Preparation method of modified polyether sulfone functional gradient composite membrane

A polyethersulfone, modified technology, applied in the field of preparation of modified polyethersulfone functional gradient composite membrane, can solve the problems of poor effect of high-concentration heavy metal wastewater, unsatisfactory heavy metal adsorption efficiency of the adsorption layer, etc.

Active Publication Date: 2018-12-07
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nanofiltration membrane has high permeability selectivity, good oxidation resistance and pollution resistance, and its interception effect on low-concentration heavy metal ion wastewater is obvious, but its effect on high-concentration heavy metal ion wastewater treatment is not good.
In addition, it has been reported that polyethersulfone with chloroacetyl groups is prepared first, and then the polyethersulfone with chloroacetyl groups is reacted with polyvinylamines such as tetraethylenepentamine to prepare polyvinylamine groups. Then, the polyvinylamine group of the separation me

Method used

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  • Preparation method of modified polyether sulfone functional gradient composite membrane
  • Preparation method of modified polyether sulfone functional gradient composite membrane
  • Preparation method of modified polyether sulfone functional gradient composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) The primary chloroacetylation treatment process of polyethersulfone:

[0051] First, pour 8g of polyethersulfone powder and 130g of chloroform into a three-necked round-bottomed flask, and fix the three-necked round-bottomed flask on a magnetic stirrer. The absorption tube filled with activated carbon particles is used to absorb the chloroform volatilized by the reaction, and the middle mouth is sealed with a ground glass stopper. After fixing the three-necked round-bottom flask, slowly adjust the speed of the stirrer to 200r / min, and stir the three-necked round-bottomed flask. solution in the bottom flask for 30 minutes; when the powdery polyethersulfone becomes a fluffy block in chloroform, adjust the stirrer speed to 550r / min, and continue to magnetically stir the solution at room temperature until the fluffy block polyethersulfone dissolves in trichloromethane In methane solvent; after the fluffy block polyethersulfone is completely dissolved, open the valve on ...

Embodiment 2

[0068] (1) The primary chloroacetylation treatment process of polyethersulfone:

[0069]First, pour 8g of polyethersulfone powder and 133g of chloroform into a three-necked round-bottomed flask, and fix the three-necked round-bottomed flask on a magnetic stirrer. The absorption tube filled with activated carbon particles is used to absorb the chloroform volatilized by the reaction, and the middle mouth is sealed with a ground glass stopper. After fixing the three-necked round-bottom flask, slowly adjust the speed of the stirrer to 200r / min, and stir the three-necked round-bottomed flask. The solution in the bottom flask was kept for 30 minutes; when the powdered polyethersulfone became a fluffy block in chloroform, adjust the stirrer speed to 550r / min, and continue to magnetically stir the solution at room temperature until the fluffy block polyethersulfone was dissolved in trichloromethane. In methane solvent; after the fluffy block polyethersulfone is completely dissolved, o...

Embodiment 3

[0085] (1) The primary chloroacetylation treatment process of polyethersulfone:

[0086] First, pour 8g of polyethersulfone powder and 136g of chloroform into a three-necked round-bottomed flask, and fix the three-necked round-bottomed flask on a magnetic stirrer. The absorption tube filled with activated carbon particles is used to absorb the chloroform volatilized by the reaction, and the middle mouth is sealed with a ground glass stopper. After fixing the three-necked round-bottom flask, slowly adjust the speed of the stirrer to 200r / min, and stir the three-necked round-bottomed flask. The solution in the bottom flask was kept for 30 minutes; when the powdered polyethersulfone became a fluffy block in chloroform, adjust the stirrer speed to 550r / min, and continue to magnetically stir the solution at room temperature until the fluffy block polyethersulfone was dissolved in trichloromethane. In methane solvent; after the fluffy block polyethersulfone is completely dissolved, ...

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Abstract

Disclosed is a preparation method of a modified polyether sulfone functional gradient composite membrane. The preparation method mainly includes the following steps: firstly, twice chloroacetylation treatment are carried out on polyether sulfone; secondly, the chloroacetylated polyethersulfone and diethylene triamine pentaacetic acid and diethylenetriamine are subjected to a chemical bonding reaction to prepare a membrane casting solution for a polyether sulfone functional separation membrane with a polyaminocarboxylic acid functional group; thirdly, a membrane is formed by using a phase transfer technology; and finally, the surface of the separation membrane is coated with a polyethyleneimine/piperazine aqueous solution and a trimesoyl chloride n-heptane solution, and a dense nanofiltration ultrathin layer is formed by an interfacial polymerization reaction, which is the modified polyether sulfone functional gradient composite membrane. The method of the invention is simple and feasible, the coating process of the nanofiltration ultrathin layer is environmentally friendly, the prepared polyether sulfone functional gradient separation membrane realizes gradient treatment of pollutants, and water contaminated by heavy metals with high concentration can be directly discharged because the water reaches the standard or reused after being treated by the polyether sulfone functionalgradient separation membrane, thereby effectively reducing the construction cost. The modified polyether sulfone functional gradient composite membrane has good engineering application prospects.

Description

technical field [0001] The invention relates to a preparation method of a separation membrane, in particular to a preparation method of a modified polyethersulfone functional gradient composite membrane. Background technique [0002] In recent years, with the rapid growth of the national economy, it is objectively required that the progress and improvement of industries such as industrial development and intelligent manufacturing must be in step with it. The industrial fields represented by electric power, metallurgy, precision manufacturing, petrochemical, textile, and thermal power use water A sharp increase in the amount of heavy metal pollutants has resulted in an increase in the discharge of wastewater containing heavy metal pollutants, resulting in more serious heavy metal water pollution. Heavy metal pollutants such as lead, copper, mercury, nickel, and cadmium in water bodies are volatile in form and cannot be degraded by microorganisms, but can be passed through the...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D67/00B01D61/02
CPCB01D61/027B01D67/0006B01D67/0093B01D67/0095B01D71/68B01D2321/28
Inventor 宋来洲陈欢王秀丽吉敏李希达郁长天牛倩倩
Owner YANSHAN UNIV
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