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Production method of anti-pollution ultrafiltration membrane

An ultrafiltration membrane and anti-pollution technology, which is applied in the field of ultrafiltration membranes, can solve problems such as easy pollution, fast attenuation, and membrane fouling, and achieve the effects of improving anti-pollution ability, pure water flux, and performance

Active Publication Date: 2019-11-15
HEBEI ZHONGQUAN ENVIRONMENT PROTECTION TECHCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrophilicity of most ultrafiltration membranes is not good at present, so the membrane fouling problem is serious during use, resulting in low flux and fast attenuation of ultrafiltration membranes, and easy contamination, which greatly limits the application of ultrafiltration membranes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method of an anti-pollution ultrafiltration membrane, comprising the following steps:

[0027] S1. Dissolve 1g of polyethersulfone and 1g of polyimide in a sulfuric acid solution with a mass concentration of 5%, acidify for 5h, filter and dry; then place it in a sodium carbonate solution with a mass concentration of 10%, soak for 2h, and filter After washing and drying; then adding the treated polyethersulfone and polyimide into 10g of N,N-dimethylformamide, and stirring at a rate of 600r / min for 6h to obtain the first solution;

[0028] S2. Add 0.02g of modified nano-lanthanum oxide and 0.03g of modified nano-cerium oxide to the first solution, stir at a stirring rate of 600r / min for 4h at a temperature of 30°C, and then stir at a frequency of 60KHz Ultrasound for 20 minutes, vacuum defoaming for 30 minutes at a vacuum degree of 0.01Mpa to obtain the second solution;

[0029] S3. Pour the second solution on a glass plate, scrape off the nascent eco-film ...

Embodiment 2

[0034] A preparation method of an anti-pollution ultrafiltration membrane, comprising the following steps:

[0035] S1. Dissolve 1g of polyethersulfone and 2g of polyimide in a sulfuric acid solution with a mass concentration of 8%, acidify for 5 hours, filter and dry; then place it in a sodium carbonate solution with a mass concentration of 12%, soak for 2 hours, and filter Afterwards, washing and drying; then adding the treated polyethersulfone and polyimide to 12g of N,N-dimethylformamide, and stirring at a rate of 600r / min for 6h to obtain the first solution;

[0036] S2. Add 0.03g of modified nano-lanthanum oxide and 0.04g of modified nano-cerium oxide to the first solution, stir at a stirring rate of 700r / min for 5h at a temperature of 35°C, and then stir at a frequency of 70KHz Ultrasound for 25 minutes, vacuum defoaming for 45 minutes under a vacuum of 0.03Mpa to obtain the second solution;

[0037] S3. Pour the second solution on a glass plate, scrape off the nascent...

Embodiment 3

[0042] A preparation method of an anti-pollution ultrafiltration membrane, comprising the following steps:

[0043] S1. Dissolve 1g of polyethersulfone and 3g of polyimide in a sulfuric acid solution with a mass concentration of 10%, acidify for 5h, filter and dry; then place it in a sodium carbonate solution with a mass concentration of 15%, soak for 2h, and filter After washing and drying; then adding the treated polyethersulfone and polyimide into 10g of N,N-dimethylformamide, and stirring at a rate of 600r / min for 6h to obtain the first solution;

[0044] S2. Add 0.05g of modified nano-lanthanum oxide and 0.06g of modified nano-cerium oxide to the first solution, first stir at a temperature of 40°C at a stirring rate of 800r / min for 6h, and then at a frequency of 80KHz Ultrasound for 25 minutes, vacuum defoaming for 60 minutes under a vacuum of 0.05Mpa to obtain the second solution;

[0045] S3. Pour the second solution on a glass plate, scrape off the nascent eco-film wi...

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Abstract

The invention provides a production method of an anti-pollution ultrafiltration membrane. By adding a modified nanometer lanthanum oxide and a modified nanometer cerium oxide into a film-forming material, the modified nanometer lanthanum oxide and the modified nanometer cerium oxide have large specific surface areas, thus the performance of the ultrafiltration membrane can be improved, moreover, both the lanthanum oxide and the cerium oxide are rare earth oxides, by applying the lanthanum oxide and the cerium oxide into the ultrafiltration membrane, the pure water flux of the ultrafiltration membrane can be greatly improved, moreover, the flux recovery rate is high, experiments show that the pure water flux of the ultrafiltration membrane produced by adding the modified nanometer lanthanumoxide and the modified nanometer cerium oxide can reach 170 L / m<2>.h or above, and the flux recovery rate can reach 90% or above, so that the anti-pollution capability is greatly improved. Accordingto the production method of the anti-pollution ultrafiltration membrane, by adding the modified nanometer lanthanum oxide and the modified nanometer cerium oxide, the two oxides have a synergistic effect, so that compared with an ultrafiltration membrane produced by only adding nanometer lanthanum oxide or nanometer cerium oxide, the anti-pollution ultrafiltration membrane has the advantage that the pure water flux of the anti-pollution ultrafiltration membrane is greatly improved.

Description

technical field [0001] The invention relates to the technical field of ultrafiltration membranes, in particular to a preparation method of an anti-pollution ultrafiltration membrane. Background technique [0002] The ultrafiltration membrane is one of the earliest developed polymer separation membranes, and the ultrafiltration device was industrialized in the 1960s. Ultrafiltration membranes are widely used in industry and have become one of the new chemical unit operations. Ultrafiltration membrane technology is widely used in various separation and purification processes in the electronics, chemical, pharmaceutical, food and other industries. However, the hydrophilicity of most ultrafiltration membranes is not good at present, so the membrane fouling problem is serious during use, resulting in low flux, fast attenuation and easy pollution of ultrafiltration membranes, which greatly limits the application of ultrafiltration membranes. [0003] Based on this, it is necessa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02B01D69/12B01D71/68
CPCB01D67/0093B01D69/02B01D69/12B01D71/68B01D2323/08B01D2323/10B01D2325/36
Inventor 陈泉学
Owner HEBEI ZHONGQUAN ENVIRONMENT PROTECTION TECHCO LTD
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