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Polysulfone side chain grafted polymerized tertiary amine micro-filtration membrane

A polytertiary amine and microfiltration membrane technology, applied in the field of membrane separation, can solve the problems of high operating cost, low retention rate, and inability to remove toxic substances in nanofiltration technology, and achieve the effect of improving separation selectivity and broadening applications.

Inactive Publication Date: 2016-12-07
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems in the prior art that the interception rate of many small molecular substances is low, the removal of toxic substances cannot meet the standard, and the operating cost of nanofiltration technology is high, the present invention provides: (1) a polysulfone side chain grafted polytertiary amine Microfiltration membrane; (2) A preparation method of a polysulfone side chain grafted polytertiary amine microfiltration membrane; (3) A polysulfone side chain grafted polytertiary amine microfiltration membrane is applied to adsorb and separate anions in aqueous media (4) A method for determining the adsorption performance of polysulfone side chain grafted polytertiary amine microfiltration membrane

Method used

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Embodiment 1

[0043] (1) Preparation of polysulfone side chain grafted polytertiary amine microfiltration membrane

[0044] In the first step, add 1.0g CMPSF and 6mL dimethylacetamide to a four-neck flask, and add 0.22g PEG-400 under stirring conditions, and let it stand for defoaming; pour the solution on a horizontal glass plate, scrape it evenly, and form Uniform and thin layer, quickly put in a water bath, phase inversion into a film; place the film in distilled water for several times of water soaking, after vacuum drying, the CMPSF asymmetric porous base film is obtained;

[0045] In the second step, soak 1g of CMPSF asymmetric porous membrane in ethylenediamine to cause nucleophilic substitution reaction between ethylenediamine and the chloromethyl group on the surface of the CMCPS membrane. Repeated soaking and washing, and vacuum drying, the aminated polysulfone membrane AMPSF was obtained;

[0046] In the third step, in the four-neck flask, add AMPSF membrane and 70 mL of a mixtu...

Embodiment 2

[0051] (1) Preparation of polysulfone side chain grafted polytertiary amine microfiltration membrane

[0052] In the first step, add 0.8g CMPSF and 7mL dimethylacetamide to a four-neck flask, and add 0.2g PEG-400 under stirring conditions, and let it stand for defoaming; pour the solution on a horizontal glass plate, scrape it evenly, and form Uniform and thin layer, quickly put in a water bath, phase inversion into a film; place the film in distilled water for several times of water soaking, after vacuum drying, the CMPSF asymmetric porous base film is obtained;

[0053] In the second step, 1 g of CMPSF asymmetric porous membrane is soaked in ethylenediamine, so that ethylenediamine and the chloromethyl group on the surface of the CMCPS membrane undergo a nucleophilic substitution reaction. After soaking for 15 minutes at 20 ° C, the membrane is taken out and washed with methanol and Distilled water was soaked and washed repeatedly, and vacuum-dried to obtain the aminated pol...

Embodiment 3

[0059] (1) Preparation of polysulfone side chain grafted polytertiary amine microfiltration membrane

[0060] In the first step, add 0.9gCMPSF and 6mL dimethylacetamide to a four-necked flask, and add 0.2gPEG-400 under stirring conditions, and let it stand for degassing; pour the solution on a horizontal glass plate, scrape it evenly, Form a uniform thin layer, quickly put it into a water bath, and phase transform into a film; place the film in distilled water for several times of water soaking, and after vacuum drying, the CMPSF asymmetric porous base film is obtained;

[0061] In the second step, 1 g of CMPSF asymmetric porous membrane is soaked in ethylenediamine, so that ethylenediamine and the chloromethyl group on the surface of the CMCPS membrane undergo a nucleophilic substitution reaction. After soaking for 18 minutes at 22 ° C, the membrane is taken out and washed with methanol and Distilled water was soaked and washed repeatedly, and vacuum-dried to obtain the amina...

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Abstract

The invention belongs to the field of membrane separation and particularly relates to a polysulfone side chain grafted polymerized tertiary amine micro-filtration membrane. The problems that in the prior art, the reject rate on many micromolecular substances is low, consequently, removal of poisonous substances cannot reach the standard, and the operation cost of the nanofiltration technology is high can be solved. According to a preparation method, a phase conversion film forming method is firstly adopted for preparing a chloromethyl polysulfone (CMPSF) asymmetric micro-filtration membrane; then primaquine groups are introduced to the surface of the micro-filtration membrane through surface chemical modification; finally, on the basis of constructing a -NH2 / S2O82-surface initiating system, tertiary amine monomer dimethyl amino ethyl methacrylate (DMAEMA) is grafted and polymerized on the surface of the membrane, and the porous grafted membrane PSF-g-PDMAEMA grafted with functional macromolecular PDMAEMA is prepared. The prepared polysulfone side chain grafted polymerized tertiary amine micro-filtration membrane can efficiently remove two kinds of poisonous anions such as CrO42- and MoO42-.

Description

technical field [0001] The invention belongs to the field of membrane separation, and in particular relates to a polysulfone side chain grafted polytertiary amine microfiltration membrane. The microfiltration membrane has the function of binding anions and is applied to the adsorption and separation of anions in water media. Background technique [0002] As a new separation technology, membrane separation technology has been widely used in industrial production and plays a very important role in modern chemical production, especially in the treatment of industrial wastewater and the protection of water environment, membrane separation technology is very effective One of the technologies, it has the advantages of simple process, high efficiency, energy saving and convenient operation. In industrial wastewater treatment, most of the pressure-driven solid membranes currently used are porous membranes, such as microfiltration, ultrafiltration and nanofiltration membranes. The me...

Claims

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Application Information

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IPC IPC(8): B01D71/78B01D69/02B01D67/00C02F1/44G01N21/31
CPCB01D67/0006B01D69/02B01D71/78B01D2323/38C02F1/44G01N21/31
Inventor 高保娇王蕊欣谢美娜门吉英崔坤俐王晓刚
Owner ZHONGBEI UNIV
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