Preparation method of antibacterial polypiperazine-amide nanofiltration membrane

An antibacterial, polypiperazine technology is applied in the field of preparation of antibacterial polypiperazine amide nanofiltration membranes, which can solve problems such as fouling membranes, achieve easy operation, simple preparation method, improve pollution resistance and The effect of service life

Inactive Publication Date: 2013-08-28
HANGZHOU WATER TREATMENT TECH DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the practical application of nanofiltration membrane, there

Method used

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  • Preparation method of antibacterial polypiperazine-amide nanofiltration membrane
  • Preparation method of antibacterial polypiperazine-amide nanofiltration membrane
  • Preparation method of antibacterial polypiperazine-amide nanofiltration membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Configure a mass concentration of 0.2% trimesoyl chloride (TMC) and a mass concentration of 0.005% 2,4,6-trichlorophenoxycarbonyl chloride mixed uniform IsoparG oil solution; the polysulfone base film is immersed in a mass concentration of 0.1 % piperazine aqueous solution (containing sodium dodecylsulfonate with a mass concentration of 0.008%) for 80s, take it out and dry it in the air, wherein; after the solution is dried, contact with the mixed organic phase solution for 40s; The sheet was placed in a vacuum oven at 90° C. for 10 minutes and then taken out.

[0016] Use 2000ppm of sodium sulfate aqueous solution and sodium chloride aqueous solution to test the initial performance of the membrane under 1MPa pressure. 2 SO 4 The desalination rates of NaCl and NaCl are 98.7% and 51.9%, respectively, and the flux is 58.56L / m 2 .h.

Embodiment 2

[0018] Membrane antibacterial performance test: According to the guiding principles of the second part of the "Chinese Pharmacopoeia" 2010 edition microbial limit, a certain CFU of bacterial liquid is fixed on the membrane sample to be tested by the method of filtration, and then pasted on a suitable medium. After 24 hours of cultivation, the membrane was removed, printed and dyed to a disposable sterile filter membrane, and the filter membrane was transferred to a culture plate for 48 hours according to the method of microbial limit determination, and the antibacterial activity of the membrane was investigated by microbial counting.

[0019] Test results: The contact inhibition rate of the membrane against Aspergillus niger was 52.1%, and the contact inhibition rate against Escherichia coli was 53.7%.

Embodiment 3-4

[0021] Change the amount of trimesoyl chloride added in the oil phase, and the other steps are the same as in Example 1 to prepare a composite film and test it. The results are as follows:

[0022]

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PUM

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Abstract

The invention relates to a preparation technique of a nanofiltration membrane, particularly a preparation method of an antibacterial polypiperazine-amide nanofiltration membrane, which comprises the following steps: by using IsoparG oil as a solvent and trimesoyl chloride and 2,4,6-trichlorophenyloxyformyl chloride as solutes, immersing a polysulfone base membrane in a piperazidine water solution, taking out, and airing, wherein the piperazidine water solution contains sodium dodecylsulfate; and after airing the solution, contacting a mixed organic phase solution, keeping the treated membrane in a 90 DEG C vacuum drying oven for 10 minutes, and taking out. The prepared membrane has strong antibacterial function, and the formed stable covalent bond structure can not be easily lost in the use process of the nanofiltration membrane, thereby enhancing the fouling resistance and service life of the membrane. The preparation method is simple, and easy to operate.

Description

technical field [0001] The invention relates to a preparation process of a nanofiltration membrane, in particular to a preparation method of a bacteriostatic polypiperazine amide nanofiltration membrane. technical background [0002] Nanofiltration membrane is a new membrane separation technology between ultrafiltration and reverse osmosis. Its technical feature is to achieve selective permeation of dissolved components through steric hindrance and electrostatic interaction. In the practical application of nanofiltration membrane, there is a problem of bacteria breeding and contaminating the membrane. The conventional countermeasure is to regularly sterilize the membrane and clean it with special chemicals. [0003] Improving the antibacterial performance of the membrane itself through the optimization of membrane materials can not only reduce the amount of bactericide, but also improve the operational stability of nanofiltration membranes in engineering applications. Inc...

Claims

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Application Information

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IPC IPC(8): B01D71/56B01D69/12B01D67/00
Inventor 周勇翟丁高从堦
Owner HANGZHOU WATER TREATMENT TECH DEV CENT
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