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Nanofiber membrane capable of filtering out impurities and preparation method and application thereof

A technology of nanofiber membrane and nanofiber layer, which is applied in fiber processing, textiles, papermaking, nonwovens, etc., can solve the problems of unfavorable industrial production, filtration efficiency of only 80-90%, and complicated preparation of spinning solution. Achieve the effect of low price, not easy to break, and good sun resistance

Inactive Publication Date: 2016-07-27
スンナテクノロジーズシャンハイカンパニーリミテッド
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the preparation of its own spinning solution is relatively complicated, and the output speed is only 10-20μL / min / hole, it is not conducive to industrial production, and its filtration efficiency is only 80-90%.

Method used

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  • Nanofiber membrane capable of filtering out impurities and preparation method and application thereof
  • Nanofiber membrane capable of filtering out impurities and preparation method and application thereof
  • Nanofiber membrane capable of filtering out impurities and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take by weighing the polyacrylonitrile that quality is 5g and dissolve in 20ml dimethylformamide solution (obtaining the spinning solution that mass fraction is 25%), after it dissolves completely, inject in the liquid storage tank (injection rate is 0.5ml / min), add a positive pressure of 50kv to the spinning end of the needle electrospinning equipment, and a negative pressure of 40kv to the receiving end for electrospinning, adjust the positive and negative voltage difference to 90kv, and adjust the spinning needle and the receiving substrate The distance between them is 20cm, the ambient temperature and humidity are adjusted to 15°C and 30% respectively, and the non-woven fabric is used as the receiving substrate, that is, the grammage is 3.82g / cm2 A nanofibrous membrane that can filter out impurities. Such as figure 1 Shown is the surface scanning electron microscope (SEM) figure of the polyacrylonitrile nanofiber membrane that the present embodiment prepares gained...

Embodiment 2

[0029] The polyvinylidene fluoride that weighs 15g is dissolved in 150ml dimethylformamide and acetone mixed solution (obtaining the spinning solution that mass fraction is 10%), after it dissolves completely, inject in the liquid storage tank (injection solution) The rate is 1.5ml / min), and a positive pressure of 45kv is applied to the spinning end of the linear electrospinning equipment, and a negative pressure of 35kv is applied to the receiving end for electrospinning, and the positive and negative voltage difference is adjusted to 80kv, and the spinning The distance between the steel wire and the receiving substrate is 40cm, the temperature and humidity of the environment are adjusted to 30°C and 70% respectively, and the non-woven fabric is used as the receiving substrate to obtain an average diameter of 358nm and a gram weight of 2.18g / cm 2 A nanofibrous membrane that can filter out impurities.

Embodiment 3

[0031] The polycaprolactone that takes by weighing 20g is dissolved in 50ml trifluoroethanol solution (obtaining the spinning solution that mass fraction is 15%), after it dissolves completely, inject in the liquid storage tank (screw rotation speed is 100rpp), Add a positive pressure of 10kv to the spinning end of the spiral blade electrospinning equipment, and add a negative pressure of 40kv to the receiving end for electrospinning, adjust the positive and negative voltage difference to 50kv, and adjust the distance between the spinneret and the receiving substrate The spacing is 30cm, the ambient temperature and humidity are adjusted to 20°C and 50% respectively, and the non-woven fabric is used as the receiving substrate to obtain an average diameter of 520nm and a gram weight of 2.88g / cm 2 A nanofibrous membrane that can filter out impurities.

[0032] Table 1 is the air filtration efficiency and air resistance data of the nanofiber membranes prepared under the conditions...

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Abstract

The invention discloses a nanofiber membrane capable of filtering out impurities. The nanofiber membrane comprises a substrate and a nanofiber layer located on the receiving substrate; the diameter of the nanofiber layer ranges from 100 nm to 1000 nm, and the gram weight is 1-15 g / m<2>; the nanofiber layer is made of a high-molecular polymer material. In addition, the invention further discloses a preparation method of the nanofiber membrane, wherein a needle electrostatic spinning or linear electrostatic spinning or helical blade electrostatic spinning technology is adopted, electrostatic spinning process parameters and environmental conditions are adjusted, and the nanofiber membrane which filters out impurities in air and water efficiently can be prepared efficiently. Furthermore, the invention discloses application of the nanofiber membrane to air filtering products and water filtering products. The nanofiber membrane has the filtering efficiency of as high as 90% or above when used for filtering particles in air, air resistance is only 30-60 Pa, and the nanofiber membrane has the advantages of being high in flux and high in retention rate for pollution sources such as waste water.

Description

technical field [0001] The invention relates to a nanofiber membrane, in particular to a nanofiber membrane capable of filtering impurities, which is used for filtering particulate matter in air and water. In addition, the present invention also relates to the preparation method and application of the nanofiber membrane. Background technique [0002] Air or water contains various particles, suspended solids and other impurities, such as dust in the air, PM2.5, PM10, dissolved substances in water, etc., all need to be filtered with a filter membrane. PM2.5 refers to the particulate matter in the ambient air with an aerodynamic equivalent diameter less than or equal to 2.5 microns. Compared with larger particulate matter, PM2.5 has a small particle size, large area, strong activity, and is easy to attach toxic and harmful substances (such as , heavy metals, microorganisms, etc.), and the residence time in the atmosphere is long and the transportation distance is long, so it h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D04H1/43D01D5/00
CPCD04H1/728D01D5/003D04H1/43
Inventor 潘信方俊
Owner スンナテクノロジーズシャンハイカンパニーリミテッド
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