Boron-removed polysulphone modified affinitive membrane as well as preparation method and application

A technology of affinity membrane and chloromethylated polysulfone membrane, which is applied in the field of preparation of polysulfone affinity membrane and deboronation performance, can solve the problems of poor deboronation ability and small adsorption capacity, so as to achieve non-pollution, easy scale-up, The effect of small mass transfer resistance

Inactive Publication Date: 2012-06-27
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the boron removal ability is poor and the adsorption capacity is small

Method used

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  • Boron-removed polysulphone modified affinitive membrane as well as preparation method and application
  • Boron-removed polysulphone modified affinitive membrane as well as preparation method and application
  • Boron-removed polysulphone modified affinitive membrane as well as preparation method and application

Examples

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Comparison scheme
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preparation example Construction

[0027] Preparation of chloromethylated polysulfone membrane:

[0028] (1) Dissolve the casting solution with ingredients of chloromethyl polysulfone (18wt%), polyvinylpyrrolidone (7wt%) and N-methylpyrrolidone (75wt%) at 60°C for 24h, and let stand for degassing for 24h ;

[0029] (2) using deionized water as a coagulation bath to make a chloromethylated polysulfone membrane by phase inversion at room temperature;

[0030] (3) Rinse the chloromethylated polysulfone membrane in an aqueous ethanol solution with a volume concentration of 70% in a water bath at 40°C, change the aqueous ethanol solution with a volume concentration of 70% every 1 hour, and rinse for 24 hours to obtain a clean Clean chloromethylated polysulfone membrane.

Embodiment 1

[0032] The preparation method of boron-removing polysulfone modified affinity membrane comprises the following steps:

[0033] (1) The cleaned area is 9cm 2 Chloromethylated polysulfone membrane with aqueous solution of atom transfer radical polymerization monomer -2-glucosamidoethyl methacrylate, copper chloride, atom transfer radical polymerization ligand N, N, N', N, Add 'N'-pentamethyldiethylenetriamine to the container, add deionized water to 50 ml, make the concentration of 2-glucosamidoethyl methacrylate 0.5 g / ml, and make copper chloride The concentration of N, N, N', N, 'N'-pentamethyldiethylenetriamine is 1.3 micromol / ml, so that the concentration of N, N, N', 'N'-pentamethyldiethylenetriamine is 13 mmol / ml;

[0034] (2) After filling the container with nitrogen for 10 minutes to remove the oxygen in the container, add 0.13 mmoles of cuprous chloride, continue to fill with nitrogen for 10 minutes, seal it, react at 30°C for 8 hours, take out the film, and put it in ...

Embodiment 2

[0039] The preparation method of boron-removing polysulfone modified affinity membrane comprises the following steps:

[0040] (1) The cleaned area is 9cm 2 The chloromethylated polysulfone membrane was added with an aqueous solution of 2-glucosamidoethyl methacrylate, copper chloride, N,N,N',N,'N'-pentamethyldiethylenetriamine To the container, add deionized water to 50 ml, make the concentration of 2-glucosamidoethyl methacrylate be 1 g / ml, make the concentration of copper chloride be 0.5 micromol / ml, make N, N, The concentration of N', N, 'N'-pentamethyldiethylenetriamine is 6.5 mmol / ml;

[0041] (2) After filling the container with nitrogen for 10 minutes to remove the oxygen in the container, add 0.26 mmoles of cuprous chloride, continue filling with nitrogen for 10 minutes, seal it, react at 30°C for 1 hour, take out the film, and put it in a water bath at 40°C without Wash with water and ethanol for 24 hours, wash with deionized water for 28 hours, take it out and dry...

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Abstract

The invention relates to a boron-removed polysulphone modified affinitive membrane as well as a preparation method and application. The preparation method of the affinitive membrane comprises the following steps of: (1) adding a chloromethylation polysulphone membrane prepared by adopting a phase inversion method, a water solution of methacrylic acid-2-putoutangxiananyizhi, copper chloride and N, N, N', N', N'-pentamethyl diethylene triamine into a container and adding deionized water; and (2) introducing nitrogen gas, adding cuprous chloride, introducing the nitrogen gas continuously, sealing, reacting, taking out the membrane, placing into anhydrous alcohol, washing, washing by using the deionized water, taking out and airing so as to prepare the boron-removed polysulphone modified affinitive membrane. The original physical property of polysulphone is retained by the membrane disclosed by the invention, and the effectiveness of resin affinity and membrane separation is integrated by the membrane after being modified; moreover, the boron-removed polysulphone modified affinitive membrane has smaller mass transfer resistance in comparison with resin because of a porous structure, any phase change does not occur in the boron removing process of the affinitive membrane, and the pollution is not easy to generate; and moreover, the operation of equipment is simple, and the amplification is easy.

Description

technical field [0001] The invention relates to the preparation of polysulfone affinity membrane and its boron removal performance technical background [0002] With the global economy, social development and population growth and other factors, the shortage of water resources, especially the shortage of safe drinking water, has become one of the bottlenecks restricting human development. Since seawater accounts for 97.3% of the total volume of water, the utilization of seawater has become a solution for human beings. An important channel for water problems. Seawater is rich in nutrients, but drinking water has certain requirements on the content of certain elements, such as boron, if its content is too high, it will cause chronic poisoning in the body, and then lead to nervous system disorders. Therefore, the World Health Organization (WHO) stipulates that the boron content in drinking water should not be higher than 0.5mg / L. However, the average boron content in global s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D67/00C02F1/44C02F1/58
Inventor 孟建强袁敬袁涛张宇峰
Owner TIANJIN POLYTECHNIC UNIV
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