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Flat sheet membrane for water treatment bacteriostasis and preparation method thereof

A flat membrane, water treatment technology, applied in the field of membrane separation, to achieve the effect of long running time

Pending Publication Date: 2022-01-18
XINJIANG DELAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first purpose of the present invention is to provide a flat membrane for water treatment and antibacterial, which solves the anti-pollution problem of the membrane through the compounding of components, can run for a long time, and the retention rate of bacteria reaches 99% %above

Method used

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  • Flat sheet membrane for water treatment bacteriostasis and preparation method thereof
  • Flat sheet membrane for water treatment bacteriostasis and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take by weighing 13% of resin, 70% of solvent, 7% of pore-forming agent, 3% of additive, and 2% of antibacterial agent according to mass ratio, and configure 1000g of film-making liquid. Among them, the resin is a mixture of polyethersulfone, polysulfone and polyvinylidene fluoride, the solvent is N, N dimethylacetamide, there is 10% calcium chloride in the pore forming agent, the additive is n-heptane, antibacterial The agent contains 0.5ppm of silver ions.

[0031] The above ingredients were mixed and stirred and the temperature was gradually raised to 70°C to make a homogeneous sol. After defoaming treatment, the temperature was lowered to 60° C. and kept for 24 hours. Finally, the film-making liquid was coated on the non-woven fabric substrate with a flat film scraping machine, the coating thickness was 0.2mm, and the film was formed by immersing in a water bath at 25°C. Soak the membrane in a normal temperature water bath for 24 hours to test the performance of t...

Embodiment 2

[0034] Other operation steps are identical with embodiment 1, difference only is: the calcium chloride concentration in the pore-forming agent is 70%.

Embodiment 3

[0036] Other operation steps are identical with embodiment 1, difference only is: the concentration of silver ion in the antibacterial agent is 3ppm.

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Abstract

The invention provides a flat sheet membrane for water treatment bacteriostasis. The flat sheet membrane is mainly prepared from the following raw materials in parts by weight: 15-25 parts of resin, 75-90 parts of a solvent, 5-10 parts of a pore-forming agent, 5-10 parts of an additive and 1-10 parts of a bacteriostatic agent. Through compounding of the components, the anti-pollution problem of the membrane is solved, the membrane can run for a long time, and the retention rate of bacteria reaches 99% or above.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and in particular relates to a flat membrane used for water treatment and bacteriostasis and a preparation method thereof. Background technique [0002] Membrane separation appeared in the early 20th century and developed rapidly after the 1960s. Membrane separation technology is a new separation technology that is rapidly emerging in the application of separation, purification and concentration of traditional Chinese medicine. Membrane separation technology has been widely used in food, medicine, biology, Environmental protection, chemical industry, metallurgy, energy, petroleum, water treatment, electronics, bionics and other fields have produced huge economic and social benefits, and have become one of the most important means in today's separation science. [0003] Membrane separation is an important membrane separation method in the water treatment process, and is widely used i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/06B01D71/34B01D71/68B01D67/00B01D69/10C02F1/44C02F1/50
CPCB01D69/06B01D71/68B01D71/34B01D67/0009B01D69/105C02F1/44C02F1/50B01D2325/48
Inventor 李敏婷曾凡付钱铖姚永杰赵婕
Owner XINJIANG DELAND