Efficient and low-resistance electrospun nanofiber air filter material and batch preparation method

An air filter material and nanofiber technology, applied in the directions of electrospinning, chemical instruments and methods, separation methods, etc., can solve the problems of accelerating the surface charge dissipation of electret materials, attenuation of electret effect, and dissipation, etc., and achieve good results. Structural controllability, reducing filtration resistance, the effect of reducing filtration resistance

Inactive Publication Date: 2016-12-21
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the mechanical properties of porous fiber materials are poor, and the rapid volatilization of a large number of low-boiling solvents during the experiment will endanger people's health.
(3) For nanofiber membrane electret, the patent CN104289042A discloses "an electrospun nanofiber electret filter material and its preparation" and prepared nano Fibrous electret filter material, but does not give relevant data on whether the surface charge of the material will dissipate after long-term storage
During the storage an...

Method used

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  • Efficient and low-resistance electrospun nanofiber air filter material and batch preparation method
  • Efficient and low-resistance electrospun nanofiber air filter material and batch preparation method

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Embodiment 1

[0031]The filter material is a sandwich structure of spunbonded non-woven fabrics and nanofibers arranged alternately. The nanofibers are electrospun nanofiber / microsphere composite membranes. The structure of the electrospun nanofiber / microsphere composite membrane is: microspheres embedded in electrospun nanofibers The three-dimensional cavity structure formed between them; the diameter of the nanofiber is 139nm; the particle size of the microsphere is 658nm; the weight of the electrospun nanofiber / microsphere composite film is 1.08g / m 2 . The spunbonded nonwoven fabric used has a fiber diameter of 5 μm and a weight of 25 g / m 2 , The initial filtration efficiency of spunbond nonwovens is 0.2%.

[0032] A high-efficiency and low-resistance electrospun nanofiber air filter material and a batch preparation method, the specific steps are:

[0033] Step 1: Place the polyacrylonitrile powder in a vacuum drying oven and dry it under vacuum at 70°C for 8 hours;

[0034] Step 2: d...

Embodiment 2

[0040] The filter material is a sandwich structure of spunbonded non-woven fabrics and nanofibers arranged alternately. The nanofibers are electrospun nanofiber / microsphere composite membranes. The structure of the electrospun nanofiber / microsphere composite membrane is: microspheres embedded in electrospun nanofibers The three-dimensional cavity structure formed between them; the diameter of the nanofiber is 204nm; the particle size of the microsphere is 569nm; the weight of the electrospun nanofiber / microsphere composite film is 1.25g / m 2 . The spunbonded nonwoven fabric used has a fiber diameter of 5 μm and a weight of 30 g / m 2 , The initial filtration efficiency of spunbond nonwovens is 0.2%.

[0041] A high-efficiency and low-resistance electrospun nanofiber air filter material and a batch preparation method, the specific steps are:

[0042] Step 1: Place the polyacrylonitrile powder in a vacuum drying oven and dry it under vacuum at 70°C for 8 hours;

[0043] Step 2: ...

Embodiment 3

[0049] The filter material is a sandwich structure of spunbonded non-woven fabrics and nanofibers arranged alternately. The nanofibers are electrospun nanofiber / microsphere composite membranes. The structure of the electrospun nanofiber / microsphere composite membrane is: microspheres embedded in electrospun nanofibers The three-dimensional cavity structure formed between them; the diameter of the nanofiber is 236nm; the particle size of the microsphere is 631nm; the weight of the electrospun nanofiber / microsphere composite film is 1.96g / m 2 . The spunbonded nonwoven fabric used has a fiber diameter of 10 μm and a weight of 30 g / m 2 , The initial filtration efficiency of spunbond nonwovens is 0.1%.

[0050] A high-efficiency and low-resistance electrospun nanofiber air filter material and a batch preparation method, the specific steps are:

[0051] Step 1: Put the polyurethane particles in a vacuum drying oven and dry them under vacuum at 110°C for 8 hours;

[0052] Step 2: ...

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Abstract

The invention relates to an efficient and low-resistance electrospun nanofiber air filter material and a batch preparation method. The filter material is of a sandwich structure formed by alternately arraying spun-bonded nonwovens and nanofibers; by the adoption of a pinfree type electrostatic spinning nozzle and by an electrostatic spinning and electrostatic spraying synchronous combination technology, a nanofiber/microsphere composite film is prepared; a revolving rotary drum is used as a receiving device, and the spun-bonded nonwoven is used as a receiving matrix, so that a nanofiber/nonwoven composite material is obtained; a layer of spun-bonded nonwoven covers the surface of the nanofiber/nonwoven composite material to form the sandwich structure with the spun-bonded nonwovens and the nanofibers which are alternately arrayed; the sandwich structure is bonded to obtain the efficient and low-resistance electrospun nanofiber air filter material. The preparation process is simple, and high in controllability and repetitiveness, and the prepared air filter material has the characteristics of high efficiency and low resistance, and is uniform in thickness and stable in filter performance; batch production of the nanofiber filter material can be realized; the efficient and low-resistance electrospun nanofiber air filter material has very good application prospect in the field of air filtering.

Description

technical field [0001] The invention belongs to the field of air filter materials and preparation thereof, in particular to a high-efficiency and low-resistance electrospun nanofiber air filter material and a batch preparation method. Background technique [0002] With the deepening of my country's industrialization process and rapid economic development, the problem of air pollution is becoming more and more serious, especially in recent years, the PM2.5 (particles with a particle size less than 2.5 μm) pollution that has continued to appear in various parts of our country has caused serious threats to people's health. . Filtration as a protective measure can effectively resist the adverse effects of pollution on people. At present, my country's industry uses a large number of air filter materials based on glass fiber or melt-blown non-woven fabrics, which have a good filtering effect on particles above the micron level, but poor filtration efficiency on sub-micron or even ...

Claims

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Application Information

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IPC IPC(8): B01D39/14B01D39/16D01D5/00D04H1/728
CPCB01D39/14B01D39/1623B01D39/1653D01D5/0007D01D5/0069D04H1/728
Inventor 覃小红高涵超高婧张弘楠
Owner DONGHUA UNIV
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