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Anti-oxidation and anti-biological fouling reverse osmosis membrane and its preparation method and application

A technology of anti-biological pollution and reverse osmosis membrane, applied in chemical instruments and methods, semi-permeable membrane separation, osmosis/dialysis water/sewage treatment, etc., can solve problems such as non-green materials, human body or environmental impact, and achieve anti-oxidation Good performance, strong anti-biological pollution performance, and the effect of improving tolerance

Active Publication Date: 2022-04-22
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, although there are some technical solutions for improving the anti-pollution or oxidation resistance of polyamide reverse osmosis membranes in the prior art, most of the additives used in these technical solutions are not green materials, which may cause harm to the human body or the environment. influences

Method used

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  • Anti-oxidation and anti-biological fouling reverse osmosis membrane and its preparation method and application
  • Anti-oxidation and anti-biological fouling reverse osmosis membrane and its preparation method and application
  • Anti-oxidation and anti-biological fouling reverse osmosis membrane and its preparation method and application

Examples

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Embodiment 1

[0045] The preparation method of the anti-oxidation and anti-biological fouling reverse osmosis membrane of this embodiment comprises the following steps:

[0046] (1) The preparation method of the polysulfone support membrane is the same as that of Comparative Example 1.

[0047] (2) Preparation of the aromatic polyamide desalination layer: first prepare the aqueous phase A solution, wherein the content of each substance contained is: m-phenylenediamine 3.0wt%, sodium hydroxide 0.8wt%, baicalein 0.01wt%, γ -Aminobutyric acid 0.02wt%; then contact the aqueous phase A solution with the wet polysulfone support membrane for 30s; (The solvent is Isopar G isoparaffin) contact reaction for 30s, polyamide composite film is formed by interfacial polycondensation; polyamide composite film is drained vertically in hot air at 90°C for 5min, and then enters the temperature at 50°C and the concentration of 20.0wt % methanol aqueous solution and a citric acid aqueous solution with a temper...

Embodiment 2

[0049] The preparation method of the anti-oxidation and anti-biological fouling reverse osmosis membrane of this embodiment comprises the following steps:

[0050] (1) The preparation method of the polysulfone support membrane is the same as that of Comparative Example 1.

[0051] (2) Preparation of the aromatic polyamide desalination layer: the difference from the preparation method of the aromatic polyamide desalination layer in Example 1 is only that: 3.0 wt% of m-phenylenediamine and 0.8 wt% of sodium hydroxide in the aqueous phase A solution , baicalein 0.01wt%, γ-aminobutyric acid 0.02wt% were replaced by: m-phenylenediamine 3.0wt%, sodium hydroxide 0.8wt%, baicalein 0.02wt%, γ-aminobutyric acid 0.04wt%; The air temperature was 100° C., the heat treatment time was 10 min, and the rest of the experimental conditions and reaction steps were the same as the preparation method of the aromatic polyamide desalination layer in Example 1.

Embodiment 3

[0053] The preparation method of the anti-oxidation and anti-biological fouling reverse osmosis membrane of this embodiment comprises the following steps:

[0054] (1) The preparation method of the polysulfone support membrane is the same as that of Comparative Example 1.

[0055] (2) Preparation of the aromatic polyamide desalination layer: the difference from the preparation method of the aromatic polyamide desalination layer in Example 1 is only that: 3.0 wt% of m-phenylenediamine and 0.8 wt% of sodium hydroxide in the aqueous phase A solution , baicalein 0.01wt%, γ-aminobutyric acid 0.02wt% were replaced by: m-phenylenediamine 3.0wt%, sodium hydroxide 1.0wt%, baicalein 0.05wt%, γ-aminobutyric acid 0.1wt%; The air temperature was 120° C., the heat treatment time was 15 minutes, and the rest of the experimental conditions and reaction steps were the same as the preparation method of the aromatic polyamide desalination layer in Example 1.

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Abstract

The invention provides an anti-oxidation and anti-biological pollution reverse osmosis membrane, a preparation method and application thereof. The reverse osmosis membrane comprises a polysulfone porous support layer and a polyamide desalination layer formed on the polysulfone porous support layer, and the polyamide desalination layer contains a blend of polyhydroxy flavone and small molecule aminocarboxylic acid inside or on the surface. Salt rejection rate and permeation flux evaluation experiments, oxidation resistance evaluation experiments and biofouling resistance evaluation experiments show that compared with common reverse osmosis membranes, the reverse osmosis membrane prepared by the present invention has better oxidation resistance and better biofouling resistance. powerful.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to an anti-oxidation and anti-biological pollution reverse osmosis membrane, a preparation method and application thereof. Background technique [0002] Today, water scarcity has become a problem that cannot be ignored. Compared with traditional water treatment methods, water treatment by reverse osmosis membrane has the characteristics of high separation efficiency, low energy consumption and less pollution, so it is widely used. At present, the mainstream commercial reverse osmosis membrane on the market is aromatic polyamide reverse osmosis composite membrane. This reverse osmosis membrane uses m-phenylenediamine and trimesoyl chloride to form a polyamide desalination layer through interfacial polycondensation reaction on the surface of polysulfone support membrane. After continuous technical improvement, the permeation flux and desalination rate of reverse osmosis mem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/64B01D71/68B01D67/00C02F1/44
CPCB01D71/64B01D71/68B01D67/0006C02F1/441B01D2325/30Y02A20/131
Inventor 高翔赵伟国孙家宽
Owner WANHUA CHEM GRP CO LTD
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