Antibacterial composite nanofiber membrane as well as preparation method and application thereof

A technology of composite nanofibers and nanofiber membranes, which is applied in the directions of fiber treatment, fiber chemical characteristics, biochemical fiber treatment, etc., can solve the problem that the filtration effect needs to be further improved, and achieves the effects of safety and environmental protection in the preparation process and simple and easy preparation method.

Active Publication Date: 2019-04-26
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But among these filter materials, C 3 N 4 Nanomaterials exist inside the filter material, and the air is first in contact with the surface of the filter material, and its filtering effect still needs to be further improved

Method used

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  • Antibacterial composite nanofiber membrane as well as preparation method and application thereof
  • Antibacterial composite nanofiber membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] 0.1g of g-C was prepared by high-temperature calcination 3 N 4 The nanoparticles were added into 50ml of N,N-dimethylformamide (DMF) solvent, and then placed in an air plasma atmosphere for 120s, so that the nanoparticles were exfoliated into nanosheets with a particle size of 15nm. Then add the polyacrylonitrile polymer to be spun and stir until it is uniformly dispersed; the obtained polymer spinning solution is spun by electrospinning to obtain a 300 micron thick nanofiber film; Placed in a helium uniform glow discharge plasma atmosphere for 180s, then sprayed with g-C 3 N 4 The 0.1wt.% dispersion of nanosheets is sprayed for 20 seconds and dried at room temperature to obtain an antibacterial composite nanofiber membrane product.

[0056] attached figure 1 Shown is the surface topography of the outer layer nanofibers in the antibacterial composite nanofiber membrane obtained in this embodiment. from figure 1It can be seen that the surface of the nanofiber has e...

Embodiment 2

[0059] 0.15g of g-C was prepared by high-temperature calcination 3 N 4 The nanoparticles were added into 60ml of formic acid solvent, and then placed in an argon plasma atmosphere for 90s, so that the nanoparticles were exfoliated into nanosheets with a particle size of 20nm. Then add the polyamide polymer to be spun and stir until it is uniformly dispersed; the resulting polymer spinning solution is spun by electrospinning to obtain a 450 micron thick nanofiber membrane; Treated in argon uniform glow discharge plasma atmosphere for 150s, then sprayed with g-C 3 N 4 0.2wt.% dispersion of nanosheets, sprayed for 30 seconds, and dried at room temperature to obtain an antibacterial composite nanofiber membrane product.

[0060] Utilize the common cigarette smoke filtration test method to test the filtration effect of the nanofiber membrane, and use a pressure gauge to measure the air flow pressure difference of the filter membrane. The results show that the fiber membrane prep...

Embodiment 3

[0062] 0.4g of g-C was prepared by high-temperature calcination 3 N 4 The nanoparticles were added into 100ml of deionized water solvent, and then placed in an oxygen plasma atmosphere for 300s, so that the nanoparticles were peeled off into nanosheets with a particle size of 30nm. Then add the polyvinyl alcohol polymer to be spun, and stir until it is uniformly dispersed; the obtained polymer spinning solution is spun by electrospinning to obtain a 500 micron thick nanofiber film; the obtained nanofiber film is again Placed in a nitrogen uniform glow discharge plasma atmosphere for 200s, then sprayed with g-C 3 N 4 The 0.5wt.% dispersion of nanosheets is sprayed for 15 seconds and dried at room temperature to obtain an antibacterial composite nanofiber film product.

[0063] Utilize the common cigarette smoke filtration test method to test the filtration effect of the nanofiber membrane, and use a pressure gauge to measure the air flow pressure difference of the filter mem...

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Abstract

The invention discloses an antibacterial composite nanofiber membrane as well as a preparation method and an application thereof. The antibacterial composite nanofiber membrane comprises a nanofiber membrane and g-C3N4 nanosheets distributed on the surface and inside of nanofiber membrane. The invention also discloses the preparation method of the antibacterial composite nanofiber membrane and theapplication of the antibacterial composite nanofiber membrane. Compared with the prior art, the nanofiber membrane with antibacterial and filtering functions can be prepared only from a graphite phase carbon nitride particle material with a plasma technology, and the nanofiber membrane with an antibacterial function and a filtering function can be prepared, and has low resistance and high efficiency. Meanwhile, the preparation process of the antibacterial composite nanofiber membrane is safe and environmentally friendly, and the preparation method is simple and feasible.

Description

technical field [0001] The invention relates to a nanofiber material, in particular to an antibacterial composite nanofiber membrane and its preparation method and application. Background technique [0002] In recent years, regional atmospheric environmental problems characterized by inhalable particulate matter (PM10) and fine particulate matter (PM2.5) have become increasingly prominent. These particulate pollutants not only reduce the visibility of the air, but also seriously affect people's health. healthy. At the same time, in some internal environments of human activities, in addition to dust particles, there will be a large number of pathogenic bacteria in the air, which will also cause great harm to people's health. Compared with traditional filter materials, electrospun nanofiber membranes have the best performance among many filter materials due to their sparse porous structure and relatively high specific surface area. However, because it is generally spun from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/74A61L15/18A61L15/24A61L15/26A61L15/32A61L15/42A61L15/46B01D67/00B01D69/02B01D69/08B01D71/26B01D71/42B01D71/48B01D71/56B01D71/64D06M10/00D06M11/73D01F6/38D01F6/90D01F6/34D01F4/02D01F1/10
CPCA61L15/18A61L15/24A61L15/26A61L15/32A61L15/42A61L15/46A61L2300/404A61L2400/12B01D67/0079B01D69/02B01D69/08B01D71/26B01D71/42B01D71/48B01D71/56B01D71/64B01D71/74B01D2325/48D01F1/10D01F4/02D01F6/34D01F6/38D01F6/90D06M10/00D06M11/73D06M16/00C08L23/12C08L77/00C08L29/04C08L89/00
Inventor 高明李佳黄逸凡喻学锋
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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