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Antibacterial bacteriostatic polysulfone hollow fiber ultrafiltration membrane and preparation method thereof

A technology of ultrafiltration membrane and polysulfone, applied in the field of preparation of ultrafiltration membrane

Inactive Publication Date: 2010-05-12
SHANGHAI AQUA PURIFICATION EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention aims to solve the above problems and overcome the problems of the existing polysulfone hollow fiber ultrafiltration membrane ultrafiltration membrane. The present invention provides a preparation method of polysulfone hollow fiber ultrafiltration membrane. It has obvious antibacterial and antibacterial properties, can significantly inhibit the reproduction of bacteria, thereby reducing the release of heat sources, and it is easier to make the pyrogen content of the filter medium meet the standard requirements.

Method used

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  • Antibacterial bacteriostatic polysulfone hollow fiber ultrafiltration membrane and preparation method thereof
  • Antibacterial bacteriostatic polysulfone hollow fiber ultrafiltration membrane and preparation method thereof

Examples

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Effect test

Embodiment 1

[0037] A preparation method of antibacterial and antibacterial polysulfone hollow fiber ultrafiltration membrane, such as figure 1 Shown, comprise the following steps (by weight):

[0038] (1) First select dry polysulfone (PS) material, if the material is not dry, dry it at 110°C for 2 hours, then dissolve 20 parts of dry polysulfone (PS) in spinning solution tank 1 Make a transparent polymer solution in 75 parts of dimethylacetamide (DMAC), add 0.2 parts of nanometer antibacterial material nano-silver and 5 parts of polyvinylpyrrolidone (PVP) and 5 parts of triethyl nitrate in the polymer solution, Stir at 45°C for 0.5h until it is evenly stirred to obtain a stable, uniform and transparent casting solution; the addition of nano-antibacterial material nano-silver increases the viscosity of the casting solution;

[0039] (2) Stand still for 24h in the spinning liquid material tank 1, defoaming, ripening;

[0040] (3) Extrude the above-mentioned matured material in the spinnin...

Embodiment 2

[0045] A preparation method of antibacterial and antibacterial polysulfone hollow fiber ultrafiltration membrane, such as figure 1 Shown, comprise the following steps (by weight):

[0046] (1) First select dry polysulfone (PS) material. If the material is not dry, it can be dried at 110-120°C for 2-4 hours, and then in spinning solution tank 1, 5-25 parts of dry polysulfone Polysulfone (PS) is dissolved in 65-90 parts of dimethylacetamide (DMAC) to make a transparent polymer solution, and 0.1 part of 1 titanium dioxide 1 and 110 parts of additive polyvinylpyrrolidone (PVP) are added to the polymer solution, Stir at 30°C for 0.5h until evenly stirred to obtain a stable, uniform and transparent casting solution; the addition of nano-antibacterial material titanium dioxide increases the viscosity of the casting solution;

[0047] (2) After the above-mentioned casting solution is stirred, it is left standing in the spinning solution tank 1 for 24h, defoaming and aging;

[0048] ...

Embodiment 3

[0053] A preparation method of antibacterial and antibacterial polysulfone hollow fiber ultrafiltration membrane, such as figure 1 Shown, comprise the following steps (by weight):

[0054] (1) First select dry polysulfone (PS) material. If the material is not dry, it can be dried at 120°C for 4 hours, and then in spinning solution tank 1, dissolve 25 parts of dry polysulfone (PS) Prepare a transparent polymer solution in 65 parts of dimethylacetamide (DMAC), add 5 parts of nano-zinc and 8 parts of triethyl nitrate to the polymer solution, and stir at 50°C for 1 hour until the stirring is uniform and stable , Uniform and transparent casting solution; the addition of nano-antibacterial material nano-zinc increases the viscosity of the casting solution;

[0055] (2) Stand still for 24h in the spinning liquid material tank 1, defoaming, ripening;

[0056] (3) Extrude the above-mentioned matured material in the spinning liquid material tank 1 at a pressure of 4 kg, filter through t...

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Abstract

The invention provides an antibacterial bacteriostatic polysulfone hollow fiber ultrafiltration membrane, which is a mixture consisting of polysulfone (PS) dissolved in solvent and nanometer antibacterial material. Based on parts by weight, the ultrafiltration membrane comprises 5 to 25 parts of polysulfone, 0.05 to 5 parts of nanometer antibacterial material, 2 to 10 parts of additives, 65 to 90 parts of solvent. The invention simultaneously discloses a preparation method, which comprises: (1) dissolving the polysulfone in the solvent in a spinning liquid tank, adding the nanometer antibacterial material and the additives, mixing well and obtaining membrane casting liquid; (2) standing and curing the obtained product; (3) extruding the cured material in the spinning liquid tank, filtering the cured material through a filter so as to remove impurities, metering the obtained product through a metering pump and filtering the obtained product through the filter so as to remove the impurities; (4) spurting membrane silk through a silk-spurting plate; (5) forming the membrane silk into a membrane in coagulating bath; and (6) soaking the formed membrane in pure water in washing bath, washing the solvent and the additives away, winding and outputting the polysulfone hollow fiber ultrafiltration membrane. The membrane has a good bacteriostatic effect.

Description

technical field [0001] The invention relates to a preparation method of an ultrafiltration membrane, in particular to an antibacterial and antibacterial polysulfone hollow fiber ultrafiltration membrane and a preparation method thereof. Background technique [0002] Pyrogen refers to pyrogenic substances produced by microorganisms that can cause an abnormal increase in the body temperature of warm-blooded animals. It includes bacterial pyrogens, endogenous polymer pyrogens, endogenous low molecular pyrogens and chemical pyrogens. The "pyrogen" referred to here mainly refers to bacterial pyrogens, which are metabolites of certain bacteria, bacterial corpses and endotoxins. The products with the strongest pyrogenicity are Gram-negative bacilli, followed by Gram-positive bacilli, and Gram-positive cocci are weaker. Mold, yeast, and even viruses can also produce pyrogens. [0003] The most important characteristic of pyrogens is heat resistance, which is a complex composed of ...

Claims

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Application Information

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IPC IPC(8): B01D69/08B01D71/68
Inventor 孙慧德姜明禹
Owner SHANGHAI AQUA PURIFICATION EQUIP
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