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Hollow fiber nanofiltration membrane based on epsilon-polylysine and preparation method of hollow fiber nanofiltration membrane

A technology of polylysine and nanofiltration membrane, which is applied in the field of filter materials, can solve the problems of long cross-linking process, low preparation efficiency, hidden safety hazards, etc., and achieve the effect of simple preparation method, long stability and good separation performance

Inactive Publication Date: 2016-12-14
DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the antibacterial agents currently used are inorganic antibacterial agents and polymer antibacterial agents. During use, crosslinking agents or initiators need to be used. Pollution of water bodies and potential safety hazards

Method used

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  • Hollow fiber nanofiltration membrane based on epsilon-polylysine and preparation method of hollow fiber nanofiltration membrane
  • Hollow fiber nanofiltration membrane based on epsilon-polylysine and preparation method of hollow fiber nanofiltration membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) configure the polyallyl ammonium chloride solution and the ε-polylysine solution of 0.2% respectively with a mass percentage concentration of 0.2%, add a certain amount of sodium chloride respectively, so that the concentration of sodium chloride is 0.5M , adjust the pH value of the polyallyl ammonium chloride solution to 2.5, and the pH value of the ε-polylysine solution to 7.5.

[0033] (2) Prepare a sodium polystyrene sulfonate solution with a mass percent concentration of 0.4%, add a certain amount of calcium chloride to make the concentration of calcium chloride 0.5M, and adjust the pH value of the solution to 2.5.

[0034] (3) the sulfonated polysulfone hollow fiber membrane with a molecular weight cut-off of 50,000 is a support membrane, fixed in a container with a porous support layer, the membrane face is facing up, then in the container, add cationic polyelectrolyte solution, add The pressure is 0.1MPa, the cationic polyelectrolyte is combined with the sup...

Embodiment 2

[0041] (1) It is 0.2% poly-N, N-dimethyl diallyl ammonium chloride solution and 0.6% epsilon-polylysine solution to configure mass percentage concentration respectively, add a certain amount of sodium chloride respectively, make The concentration of sodium chloride is 0.5M, adjust the pH value of polyallyl ammonium chloride, poly N,N-dimethyldiallyl ammonium chloride solution to 2.5, and the pH value of ε-polylysine solution is 10.5.

[0042] (2) Prepare a polyethylene sulfate solution with a mass percentage concentration of 0.4%, add a certain amount of calcium chloride to make the concentration of calcium chloride 0.5M, and adjust the pH value of the solution to 2.5.

[0043] (3) The sulfonated polyethersulfone hollow fiber ultrafiltration membrane with a molecular weight cut-off of 30,000 is used as a support membrane, fixed in a container with a porous support layer, and the membrane is facing up, and then the cationic polyelectrolyte is added to the container Solution, p...

Embodiment 3

[0050] (1) Configure the polyallyl ammonium chloride solution and the ε-polylysine solution of 0.4% respectively with a mass percent concentration of 0.2%, add a certain amount of sodium chloride respectively, so that the concentration of sodium chloride is 0.5M , adjust the pH value of the polyallyl ammonium chloride solution to 2.5, and the pH value of the ε-polylysine solution to 8.5.

[0051] (2) Prepare a polyacrylic acid solution with a mass percent concentration of 0.4%, add a certain amount of calcium chloride to make the calcium chloride concentration 0.5M, and adjust the pH value of the solution to 2.5.

[0052] (3) the sulfonated polysulfone hollow fiber membrane with a molecular weight cut-off of 40,000 is a support membrane, fixed in a container with a porous support layer, with the membrane facing up, then adding cationic polyelectrolyte solution to the container, adding The pressure is 0.2 MPa, the cationic polyelectrolyte is combined with the supporting membran...

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Abstract

The invention provides a hollow fiber nanofiltration membrane based on epsilon-polylysine and a preparation method of the hollow fiber nanofiltration membrane. The hollow fiber nanofiltration membrane based on epsilon-polylysine adopts a hollow fiber membrane as a supporting membrane, and is formed by self-assembling cationic polyelectrolytes and anionic polyelectrolytes containing the epsilon-polylysine layer by layer. The preparation method comprises the following steps: fixing the supporting membrane in a container with a porous supporting layer, allowing the surface of the membrane to face upwards, first pressing, combining and assembling the cationic polyelectrolytes and the supporting membrane to obtain a cationic modification membrane, washing, then pressing, combining and assembling the anionic polyelectrolytes and the cationic polyelectrolytes to obtain an anionic modification membrane, washing, performing heat treatment to obtain a first dual-layer, repeating the foregoing steps to obtain a multilayer modification membrane, finally pressing, combining and assembling the epsilon-polylysine and polyanion electrolyte, and washing to obtain a product. An outermost layer of the hollow fiber nanofiltration membrane is the epsilon-polylysine, so that the antibacterial performance is good, the preparation is simple, the efficiency is high, and the hollow fiber nanofiltration membrane is suitable for actual production.

Description

technical field [0001] The invention belongs to the technical field of filter materials, and in particular relates to a hollow fiber nanofiltration membrane based on ε-polylysine and a preparation method thereof. Background technique [0002] The nanofiltration membrane is a membrane material between the ultrafiltration membrane and the reverse osmosis membrane. It can pass through the inorganic salts intercepted by the reverse osmosis, and at the same time retain the low molecular weight organic matter that passes through the ultrafiltration membrane. Nanofiltration membrane materials mainly include organic nanofiltration membranes and inorganic nanofiltration membranes. Organic nanofiltration membranes mainly include cellulose, polyamide and polysulfone. Inorganic nanofiltration membrane soybeans are inorganic ceramic materials. The separation process of nanofiltration membrane is mainly based on sieving effect and charge effect. The separation performance of ions is contr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/56B01D63/02B01D61/00B01D67/00
CPCB01D71/56B01D61/027B01D63/021B01D67/0079B01D2325/48
Inventor 李风浪李舒歆
Owner DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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