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Hydrophilic antibacterial ultrafiltration membrane and preparation method for same

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

Inactive Publication Date: 2015-09-23
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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  • Hydrophilic antibacterial ultrafiltration membrane and preparation method for same
  • Hydrophilic antibacterial ultrafiltration membrane and preparation method for same
  • Hydrophilic antibacterial ultrafiltration membrane and preparation method for same

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 the surface of the polydopamine coating layer with amino-decorated polyethylene glycol (Poly(ethylene glycol) methyl ether amine, mPEG-NH 2 ) solution to form a mPEG-NH on the surface of the polydopamine coating layer 2 Floor;

[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 ultraf...

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 preparation method for a hydrophilic antibacterial ultrafiltration membrane. The method comprises the following steps of providing a basic filter membrane; dissolving dopamine into a trihydroxymethyl aminomethane buffer solution to prepare a dopamine solution; coating the surface of the basic filter membrane with the dopamine solution to form a polydopamine coating on the surface of the basic filter membrane; coating the surface of the polydopamine coating with an amino-modified polyethylene glycol solution to form an amino-modified polyethylene glycol layer on the surface of the polydopamine coating; arranging antibacterial nanoparticles on the surface of the amino-modified 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 Applications(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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