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A reverse osmosis composite membrane with antibacterial function

A reverse osmosis composite membrane and functional technology, applied in the field of polymer composite membranes for water treatment, can solve the problems of membrane surface biochemical pollution, membrane fouling, and restrictions on the application of reverse osmosis technology, and achieve improved hydrophilicity, simple preparation methods, Improve the effect of antibacterial and anti-biofouling properties

Active Publication Date: 2015-08-19
北创清源(北京)科技有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, one of the bottlenecks in the application of reverse osmosis membrane separation technology is membrane fouling, especially biochemical pollution on the membrane surface, which has seriously restricted the application of reverse osmosis technology in the fields of highly polluted water treatment, water reuse, and chemical separation.

Method used

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  • A reverse osmosis composite membrane with antibacterial function
  • A reverse osmosis composite membrane with antibacterial function
  • A reverse osmosis composite membrane with antibacterial function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8

[0053] Table 1: Performance of reverse osmosis composite membranes with different desalination layer materials

[0054]

[0055]

[0056] The above examples show that the reverse osmosis composite membrane with antibacterial function can be obtained by depositing silver chloride coating on the surface of the reverse osmosis composite membrane containing different polymer desalination layers by the solution alternating dipping technique, and the separation performance is obviously better than that of the ordinary reverse osmosis composite membrane. Permeable composite membrane.

Embodiment 9-14

[0058] Table 2: Properties of different reverse osmosis composite membranes with inorganic antibacterial coating materials

[0059]

[0060] The above examples show that the reverse osmosis composite membrane with antibacterial function can be obtained by coating different inorganic antibacterial materials on the surface of the reverse osmosis composite membrane whose desalination layer is a fully aromatic polyamide by alternating solution dipping technology, and the separation performance is better than Ordinary fully aromatic polyamide reverse osmosis composite membrane.

Embodiment 15-20

[0062] Table 3: Performance of reverse osmosis composite membranes with different thicknesses of inorganic antibacterial material layers

[0063]

[0064]

[0065] The above examples show that: on the surface of the reverse osmosis composite membrane whose desalination layer is a fully aromatic polyamide, the reverse osmosis composite membrane with antibacterial function can be obtained by coating the silver carbonate inorganic bacteriostatic material with different thicknesses by the solution alternating dipping technique. The membrane separation performance is better when the thickness of the coating material is less than 200nm.

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Abstract

The invention relates to a macromolecular composite membrane for water treatment and in particular relates to a composite reverse osmosis membrane with an antibacterial function. The composite reverse osmosis membrane is characterized by compositing a polyamide macromolecular desalination layer on a porous support membrane through interfacial polycondensation between polyamine and poly-acyl chloride and coating an inorganic material layer with an antibacterial function on the macromolecular desalination layer through the technology of compositing by alternate impregnation in solutions. The composite reverse osmosis membrane has the advantages that the hydrophilicity and antibacterial property of the composite reverse osmosis membrane are greatly improved and the composite reverse osmosis membrane has good biological pollution resistance by depositing the inorganic material with the antibacterial function on the surface of the existing polyamide composite reverse osmosis membrane; and the composite reverse osmosis membrane with the antibacterial function also has the characteristics that the composite reverse osmosis membrane is easy to prepare, and the desalination rate and the water flux are not lower than the desalination rates and the water fluxes of the existing composite reverse osmosis membranes. The composite reverse osmosis membrane has a wide range of application.

Description

technical field [0001] The invention relates to a polymer composite membrane for water treatment, in particular to a reverse osmosis composite membrane with antibacterial function. technical background [0002] Reverse osmosis technology is a high-efficiency and energy-saving green new separation technology. It has the outstanding characteristics of simple equipment, mild operating conditions, large processing capacity and high separation efficiency. It has been used in seawater and brackish water desalination, wastewater treatment and recycling, biological products. Separation, environmental engineering, food, medicine and other fields have been widely used, and have achieved good economic and social benefits; The field of water reuse has been more widely used and valued. However, one of the application bottlenecks of reverse osmosis membrane separation technology is membrane fouling, especially the biochemical fouling of membrane surface, which has seriously restricted th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D69/02B01D69/10B01D71/56B01D67/00
Inventor 俞三传刘梅红
Owner 北创清源(北京)科技有限公司
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