A kind of ultrafiltration polyethylene porous membrane for water treatment and its preparation process

A preparation process, polyethylene technology, applied in water/sewage treatment, water/sludge/sewage treatment, osmotic/dialysis water/sewage treatment, etc., can solve problems such as performance degradation, permanent defects, performance degradation, etc. Long antibacterial life, high practicability, tightly combined effect

Active Publication Date: 2022-04-22
JIANGSU HORIZON NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, various impurities in the wastewater will adhere and deposit on the surface of the ultrafiltration membrane, resulting in a smaller pore size and lower performance of the ultrafiltration membrane, and bacteria, fungi and other microorganisms will be enriched on the surface of the ultrafiltration membrane, and then breed. , causing damage to the ultrafiltration membrane itself, resulting in permanent defects, and a substantial drop in performance. Therefore, at present, it is urgent to propose an ultrafiltration membrane with excellent antibacterial effect and outstanding bactericidal ability.

Method used

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  • A kind of ultrafiltration polyethylene porous membrane for water treatment and its preparation process

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Embodiment 1

[0049] A preparation process of ultrafiltration polyethylene porous membrane for water treatment, comprising the following steps:

[0050] S1: polyethylene cross-linking treatment, loaded with spherical nano-copper, to obtain material A;

[0051] S2: Grafting 5,5-dimethylhydantoin on the surface of material A to prepare material B, and reacting material B in dichloropropanol and sodium hydroxide solution to prepare cross-linked polyethylene;

[0052] S3: surface-treat nano-titanium dioxide with sodium laurate, and coat nano-titanium dioxide with quaternary ammonium chitosan to prepare chitosan antibacterial salt;

[0053] S4: Stir cross-linked polyethylene and chitosan antibacterial salt, and ultrasonically disperse to obtain material C;

[0054] S5: Melting and blending the material C and paraffin, casting, stretching, removing paraffin, and heat treatment to obtain a polyethylene ultrafiltration membrane.

[0055] Among them, S1:

[0056] (1) Soak polyethylene in acetone ...

Embodiment 2

[0068] A preparation process of ultrafiltration polyethylene porous membrane for water treatment, comprising the following steps:

[0069] S1: polyethylene cross-linking treatment, loaded with spherical nano-copper, to obtain material A;

[0070] S2: Grafting 5,5-dimethylhydantoin on the surface of material A to obtain substance B, and reacting substance B in dichloropropanol and sodium hydroxide solution to obtain cross-linked polyethylene;

[0071] S3: surface-treat nano-titanium dioxide with sodium laurate, and coat nano-titanium dioxide with quaternary ammonium chitosan to prepare chitosan antibacterial salt;

[0072] S4: Stir cross-linked polyethylene and chitosan antibacterial salt, and ultrasonically disperse to obtain material C;

[0073] S5: Melting and blending the material C and paraffin, casting, stretching, removing paraffin, and heat treatment to obtain a polyethylene ultrafiltration membrane.

[0074] Among them, S1:

[0075] (1) Soak polyethylene in acetone ...

Embodiment 3

[0087] A preparation process of ultrafiltration polyethylene porous membrane for water treatment, comprising the following steps:

[0088] S1: polyethylene cross-linking treatment, loaded with spherical nano-copper, to obtain material A;

[0089] S2: Grafting 5,5-dimethylhydantoin on the surface of material A to obtain material B, and reacting material B in dichloropropanol and sodium hydroxide solution to obtain cross-linked polyethylene;

[0090] S3: modify the surface of nano-titanium dioxide with sodium laurate, and coat nano-titanium dioxide with quaternary ammonium chitosan to prepare chitosan antibacterial salt;

[0091] S4: Stir cross-linked polyethylene and chitosan antibacterial salt, and ultrasonically disperse to obtain material C;

[0092] S5: Melting and blending the material C and paraffin, casting, stretching, removing paraffin, and heat treatment to obtain a polyethylene ultrafiltration membrane.

[0093] Among them, S1:

[0094] (1) Soak polyethylene in ac...

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Abstract

The invention discloses an ultrafiltration polyethylene porous membrane for water treatment and a preparation process thereof. The ultrafiltration polyethylene porous membrane is mainly made of polyethylene, spherical nano-copper, 5,5-dimethylhydantoin, dichloropropanol, sodium hydroxide, quaternary ammonium chitosan, nano-titanium dioxide, and sodium laurate. The ultrafiltration polyethylene porous membrane disclosed by the present invention has excellent antibacterial and antibacterial properties. By adjusting the reaction temperature, 5,5-dimethylhydantoin, dichloropropanol, and sodium hydroxide can achieve multiple reactions to generate 3- (3‑Chloro‑2‑hydroxypropyl)‑5,5‑dimethylhydantoin and quaternary ammonium groups play a synergistic bactericidal effect, and also generate 5,5‑dimethylhydantoin epoxide, which is coated on The polyethylene surface makes the spherical nano-copper and polyethylene more tightly combined. The spherical nano-copper is not easy to fall off when the polyethylene porous membrane is used, and it can be recycled, with long antibacterial life and high practicability.

Description

technical field [0001] The invention relates to the technical field of ultrafiltration porous membranes, in particular to an ultrafiltration polyethylene porous membrane for water treatment and a preparation process thereof. Background technique [0002] With the increasingly serious water pollution, the problem of water treatment has also been put on the agenda. Simple physical treatment is difficult to filter out various impurities in wastewater, and the treatment effect is not good. It is difficult to avoid complex chemical treatment. It is difficult to clean the secondary pollution by introducing new ions. Membrane treatment method has become a better treatment solution in wastewater treatment, which can not only filter impurities at a deeper level, but also avoid secondary chemical pollution. [0003] However, various impurities in the wastewater will adhere and deposit on the surface of the ultrafiltration membrane, resulting in a smaller pore size and lower performanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/14B01D69/12B01D71/26C02F1/44C02F1/50
CPCB01D61/145B01D71/26B01D69/125C02F1/444C02F1/50B01D2325/48B01D2323/345B01D2323/46B01D2323/30B01D2323/12
Inventor 翁星星李正林陈朝晖盛夏
Owner JIANGSU HORIZON NEW ENERGY TECH CO LTD
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