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Composite flat-sheet polysulfone membrane doped with active carbon and nanometer zinc oxide and preparation method thereof

A technology of nano-zinc oxide and activated carbon, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as membrane pollution, achieve the effects of improving hydrophilicity, strong practical applicability, and reducing production costs

Inactive Publication Date: 2013-03-20
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at the same time, it also brings new problems, among which membrane fouling is a prominent problem.

Method used

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  • Composite flat-sheet polysulfone membrane doped with active carbon and nanometer zinc oxide and preparation method thereof
  • Composite flat-sheet polysulfone membrane doped with active carbon and nanometer zinc oxide and preparation method thereof
  • Composite flat-sheet polysulfone membrane doped with active carbon and nanometer zinc oxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) A preparation method of a composite flat polysulfone membrane doped with activated carbon and nano-zinc oxide of the present invention:

[0022] In the first step, the activated carbon and nano-zinc oxide were cleaned with deionized water, and then centrifuged after ultrasonication for 40 minutes. The polysulfone was washed with deionized water and ultrasonically for 40 minutes. In the drying box, the drying time is 24h.

[0023] In the second step, take nano-zinc oxide, activated carbon, polysulfone, and 1-methyl-2-pyrrolidone at a mass percentage of 0.5:5:20:100 to prepare a casting solution: take 100g of 1-methyl-2-pyrrolidone and place it in a conical bottle; then put 0.5g of nano-zinc oxide in the above-mentioned conical flask, disperse and stir evenly through ultrasonic vibration; then place 5g of activated carbon in the above-mentioned conical flask, disperse and stir evenly through ultrasonic vibration; finally put 20g polysulfone The particles were placed ...

Embodiment 2

[0030] (1) A preparation method of a composite flat polysulfone membrane doped with activated carbon and nano-zinc oxide of the present invention:

[0031] In the first step, the activated carbon and nano-zinc oxide were cleaned with deionized water, and then centrifuged after ultrasonication for 40 minutes. The polysulfone was washed with deionized water and ultrasonically for 40 minutes. In the drying box, the drying time is 24h.

[0032] In the second step, take nano-zinc oxide, activated carbon, polysulfone, and 1-methyl-2-pyrrolidone at a mass percentage of 1:5:20:100 to prepare a casting solution: take 100g of 1-methyl-2-pyrrolidone in 250ml Erlenmeyer flask; then 1g of nano zinc oxide is placed in the above-mentioned conical flask, dispersed and stirred uniformly through ultrasonic vibration; then 5g of activated carbon is placed in the above-mentioned conical flask, dispersed and uniformly stirred through ultrasonic vibration; finally 20g poly The sulfone particles we...

Embodiment 3

[0039] (1) Preparation method of composite flat polysulfone membrane only doped with activated carbon

[0040] In the first step, the activated carbon is cleaned with deionized water, and then centrifuged after ultrasonication for 40 minutes, then the polysulfone is washed with deionized water, ultrasonicated for 40 minutes, and then the activated carbon and polysulfone are placed in a vacuum drying oven at 80°C for 24 hours. .

[0041] In the second step, take activated carbon, polysulfone, and 1-methyl-2-pyrrolidone to prepare a casting solution with a mass percentage of 1:4:20: take 100g of 1-methyl-2-pyrrolidone and place it in a 250ml Erlenmeyer flask; Put 5g of activated carbon in the above-mentioned conical flask, disperse and stir evenly through ultrasonic vibration; finally put 20g of polysulfone particles in the above-mentioned conical flask, stir on a magnetic stirrer at 60°C for 8h until the solution is completely dissolved; put the dissolved The solution was plac...

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Abstract

The invention discloses a composite flat-sheet polysulfone membrane doped with active carbon and nanometer zinc oxide and a preparation method. The preparation steps are as follows: mixing nanometer zinc oxide, active carbon particles, polysulfone and 1-methyl-2-pyrrolidone in a mass ratio of (0.5-1) to 5 to 20 to 100; ultrasonically oscillating and dispersing the components; stirring the mixture until the components are completely dissolved, de-foamed and membrane-pushed; standing the pushed membrane in the air for 15-20 seconds, then soaking the membrane to a water coagulating bath for 20 minutes, putting the soaked membrane to deionized water to soak for 3 days and then taking out the soaked membrane. The composite flat-sheet polysulfone membrane provided by the invention can improve anti-pollution and adsorption performances of the membrane, and further can carry out photocatalysis under ultraviolet irradiation to effectively remove degradation-resistant pollutants in the water.

Description

technical field [0001] The invention relates to a composite flat polysulfone membrane and a preparation method thereof, in particular to a composite flat polysulfone membrane doped with active carbon and nanometer zinc oxide and a preparation method thereof. Background technique [0002] Membrane separation technology has developed rapidly in recent years because of its simple separation process, fast separation speed, high separation precision, energy saving, long service life, convenient operation, and wide application fields. Bisphenol A polysulfone has excellent mechanical properties, high rigidity, wear resistance, high strength, can maintain excellent mechanical properties even at high temperatures, high thermal stability, hydrolysis resistance, good dimensional stability, small molding shrinkage, no Toxicity, radiation resistance, good chemical stability. Polysulfone membrane inherits the characteristics of polysulfone itself, not only has excellent permeability, but...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D67/00
Inventor 李轶吴悦王晴王玉明王大伟胡磊
Owner HOHAI UNIV
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