A high-flux anti-pollution nano-hybrid reverse osmosis membrane and its preparation method and application

A reverse osmosis membrane, anti-pollution technology, used in chemical instruments and methods, semi-permeable membrane separation, osmosis/dialysis water/sewage treatment, etc. Low water flux, poor anti-pollution performance, etc., to achieve excellent anti-pollution performance, excellent adsorption performance, and the effect of reducing pollution

Active Publication Date: 2022-05-03
恩泰环保科技(常州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of low water flux of reverse osmosis membrane, poor anti-pollution performance, and weak combination between modified nano-materials and surface desalination layer in the prior art, the present invention aims to provide a high-flux anti-pollution nano Hybrid reverse osmosis membrane and its preparation method and application, to increase the dispersion and binding degree of nanomaterials in the desalination layer, improve the water flux and anti-pollution performance of the reverse osmosis membrane, so that the reverse osmosis membrane can be washed by surface river water for a long time Maintain excellent high salt rejection and water flux

Method used

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  • A high-flux anti-pollution nano-hybrid reverse osmosis membrane and its preparation method and application
  • A high-flux anti-pollution nano-hybrid reverse osmosis membrane and its preparation method and application
  • A high-flux anti-pollution nano-hybrid reverse osmosis membrane and its preparation method and application

Examples

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Embodiment 1

[0030] A high-flux anti-fouling nano-hybrid reverse osmosis membrane, comprising a polysulfone support layer and a hybrid polyamide desalination layer; the hybrid polyamide desalination layer includes acid chloride modified titanium dioxide-clay mineral / graphene oxide nanomaterials , the mass ratio of titanium dioxide, clay minerals and graphene oxide is 3:3:4;

[0031] The clay mineral is attapulgite.

[0032] A method for preparing a high-throughput anti-pollution nano-hybrid reverse osmosis membrane, comprising the following steps:

[0033] (1) Put 10g of attapulgite in 100mL of deionized water and ultrasonically disperse for 30min, then add 10mL of 2.5mol / L TiCl dropwise under stirring condition 4 solution, mix well, add ammonia water to adjust to pH = 8-9, then crystallize at 80°C for 2h, suction filter, wash until neutral, dry at 80°C, and grind to obtain titanium dioxide-attapulgite nanomaterials, denoted as TiO 2 -ATP nanomaterials;

[0034] (2) Disperse 2g of graph...

Embodiment 2～5

[0039] A high-flux anti-fouling nano-hybrid reverse osmosis membrane, comprising a polysulfone support layer and a hybrid polyamide desalination layer; the hybrid polyamide desalination layer includes acid chloride modified titanium dioxide-clay mineral / graphene oxide nanomaterials , the mass ratio of titanium dioxide, clay minerals and graphene oxide is different from that of Example 1, specifically as shown in Table 1;

[0040] The clay mineral is attapulgite.

[0041] Among them, the TiO modified by acid chloride in the hybrid polyamide desalination layer in Examples 2-5 2 -ATP / GO nanomaterials were added in different masses, as shown in Table 1.

[0042] The preparation method of the high-throughput anti-pollution nano-hybrid reverse osmosis membrane is the same as in Example 1, except that the TiO modified by acid chloride in step (4) 2 The addition amount of -ATP / GO nanometer material is different, relevant data is as shown in table 1:

[0043] Table 1

[0044]

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Abstract

The invention belongs to the technical field of reverse osmosis membranes, and relates to a high-flux anti-pollution nano-hybrid reverse osmosis membrane and a preparation method and application thereof. The nano-hybrid reverse osmosis membrane includes a polysulfone support layer and a hybrid polyamide desalination layer; the hybrid polyamide desalination layer includes acid chloride-modified titanium dioxide-clay mineral / graphene oxide nanomaterials, the titanium dioxide, clay The mass ratio of mineral and graphene oxide is (3-6):(2-3):(1-4). Preparation method: soak the polysulfone support layer in m-phenylenediamine aqueous phase solution for 0.5-1min, and then place it in TiO modified with acid chloride 2 ‑ATP / GO nanomaterials are reacted in the trimesoyl chloride oil phase liquid for 0.5-1min to obtain a reverse osmosis membrane. The desalination layer of the reverse osmosis membrane of the present invention has an excellent combination degree with the polysulfone support layer, which improves the water flux and anti-pollution performance of the reverse osmosis membrane, so that it can maintain a high desalination rate and water retention during the long-term scouring of surface river water. flux.

Description

technical field [0001] The invention belongs to the technical field of reverse osmosis membranes, in particular to a high-flux anti-pollution nano-hybrid reverse osmosis membrane and its preparation method and application. Background technique [0002] Water is an indispensable precious resource in people's life. According to incomplete statistics, the proportion of potable fresh water on the earth is less than 0.14%. , resulting in aggravated water pollution, and the proportion of potable water has also decreased year by year. Therefore, how to safely and efficiently recycle, purify and utilize polluted water resources has become a severe challenge that human beings must face. Reverse osmosis membrane water separation technology has been widely used in the desalination of chemical sewage, municipal sewage, seawater, and brackish water in recent years due to its high purification degree, safety, high efficiency, simple operation, no secondary pollution, and easy scale-up. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/76B01D67/00B01D69/02B01D71/02B01D71/56B01D71/68C02F1/44
CPCB01D71/76B01D71/68B01D71/56B01D71/024B01D71/021B01D71/02B01D69/02B01D67/0079C02F1/441Y02A20/131
Inventor 周兴蒙向豪周子杰徐展刘涛单连杰
Owner 恩泰环保科技(常州)有限公司
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