Preparation method of modified polyether sulfone functional gradient separating films

A polyethersulfone membrane and functional separation technology, applied in semi-permeable membrane separation, chemical instruments and methods, membranes, etc., can solve problems such as inability to effectively guarantee direct discharge, and achieve the effect of avoiding difficult recovery and easy loss.

Active Publication Date: 2018-02-23
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies of the existing technology, especially for the engineering problem that the nanofiltration membrane technology can not effectively guarantee the direct discharge of high-concentration heavy metal wastewater and high-concentration phosphate wastewater, the purpose of the present invention is to provide a method that can effectively treat high-concentration heavy metal wastewater and high-concentration phosphate wastewater. Preparation method of modified polyethersulfone functional gradient separation membrane for concentrated phosphate wastewater

Method used

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  • Preparation method of modified polyether sulfone functional gradient separating films
  • Preparation method of modified polyether sulfone functional gradient separating films
  • Preparation method of modified polyether sulfone functional gradient separating films

Examples

Experimental program
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Effect test

Embodiment 1

[0049] (1) Preparation and pulverization of aminated polyethersulfone separation membrane:

[0050] First, carry out chloroacetylation treatment on polyethersulfone: first add 135g of chloroform and 6g of polyethersulfone powder into a three-neck round bottom flask, stir magnetically at room temperature to completely dissolve it, and then use a dropper to drop 6g of chloroacetyl chloride Add it to the above solution, and then magnetically stir it for 15 minutes, then ultrasonically shake the solution for 20 minutes at 20°C to make polyethersulfone and chloroacetyl chloride fully react in the chloroform solvent; then magnetically stir again, while heating the solution After reaching 45°C, add 4.2g of anhydrous aluminum trichloride, and continue the magnetic stirring reaction for 6h. During the whole process of the reaction, the solution needs to be protected by nitrogen gas; Water and ethanol were poured into the three-necked round-bottomed flask, and a large amount of white so...

Embodiment 2

[0065] (1) Preparation and pulverization of aminated polyethersulfone separation membrane:

[0066] First, carry out chloroacetylation treatment on polyethersulfone: first add 135g of chloroform and 6g of polyethersulfone powder into a three-neck round bottom flask, stir magnetically at room temperature to completely dissolve it, and then use a dropper to drop 6g of chloroacetyl chloride Add it to the above solution, and then stir it magnetically for 10 minutes, then shake the solution ultrasonically for 20 minutes at 25°C to make polyethersulfone and chloroacetyl chloride fully react in the chloroform solvent; then magnetically stir again, while heating the solution After reaching 40°C, add 4.2g of anhydrous aluminum trichloride, and continue the magnetic stirring reaction for 6h. During the whole process of the reaction, the solution needs to be protected by nitrogen gas; Water and ethanol were poured into the three-necked round-bottomed flask, and a large amount of white so...

Embodiment 3

[0080] (1) Preparation and pulverization of aminated polyethersulfone separation membrane:

[0081] First, carry out chloroacetylation treatment on polyethersulfone: first add 135g of chloroform and 6g of polyethersulfone powder into a three-neck round bottom flask, stir magnetically at room temperature to completely dissolve it, and then use a dropper to drop 6g of chloroacetyl chloride Add it to the above solution, and then stir it magnetically for 10 minutes, then shake the solution ultrasonically for 20 minutes at 25°C to make polyethersulfone and chloroacetyl chloride fully react in the chloroform solvent; then magnetically stir again, while heating the solution After reaching 40°C, add 4.2g of anhydrous aluminum trichloride, and continue the magnetic stirring reaction for 6h. During the whole process of the reaction, the solution needs to be protected by nitrogen gas; Water and ethanol were poured into the three-necked round-bottomed flask, and a large amount of white so...

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Abstract

The invention discloses a preparation method of modified polyether sulfone functional gradient separating films. The preparation method includes preparing and crushing aminated polyether sulfone separating films; subjecting aminated polyether sulfone separating film scraps, methyl acrylate and ethanediamine to Michael addition and amidation, loading arborization polyamide-amine function groups into the film scraps, and preparing modified polyether sulfone functional separating films with the arborization polyamide-amine function groups by a phase transfer technique; taking chitosan acetic acidliquor and trimesoyl chloride normal hexane liquor as a water phase and an organic phase respectively, and forming nanofiltration aromatic amide ultrathin layers on the surfaces of the modified polyether sulfone functional separating films through interfacial polymerization to obtain the modified polyether sulfone functional gradient separating films. The preparation method has the advantages that the method is simple and convenient to operate, and the coating process of the nanofiltration ultrathin layers is green and environment friendly; the prepared separating films effectively integratetreatment effects of micro ultrafiltration chelating film adsorption and nanofiltration film interception, and direct discharge and reuse of waste water containing high-concentration heavy metal and phosphate pollutants after treatment are guaranteed.

Description

technical field [0001] The invention relates to a preparation method of a separation membrane. Background technique [0002] With the rapid development of chemical industry, medicine, food, petrochemical, microelectronics, precision manufacturing and other industries, the problem of water pollution is becoming more and more serious. Among them, heavy metal pollution and water eutrophication deserve special attention. Heavy metal pollution and water eutrophication have caused serious harm to aquatic ecosystems and human health. Effective removal of heavy metal pollutants in the water environment and effective prevention and control of eutrophication are important measures for water pollution prevention and control. [0003] The main methods used to remove heavy metal pollutants and nitrogen and phosphorus nutrients in wastewater include: chemical precipitation, ion exchange and adsorption, biological adsorption and enrichment, biological methods, and membrane separation tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D69/02B01D67/00C02F1/28C02F1/44C02F101/20C02F101/10
CPCB01D67/0009B01D69/02B01D71/68B01D2311/2626B01D2323/46C02F1/285C02F1/442C02F2101/105C02F2101/20
Inventor 宋来洲刘培王秀丽吉敏王进博高佳丽
Owner YANSHAN UNIV
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