Flux controllable anti-oxidation polyethersulfone nanofiltration membrane and preparation method thereof

A polyethersulfone, anti-oxidation technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of lack of anti-oxidation performance, limited application fields, and lack of flux of nanofiltration membranes , to achieve the effect of good interception capacity, simple preparation method and good anti-oxidation performance

Inactive Publication Date: 2011-08-24
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although nanofiltration has a good prospect for industrial promotion compared with ultrafiltration and reverse osmosis membrane technology, the application field is not extensive so far.
The main factors are two aspects: one is that nanofiltration membranes with good effects generally do not have high flux, and the other is that ordinary interfacially polymerized nanofiltration membrane materials do not have high oxidation resistance

Method used

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  • Flux controllable anti-oxidation polyethersulfone nanofiltration membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Preparation of controllable high-flux anti-oxidation polyethersulfone nanofiltration membrane (membrane 1):

[0014] Weigh 3.6g of polyethersulfone and 15.68g of N,N-dimethylformamide into a three-necked flask, heat in a constant temperature water bath at 60°C, stir and dissolve at 900r / min for about 0.5 hours. After completely dissolving, weigh 0.72g of Pluronic F127 with a molecular weight of 12600 as an additive, stir and dissolve at the same temperature for 3.5 hours, stir and mix evenly, and stand at 60°C for 5-12 hours for defoaming. After cooling to room temperature, pour the casting solution on a glass plate, scrape the film with a metal scraper, place it in the air for 10-30 seconds, put it in a water bath to solidify to form a film, soak it in deionized water for 24 hours, and dry it naturally for 24 hours. hours, and then immersed in deionized water for more than 12 hours to obtain a controllable high-flux anti-oxidation polyethersulfone nanofiltration membra...

Embodiment 2

[0017] Preparation of controllable high-flux polyethersulfone nanofiltration membrane (membrane 2):

[0018] Weigh 3.6g of polyethersulfone and 14.96g of N,N-dimethylformamide into a three-neck flask, heat in a constant temperature water bath at 60°C, stir and dissolve at 900r / min for about 0.5 hours. After completely dissolving, weigh 1.44g of Pluronic F127 with a molecular weight of 12600 as an additive, stir and dissolve at the same temperature for 3.5 hours, stir and mix evenly, and stand at 60°C for 5-12 hours for defoaming. After cooling to room temperature, pour the casting solution on a glass plate, scrape the film with a metal scraper, place it in the air for 10-30 seconds, put it in a water bath to solidify to form a film, soak it in deionized water for 24 hours, and dry it naturally for 24 hours. hours, and then immersed in deionized water for more than 12 hours to obtain a controllable high-flux anti-oxidation polyethersulfone nanofiltration membrane.

[0019] The...

Embodiment 3

[0021] Preparation of controllable high-flux polyethersulfone nanofiltration membrane (membrane 3):

[0022] Weigh 3.6g of polyethersulfone and 14.24g of N,N-dimethylformamide into a three-neck flask, heat in a constant temperature water bath at 60°C, stir and dissolve at 900r / min for about 0.5 hours. After completely dissolving, weigh 2.16g of Pluronic F127 with a molecular weight of 12600 as an additive, stir and dissolve at the same temperature for 3.5 hours, stir and mix evenly, and stand at 60°C for 5 to 12 hours for defoaming. After cooling to room temperature, pour the casting solution on a glass plate, scrape the film with a metal scraper, place it in the air for 10-30 seconds, put it in a water bath to solidify to form a film, soak it in deionized water for 24 hours, and dry it naturally for 24 hours. hours, and then immersed in deionized water for more than 12 hours to obtain a controllable high-flux anti-oxidation polyethersulfone nanofiltration membrane.

[0023] ...

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Abstract

The invention discloses a flux controllable anti-oxidation polyethersulfone nanofiltration membrane and a preparation method thereof. The membrane material consists of polyethersulfone and polyoxyethylene-polyoxypropylene-polyoxyethylene amphiphilic block copolymer with molecular weight of 12,600 in the mass ratio of 1:(0.2-1), wherein the flux is 39.5L / (m2h) when operation pressure is 0.2MPa, and the removal rating to alcian blue is 100 percent. The preparation method comprises the following steps: adding the polyethersulfone into a preparation solution of N,N-dimethyl formamide; adding the polyoxyethylene-polyoxypropylene-polyoxyethylene amphiphilic block copolymer with molecular weight of 12,600 into the solution; stirring to prepare the casting solution; knifing, dipping and drying the casting solution to prepare the flux controllable anti-oxidation polyethersulfone nanofiltration membrane. The invention has the advantages that: the preparation method is easy and convenient, the prepared membrane has large flux, and adjustable flux can be realized by changing composition of membrane materials.

Description

technical field [0001] The invention relates to a controllable flux anti-oxidation polyethersulfone nanofiltration membrane and a preparation method thereof, belonging to membrane separation technology. Background technique [0002] Nanofiltration is a membrane process that separates substances between reverse osmosis and ultrafiltration. It uses the pressure difference on both sides of the membrane as the driving force to achieve a rapid separation effect by cutting off substances with a molecular weight of 100 to 1000. The development of membrane separation technology. It has many advantages. Compared with the dual-membrane process composed of ultrafiltration and reverse osmosis filtration, nanofiltration can overcome the dual Insufficient membrane technology. The main performance is that the operating pressure is low, the quality of water produced is higher than that of ultrafiltration membranes, energy is saved, space usage is reduced, and the cost performance advantag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D69/02
Inventor 苏延磊姜忠义张岩杨华明
Owner TIANJIN UNIV
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