Preparation method of super-hydrophilic anti-fouling antibacterial separation membrane for efficiently separating oil-water emulsion

A technology for separating oil and water and emulsion, applied in separation methods, liquid separation, semi-permeable membrane separation, etc., can solve problems such as hindering the wide application of membrane technology, improve antifouling and antibacterial properties, shorten reaction time, and improve hydrophilicity. sexual effect

Inactive Publication Date: 2021-02-19
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Membrane fouling is the main problem hindering the widespread application of membrane technology, and it is also the most challenging part of separation technology.

Method used

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  • Preparation method of super-hydrophilic anti-fouling antibacterial separation membrane for efficiently separating oil-water emulsion
  • Preparation method of super-hydrophilic anti-fouling antibacterial separation membrane for efficiently separating oil-water emulsion
  • Preparation method of super-hydrophilic anti-fouling antibacterial separation membrane for efficiently separating oil-water emulsion

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Embodiment 1

[0028] A method for preparing a super-hydrophilic antifouling and antibacterial separation membrane for efficiently separating oil-water emulsions, comprising the following steps:

[0029] 1) Add tobramycin and ammonium persulfate to the dissolved Tris-HCl buffer solution (pH=8.5), shake and oscillate evenly, add dopamine hydrochloride, and obtain the mixed solution a after ultrasonic dissolution; the mixed solution a The concentration of tobramycin in the medium is 2.2×10 -2 mol / L, the concentration of ammonium persulfate is 2.8×10 -2 mol / L, the concentration of dopamine hydrochloride is 1.1×10 -2 mol / L.

[0030] 2) Put the PVDF porous base membrane in the mold, slowly pour the mixed solution a into the mold, fix the mold in a constant temperature oscillation box at 25 °C for reaction, take it out after 0.25 h of reaction, and rinse it several times with deionized water , until the residual liquid on the membrane is washed, and the super-hydrophilic, antifouling and ant...

Embodiment 2

[0033] A method for preparing a super-hydrophilic antifouling and antibacterial separation membrane for efficiently separating oil-water emulsions, comprising the following steps:

[0034] 1) Add tobramycin and CuSO to dissolved Tris-HCl buffer (pH=8.5) 4 / H 2 o 2 After shaking and oscillating evenly, add dopamine hydrochloride, and after ultrasonic dissolution is complete, a mixed solution a can be obtained; the concentration of tobramycin in the mixed solution a is 1.1×10 -2 mol / L, CuSO 4 / H 2 o 2 The concentration is 1.1×10 -2 mol / L, the concentration of dopamine hydrochloride is 1.1×10 -2 mol / L.

[0035]2) Put the PVDF porous base membrane in the mold, slowly pour the mixed liquid a into the mold, fix the mold in a constant temperature oscillation box at 20 °C for reaction, take it out after 0.5 h of reaction, and rinse it with deionized water several times , until the residual liquid on the membrane is washed, and the super-hydrophilic, antifouling and antibact...

Embodiment 3

[0038] A method for preparing a super-hydrophilic antifouling and antibacterial separation membrane for efficiently separating oil-water emulsions, comprising the following steps:

[0039] 1) Add tobramycin and sodium periodate to the dissolved Tris-HCl buffer solution (pH=8.5), shake and oscillate evenly, then add dopamine hydrochloride, and after ultrasonic dissolution is complete, the mixture a can be obtained; the mixture a The concentration of tobramycin in the medium is 4.4×10 -2 mol / L, the concentration of sodium periodate is 5.8×10 -3 mol / L, the concentration of dopamine hydrochloride is 1.1×10 -2 mol / L.

[0040] 2) Put the PVDF porous base membrane in the mold, slowly pour the mixed solution a into the mold, fix the mold in a constant temperature oscillation box at 25 °C for reaction, take it out after 1 hour of reaction, and rinse it several times with deionized water , until the residual liquid on the membrane is washed, and the super-hydrophilic, antifouling ...

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Abstract

The invention discloses a preparation method of a super-hydrophilic anti-fouling antibacterial separation membrane for efficiently separating oil-water emulsion. Dopamine and tobramycin react on the surface of the polyvinylidene fluoride base membrane, and an extremely thin composite hydrophilic layer is deposited so that the infiltration characteristic of the membrane is essentially changed, thesuper-hydrophilic/underwater super-oleophobic wetting characteristic is shown, and the anti-fouling performance of the membrane is greatly improved; meanwhile, due to the introduction of tobramycin, the super-hydrophilic separation membrane is endowed with excellent antibacterial performance.

Description

technical field [0001] The invention belongs to the technical field of environmental protection materials, and in particular relates to a preparation method of a super-hydrophilic, anti-fouling and anti-bacterial separation membrane for efficiently separating oil-water emulsions. Background technique [0002] In the 21st century, water resources are becoming a precious and scarce resource. With the increasing shortage of fresh water resources, nearly 3 billion people in the world are facing the problem of fresh water shortage. The recycling of water resources has become an imminent question. In petrochemical, metallurgy, food processing and pharmaceutical manufacturing industries, a large amount of oily wastewater is produced every year, and the resource utilization of this part of water has become a huge challenge for human beings. [0003] With the rapid development of membrane separation technology, its application has been in various fields such as industry, medical tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D71/34B01D69/02B01D17/022
CPCB01D17/02B01D17/085B01D67/0006B01D69/02B01D71/34B01D2323/02B01D2325/36B01D2325/48
Inventor 林久养余子健刘日日
Owner FUZHOU UNIV
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