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Composite nanofiber filter membrane

A nanofiber and composite filtration technology, applied in the field of air purification and filtration, can solve the problems of low filtration efficiency, large air resistance, and short service life of filter membranes, and achieve the effects of long service life, increased air circulation path, and wide application value.

Inactive Publication Date: 2018-10-09
FOSHAN RIRISHENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the nanofibers spun by electrospinning have a solid circular cross-section, bead shape, flat or ribbon shape, etc. Although the existing nanofibers have different fiber structures, their filtration membranes still have low filtration efficiency and air resistance. Larger and short-lived problems

Method used

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  • Composite nanofiber filter membrane

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Experimental program
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Effect test

Embodiment 1

[0021] figure 1 A schematic structural diagram of a nanofiber composite filter membrane according to an embodiment of the present invention is shown. Such as figure 1 As shown, the nanofiber composite filter membrane, which is prepared by electrospinning, comprises in turn: a membrane support layer 1, a non-woven fabric layer 2, a coarse filter layer 3, a nanofiber layer 4, Polyvinylidene fluoride coating 5, each layer is connected to each other; wherein, the diameter of the filter hole of the coarse filter layer 3 is 0.1mm; the nanofiber layer 4 includes the first nanofiber layer 4, the second nanofiber layer in turn. A fiber layer 4 and a third nanofiber layer 4, the first nanofiber layer 4 is formed on the surface of the coarse filter layer 3; the diameter of the pores between the nanofibers in the first nanofiber layer 4 is 50 μm , the diameter of the pores between the nanofibers in the second nanofiber layer 4 is 20 μm, and the diameter of the pores between the nanofibe...

Embodiment 2

[0024] figure 1 A schematic structural diagram of a nanofiber composite filter membrane according to an embodiment of the present invention is shown. Such as figure 1 As shown, the nanofiber composite filter membrane, which is prepared by electrospinning, comprises in turn: a membrane support layer 1, a non-woven fabric layer 2, a coarse filter layer 3, a nanofiber layer 4, Polyvinylidene fluoride coating 5, each layer is connected to each other; wherein, the diameter of the filter hole of the coarse filter layer 3 is 1mm; the nanofiber layer 4 includes the first nanofiber layer 4, the second nanofiber layer in turn layer 4 and a third nanofiber layer 4, the first nanofiber layer 4 is formed on the surface of the coarse filter layer 3; the diameter of the pores between the nanofibers in the first nanofiber layer 4 is 20 μm, The diameter of the pores between the nanofibers in the second nanofiber layer 4 is 1 μm, and the diameter of the pores between the nanofibers in the thi...

Embodiment 3

[0027] figure 1 A schematic structural diagram of a nanofiber composite filter membrane according to an embodiment of the present invention is shown. Such as figure 1 As shown, the nanofiber composite filter membrane, which is prepared by electrospinning, comprises in turn: a membrane support layer 1, a non-woven fabric layer 2, a coarse filter layer 3, a nanofiber layer 4, Polyvinylidene fluoride coating 5, each layer is connected to each other; wherein, the diameter of the filter hole of the coarse filter layer 3 is 0.5mm; the nanofiber layer 4 includes the first nanofiber layer 4, the second nanofiber layer A fiber layer 4 and a third nanofiber layer 4, the first nanofiber layer 4 is formed on the surface of the coarse filter layer 3; the diameter of the holes between the nanofibers in the first nanofiber layer 4 is 30 μm , the diameter of the pores between the nanofibers in the second nanofiber layer 4 is 10 μm, and the diameter of the pores between the nanofibers in the...

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Abstract

The invention provides a composite nanofiber filter membrane. The composite nanofiber filter membrane is prepared by electrospinning, and sequentially comprises a membrane supporting layer, a nonwovenlayer, a coarse filter layer, a nanofiber layer and a polyvinylidene fluoride coating layer which are mutually connected, wherein the filter hole diameter of the coarse filter layer is 0.1-1mm; the nanofiber layer sequentially comprises a first nanofiber layer, a second nanofiber layer and a third nanofiber layer; the first nanofiber layer is formed on the surface of the coarse filter layer; thediameter of holes between nanofibers in the first nanofiber layer is 20-50 microns, the diameter of holes between nanofibers in the second nanofiber layer is 1-20 microns, and the diameter of holes between nanofibers in the third nanofiber layer is 0.01-1 micron. The nanofiber filter membrane structure is large in specific surface area, an air circulating path is increased, the storage space of particulate matters is increased, and the service life is prolonged while the filtration efficiency of the filter membrane is improved, and the air resistance is lowered.

Description

technical field [0001] The invention relates to the technical field of air purification and filtration, in particular to a nanofiber composite filter membrane. Background technique [0002] Conventional non-woven filter materials have been widely used in various filter products, such as glass fiber, polypropylene fiber, polyester fiber and PTFE fiber, which have been widely used in air purifiers, automotive air conditioning filters and masks. application. However, the fiber diameter of the conventional non-woven filter material is relatively large, and the filter pores formed by the accumulation of fibers are relatively large, and its filtering performance for particles with smaller particle sizes is poor. Therefore, there is a need for more effective air filter materials to filter fine particles. [0003] Nanofibers prepared by electrospinning have the advantages of small fiber diameter, small pore size, high porosity, and large specific surface area. The composite filter...

Claims

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Application Information

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IPC IPC(8): B01D46/54B32B27/02B32B27/32B32B27/12B32B5/02B32B27/36B32B5/26B32B33/00B32B5/06B32B27/30B32B7/12B32B27/28
CPCB01D46/543B32B5/02B32B5/06B32B5/26B32B7/12B32B27/12B32B27/28B32B27/30B32B27/302B32B27/304B32B27/36B32B33/00B32B2262/0238B32B2262/0253B32B2555/00B32B2605/08
Inventor 杨刚坤
Owner FOSHAN RIRISHENG TECH CO LTD
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