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Preparation method of antibacterial water softening nanofiltration membrane and antibacterial water softening nanofiltration membrane prepared by preparation method

A nanofiltration membrane and antibacterial water technology, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of easy loss, poor dispersion of inorganic antibacterial particles, and long antibacterial modification treatment time and other issues to achieve the effect of improving antibacterial performance

Active Publication Date: 2020-07-17
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above method can improve the antibacterial properties of the surface of the nanofiltration membrane, there are many shortcomings, such as the poor dispersion of the introduced inorganic antibacterial particles and easy loss during actual use, and the long processing time required for the antibacterial modification process , The general antibacterial effect of the film and other shortcomings

Method used

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  • Preparation method of antibacterial water softening nanofiltration membrane and antibacterial water softening nanofiltration membrane prepared by preparation method
  • Preparation method of antibacterial water softening nanofiltration membrane and antibacterial water softening nanofiltration membrane prepared by preparation method
  • Preparation method of antibacterial water softening nanofiltration membrane and antibacterial water softening nanofiltration membrane prepared by preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) The polysulfone ultrafiltration membrane supported by non-woven fabric is fixed, and the prepared first aqueous phase solution containing 1.5wt% piperazine and 1.0wt% trisodium phosphate is poured on the surface of the ultrafiltration membrane, soaked for 2min, poured After removing the first aqueous phase solution, use a rubber roller to remove the residual solution on the surface of the ultrafiltration membrane, and dry until there are no visible droplets on the surface of the membrane;

[0051] (2) pour the prepared Isopar G oil phase solution containing 0.2wt% trimesoyl chloride on the surface of the ultrafiltration membrane, so that the base film is completely immersed in the oil phase solution, and carry out an interfacial polymerization reaction at room temperature, the reaction time After pouring off the oil phase solution, use an air knife or an air knife to evenly sweep the surface of the membrane until there is no residual liquid;

[0052] (3) Pour the pr...

Embodiment 2

[0054] The main difference between this example and Example 1 is that the concentrations of PAMAM and DPPG in the second aqueous phase solution in the step (3) are 0.2wt% and 0.02wt%, respectively.

Embodiment 3

[0056] The main difference between this example and Example 1 is that the concentrations of PAMAM and DPPG in the second aqueous phase solution in step (3) are 0.6wt% and 0.06wt%, respectively.

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Abstract

The invention provides a preparation method of an antibacterial water softening nanofiltration membrane and the antibacterial water softening nanofiltration membrane prepared by the preparation method, and the preparation method comprises the following steps: (1) dipping a base membrane in a mixed aqueous solution of piperazine and an acid acceptor, and then separating and removing a liquid on thesurface of the membrane, (2) immersing the base membrane treated in the step (1) into a trimesoyl chloride oil-phase solution to carry out primary interfacial polymerization reaction, and then separating and removing a liquid on the surface of the membrane to obtain a nascent state membrane, and (3) immersing the nascent state membrane obtained in the step (2) into a mixed aqueous solution of PAMAM and synthetic phospholipid to carry out secondary interfacial polymerization, then separating the liquid, drying and washing with water to obtain the antibacterial water softening nanofiltration membrane. The prepared nanofiltration membrane can significantly improve the antibacterial performance, has a lasting and effective antibacterial effect, and is safe and environment-friendly. Meanwhile,the interception performance on divalent cations can be remarkably improved, the taste of purified water is effectively improved, and the application prospect in domestic water purification and municipal drinking water advanced treatment is very wide.

Description

technical field [0001] The invention belongs to the technical field of water treatment membranes, and in particular relates to a preparation method of an antibacterial water softening nanofiltration membrane and an antibacterial water softening nanofiltration membrane prepared therefrom. Background technique [0002] Nanofiltration is a pressure-driven membrane separation process between reverse osmosis and ultrafiltration. The core of nanofiltration technology is nanofiltration membrane. The largest application field of nanofiltration membrane is the softening of drinking water and the removal of organic matter. With the improvement of living standards and the increasingly serious environmental pollution, people are more and more concerned about the quality of drinking water. Traditional drinking water treatment mainly removes suspended solids and bacteria in water through flocculation, sedimentation, sand filtration and chlorination disinfection, but the removal rate of so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/02B01D69/12B01D71/56B01D61/02C02F1/44C02F101/20C02F101/30
CPCB01D71/56B01D69/02B01D69/125B01D61/027C02F1/442C02F2101/30C02F2101/20B01D2325/48
Inventor 孔新阚红强全晓赵永锋赵伟国孙家宽
Owner WANHUA CHEM GRP CO LTD