Preparation method and application of hydrophilic polyether sulfone ultrafiltration membrane

A technology of polyethersulfone ultrafiltration membrane and hydrophilic polymer, which is applied in separation methods, chemical instruments and methods, membranes, etc., and can solve the problems of unsuitable large-scale applications, ultrafiltration membrane pollution, and high price of graphene oxide. problem, to achieve the effect of increasing flux recovery rate, changing water flux, and cheap raw materials

Inactive Publication Date: 2017-08-18
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, in the patent CN101259387A, blending F127 is used to improve the hydrophilic performance of the ultrafiltration membrane, but the rejection rate of the ultrafiltration membrane prepared by this method cannot reach 100% in application, and there is a pollution problem of the ultrafiltration membrane; in the patent CN102614788A, the use of oxidation Graphene is blended with polyethersulfone to prepare ultrafiltration membranes to improve the water flux of ultrafiltration membranes. However, the price of graphene oxide is too high to be suitable for large-scale applications.

Method used

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  • Preparation method and application of hydrophilic polyether sulfone ultrafiltration membrane
  • Preparation method and application of hydrophilic polyether sulfone ultrafiltration membrane
  • Preparation method and application of hydrophilic polyether sulfone ultrafiltration membrane

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Embodiment 1

[0033] Embodiment 1: the preparation of hydrophilic polyethersulfone ultrafiltration membrane (membrane 1)

[0034] Weigh 10g of triblock copolymer F127, dissolve in 40ml of dichloromethane, and prepare solution a; weigh 0.04g of 4-dimethylaminopyridine and 1.7g of triethylamine, mix them, dissolve in solution a to obtain solution b; Weigh 0.82g of 2-bromopropionyl bromide and dissolve it in 60ml of dichloromethane to prepare solution c; slowly add solution c to solution b within 60min, and stir vigorously, and keep the reaction system at room temperature for 24h; After the end, the reaction mixture d was washed with alkali and pickled respectively, and dehydrated to obtain a clear solution e; the clear solution e was removed by rotary evaporation to obtain the macroinitiator F127-Br; weigh 0.5g of the macroinitiator Dissolve F127-Br and 3.98g of tert-butyl acrylate in 24ml of methanol, stir until completely dissolved, add 1.34mg of PMEDTA and 0.174mg of copper bromide, and st...

Embodiment 2

[0037]Embodiment 2: the preparation of hydrophilic polyethersulfone ultrafiltration membrane (membrane 2)

[0038] Weigh 10g of triblock copolymer F127, dissolve in 40ml of dichloromethane, and prepare solution a; weigh 0.04g of 4-dimethylaminopyridine and 1.7g of triethylamine, mix them, dissolve in solution a to obtain solution b; Weigh 0.82g of 2-bromopropionyl bromide and dissolve it in 60ml of dichloromethane to prepare solution c; slowly add solution c to solution b within 60min, and stir vigorously, and keep the reaction system at room temperature for 24h; After the end, the reaction mixture d was washed with alkali and pickled respectively, and dehydrated to obtain a clear solution e; the clear solution e was removed by rotary evaporation to obtain the macroinitiator F127-Br; weigh 0.5g of the macroinitiator Dissolve F127-Br and 3.98g of tert-butyl acrylate in 24ml of methanol, stir until completely dissolved, add 1.34mg of PMEDTA and 0.174mg of copper bromide, and sti...

Embodiment 3

[0041] Embodiment 3: the preparation of hydrophilic polyethersulfone ultrafiltration membrane (membrane 3)

[0042] Weigh 10g of triblock copolymer F127, dissolve in 40ml of dichloromethane, and prepare solution a; weigh 0.04g of 4-dimethylaminopyridine and 1.7g of triethylamine, mix them, dissolve in solution a to obtain solution b; Weigh 0.82g of 2-bromopropionyl bromide and dissolve it in 60ml of dichloromethane to prepare solution c; slowly add solution c to solution b within 60min, and stir vigorously, and keep the reaction system at room temperature for 24h; After the end, the reaction mixture d was washed with alkali and pickled respectively, and dehydrated to obtain a clear solution e; the clear solution e was removed by rotary evaporation to obtain the macroinitiator F127-Br; weigh 0.5g of the macroinitiator Dissolve F127-Br and 3.98g of tert-butyl acrylate in 24ml of methanol, stir until completely dissolved, add 1.34mg of PMEDTA and 0.174mg of copper bromide, and st...

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Abstract

The invention discloses a preparation method of a hydrophilic polyether sulfone ultrafiltration membrane and belongs to a preparation technology of ultrafiltration membranes. The method comprises the steps of dissolving a triblock copolymer F127 into dichloromethane, adding 2-bromopropionyl bromide in the presence of a catalyst to obtain organic halide; adding the organic halide as an initiator to a monomer tert-butyl acrylate, synthesizing a hydrophilic polymer with carboxyl through an atom transfer radical polymerization method; and dissolving polyether sulfone into N,N-dimethylacetamide, adding the hydrophilic polymer, and stirring evenly and mixing to prepare a casting solution, thereby obtaining the hydrophilic polyether sulfone ultrafiltration membrane through a phase inversion method. The polyether sulfone ultrafiltration membrane has better hydrophilicity and high water flux, retention rate, anti-pollution capacity and recovery rate.

Description

technical field [0001] The invention belongs to the technical field of ultrafiltration membrane preparation, and in particular relates to a preparation method and application of a hydrophilic polyethersulfone ultrafiltration membrane. Background technique [0002] The use of membrane separation technology to purify macromolecular solutions as an alternative to traditional separation methods has gained enough interest among researchers in the past two decades, and some technologies have been used commercially. The membrane separation process has several characteristics. During the separation process, the substances do not undergo phase changes, the separation coefficient is large, and the operating temperature is around room temperature. Therefore, the membrane separation process has the characteristics of energy saving and high efficiency, and is an important high-tech solution to solve major problems such as energy and resource crises and environmental pollution faced by co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D69/02B01D67/00C02F1/44C02F1/40
CPCB01D71/68B01D67/0006B01D69/02B01D2325/36C02F1/40C02F1/444
Inventor 周建成王苑婷许景程魏凌飞李乃旭
Owner SOUTHEAST UNIV
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