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Preparation method of antibacterial nanofiber membrane

A nanofiber film and solution technology, applied in the fields of fiber chemical characteristics, rayon manufacturing, non-woven fabrics, etc., can solve the problems of poor decontamination resistance of antibacterial textiles, uneven distribution of nano-silver in the nanofiber film, etc., and achieve excellent Long-acting antibacterial performance, uniform distribution, excellent decontamination resistance

Inactive Publication Date: 2022-03-11
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are many ways to load nano-silver on textiles, such as spraying method, dipping method, padding method, negative pressure adsorption method, etc. The antibacterial textiles prepared by these methods have poor decontamination resistance and can only be used for one-time use.
Although there are also methods of doping nano-silver in the spinning solution and using electrospinning technology to prepare silver-loaded nanofiber membranes to achieve decontamination resistance and long-term antibacterial properties, but all of them use reducing agents to reduce them in the solution stage to prepare nano-silver. , so that the nano-silver distribution in the final nanofibrous membrane is not uniform enough

Method used

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  • Preparation method of antibacterial nanofiber membrane

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Embodiment 1

[0037] The present embodiment provides a kind of preparation method of antibacterial nanofiber membrane, described method comprises the following steps:

[0038] (1) Prepare a silver nitrate solution with a concentration of 7g / L, add an appropriate amount of ammonia water, and stir magnetically for 1 hour to obtain a silver ammonia solution.

[0039] (2) Add the silver ammonia solution obtained in step (1) into the aqueous polyurethane emulsion with a solid content of 30%, and stir magnetically for 2 hours to obtain an aqueous polyurethane emulsion containing silver diammine hydroxide.

[0040] (3) Prepare a TPU solution with a solute mass fraction of 25%, the solvent used is DMF and acetone (volume ratio 1:1), heat and dissolve in a water bath at 60°C, and stir magnetically for 5 hours to obtain a TPU solution.

[0041] (4) Add the water-based polyurethane emulsion containing diammine silver hydroxide obtained in step (2) dropwise to the TPU solution obtained in step (3), and...

Embodiment 2

[0045] The present embodiment provides a kind of preparation method of antibacterial nanofiber membrane, described method comprises the following steps:

[0046] (1) Prepare a silver nitrate solution with a concentration of 8 g / L, add an appropriate amount of ammonia water, and stir magnetically for 1.5 hours to obtain a silver ammonia solution.

[0047] (2) Add the silver-ammonia solution obtained in step (1) into the aqueous polyurethane emulsion with a solid content of 32%, and magnetically stir for 2.5 hours to obtain an aqueous polyurethane emulsion containing silver diammine hydroxide.

[0048] (3) Prepare a TPU solution with a solute mass fraction of 27%. The solvent used is DMF and acetone (volume ratio 1:1), heated and dissolved in a water bath at 70°C, and magnetically stirred for 4 hours to obtain a TPU solution.

[0049] (4) Add the water-based polyurethane emulsion containing diammine silver hydroxide obtained in step (2) dropwise to the TPU solution obtained in s...

Embodiment 3

[0053] The present embodiment provides a kind of preparation method of antibacterial nanofiber membrane, described method comprises the following steps:

[0054] (1) Prepare a silver nitrate solution with a concentration of 9g / L, add an appropriate amount of ammonia water, and stir magnetically for 2 hours to obtain a silver ammonia solution.

[0055] (2) Add the silver ammonia solution obtained in step (1) into the aqueous polyurethane emulsion with a solid content of 35%, and stir magnetically for 3 hours to obtain an aqueous polyurethane emulsion containing silver diammine hydroxide.

[0056] (3) Prepare a TPU solution with a solute mass fraction of 30%. The solvent used is DMF and acetone (volume ratio 1:1), heated and dissolved in a water bath at 80°C, and magnetically stirred for 3 hours to obtain a TPU solution.

[0057] (4) Add the water-based polyurethane emulsion containing diammine silver hydroxide obtained in step (2) dropwise to the TPU solution obtained in step (3)...

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Abstract

The invention provides a preparation method of an antibacterial nanofiber membrane, which comprises the following steps: firstly, preparing a silver ammonia solution and a TPU (Thermoplastic Polyurethane) solution, then mixing the silver ammonia solution into a waterborne polyurethane system, and then dropwise adding into the TPU solution; the preparation method comprises the following steps: preparing a nanofiber membrane through an electrostatic spinning technology, and finally putting the nanofiber membrane in an electron accelerator for irradiation reduction to obtain the antibacterial nanofiber membrane. Silver particles in the antibacterial nanofiber membrane are evenly distributed, the antibacterial performance is excellent, and long-acting antibacterial and decontamination-resistant performance can be achieved.

Description

technical field [0001] The invention relates to the field of preparation of antibacterial materials, in particular to a method for preparing a silver-loaded antibacterial nanofiber film. Background technique [0002] As a new type of antibacterial agent, nano-inorganic antibacterial agent has the advantages of broad antibacterial spectrum, long effective antibacterial period, low toxicity, no drug resistance, and high safety. Nano-silver, as a kind of nano-inorganic antibacterial agent, has been widely used in environmental purification, medical treatment, cosmetics, textiles and other fields. In the textile industry, nano-silver can endow fabrics with functions such as antibacterial, antistatic, and anti-electromagnetic radiation. Its antibacterial mechanism is that nano-silver combines with the cell wall or cell membrane of the bacteria and directly enters the bacteria, rapidly combines with the sulfhydryl group of oxygen metabolism, blocks the metabolism and makes it ina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D04H1/4358D01F6/94D01F1/10
CPCD04H1/728D04H1/4358D01F6/94D01F1/103
Inventor 姚理荣夏勇赵迎徐思峻潘刚伟徐利云
Owner NANTONG UNIVERSITY
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