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Antibacterial composite reverse osmosis membrane for high-efficiency water treatment and preparation method

A reverse osmosis membrane and water treatment technology, applied in water/sewage treatment, water/sludge/sewage treatment, osmosis/dialysis water/sewage treatment, etc., can solve environmental variability, poor antibacterial ability, and antibacterial rate Reduce environmental variability, stabilize antibacterial performance, and prolong service life

Inactive Publication Date: 2018-07-31
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, anti-pollution reverse osmosis membranes that are widely used have poor antibacterial ability and cannot inhibit the biochemical pollution on the surface of reverse osmosis membranes. The existing antibacterial reverse osmosis membranes have environmental variability, antibacterial coatings are unstable, and the problem of decreased bacteriostatic rate is prominent. Poor antibacterial performance and short service life

Method used

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Examples

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Effect test

Embodiment 1

[0033] (1) First immerse the porous polysulfone support membrane in the piperazine aqueous solution, take it out after 9 minutes, then immerse it in the n-hexane solution of trimesoyl chloride, take it out after 1 minute, then immerse it in the glycerol aqueous solution containing formaldehyde, take it out after 32 hours, and A polyamide desalination layer is prepared on the surface of the porous polysulfone support membrane; the average thickness of the porous polysulfone support membrane is 2 mm, the porosity is 56%, and the average pore diameter is 120 μm;

[0034] In the piperazine aqueous solution, by weight, wherein: 2 parts of piperazine, 98 parts of water; in the n-hexane solution of trimesoyl chloride, by weight, wherein: 1 part of trimesoyl chloride, 99 parts of n-hexane; In the glycerol aqueous solution containing formaldehyde, by weight, wherein: 3 parts of formaldehyde, 32 parts of glycerin, 65 parts of water;

[0035] (2) Add Bacillus natto antibacterial protein,...

Embodiment 2

[0041] (1) First immerse the porous polysulfone support membrane in the piperazine aqueous solution, take it out after 8 minutes, then immerse it in the n-hexane solution of trimesoyl chloride, take it out after 2 minutes, then immerse it in the glycerol aqueous solution containing formaldehyde, take it out after 24 hours, and A polyamide desalination layer is prepared on the surface of the porous polysulfone support membrane; the average thickness of the porous polysulfone support membrane is 1 mm, the porosity is 50%, and the average pore diameter is 80 μm;

[0042] In the piperazine aqueous solution, by weight, wherein: 1 part of piperazine, 99 parts of water; in the n-hexane solution of trimesoyl chloride, by weight, wherein: 0.5 parts of trimesoyl chloride, 99.5 parts of n-hexane; In the glycerol aqueous solution containing formaldehyde, by weight, wherein: 2 parts of formaldehyde, 30 parts of glycerin, 68 parts of water;

[0043] (2) Add Bacillus natto antibacterial protei...

Embodiment 3

[0049] (1) First immerse the porous polysulfone support membrane in the piperazine aqueous solution, take it out after 10 minutes, then immerse it in the n-hexane solution of trimesoyl chloride, take it out after 1 minute, then immerse it in the glycerol aqueous solution containing formaldehyde, take it out after 36 hours, and A polyamide desalination layer is prepared on the surface of the porous polysulfone support membrane; the average thickness of the porous polysulfone support membrane is 1 mm, the porosity is 60%, and the average pore diameter is 200 μm;

[0050] In the piperazine aqueous solution, by weight, wherein: 3 parts of piperazine, 97 parts of water; in the n-hexane solution of trimesoyl chloride, by weight, wherein: 1.5 parts of trimesoyl chloride, 98.5 parts of n-hexane; In the glycerol aqueous solution containing formaldehyde, by weight, wherein: 4 parts of formaldehyde, 35 parts of glycerin, 61 parts of water;

[0051] (2) Add Bacillus natto antibacterial pr...

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Abstract

The invention relates to the field of water-treatment materials and discloses an antibacterial composite reverse osmosis membrane for high-efficiency water treatment and a preparation method. The preparation method comprises the following preparation processes of: (1) immersing a porous polysulfone supporting membrane into piperazine aqueous solution, n-hexane solution of trimesoyl chloride and glycerinum aqueous solution containing formaldehyde successively, and after taking out, preparing out a polyamide desalting layer on the surface of the porous polysulfone supporting film; (2) preparingdispersion liquid by adopting the following components in parts by weight: 25-30 parts of bacillus-natto antibacterial protein, 22-25 parts of protamine, 5-8 parts of sodium lactate and 37-48 parts ofwater; (3) after mixing the dispersion liquid and glutamine transaminase, coating on single surface of the polyamide desalting layer, drying and preparing the antibacterial composite reverse osmosismembrane. Compared with the traditional antibacterial composite reverse osmosis membrane, the antibacterial composite reverse osmosis membrane disclosed by the invention is firm in antibacterial layerand difficult in dropping, can generate bacteriostatic action for multiple strains, and is good in bacteriostatic effect, stable in bacteriostatic property and long in service life.

Description

technical field [0001] The invention relates to the field of water treatment materials, and discloses an antibacterial composite reverse osmosis membrane for high-efficiency water treatment and a preparation method thereof. Background technique [0002] Reverse osmosis technology is a new green separation technology with high efficiency and energy saving. It has the outstanding characteristics of simple equipment, mild operating conditions, large processing capacity and high separation efficiency. Separation, environmental engineering, food, medicine and other fields have been widely used, and have achieved good economic and social benefits; in recent years, with the increasing shortage of global water resources and increasing water pollution, reverse osmosis technology has The field of water reuse has been more widely used and valued. [0003] However, one of the bottlenecks in the application of reverse osmosis membrane separation technology is membrane fouling, especiall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D61/02B01D67/00B01D69/12C02F1/44
CPCY02A20/131B01D71/68B01D61/025B01D67/0002B01D69/12B01D2325/48C02F1/441
Inventor 陈庆昝航
Owner CHENDU NEW KELI CHEM SCI CO LTD
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