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Polymer separation membrane with on-line antibiosis and self-cleaning functions and preparation method thereof

An antibacterial self-cleaning, polymer technology, applied in semi-permeable membrane separation, membrane technology, chemical instruments and methods, etc., can solve problems such as pollution, achieve simple preparation process, reduce manufacturing and production application costs, and improve pollution. Effect

Inactive Publication Date: 2010-07-28
SHANDONG DONGYUE POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite membrane not only solves the problem of hydrophilicity and anti-organic pollution of the polymer membrane, but also greatly improves the antibacterial and anti-biological substance pollution of the membrane.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The dopant of nano-titanium dioxide and nano-ferric oxide (TiO 2 -Fe 2 o 3 )preparation:

[0049] (1) Take 100mL of tetrabutyl titanate, add it to 270mL of absolute ethanol, stir it magnetically in an ice-water bath, then slowly add dropwise a mixed solution of 130mL of absolute ethanol, 13mL of water and 10mL of glacial acetic acid (dropwise for 0.6h) , stirred vigorously to obtain transparent sol A;

[0050] (2) Weigh anhydrous FeCl 3 Dissolve in 4-20 times the mass of absolute ethanol, heat under reflux at 80-100°C for 0.5-2h, add 1000 times the mass of absolute ethanol and water mixture under the conditions of ice-water bath and magnetic stirring, and continue stirring for 48h to obtain Sol B;

[0051] (3) Divide sol A into 10 equal parts, and then add 0.3-10.0mL of sol B in order to obtain different proportions of Fe 2 o 3 :TiO 2 Mixed sols; aged for 3-5 days under natural conditions and then vacuum-dried at 80°C to obtain xerogels. After crushing the xero...

Embodiment 2

[0053] Get 1.8 grams of pore-forming agent polyvinylpyrrolidone (PVP) and dissolve it in 24.5 grams of solvent N-N dimethylacetamide (DMAc); get 5.7 grams of dry powdered polyvinylidene fluoride and add it to the above-mentioned organic solution. For accelerating the dissolution process, The sealed solution container can be placed in an oven at 45-60°C; after the polyvinylidene fluoride is completely dissolved, 0.11 grams of nano-titanium dioxide (TiO2 ) particles; then add 5ml of non-solvent isopropanol, and stir evenly until the nano-oxide particles are evenly dispersed in the solution; the above solution is placed statically at 20-30°C for 1-3 days for defoaming, or is quickly degassed under ultrasonic conditions. Degassing to obtain casting solution.

[0054] Use the L-S phase inversion method to form a film on glass at a temperature of 25°C and a humidity of 65%. After volatilization for 10 seconds, put it into a 20% ethanol coagulation solution. After the film peels off a...

Embodiment 3

[0056] Get 18 grams of pore-forming agent polyvinylpyrrolidone (PVP) and dissolve in 245 grams of solvent N-N dimethylacetamide (DMAc); get 57 grams of dry powdered polyethersulfone and add in the above-mentioned organic solution, for accelerating the dissolution process, you can Place the sealed solution container in an oven at 45-60°C; after the polyethersulfone is completely dissolved, add 1.14 grams of nano-titanium dioxide (TiO 2 ) particles; then add non-solvent isopropanol, and stir evenly until the nano-oxide particles are evenly dispersed in the solution; the above solution is placed statically at 20-30°C for 1-3 days for degassing, or is degassed quickly under ultrasonic conditions. Bubble to get casting solution.

[0057] At a temperature of 25°C and a humidity of 65%, the membrane was formed on a hollow fiber membrane spinning device by the L-S phase inversion method, and the prepared casting solution was poured into a raw material tank, and left to stand for 12 ho...

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PUM

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Abstract

The invention belongs to the preparation field of high molecular functional membrane materials, in particular to a polymer microporous filter membrane with the on-line anti-microbial pollution and self-cleaning functions and a preparation method thereof. The membrane is prepared from a casting solution by the phase inversion method, and can be prepared into a flat membrane or a hollow fiber membrane. The casting solution is composed of polymers, nano oxide particles, a pore forming agent and an organic solvent, and is scraped into the flat membrane by the salivation method or prepared into the hollow fiber membrane through a spinneret, the flat membrane or the hollow fiber membrane is then coagulated in de-ionized water or water solution containing the organic solvent to form a primary membrane, and then the primary membrane is soaked in a weak solvent to obtain the polymer separation membrane with the on-line antibiosis and self-cleaning functions. The membrane has favorable elasticity and mechanical strength, and the surface of the membrane has the antibiosis and self-cleaning functions. Besides, since the pore diameter of the membrane is sensitive to the pressure, the de-ionized water flux and the trapped relative molecular mass of the membrane can be controlled by controlling the operation pressure.

Description

technical field [0001] The invention belongs to the field of polymer functional membrane material preparation, and in particular relates to a preparation method of a polymer microporous separation membrane with online antibacterial and self-cleaning functions and pressure sensitive properties. Background technique [0002] For decades, membrane separation technology has developed rapidly. Especially after the 1990s, the application field of membrane separation technology has penetrated into all aspects of people's life and production. As a new high-efficiency separation technology, membrane separation technology has been widely used in Chemical industry, environmental protection, electronics, light industry, textile, petroleum, food, medicine, bioengineering, energy engineering, etc., especially in sewage treatment, oil-water and protein separation, etc. Relevant foreign experts even call the development of membrane separation technology "the third industrial revolution". M...

Claims

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Application Information

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IPC IPC(8): B01D71/06B01D65/08
Inventor 王学军张永明张恒杨磊
Owner SHANDONG DONGYUE POLYMER MATERIAL
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