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Charged composite nanofiltration membrane based on organic-inorganic nanoparticles and preparation method thereof

A technology of inorganic nanoparticles and composite nanofiltration membranes, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve problems such as poor structural stability, single/multivalent ion selectivity and insufficient permeation flux of nanofiltration membranes , achieve good pressure resistance, excellent long-term use stability, and simplify the preparation process

Active Publication Date: 2021-12-31
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The present invention aims at the defects of the existing nanofiltration membrane preparation technology, as well as the problems of the existing nanofiltration membrane single / multivalent ion selectivity and permeation flux not high enough, poor structural stability, etc., and provides a method based on organic-inorganic Charged composite nanofiltration membrane of nanoparticles and preparation method thereof

Method used

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  • Charged composite nanofiltration membrane based on organic-inorganic nanoparticles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Add 6g of methyl methacrylate, 5g of methacryloxyethyltrimethylammonium chloride, and 2g of hydroxyethyl methacrylate into 85g of deionized water and mix well, then add 0.15g of For ammonium persulfate, nitrogen gas was introduced into the reaction system for 30 minutes to remove the air in the reaction system, and then the system was reacted at 75° C. for 6 hours, and the whole process was carried out under mechanical stirring at 300 r / min. After the reaction is over, the reaction container is quickly transferred to cold water for cooling to terminate the reaction and obtain cationic amphiphilic polymer nanoparticles.

[0050] Add 10g of ethyl orthosilicate, 20g of ethanol, 5g of water, and 1g of triethylamine into a three-necked flask and mix evenly, react at 60°C for 2 hours, and then gradually add 10g of quaternized ammonium-modified aminopropyl tri The mixture of ethoxy silicon, after which the reaction continued to react at 60°C for 4h, the whole reaction process ...

Embodiment 2

[0060] Add 8g of 1,2-difluoroethylene, 8g of trimethylallyl ammonium chloride and 4g of hydroxyethylacrylamide into 80g of water, mix well, then add 0.15g of ammonium persulfate, and blow nitrogen into the reaction device for 30 minutes The air was kept at a mechanical stirring rate of 300r / min, and the reaction system was reacted at 75°C for 6h. After the reaction, the reaction device was quickly transferred to an ice-water bath to cool down, and the reaction was finalized to obtain cationic amphiphilic polymer nanoparticles.

[0061]Add 10g of methyl orthosilicate, 20g of ethanol, 5g of water, and 1g of hydrogen chloride into a three-necked flask and mix evenly, and react at 60°C for 2 hours, then gradually add 10g of aminopropyltrimethoxysilicon and 10g of quaternized ammonium The mixture of modified aminopropyl trimethoxy silicon, then the reaction continued at 60°C for 4h, the whole reaction process was carried out under the mechanical stirring of 300r / min, after the react...

Embodiment 3

[0071] Add 8g of acrylonitrile, 8g of propylenesulfonic acid, and 4g of methylolacrylamide into 80g of water, mix evenly, add 0.2g of ammonium persulfate, pass nitrogen into the device for 30 minutes to remove the air in the reaction device, and maintain mechanical stirring The speed was 300r / min, and the reaction system was reacted at 75°C for 6h. After the reaction, the system was quickly transferred to a water bath and cooled to room temperature to terminate the reaction, or anionic amphiphilic polymer nanoparticles.

[0072] Put 10g of butyl orthosilicate, 20g of ethanol, 5g of water, and 1g of ammonia into a three-necked flask and mix evenly, react at 60°C for 2 hours, and then gradually add 20g of carboxylated modified aminopropyl triethoxy to the reaction system The mixture of silicon, after which the reaction continued to react at 60°C for 4h, the whole reaction process was carried out under the mechanical stirring of 300r / min, after the reaction was completed, it was ...

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Abstract

The invention discloses a charged composite nanofiltration membrane based on organic-inorganic nanoparticles and a preparation method of the charged composite nanofiltration membrane. The nanofiltration membrane is composed of a supporting layer and a nanofiltration functional layer, the nanofiltration functional layer is formed by cross-linking cross-linked ionic amphiphilic polymer nanoparticles and inorganic nanoparticles, the ionic amphiphilic polymer nanoparticles are mutually cross-linked, and the inorganic nanoparticles and the ionic amphiphilic polymer nanoparticles are mutually cross-linked; the supporting layer is crosslinked with the nanofiltration functional layer through reactive groups on the surface of the supporting layer; according to the preparation method of the nanofiltration membrane, the nanofiltration membrane in a flat, hollow fiber or tubular form can be prepared, the prepared nanofiltration membrane is high in flux, efficient separation of ions and charged small molecules of different valence states can be achieved through the charge characteristic of the nanofiltration membrane, and the nanofiltration membrane is excellent in pressure resistance and has the potential of treating high-concentration brine; the method has great application value in the fields of seawater desalination, ion separation, sewage treatment, hard water softening, biological medicine, food processing and the like.

Description

technical field [0001] The invention belongs to the technical field of membranes, in particular to a charged composite nanofiltration membrane based on organic-inorganic nanoparticles and a preparation method thereof. Background technique [0002] In recent years, with the development of human life and industry, the selective separation of mono / multivalent ions is receiving more and more attention in the fields of energy, chemical industry, and environment. As a highly efficient, energy-saving and environmentally friendly ion separation method, nanofiltration technology is attracting more and more attention, and has been continuously developed and applied. As the core of nanofiltration technology, there are nano permeation channels in the nanofiltration membrane, and the size of the channels is between 0.5-2.0nm. Driven by relatively low working pressure, single / multiple Valence ions are selectively separated. In the separation process of mono / multivalent ions, the transmi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D69/10B01D69/02B01D67/00
CPCB01D69/12B01D69/10B01D69/02B01D69/125B01D67/0079B01D2325/26B01D2325/16B01D2325/14Y02A20/131
Inventor 朱宝库喻文翰邱泽霖方立峰田华沈宇杰
Owner ZHEJIANG UNIV
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