Preparation method of composite ultrafiltration membrane

A technology for ultrafiltration membranes and preparation steps, which is applied in the field of preparation of composite ultrafiltration membranes, and can solve problems such as difficult cleaning, affecting the service life of ultrafiltration membrane products, and rapid contamination, and achieves wide application fields and good antifouling performance and mechanical strength, the effect of uniform pore size distribution

Active Publication Date: 2018-08-10
江西五阳新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Most of the existing ultrafiltration membrane products are polluted quickly and difficult to clean due to the antibacterial and material problems of the membrane itself, which affects the service life of the ultrafiltration membrane products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Connect the pretreated porous ceramic membrane to the scraper, evenly scrape the casting solution on the porous ceramic membrane, evaporate, gel, and post-treatment to obtain the ultrafiltration membrane product.

[0015] The preparation method of the porous aluminum oxide membrane is as follows: in a stirred tank, add α-Al with a particle diameter of 20-40nm 2 o 3 1000g, 5g of sodium hexametaphosphate, 1550g of water, 10g of dibutyl phthalate, 105g of acrylate latex, 7g of 4,4'-dicarboxydiphenylethylene, stirred at a speed of 225rpm for 2h, and then allowed to Cast flow molding on the ceramic substrate, dry at 45°C for 45 hours, separate the dried porous ceramic membrane from the ceramic substrate, increase the temperature to 1500°C at a heating rate of 1°C / min, keep it for 25 minutes, and obtain a porous membrane after cooling. Aluminum oxide film products.

[0016] The preparation method of the casting solution is: in a stirred tank, add 1000g of N,N-dimethylformam...

Embodiment 2

[0018] Connect the pretreated porous ceramic membrane to the scraper, evenly scrape the casting solution on the porous ceramic membrane, evaporate, gel, and post-treatment to obtain the ultrafiltration membrane product.

[0019] The preparation method of the porous aluminum oxide membrane is as follows: in a stirred tank, add α-Al with a particle diameter of 20-40nm 2 o 3 1000g, 2g of sodium hexametaphosphate, 1300g of water, 5g of dibutyl phthalate, 70g of acrylate latex, 4g of 4,4'-dicarboxydiphenylethylene, stirred at a speed of 150rpm for 1h, and then allowed to Flow molding on the ceramic substrate, drying at 40°C for 36 hours, separating the dried porous ceramic membrane from the ceramic substrate, raising the temperature to 1400°C at a heating rate of 1°C / min, keeping it for 18 minutes, and obtaining a porous film after cooling Aluminum oxide film products.

[0020] The preparation method of the casting solution is: in a stirred tank, add 1000g of N,N-dimethylformamid...

Embodiment 3

[0022] Connect the pretreated porous ceramic membrane to the scraper, evenly scrape the casting solution on the porous ceramic membrane, evaporate, gel, and post-treatment to obtain the ultrafiltration membrane product.

[0023] The preparation method of the porous aluminum oxide membrane is as follows: in a stirred tank, add α-Al with a particle diameter of 20-40nm 2 o 3 1000g, sodium hexametaphosphate 8g, water 1800g, dibutyl phthalate 5g, acrylate latex 70g, 4,4'-dicarboxydiphenylethylene 10g, stirred at 300rpm for 3h, and then allowed to Flow molding on the ceramic substrate, drying at 50°C for 54 hours, separating the dried porous ceramic membrane from the ceramic substrate, raising the temperature to 1600°C at a heating rate of 1°C / min, keeping it for 32 minutes, and obtaining a porous film after cooling Aluminum oxide film products.

[0024] The preparation method of the casting solution is: in a stirred tank, add 1000g of N,N-dimethylformamide, 300g of polyethersulfo...

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PUM

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Abstract

The invention relates to a preparation method of composite ultrafiltration membrane. The preparation method comprises the following steps of connecting a pretreated porous alumina membrane onto a scraping-coating device, uniformly scraping-coating a membrane casting solution on the porous alumina membrane, evaporating, gelating and carrying out post treatment, so that an ultrafiltration membrane product is obtained.

Description

technical field [0001] The invention relates to a preparation method of an ultrafiltration membrane, in particular to a preparation method of a composite ultrafiltration membrane. Background technique [0002] The ultrafiltration membrane screening process uses the pressure difference on both sides of the membrane as the driving force and the ultrafiltration membrane as the filter medium. The pores only allow water and small molecular substances to pass through and become the permeate, while the substances in the original solution that are larger than the micropore diameter of the membrane surface are trapped on the liquid inlet side of the membrane and become concentrated solution, thus realizing the purification, separation and concentration of the original solution the goal of. There are about 6 billion micropores of 0.01 micron on the wall of the ultrafiltration membrane per meter long, and its pore size only allows water molecules, beneficial minerals and trace element...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D67/00B01D69/02B01D71/02
CPCB01D67/0079B01D69/02B01D71/025B01D71/68B01D2325/24
Inventor 王金桢
Owner 江西五阳新材料有限公司
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