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Antibacterial macromolecular ultra-filtration membrane and preparation method thereof

A technology of polymer and ultrafiltration membrane, which is applied in the field of ultrafiltration membrane to achieve the effect of reducing storage costs

Active Publication Date: 2013-05-29
江苏美能膜材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, there is no polymer ultrafiltration membrane with long-term effective antibacterial function.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of inorganic antibacterial agent with zeolite as carrier: (by weight in percentage, the same below) get 89% of zeolite (alcime or layer zeolite), copper ion 10% (in terms of copper nitrate) and polyethylene glycol -4001%. Use deionized water to make copper nitrate into a 6% aqueous solution, then add zeolite, heat to 85°C to boil and then settle still, remove the supernatant, add polyethylene glycol-400 to the slurry precipitation layer and heat to 80°C °C, after reacting for 200 minutes, dry, pulverize and grind into a solid powder with a particle size of 0.5 μm.

[0033] (2) polyvinylidene fluoride resin (PVDF) 18%, solvent dimethylacetamide 62%, polyethylene glycol-400 13.5%, pore-forming agent polyvinylrolidone 6.5% and prepared by (1) Copper ion zeolite-based inorganic antibacterial agent (0.05% of the amount of polyvinylidene fluoride resin) is mixed, and these raw materials are stirred at 90°C to be a polymer solution, and after vacuum degassing ...

Embodiment 2

[0035] (1) Prepare an inorganic antibacterial agent. The difference from the formula in Example 1 is that the inorganic salt contains 12.5% ​​zinc ions (calculated as zinc acetate), 87% zeolite and 0.5% polyethylene glycol-400. Use deionized water to prepare zinc acetate into an 8% aqueous solution, then add layer zeolite, heat to 90°C to boil and then settle still, remove the supernatant, add polyethylene glycol-400 to the slurry precipitation layer and heat to After reacting at 75°C for 300 minutes, it was dried, pulverized and ground into a solid powder with a particle size of 0.4 μm.

[0036] (2) Polyvinylidene fluoride resin (PVDF) 15%, solvent dimethylformamide 65%, pore forming agent polypropylene glycol 6.5%, polyvinylpyrrolidone 7.5%, non-solvent methanol 0.5%, surfactant dodecane Sodium phenyl sulfonate 4.5% and the zinc ion zeolite made by (1) are the inorganic antibacterial agent (0.1% of polyvinylidene fluoride resin amount) of carrier, these raw materials are sti...

Embodiment 3

[0038] (1) prepare the inorganic antibacterial agent, the difference with the prescription among the embodiment one is that the inorganic salt is 2.5% silver ion (in terms of silver nitrate), 96% zeolite and 1.5% polyethylene glycol-400 (the above-mentioned components are all in weight percent). Use deionized water to make silver nitrate into a 5% aqueous solution, then add zeolite, heat to 70°C to boil and then settle still, remove the supernatant, add polyethylene glycol-400 to the slurry precipitation layer and heat to 85 ℃, after reacting for 250 minutes, dry, pulverize and grind into a solid powder with a particle size of 0.45 μm.

[0039] (2) The polyvinylidene fluoride (PVDF) hollow fiber membrane prepared by adding the silver ion inorganic antibacterial agent prepared by (1) with zeolite as a carrier to the polymer membrane-making solution of Example 1 (2) Outer diameter 1.25mm, inner diameter 0.67mm, porosity 78.2%, pure water flux at 0.1mPa, 803L / m at 25°C 2 hr, th...

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Abstract

The invention relates to a macromolecular ultra-filtration membrane having a long-term antibacterial effect and a preparation method thereof. The preparation method for the antibacterial macromolecular ultra-filtration membrane comprises the following steps: (a) preparing a macromolecular membrane-preparing solution; (b) adding antibacterial grains into the macromolecular membrane-preparing solution, wherein the antibacterial grains are prepared by compounding inorganic carriers and antibacterial agents and have a long-term slow-releasing function, the weight of the antibacterial grains is 0.01-0.1% of the weight of the macromolecules in the macromolecular membrane-preparing solution, and the grain size of the antibacterial grains is 0.01-10 mu m; and (c) preparing the antibacterial macromolecular ultra-filtration membrane by adopting a dry-wet or wet spinning method through a non-solvent induced phase separation process (NIPS) or a thermally induced phase separation process (TIPS). Afiber ultra-filtration membrane provided by the invention can be applied to the water filtration and purification and has the long-term antibacterial effect. The macromolecular ultra-filtration membrane can be widely applied to the drinking water treatment, the household water purifiers, and the filtration and purification for foods and medicines.

Description

technical field [0001] The invention belongs to the field of ultrafiltration membranes, in particular to a polymer ultrafiltration membrane with long-term antibacterial effect and a preparation method thereof. The antibacterial polymer ultrafiltration membrane of the invention can be applied to drinking water treatment, household water purifiers, and filtration treatment and purification of food and medicine. Background technique [0002] Ultrafiltration membrane is a microporous filtration membrane with a pore size in the range of 0.001-0.1 microns. Ultrafiltration membrane separation technology (ultrafiltration) based on ultrafiltration membrane has become a new type of separation process and is widely used in water treatment ( Such as drinking water purification), beverage, biology, food, medicine and other fields. [0003] Ultrafiltration is a separation process related to the size of the membrane pores. The pressure difference on both sides of the membrane is used as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D67/00B01D71/34
Inventor 杨新浩葛海霖
Owner 江苏美能膜材料科技有限公司
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