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High-flux antibacterial anti-pollution polymer separation membrane and preparation method thereof

A technology for separating membranes and polymers, applied in the field of membrane separation, can solve the problems of poor antibacterial stability of antibacterial membranes, unable to maintain the antibacterial effect for a long time, and the antibacterial effect needs to be improved, so as to achieve good antibacterial and antifouling effect and continuous and stable antibacterial and antifouling effect. , the effect of improving hydrophilicity and water flux

Inactive Publication Date: 2019-07-05
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The Chinese invention patent with the publication number CN107149885A discloses a preparation method of an antibacterial and anti-biological fouling polymer separation membrane. The method uses silicification to grow nano-silica carriers in situ on the surface of the polymer separation membrane and then cross-links them through chemical bonds. Fix the quaternary ammonium salt to obtain a polymer separation membrane with antibacterial properties, but the antibacterial membrane prepared by this method has poor antibacterial stability, the antibacterial effect cannot be maintained for a long time, and its antibacterial effect still needs to be improved

Method used

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  • High-flux antibacterial anti-pollution polymer separation membrane and preparation method thereof
  • High-flux antibacterial anti-pollution polymer separation membrane and preparation method thereof
  • High-flux antibacterial anti-pollution polymer separation membrane and preparation method thereof

Examples

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Embodiment 1

[0032] A method for preparing a high-throughput antibacterial and antifouling polymer separation membrane, comprising the steps of:

[0033] (1) Dissolve 400 mg of dopamine and 400 mg of polyethyleneimine in 200 mL of Tris-HCl buffer solution with a pH of about 8, and pour it into a mold equipped with a polyvinylidene fluoride separation membrane to react to obtain surface-activated polyvinylidene fluoride Separation membrane;

[0034] (2) Add 1.5mL orthosilicate methyl ester to 100mL 1mmol / L HCl solution, mix with 100mL phosphate buffer solution with a pH value of about 5.5 after stirring for 15min, and then mix with the separation membrane obtained in step (1) at room temperature React for 6 hours to obtain a polyvinylidene fluoride membrane separation membrane with nano silicon dioxide deposited on the surface;

[0035] (3) Soak the separation membrane obtained in step (2) in 100 mL of dichloromethane, add 2 mL of triethylamine and 2 mL of 2-bromoisobutyryl bromide, perfor...

Embodiment 2

[0044] A method for preparing a high-throughput antibacterial and antifouling polymer separation membrane, comprising the steps of:

[0045] (1) 800 mg of tannic acid was dissolved in 200 mL of Tris-HCl buffer solution with a pH of about 8, and poured into a mold equipped with a polyvinylidene fluoride separation membrane to react to obtain a surface-activated polyvinylidene fluoride separation membrane;

[0046] (2) Add 1.5mL tetraethyl orthosilicate to 100mL 1mmol / L HCl solution, mix with 100mL phosphate buffer with a pH value of about 5.5 after stirring for 15min, and then mix with the separation membrane obtained in step (1) at room temperature React for 6 hours to obtain a polyvinylidene fluoride separation membrane with nano silicon dioxide deposited on the surface;

[0047] (3) Soak the separation membrane obtained in step (2) in 100 mL of toluene, add 2 mL of 2-methoxypyridine and 2 mL of methyl 2-bromopropionate, perform a deoxygenation operation on the reaction syste...

Embodiment 3

[0051] A method for preparing a high-throughput antibacterial and antifouling polymer separation membrane, comprising the steps of:

[0052] (1) Dissolve 400 mg of dopamine and 400 mg of tannic acid in 200 mL of Tris-HCl buffer solution with a pH of about 8, and pour it into a mold equipped with a polyvinylidene fluoride separation membrane to react to obtain a surface-activated polyvinylidene fluoride separation membrane. membrane;

[0053] (2) Add 1.5mL orthosilicate methyl ester to 100mL 2.5mmol / L HCl solution, mix with 100mL phosphate buffer solution with a pH value of about 5.5 after stirring for 15min, and then mix with the separation membrane obtained in step (1) at room temperature React for 6 hours to obtain a polyvinylidene fluoride membrane separation membrane with nano silicon dioxide deposited on the surface;

[0054] (3) Soak the separation membrane obtained in step (2) in 100 mL of dichloromethane, add 1 mL of 3-picoline and 1 mL of 2-bromoisobutyryl bromide, p...

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Abstract

The invention discloses a high-flux antibacterial anti-pollution polymer separation membrane and a preparation method thereof, and belongs to the technical field of membrane separation. The method comprises the following steps: firstly the surface of a polymer separation membrane is activated, nano silicon dioxide particles are deposited in situ on the surface of the surface-activated polymer separation membrane to enhance water permeability of the membrane, then a quaternary ammonium salt is used as a bactericide, and the quaternary ammonium salt is grafted onto the polymer separation membrane on which the nano silicon dioxide particles are deposited by adopting an electron transfer regeneration catalyst atom transfer free radical polymerization method. The method provided by the invention is simple to operate, the surface of the modified polymer separation membrane prepared by adopting the method can effectively inhibit growth and adhesion of bacteria and microorganisms, and the membrane has high water permeability and sustained and stable antibacterial and anti-pollution effects.

Description

technical field [0001] The invention relates to a polymer separation membrane and a preparation method thereof, in particular to a high-throughput antibacterial and anti-pollution polymer separation membrane and a preparation method thereof, belonging to the technical field of membrane separation. Background technique [0002] As membrane separation technology is more and more used in the field of sewage treatment, membrane fouling has become a prominent problem that limits the further development of membrane separation technology. Membrane materials are the core of the membrane separation process, and the development of antibacterial and antifouling separation membranes is the most direct and effective means to control membrane fouling. At the same time, in actual industrial production, the flux of the membrane plays a vital role in the technical and economic performance of the membrane process. The development of polymer separation membranes with high flux and good anti-po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02
CPCB01D67/0079B01D67/0093B01D69/02B01D2325/48
Inventor 王志伟平梦张星冉吴志超
Owner TONGJI UNIV
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