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Preparing method for antibacterial nanofiltration membrane with ultrafiltration membrane as base membrane

A technology of ultrafiltration membrane and nanofiltration membrane, which is applied in the field of nanofiltration membrane, can solve the problems of insufficient antibacterial performance of nanofiltration membrane, low efficiency of nanofiltration membrane production, and need for more organic solvents, etc., so as to improve the service life and stability of use, short assembly time, and reduced energy consumption

Inactive Publication Date: 2017-02-22
FOSHAN XUNTUOAO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method of antibacterial nanofiltration membrane, which overcomes the lack of separation performance or antibacterial performance of nanofiltration membranes in the prior art, and simultaneously overcomes the low efficiency of nanofiltration membranes, the preparation process requires more organic solvents, and the assembly process. Long time, time-consuming and labor-intensive

Method used

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  • Preparing method for antibacterial nanofiltration membrane with ultrafiltration membrane as base membrane
  • Preparing method for antibacterial nanofiltration membrane with ultrafiltration membrane as base membrane
  • Preparing method for antibacterial nanofiltration membrane with ultrafiltration membrane as base membrane

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Embodiment 1

[0031] A preparation method of an antibacterial nanofiltration membrane using an ultrafiltration membrane as a base membrane, comprising the following steps:

[0032] The first step: soak the charged ultrafiltration membrane in polyallyl ammonium chloride solution (mass concentration is 0.1%) under vacuum state, add dropwise sodium hydroxide to adjust the pH value of the solution to 10.0, and the ultrafiltration The membrane is fixed in a container with a porous support layer, the membrane is facing up, and then the polyallyl ammonium chloride solution is injected into the container under pressure, and the ultrafiltration membrane is combined with the polyallyl ammonium chloride, and the assembly time is Obtain polycation composite membrane in 20 minutes;

[0033] The second step: use deionized water to clean the polycation composite membrane (cleaning time is 20 seconds), then soak the polycation polymer membrane in polyethylene sulfate solution (mass concentration is 0.2%), ...

Embodiment 2

[0036] A preparation method of an antibacterial nanofiltration membrane using an ultrafiltration membrane as a base membrane, comprising the following steps:

[0037] The first step: soak the charged ultrafiltration membrane in polyallyl ammonium chloride solution (mass concentration is 0.3%) under vacuum state, add dropwise sodium hydroxide to adjust the pH value of the solution to 10.2, and the ultrafiltration The membrane is fixed in a container with a porous support layer, the membrane is facing up, and then the polyallyl ammonium chloride solution is injected into the container under pressure, and the ultrafiltration membrane is combined with the polyallyl ammonium chloride, and the assembly time is Obtain polycation composite membrane in 25 minutes;

[0038] The second step: use deionized water to clean the polycation composite membrane (cleaning time is 30 seconds), then soak the polycation polymer membrane in polyethylene sulfate solution (mass concentration is 0.5%), ...

Embodiment 3

[0041] A preparation method of an antibacterial nanofiltration membrane using an ultrafiltration membrane as a base membrane, comprising the following steps:

[0042] The first step: soak the charged ultrafiltration membrane in polyallyl ammonium chloride solution (mass concentration is 0.1%) under vacuum state, add dropwise sodium hydroxide to adjust the pH value of the solution to 10.2, and the ultrafiltration The membrane is fixed in a container with a porous support layer, the membrane is facing up, and then the polyallyl ammonium chloride solution is injected into the container under pressure, and the ultrafiltration membrane is combined with the polyallyl ammonium chloride, and the assembly time is Obtain polycation composite membrane in 20 minutes;

[0043] The second step: use deionized water to clean the polycation composite membrane (cleaning time is 30 seconds), then soak the polycation polymer membrane in polyethylene sulfate solution (mass concentration is 0.2%), ...

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Abstract

The invention discloses a preparing method for an antibacterial nanofiltration membrane with an ultrafiltration membrane as a base membrane. The preparing method includes the following steps that 1, the ultrafiltration membrane with charge performance is soaked in a poly (allylamine hydrochloride) solution in vacuum, and sodium hydroxide is added dropwise to adjust the pH value of the solution to obtain a polycation composite membrane; 2, the polycation composite membrane is washed with deionized water and then soaked in a polyethylene sulfate solution, and meanwhile an ammonium nitrate solution is added to obtain the supramolecular polymer composite membrane; 3, the supramolecular polymer composite membrane is washed with deionized water and then soaked in an epsilon-polylysine solution. The preparing method of the novel nanofiltration membrane high in separating property and bacterium resistance is high in membrane preparing efficiency, short in membrane preparing time, environmentally friendly and efficiency as the water is used as solvent in the preparation process without organic solvent.

Description

technical field [0001] The invention relates to the technical field of nanofiltration membranes, in particular to a preparation method of an antibacterial nanofiltration membrane using an ultrafiltration membrane as a base membrane. Background technique [0002] Nanofiltration membrane is a functional semi-permeable membrane that allows solvent molecules or some low-molecular-weight solutes or low-priced ions to pass through. It is a special and promising type of separation membrane. It is named after its size is about nanometers. The molecular weight of its intercepted organic matter is about 150-500, and its ability to intercept soluble salts is between 2-98%. The desalination of monovalent anion salt solutions is lower than that of high-valent anion salt solutions. It is used to remove organic matter and color of surface water, remove hardness of ground water, partially remove soluble salt, concentrate fruit juice and separate useful substances in medicine, etc. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/02B01D69/12B01D67/00
CPCB01D69/02B01D67/0002B01D69/12B01D2325/48
Inventor 付淑珍
Owner FOSHAN XUNTUOAO TECH CO LTD
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