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High throughput antibacterial composite nanofiltration membrane and preparation method thereof

A composite nanofiltration membrane, high-throughput technology, applied in the field of membrane separation, can solve problems such as complicated processes, and achieve the effects of simple and mild method, high bacteriostatic rate, and high-throughput

Active Publication Date: 2018-02-02
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, a large number of studies are based on the composite membrane to modify the membrane by grafting or post-treatment, which is not only complicated, but also sacrifices a certain selectivity or flux of the membrane while giving the membrane a certain antibacterial property.

Method used

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  • High throughput antibacterial composite nanofiltration membrane and preparation method thereof
  • High throughput antibacterial composite nanofiltration membrane and preparation method thereof
  • High throughput antibacterial composite nanofiltration membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing a high-throughput antibacterial composite nanofiltration membrane, comprising the steps of:

[0023] (1) branched polyethyleneimine (Mn=10000) and triethylamine are added in water, obtain branched polyethyleneimine mass percent concentration and be 0.1%, the mass percent concentration of triethylamine is the aqueous phase of 2%, Contact the functional layer of the polysulfone (Mw=30000) ultrafiltration membrane with the water phase for 600s, and remove the excess water phase on the surface of the membrane by rolling with a rubber roller;

[0024] (2) Phosphazene tripolychloride is put into normal hexane and is made into the organic phase solution that mass percent concentration is 0.2%, and the surface that the film that step (1) obtains is contacted with water phase again with described organic phase solution Contact for 30s to remove excess organic phase solution on the surface of the membrane;

[0025] (3) Place the membrane obtained in step (...

Embodiment 2

[0028] A method for preparing a high-throughput antibacterial composite nanofiltration membrane, comprising the steps of:

[0029] (1) branched polyethyleneimine (Mn=1800) and sodium hydroxide are added in water, obtain branched polyethyleneimine mass percent concentration and be 5%, the mass percent concentration of sodium hydroxide is the aqueous phase of 2%, Contact the functional layer of the ultrafiltration membrane made of polyacrylonitrile (Mw=100000) with the water phase for 600s to remove excess water phase on the surface of the membrane;

[0030] (2) putting trimeric phosphazene chloride into Isopar G to make an organic phase solution with a mass percentage concentration of 1.5%, the surface of the membrane obtained in step (1) in contact with the water phase is then mixed with the organic phase solution Contact for 60s to remove excess organic phase solution on the surface of the membrane;

[0031] (3) Place the membrane obtained in step (2) at 80° C. for 1 min; wa...

Embodiment 3

[0034] A method for preparing a high-throughput antibacterial composite nanofiltration membrane, comprising the steps of:

[0035] (1) branched polyethylenimine (Mn=60000) and sodium bicarbonate are added in water, obtain branched polyethyleneimine mass percent concentration and be 1%, the mass percent concentration of sodium bicarbonate is the aqueous phase of 1%, Contact the functional layer of the ultrafiltration membrane made of polyvinylidene fluoride (Mw=50000) with the water phase for 30 seconds to remove excess water phase on the membrane surface;

[0036] (2) putting the dioxophosphonitrile fluorinated trimer into n-heptane to make an organic phase solution with a mass percent concentration of 0.5%, and

[0037] The surface of the membrane obtained in step (1) in contact with the water phase is then contacted with the organic phase solution for 180s to remove excess organic phase solution on the membrane surface;

[0038] (3) Place the membrane obtained in step (2) a...

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Abstract

The invention discloses a high throughput antibacterial composite nanofiltration membrane and a preparation method thereof. The preparation method comprises the following steps: (1) adding branched polyethyleneimine and an acid binding agent into water to obtain a water phase, enabling a functional layer surface of an ultrafiltration membrane to be contacted with the water phase, and removing theexcess water phase on the surface of the membrane; (2) putting a monomer into an organic solvent to prepare an organic phase solution, enabling the surface, which is contacted with the water phase andis obtained in the step (1), of the membrane to be contacted with the organic phase solution for 30-300s, and removing the excess organic phase solution on the surface of the membrane; (3) placing the membrane, obtained in the step (2), at the temperature of 30-150 DEG C for 1-60min; washing the obtained membrane with deionized water to obtain the high throughput antibacterial composite nanofiltration membrane. The high throughput antibacterial composite nanofiltration membrane prepared by the method also has very high bacteriostatic rate while having high throughput. The preparation method adopts simple interfacial polymerization to directly prepare the high throughput antibacterial composite nanofiltration membrane, and is simple and convenient, mild in conditions and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and in particular relates to a high-throughput antibacterial composite nanofiltration membrane and a preparation method thereof. Background technique [0002] With the development of economy, the increase of population and the aggravation of water pollution, many countries in the world are facing the problem of water shortage. Therefore, how to improve the reuse rate of water, the recycling of water resources, and reduce discharge are the primary tasks in the work of water conservation. [0003] Nanofiltration membranes have been widely used in pharmaceuticals, industrial wastewater treatment, drinking water treatment, seawater desalination pretreatment, dye removal, etc. . However, the existence of membrane microbial fouling requires a large amount of chemical reagents to clean the biologically contaminated layer after a certain period of use, which not only brings side effects suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/60B01D69/12B01D69/02B01D67/00B01D61/02
CPCB01D61/027B01D67/0002B01D69/02B01D69/12B01D71/60B01D2325/48
Inventor 孟建强李文俏潘赢
Owner TIANJIN POLYTECHNIC UNIV
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