Modification preparation method of ultrafiltration membrane based on bionics and application of ultrafiltration membrane

A technology of ultrafiltration membrane and modifier, applied in the field of membrane separation, which can solve the problems of complex composition, difficult treatment and large emission

Inactive Publication Date: 2018-11-27
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because many industrial wastewaters are difficult to degrade because of their complex composition, variable properties, large discharge volume, and high toxicity, it is difficult to treat them and cause great harm to the environment and human life.

Method used

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  • Modification preparation method of ultrafiltration membrane based on bionics and application of ultrafiltration membrane
  • Modification preparation method of ultrafiltration membrane based on bionics and application of ultrafiltration membrane
  • Modification preparation method of ultrafiltration membrane based on bionics and application of ultrafiltration membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Weigh 0.1wt% of PDA-CS (the mass concentration of CS is 1.2%) and 75 g of N,N-dimethylacetamide are mixed in a conical flask and placed in an ultrasonic disperser for ultrasonic dispersion for 1 h. After dispersing evenly, add 18g of polyethersulfone and 7g of polyvinylpyrrolidone and mix evenly, then place in a water bath, heat at a constant temperature of 75°C and stir magnetically for 12 hours to fully dissolve it, and place it in a vacuum box at 60°C to stand Degassing for 4 hours to remove residual air bubbles in the solution to obtain the casting solution.

[0023] The preparation of the ultrafiltration membrane is carried out by using the method of flat-plate membrane production. First, pour the casting solution on a glass plate of 15 × 25 cm, and then use a glass rod to scrape the ultrafiltration membrane; put the glass plate containing the membrane coating at room temperature Pre-evaporate in air for 40s, and then immerse in a coagulation bath at 30°C, so that ...

Embodiment 2

[0040] Weigh 0.1wt% of PDA-CS (the mass concentration of CS is 1.6%) and 75 g of N,N-dimethylacetamide are mixed in a conical flask and placed in an ultrasonic disperser for ultrasonic dispersion for 1 h. After dispersing evenly, add 18g of polyethersulfone and 7g of polyvinylpyrrolidone and mix evenly, then place in a water bath, heat at a constant temperature of 75°C and stir magnetically for 12 hours to fully dissolve it, and place it in a vacuum box at 60°C to stand Degassing for 4 hours to remove residual air bubbles in the solution to obtain the casting solution.

[0041] The preparation of the ultrafiltration membrane is carried out by using the method of flat-plate membrane production. First, pour the casting solution on a glass plate of 15 × 25 cm, and then use a glass rod to scrape the ultrafiltration membrane; put the glass plate containing the membrane coating at room temperature Pre-evaporate in air for 40s, and then immerse in a coagulation bath at 30°C, so that ...

Embodiment 3

[0046] Weigh 0.1wt% PDA-CS (the mass concentration of CS is 2.0%) and 75 g N,N-dimethylacetamide, mix them in a conical flask and place them in an ultrasonic disperser for ultrasonic dispersion for 1 h. After dispersing evenly, add 18g of polyethersulfone and 7g of polyvinylpyrrolidone and mix evenly, then place in a water bath, heat at a constant temperature of 75°C and stir magnetically for 12 hours to fully dissolve it, and place it in a vacuum box at 60°C to stand Degassing for 4 hours to remove residual air bubbles in the solution to obtain the casting solution.

[0047] The preparation of the ultrafiltration membrane is carried out by using the method of flat-plate membrane production. First, pour the casting solution on a glass plate of 15 × 25 cm, and then use a glass rod to scrape the ultrafiltration membrane; put the glass plate containing the membrane coating at room temperature Pre-evaporate in air for 40s, and then immerse in a coagulation bath at 30°C, so that th...

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Abstract

The invention discloses a modification preparation method of an ultrafiltration membrane based on bionics and application of the ultrafiltration membrane. The preparation method comprises the following steps: preparing strong-adhesiveness and hydrophilic modifying agent dopamine-modified chitosan (PDA-CS), preparing modified film casting liquid, carrying out solvent-nonsolvent phase conversion soas to form a film, and washing the ultrafiltration membrane, so as to obtain the strong-adhesiveness and hydrophilic modified ultrafiltration membrane. The preparation method is short in preparation time and simple in process, the prepared modified ultrafiltration membrane is used for the treatment of coking wastewater, and obvious effects are achieved in aspects of a film contact angle and a fluerecovery rate (FRR). Therefore, the modification preparation has very good application prospects in the treatment of industrial wastewater.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and in particular relates to a preparation method of polydopamine-modified chitosan (PDA-CS) with strong adhesion and hydrophilicity modifier and its application in the improvement of polyethersulfone ultrafiltration membrane Permanent preparation, and the application of the modified ultrafiltration membrane in the coking wastewater treatment process. Background technique [0002] Water is the basic material for our human survival and life. All life activities originate from water and depend on water. Therefore, water is also called the source of life. The total amount of fresh water resources in China is very large, and the population base is also large, so China is also a country with severe water shortage. However, with the continuous growth of population, the gradual acceleration of industrialization and the rapid economic development in recent decades, the discharge of domestic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00B01D67/00B01D69/02B01D69/06B01D71/68C02F1/44
CPCB01D67/0011B01D67/0013B01D69/02B01D69/06B01D71/68B01D2323/02B01D2325/36C02F1/444C08G81/00
Inventor 欧阳曙光冯驰刘兆越刘佳成
Owner WUHAN UNIV OF SCI & TECH
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