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Method for preparing antimicrobial polysulfone ultrafiltration membrane

A polysulfone ultrafiltration membrane and antibacterial technology, which is applied in the field of ultrafiltration membrane surface modification, can solve the problems that restrict the wide application of polysulfone ultrafiltration membrane, increase the difficulty and cost of operation, shorten the service life, etc., and achieve good antibacterial Pollution, easy operation, good hydrophilic effect

Active Publication Date: 2012-10-03
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These all shorten the service life of the membrane, reduce the separation effect, and increase the difficulty and cost of operation, which restricts the wide application of polysulfone ultrafiltration membrane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 0.06g of N-(2-hydroxy-3-tert-butyl-5methyl)-acrylamide (MBHBA) and 0.1775g of acrylamide to 24.7g of N,N-dimethylformamide (DMF) aqueous solution, shake to make It dissolves to obtain an organic solution; Take by weighing initiator 0.095g K 2 S 2 o 8 and 0.075g K 2 S 2 o 5 , add to 25g deionized water, shake to dissolve; slowly add the initiator solution to the organic solution; finally put the polysulfone ultrafiltration membrane that has been treated with an ultrasonic cleaner into the reaction solution at 25°C Reaction 1h.

[0023] The grafted membrane was washed three times with deionized water and absolute ethanol, and the anti-pollution and antibacterial experiments were carried out.

[0024] The initial pure water flux of the modified membrane was 101L / (㎡·h), the flux recovery rate was 87%, the rejection rate of bovine serum albumin (BSA) was 93.1%, and the antibacterial rates against Escherichia coli and Staphylococcus aureus were respectively 87.2% a...

Embodiment 2

[0026] Add 0.365g MBHBA and 1.07g acrylamide to 28.6g N,N-dimethylformamide (DMF) aqueous solution, shake to dissolve, and obtain an organic solution; weigh 0.095g K 2 S 2 o 8 and 0.075g K 2 S 2 o 5 , add to 20g deionized water, shake to dissolve; slowly add the initiator solution into the organic solution; finally put the polysulfone ultrafiltration membrane that has been treated with an ultrasonic cleaner into the reaction solution at 25°C Reaction 1h.

[0027] The grafted membrane was washed three times with deionized water and absolute ethanol, and the anti-pollution and antibacterial experiments were carried out.

[0028] The initial pure water flux of the modified membrane was 144L / (㎡·h), the flux recovery rate was 81%, the rejection rate of bovine serum albumin (BSA) was 94.8%, and the antibacterial rates against Escherichia coli and Staphylococcus aureus were respectively 89.1% and 84.7%.

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Abstract

The invention relates to a method for preparing an antimicrobial polysulfone ultrafiltration membrane, which comprises the following steps: preparing a reaction solution containing an initiator, a capsaicin and a hydrophilic monomer, putting a pretreated polysulfone ultrafiltration membrane into the reaction solution for reaction of 0.32-8 hours, and modifying the surface of the pretreated polysulfone ultrafiltration membrane to obtain the antimicrobial polysulfone ultrafiltration membrane. The capsaicin is acrylamide with the derivative structures of capsaicin, the hydrophilic monomer is acrylamide, acrylic acid, methacrylic acid, hydroxyethyl acrylate or p-vinyl benzenesulfonic acid containing olefinic double bonds and hydrophilic groups, and the reaction solution is the mixture of an organic solvent and water. The flux of the ultrafiltration membrane prepared by adopting the method is more than 100L / (m<2>.h), and the ultrafiltration membrane can retain more than 93% of bovine serum albumin and can resist more than 85% of colon bacillus and more than 80% of staphylococcus aureus. The method is easy to operate, and the antibacterial and pollution-resisting properties of the ultrafiltration membrane are improved significantly. The prepared ultrafiltration membrane can be applied to the fields of industrial wastewater treatment, seawater desalination, etc.

Description

Technical field: [0001] The invention relates to a method for preparing an antibacterial ultrafiltration membrane by using a chemical grafting method, in particular to a preparation method for an antibacterial polysulfone ultrafiltration membrane, and belongs to the technical field of ultrafiltration membrane surface modification. Background technique: [0002] Early industrial ultrafiltration was used in wastewater and sewage treatment. With the development of ultrafiltration technology, ultrafiltration membrane technology has been widely used in a wide range of fields, mainly including food industry, beverage industry, dairy industry, biological fermentation, biomedicine, pharmaceutical chemical industry, biological preparations, traditional Chinese medicine preparations, clinical medicine, printing and dyeing wastewater , food industry wastewater treatment, resource recovery and environmental engineering and other fields. Ultrafiltration has many advantages: [0003] 1....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D69/02B01D67/00
Inventor 高学理王剑王振房成王晓娟孙海静
Owner OCEAN UNIV OF CHINA
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