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A kind of hydrophilic antibacterial ultrafiltration membrane and preparation method thereof

An ultrafiltration membrane and hydrophilic technology, which is applied in the field of hydrophilic antibacterial ultrafiltration membrane and its preparation, can solve the problems of increasing the application cost of the filtration membrane, and the reproducibility of nanoparticles has not been effectively solved, and achieve lasting hydrophilicity Sexuality and antibacterial properties, saving resources, improving the effect of hydrophilicity and antibacterial properties

Inactive Publication Date: 2017-07-18
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nanoparticles on the surface of the filter membrane will be consumed after a period of use, and the reproducibility of the nanoparticles on the surface of the filter membrane has not been effectively resolved, so that the filter membrane needs to be replaced after a period of use, greatly increasing The application cost of the filter membrane

Method used

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  • A kind of hydrophilic antibacterial ultrafiltration membrane and preparation method thereof
  • A kind of hydrophilic antibacterial ultrafiltration membrane and preparation method thereof
  • A kind of hydrophilic antibacterial ultrafiltration membrane and preparation method thereof

Examples

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preparation example Construction

[0021] The preparation method of hydrophilic antibacterial ultrafiltration membrane provided by the invention comprises the following steps:

[0022] S10, providing a basic filter membrane;

[0023] S20, dissolving dopamine in tris (Tris) buffer solution to prepare a dopamine solution;

[0024] S30, coating the dopamine solution on the surface of the basic filter membrane to form a polydopamine coating layer on the surface of the basic filter membrane;

[0025] S40, coating poly(ethylene glycol)methyl ether amine, mPEG-NH on the surface of the polydopamine coating layer 2 ) solution to form a mPEG-NH on the surface of the polydopamine coating layer 2 layer;

[0026] S50, in the mPEG-NH 2 Antibacterial nanoparticles are arranged on the surface of the layer to obtain the hydrophilic antibacterial ultrafiltration membrane.

[0027] In the step S10, the basic filter membrane is an ultrafiltration membrane, and the material of the ultrafiltration membrane is any one of polysul...

Embodiment

[0045] In the specific embodiment of the present invention, the specific preparation process of the ultrafiltration membrane with hydrophilicity and antibacterial properties is as follows: a polysulfone ultrafiltration membrane is provided, and 2 g of dopamine is dissolved to a concentration of 0.01 mol L in 1 L -1 , pH = 8.5 Tris buffer solution, prepared to 2 g L -1 dopamine solution. Then the polysulfone ultrafiltration membrane was soaked in the dopamine solution for 3 hours, then taken out, and washed with ultrapure water to obtain the first filtration membrane. Soak the obtained first filter membrane in 1 g·L -1 mPEG-NH 2 solution, took it out after 1 hour, and washed it with ultrapure water to obtain the second filter membrane. Soak the second filter membrane in 500 mg·L -1 In the silver nitrate solution, take it out after 1 hour, and wash it with ultrapure water to obtain a hydrophilic antibacterial ultrafiltration membrane. Soak the hydrophilic antibacterial ultr...

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Abstract

The invention relates to a method for preparing a hydrophilic antibacterial ultrafiltration membrane. The method comprises the following steps: providing a basic filter membrane; dissolving dopamine in tris buffer solution to prepare a dopamine solution; dissolving the dopamine The solution is coated on the surface of the basic filter membrane to form a polydopamine coating layer on the surface of the basic filter membrane; An amino-decorated polyethylene glycol layer is formed on the surface of the coating layer; antibacterial nanoparticles are arranged on the surface of the amino-decorated polyethylene glycol layer to obtain the hydrophilic antibacterial ultrafiltration membrane.

Description

technical field [0001] The invention relates to a hydrophilic antibacterial ultrafiltration membrane and a preparation method thereof. Background technique [0002] Membrane separation technology is an emerging separation technology. Compared with traditional separation technologies, membrane separation has advantages in drinking water purification, recovery of biologically active substances, and refinement due to its advantages such as mild operating conditions and small footprint. widely used. However, membrane fouling has become the main bottleneck restricting the application of membrane separation technology. The decrease in flux caused by membrane fouling is the main factor leading to the decrease of membrane life and the increase of operating costs. Improving the hydrophilicity of the membrane surface can effectively reduce membrane fouling, and many researchers have improved the hydrophilicity of the membrane surface through membrane modification. [0003] In the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/02B01D69/12B01D71/60B01D67/00A01N59/16A01P1/00
Inventor 王小毛龚坤丁文明杨宏伟解跃峰
Owner TSINGHUA UNIV
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