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Antibacterial ultrafiltration membrane, preparation method thereof and membrane regeneration method

A technology of ultrafiltration membrane and repeating unit, which is applied in the field of antibacterial ultrafiltration membrane and its preparation, can solve the problems of drug resistance, easy loss, and easy harm to the environment, and achieve high sterilization, environmental friendliness, and good filtration The effect of separation performance

Active Publication Date: 2016-02-03
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Containing metal and oxidized metal antibacterial agents are easy to lose during use, the antibacterial performance is reduced and it is easy to cause harm to the environment
Antibacterial films containing quaternary ammonium salts are prone to drug resistance after long-term use, reducing their antibacterial properties

Method used

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  • Antibacterial ultrafiltration membrane, preparation method thereof and membrane regeneration method
  • Antibacterial ultrafiltration membrane, preparation method thereof and membrane regeneration method
  • Antibacterial ultrafiltration membrane, preparation method thereof and membrane regeneration method

Examples

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preparation example Construction

[0031] The present invention provides a kind of preparation method of antibacterial ultrafiltration membrane described in above-mentioned technical scheme, comprises the following steps:

[0032] The ultrafiltration membrane is obtained by a phase inversion method, and the materials used to prepare the ultrafiltration membrane include polyarylether ketone or polyaryl ether sulfone, and the polyarylether ketone has a repeating unit shown in formula III:

[0033]

[0034] The polyarylethersulfone has a repeating unit represented by formula IV:

[0035]

[0036] The ultrafiltration membrane is contacted with a chlorine solution to react to obtain an antibacterial ultrafiltration membrane.

[0037] The preparation method provided by the invention has simple process, mild reaction conditions and low cost.

[0038] The present invention adopts a phase inversion method to obtain an ultrafiltration membrane, and the materials used to prepare the ultrafiltration membrane include...

Embodiment 1

[0063] 1) Preparation of antibacterial ultrafiltration membrane:

[0064] Dissolve polyaryletherketone with a molecular weight of 200,000 g / mol in dimethylacetamide to form a polyaryletherketone solution with a mass fraction of 18%, fully dissolve it, filter to remove insoluble matter and defoam at 30°C Mature in a constant temperature room for 12 hours to obtain the casting solution; use a scraper to scrape the film on a clean glass plate with a slit of 150 μm, then immediately put the glass plate in deionized water for phase inversion, after the phase inversion is complete, soak in deionized water Remove residual solvent to obtain ultrafiltration membrane;

[0065] Soak the prepared ultrafiltration membrane in sodium hypochlorite solution (mass concentration 1%) for 5 min. Wash the residual sodium hypochlorite with water at 30°C, and constantly replace the water to remove a small amount of sodium hypochlorite remaining in the membrane to obtain an antibacterial ultrafiltrat...

Embodiment 2

[0075] 1) Preparation of antibacterial ultrafiltration membrane:

[0076] Dissolve polyaryletherketone with a molecular weight of 120,000 g / mol in dimethylacetamide to form a polyaryletherketone solution with a mass fraction of 15%, fully dissolve it, filter to remove insoluble matter and defoam at 30°C Mature in a constant temperature room for 12 hours to obtain a casting solution; use a scraper to scrape the film on a clean glass plate with a slit of 200 μm, and immediately put the glass plate in deionized water for phase inversion. After the phase inversion is complete, soak in deionized water Remove residual solvent to obtain ultrafiltration membrane;

[0077] Soak the prepared ultrafiltration membrane in sodium hypochlorite solution (mass concentration 5%) for 30min, wash the residual sodium hypochlorite with water at 30°C and soak in water for one day, and constantly replace the water to remove a small amount of sodium hypochlorite remaining in the membrane to obtain ant...

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Abstract

The invention provides an antibacterial ultrafiltration membrane, a preparation method thereof and a membrane regeneration method. The antibacterial ultrafiltration membrane is prepared from an ultrafiltration membrane material possessing a repetitive unit shown as a formula I or a formula II, the repetitive unit shown as the formula I or the formula II contains N-Cl bond, so that the antibacterial ultrafiltration membrane prepared from an ultrafiltration membrane material possessing the repetitive unit shown as the formula I or the formula II possesses relatively high bactericidal activity. Additionally, the antibacterial ultrafiltration membrane possesses good filtration separation performance, can stably exist in air and water, can be recycled and regenerated, and is friendly to environment and free of corrosiveness. Experiment results show that the provided antibacterial ultrafiltration membrane possesses the bactericidal rate on escherichia coli or bacillus subtilis of 90-100%, possesses the bactericidal rate on escherichia coli or bacillus subtilis of 90-100% after being put in air for 6 months, and possesses the retention rate on bovine serum albumin of 99.2% or more.

Description

technical field [0001] The invention relates to the technical field of membrane separation materials, in particular to an antibacterial ultrafiltration membrane, a preparation method thereof and a membrane regeneration method. Background technique [0002] Membrane separation technology is a new contemporary separation technology with outstanding advantages such as high efficiency, convenient operation, no pollution to the environment, and low energy consumption. It has been widely used in the fields of water resources, environment, food, and biomedicine. Membranes can be divided into microfiltration membranes, ultrafiltration membranes, nanofiltration membranes and reverse osmosis membranes according to their pore sizes (or molecular weight cut-offs). [0003] Ultrafiltration is a membrane separation technology that has emerged in the past 30 years and is widely used in the separation of macromolecular components and low molecular weight substances. During the use of ultra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D71/52B01D67/00B01D69/02B01D65/06
Inventor 张所波侯淑华郑吉富毕伟辉李胜海
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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