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A kind of antibacterial ultrafiltration membrane and its preparation method 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 easy harm to the environment, easy loss, and drug resistance, and achieve good filtration and separation performance, environmental friendliness, high Bactericidal effect

Active Publication Date: 2017-11-14
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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  • A kind of antibacterial ultrafiltration membrane and its preparation method and membrane regeneration method
  • A kind of antibacterial ultrafiltration membrane and its preparation method and membrane regeneration method
  • A kind of antibacterial ultrafiltration membrane and its preparation method and membrane regeneration method

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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 a kind of antibacterial ultrafiltration membrane and its preparation method and membrane regeneration method, and this antibacterial ultrafiltration membrane is prepared from the ultrafiltration membrane material with the repeating unit shown in formula I or formula II, and described formula I or The repeating unit shown in formula II contains N-Cl bond, so that the antibacterial ultrafiltration membrane prepared from the ultrafiltration membrane material having the repeating unit shown in formula I or formula II has higher bactericidal properties. In addition, the antibacterial ultrafiltration membrane has good filtration and separation performance; it can exist stably in air and water; it can be recycled; it is environmentally friendly and non-corrosive. Experimental result shows: antibacterial ultrafiltration membrane provided by the present invention has a bactericidal rate of 90% to 100% to Escherichia coli or Bacillus subtilis; 100%; the rejection rate of bovine serum albumin is above 99.2%.

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 Patents(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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