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Aromatic polyamide composite RO (reverse osmosis) membrane grafted with fluorocarbon materials and aminoglycoside antibiotics as well as preparation method

A technology of aminoglycosides and aromatic polyamides, applied in chemical instruments and methods, reverse osmosis, semi-permeable membrane separation, etc., to achieve excellent anti-pollution performance, low cost, and easy implementation

Active Publication Date: 2017-06-13
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Using single or two anti-pollution strategies of "pollution resistance", "pollution repellent" and "contact sterilization" can effectively alleviate the problem of membrane fouling. However, considering the complexity of water pollutants and the single or two synergistic anti-pollution strategies Due to the limitations of the strategy, the anti-fouling research of reverse osmosis membranes still has a long way to go
At present, there is no report on the preparation of reverse osmosis membranes with triple anti-pollution functions by synergizing the triple anti-pollution strategy of "pollution resistance", "pollution repellence" and "contact sterilization"

Method used

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  • Aromatic polyamide composite RO (reverse osmosis) membrane grafted with fluorocarbon materials and aminoglycoside antibiotics as well as preparation method
  • Aromatic polyamide composite RO (reverse osmosis) membrane grafted with fluorocarbon materials and aminoglycoside antibiotics as well as preparation method
  • Aromatic polyamide composite RO (reverse osmosis) membrane grafted with fluorocarbon materials and aminoglycoside antibiotics as well as preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Prepare a solution containing hexafluorobutyl methacrylate with a molar concentration of 0.05mol / L and bromo-3,4-dimethoxyacetophenone initiator solution with a molar concentration of 0.001mol / L; immerse the surface of the nascent reverse osmosis membrane in the above After being immersed in the solution for 5 seconds, take out the reverse osmosis membrane and initiate grafting under ultraviolet light for 10 seconds; then immerse the surface of the reverse osmosis membrane in a tobramycin solution with a molar concentration of 0.005 mol / L for 1 minute, and finally dry the membrane to obtain Polyhexafluorobutyl methacrylate and tobramycin modified aromatic polyamide composite reverse osmosis membrane. Electron microscope pictures such as image 3 shown.

[0022] At 1.55MPa and 25°C, the initial permeate flux and salt rejection rate of polyhexafluorobutyl methacrylate and tobramycin modified aromatic polyamide composite reverse osmosis membrane were tested by using 2000m...

Embodiment 2

[0028]Prepare a solution containing octafluoropentyl methacrylate with a molar concentration of 0.2mol / L and bromo-3,4-dimethoxyacetophenone initiator solution of 0.1mol / L; immerse the surface of the nascent reverse osmosis membrane in the above-mentioned In the solution for 30s, take out the membrane and initiate grafting under a UV lamp for 5min; then immerse the surface of the reverse osmosis membrane in kanamycin with a molar concentration of 0.1mol / L for 20s, and finally dry the membrane to obtain methacrylic acid Aromatic polyamide composite reverse osmosis membrane modified by octafluoropentyl ester and kanamycin. Electron microscope pictures such as Figure 4 shown.

[0029] At 1.55MPa and 25°C, the initial permeate flux and salt rejection rate of the aromatic polyamide composite reverse osmosis membrane modified by octafluoropentyl methacrylate and kanamycin were tested by using 2000mg / L sodium chloride aqueous solution, respectively. 45L / (m 2 • h) and 99.1%.

[0...

Embodiment 3

[0035] Prepare a solution containing trifluoroethyl methacrylate with a molar concentration of 0.1mol / L and bromo-3,4-dimethoxyacetophenone initiator solution at 0.05mol / L; immerse the surface of the nascent reverse osmosis membrane in the above After 5 minutes in the solution, take out the membrane and initiate grafting under ultraviolet light for 1 minute; then immerse the surface of the reverse osmosis membrane in gentamicin with a molar concentration of 0.008mol / L for 5 minutes, and finally dry the membrane to obtain methacrylic acid Aromatic polyamide composite reverse osmosis membrane modified by trifluoroethyl ester and gentamicin. Electron microscope pictures such as Figure 5 shown.

[0036] At 1.55MPa and 25°C, the initial permeate flux and salt rejection rate of trifluoroethyl methacrylate and gentamicin modified aromatic polyamide composite reverse osmosis membrane were tested by using 2000mg / L sodium chloride aqueous solution as 55L / (m 2 • h) and 99.1%.

[003...

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Abstract

The invention relates to an aromatic polyamide composite RO (reverse osmosis) membrane grafted with fluorocarbon materials and aminoglycoside antibiotics as well as a preparation method. The method comprises the steps as follows: a solution containing fluorocarbon materials with the molar concentration being 0.05-0.2 mol / L and a bromo-3,4-dimethoxy acetophenone initiator with molar concentration being 0.001-0.1 mol / L is prepared; the surface of a primary RO membrane is immersed in the solution, the membrane is taken out, and grafting is initiated under an ultraviolet lamp; the surface of the RO membrane is immersed in an aminoglycoside antibiotic solution, finally, the membrane is dried, and the RO membrane is composited. The permeation selectivity of the unmodified aromatic polyamide composite RO membrane is kept; the aromatic polyamide composite RO membrane has the characteristics of low flux attenuation degree of a low-surface-energy material modified membrane and high flux recovery rate of a hydrophilic material modified membrane. The aromatic polyamide composite RO membrane grafted with the fluorocarbon materials and aminoglycoside antibiotics has excellent antibacterial performance and triple anti-fouling functions after being contacted with bacillus subtilis or Escherichia coli.

Description

technical field [0001] The invention relates to an aromatic polyamide composite reverse osmosis membrane modified by a low surface energy material and a hydrophilic bactericide and a preparation method thereof, in particular to an aromatic polyamide composite reverse osmosis grafted with fluorocarbon materials and aminoglycoside antibiotics A membrane and a preparation method thereof; belonging to the field of composite reverse osmosis membrane preparation. Background technique [0002] Membrane fouling has always been a key problem restricting the development of aromatic polyamide composite reverse osmosis membrane technology, among which membrane biofouling is the most serious. [0003] Membrane fouling is usually measured by two indicators, the degree of flux attenuation and the rate of flux recovery. The core of improving the anti-fouling performance of reverse osmosis membrane is to reduce the interaction between various pollutants and the membrane surface. By improvi...

Claims

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Application Information

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IPC IPC(8): B01D71/78B01D69/12B01D69/02B01D67/00B01D61/02
CPCB01D61/025B01D67/0006B01D69/02B01D69/12B01D71/78B01D2325/48
Inventor 王志王耀王纪孝王世昌
Owner TIANJIN UNIV
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