, environmental, food, medicine and other fields. . The filter membrane is used in use, which is easily contaminated in water, including natural organic matter, sugar, protein, etc., resulting in irreversible adsorption of contaminants on the surface of the filter membrane and its apertures, resulting in a decrease in the performance of the filter membrane; in addition, processing In the process, the microorganisms such as bacteria in the water body are adhered to the surface of the filter membrane and ...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/02
CPCB01D67/0006B01D69/02B01D2325/48B01D2323/345Y02W10/10
Inventor 朱宝库方立峰肖玲王纳川赵斌王俊陈忱陈清陈良刚
Owner HAINAN LITREE PURIFYING TECH CO LTD
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