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Nano cobweb antibacterial composite air filtering material and preparation method thereof

An air filter material and cobweb technology, which is applied in the field of nano cobweb antibacterial composite air filter material and preparation thereof, can solve the problems of high cost of Sophora flavescens extract, unsuitable for industrial production and the like, and achieve the effects of good antibacterial performance and high filtration efficiency.

Inactive Publication Date: 2020-08-11
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the Sophora flavescens extract used in this patent has a high cost and is not suitable for industrial production

Method used

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  • Nano cobweb antibacterial composite air filtering material and preparation method thereof
  • Nano cobweb antibacterial composite air filtering material and preparation method thereof
  • Nano cobweb antibacterial composite air filtering material and preparation method thereof

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preparation example Construction

[0029] The invention provides a preparation method of a nano-spider web antibacterial composite air filter material, comprising the following steps:

[0030] S1. adding the polyurethane particles into the solvent, stirring magnetically to obtain a polyurethane solution with a concentration of 5-10 wt %;

[0031] S2. Add a surfactant to the polyurethane solution, stir it magnetically, then add silver nitrate, and continue the magnetic stirring for 2-6 hours to obtain an electrospinning solution; the mass percentage of silver nitrate in the electrospinning solution is 0.1-0.9 %;

[0032] S3. Inject the electrospinning solution into the electrostatic spinning device, and spray the electrospinning solution to cover the surface of the polypropylene melt-blown nonwoven fabric through the electrostatic spinning device to obtain a nano spider web fiber film on one side Composite air filter material;

[0033] S4. The nano-spider web fiber membrane in the composite air filter material...

Embodiment 1

[0040] Add 1.43g of polyurethane polymer particles to 18.95g of DMF solvent, stir magnetically at 50°C for 24h to obtain a polyurethane solution with a concentration of 7wt%, add 0.030g of surfactant SLS to the polyurethane solution, and then add 0.101g of silver nitrate The particles were stirred for 4 hours to obtain an electrospinning solution. Paste the polypropylene melt-blown nonwoven material with a fiber diameter of 0.5-15 μm and a pore size of 0.2-20 μm on the receiving plate of the electrostatic spinning device, set the spinning voltage to 25kV, the receiving distance to 15cm, and the spinning speed to 1mL / h, temperature is 35 ℃, and relative humidity is 25%, carry out electrostatic spinning, obtain one side to be the composite air filter material of nano spider web fiber film, take off composite air filter material, and adopt ultraviolet light to have in the composite air filter material One side of the nano-spider web fiber membrane was irradiated for 30 minutes t...

Embodiment 2

[0043] Add 1.33g of polyurethane polymer particles to 17.67g of DMF solvent, stir magnetically at 50°C for 24h to obtain a polyurethane solution with a concentration of 7wt%, add 0.029g of surfactant SLS to the polyurethane solution, and then add 0.098g of silver nitrate The particles were stirred for 4 hours to obtain an electrospinning solution. Paste the polypropylene melt-blown nonwoven material with a fiber diameter of 0.5-15 μm and a pore size of 0.2-20 μm on the receiving plate of the electrostatic spinning device, set the spinning voltage to 30kV, the receiving distance to 15cm, and the spinning speed to 1mL / h, temperature is 35 ℃, relative humidity is 26%, carry out electrostatic spinning, obtain one side to be the composite air filter material of nano spider web fiber film, take off composite air filter material, and adopt ultraviolet light to have in the composite air filter material One side of the nano-spider web fiber membrane was irradiated for 30 minutes to ob...

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Abstract

The invention belongs to the field of air filtering materials and preparation thereof, and discloses a nano cobweb antibacterial composite air filtering material and a preparation method thereof. Thepreparation method comprises the following steps: firstly, adding polyurethane particles into a solvent to obtain a polyurethane solution, and then adding a surfactant and silver nitrate particles toprepare an electrostatic spinning solution; spraying and covering the electrostatic spinning solution on the surface of the polypropylene melt-blown non-woven fabric by using an electrostatic spinningdevice to obtain a composite air filtering material with a nano cobweb fiber membrane on one surface; and finally, carrying out ultraviolet irradiation to generate nano-silver in situ in the nano cobweb fiber membrane. The air filtering material is of a fluffy three-dimensional net-shaped intercommunication structure without adhesion between fibers and comprises a base material layer and a nano cobweb fiber membrane layer containing nano-silver, the base material layer is polypropylene melt-blown non-woven fabric, and the nano cobweb fiber membrane layer is formed by compounding two-dimensional superfine cobweb fibers and one-dimensional nanofibers; the filter material has excellent filtering performance of high filtering efficiency and resistance pressure reduction, and also has good antibacterial performance.

Description

technical field [0001] The invention belongs to the field of air filter materials and preparation thereof, in particular to a nano spider web antibacterial composite air filter material and a preparation method thereof. Background technique [0002] At present, the air filter materials widely used in my country's industry are based on glass fiber or melt-blown non-woven fabrics, which have a good filtering effect on particles above the micron level, but the filtration of sub-micron or even nano-scale particles The efficiency is poor, and there are problems such as large filtration resistance, small dust holding capacity, and short service life. Therefore, it is urgent to develop a new type of high-efficiency and low-resistance air filter material. [0003] Nanofibers prepared by electrospinning technology have the characteristics of large specific surface area, high porosity, and good internal pore connectivity. They can filter particles of 1-2 μm, and even high-efficiency ai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/16B01D46/00B01D46/10
CPCB01D39/1623B01D46/0001B01D46/0028B01D46/10
Inventor 臧传锋陈昊李素英张广宇蒋丽云
Owner NANTONG UNIVERSITY