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Silver nanoparticle-loaded hybrid membrane and preparation method and application thereof

A technology of silver nanoparticles and hybrid membranes, which is applied in chemical instruments and methods, membranes, membrane technologies, etc., can solve the problems of silver ion loss and antibacterial activity reduction, and achieve high interception, high flux, and prevention of silver ions The effect of the loss of

Active Publication Date: 2016-04-20
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the silver particle hybrid film prepared by common methods is easy to cause the loss of silver ions, which will reduce the antibacterial activity.

Method used

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  • Silver nanoparticle-loaded hybrid membrane and preparation method and application thereof
  • Silver nanoparticle-loaded hybrid membrane and preparation method and application thereof
  • Silver nanoparticle-loaded hybrid membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Ag-Cu 2 Preparation of O nanowire / polysulfone hybrid membrane

[0033] (1) Add 0.4g of cuprous oxide nanowires into 100mL of Tris-HCl buffer solution with a pH of 9.0, after the dispersion is uniform, adjust the pH to 7.0, add 0.6g of levodopa and stir for 1.5h, solid particles are formed in the system , the solid particles were collected by suction filtration, washed with deionized water and ethanol, and dried overnight at room temperature to obtain composite levodopa cuprous oxide particles.

[0034] (2) AgNO in 10mL5g / L 3 90mL8wt% ammonia water was added into the solution, and the solution was formed from precipitation until it became clear again to obtain a silver ammonia solution.

[0035] (3) Disperse 0.2g of the composite levodopa cuprous oxide particles prepared in step (1) in the 100mL silver ammonia solution prepared in step (2), then filter, wash with deionized water, and dry to obtain loaded silver nanoparticles 0.2g of the composite material, stored at 5...

Embodiment 2

[0043] Ag-Cu 2 O nanosphere / polyethylene hybrid film

[0044] The difference between this example and Example 1 is that the inorganic filler in step (2) is cuprous oxide nano-microspheres, and the flat film material in step (5) is changed to polyethylene. Other conditions are the same, and the final Ag-Cu 2O nanosphere / polyethylene hybrid film.

[0045] Hybrid membrane performance test

[0046] The prepared Ag-Cu 2 O nanosphere / polyethylene hybrid membrane has an antibacterial zone of 15.3mm, excellent antibacterial performance, and a pure water flux of up to 156L / m 2 h, the rejection rate of BSA solution is 92.7%.

Embodiment 3

[0048] Ag-Cu 2 O nanoparticles / polyethylene hybrid film

[0049] The difference between this example and Example 1 is that the inorganic filler in step (2) is cuprous oxide nanoparticles. Other conditions are the same, and the final Ag-Cu 2 O nanoparticles / polysulfone hybrid membrane.

[0050] Hybrid membrane performance test

[0051] The prepared Ag-Cu 2 O nanoparticle / polysulfone hybrid membrane has an antibacterial zone of 12.3mm, excellent antibacterial performance, and a pure water flux of up to 166L / m 2 h, the rejection rate of BSA solution is 91.3%.

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Abstract

The invention provides a silver nanoparticle-loaded hybrid membrane. A preparation method of the hybrid membrane comprises the steps that an inorganic filler is dispersed into a Tris-HCl buffer solution, levodopa is added, stirring is performed, suction filtration is performed to collect solid particles, washing and drying are performed, and then composite levodopa inorganic filler particles are obtained; the composite levodopa inorganic filler particles are dispersed into a tollens reagent, and then filtering, cleaning and drying are performed to obtain a silver nanoparticle-loaded composite material; the silver nanoparticle-loaded composite material and a membrane material are added in organic solvent, the materials are mixed to be uniform, and then standing and ultrasonic defoaming are performed to obtain a membrane casting solution; the membrane casting solution is prepared into a membrane, and after washing is performed, the hybrid membrane is obtained. The hybrid membrane can be used as a plate antibacterial membrane or ultrafiltration membrane; by fixing the silver nanoparticles to the surface of a cuprous oxide base body through the levodopa, loss of silver ions can be well prevented; in addition, by putting the composited cuprous oxide base body into the membrane, not only is the excellent plate antibacterial property achieved, but also the high throughput and the high interception are achieved.

Description

(1) Technical field [0001] The invention belongs to the technical field of membrane separation and purification, and in particular relates to a hybrid membrane loaded with silver nanoparticles, a preparation method and application thereof. (2) Background technology [0002] Organic-inorganic hybrid membrane separation and purification technology is a new technology that has developed rapidly in recent years, but the pollutants such as bacteria intercepted in the process will adhere to the surface of the membrane or even in the pores of the membrane, and the concentration is much higher than that in water and gas, making it easier to breed and reproduce , the bacteria on the surface of the membrane and in the pores will block the membrane pore channels, increase the resistance of membrane filtration, and decrease the filtration flux rapidly, which is one of the important reasons for membrane fouling and clogging. [0003] The bacteriostatic agents used in the study of antibac...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D71/26B01D67/00B01D69/06B01D61/18
CPCB01D61/18B01D67/0079B01D69/06B01D71/26B01D71/68B01D2325/48
Inventor 张国亮徐泽海叶帅菊李万斌孟琴沈冲
Owner ZHEJIANG UNIV OF TECH
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