Method for manufacturing electrospun nanofiber gas filtering material in mass manner

A nanofiber and filter material technology, applied in chemical instruments and methods, filtration separation, fiber treatment, etc., can solve the problem of low filtration resistance, no data on filtration efficiency and resistance, no data on product filtration efficiency and resistance, etc. problems, achieve low filter resistance, improve strength, and reduce gaps

Inactive Publication Date: 2015-12-09
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

An anti-smog mask with dual functions of filtration and adsorption prepared by designing the mask structure [Chen Mingwei et al. An anti-smog mask with dual functions of filtration and adsorption based on nanostructures [P]. Chinese patent: ZL201410490840.0, 2014 -09-23], the filter material can be replaced, but there is no data on the filtration efficiency and resistance of the product and after repeated cleaning and use
In addition, two patents applied by Guizhou Provincial Institute of Analysis and Testing, [Song G...

Method used

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  • Method for manufacturing electrospun nanofiber gas filtering material in mass manner
  • Method for manufacturing electrospun nanofiber gas filtering material in mass manner
  • Method for manufacturing electrospun nanofiber gas filtering material in mass manner

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Dissolve 5g of polyacrylonitrile in 45g of N,N-dimethylformamide, stir for 8h until completely dissolved, and obtain polyacrylonitrile / N,N-dimethylformamide with a concentration of 10% (g / g) spinning solution. The patent application number is CN201310032194.9 electrospinning nozzle for electrospinning, the parameters are: voltage 60KV, receiving distance 15cm, drum speed 30r / min, spinning time 10min, ambient temperature 25°C, ambient relative humidity 55%.

[0040] Using the drum as the receiving device, a nanofiber membrane with high filtration efficiency, low filtration resistance and good air permeability is prepared, and a nonwoven / electrospun nanofiber membrane / nonwoven composite membrane is prepared by ultrasonic bonding, which is prepared by cutting. filter material.

[0041] The filter materials prepared by the above method were made into 3 samples, and their filtration efficiency, filter resistance, air permeability and nonwoven / electrospun nanofiber membrane...

Embodiment 2

[0046] Dissolve 7g of polyacrylonitrile in 43g of N,N-dimethylformamide, stir for 8h until completely dissolved to obtain polyacrylonitrile / N,N-dimethylformamide with a concentration of 10% (g / g) spinning solution. The patent application number is CN201310032194.9 electrospinning nozzle for electrospinning, the parameters are: voltage 68KV, receiving distance 20cm, drum speed 30r / min, spinning time 15min, ambient temperature 27°C, ambient relative humidity 45%.

[0047] Using the drum as the receiving device, a nanofiber membrane with high filtration efficiency, low filtration resistance and good air permeability is prepared, and a nonwoven / electrospun nanofiber membrane / nonwoven composite membrane is prepared by ultrasonic bonding, which is prepared by cutting. filter material.

[0048] The filter material prepared by the above method is made into 3 samples, and their filtration efficiency, filter resistance, air permeability and nonwoven / electrospun nanofiber membrane / nonw...

Embodiment 3

[0052] Dissolve 5g of polyvinylidene fluoride in 45g of N,N-dimethylformamide, stir for 8h until completely dissolved, and obtain polyacrylonitrile / N,N-dimethylformamide with a concentration of 10% (g / g). Amide spinning solution. The patent application number is CN201310032194.9 electrospinning nozzle for electrospinning, the parameters are: voltage 65KV, receiving distance 15cm, drum speed 60r / min, spinning time 20min, ambient temperature 25°C, ambient relative humidity 40%.

[0053] Using the drum as the receiving device, a nanofiber membrane with high filtration efficiency, low filtration resistance and good air permeability is prepared, and a nonwoven / electrospun nanofiber membrane / nonwoven composite membrane is prepared by ultrasonic bonding, which is prepared by cutting. filter material.

[0054] The filter material prepared by the above method is made into 3 samples, and their filtration efficiency, filter resistance, air permeability and nonwoven / electrospun nanofibe...

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Abstract

The invention discloses a method for manufacturing an electrospun nanofiber gas filtering material in a mass manner by using an umbrella-shaped electrostatic spinning sprayer. The method comprises: dissolving a high-molecular polymer in a solvent, mixing to obtain an even solution; using the spinning solution in electrostatic spinning to obtain a nanofiber membrane; combining the nanofiber membrane with a non-woven fabric, manufacturing non-woven fabric/nanofilm/ non-woven fabric composite film; performing ultrasonic bonding on the non-woven fabric/nanofilm/ non-woven fabric composite film, to manufacture a filtering material. The manufacturing method is convenient and fast, and can realize small-batch production. Filtering efficiency of the obtained filtering material reaches up to 99.55%, filtering resistance is 150-200 Pa, gas permeability reaches 355L.m<-2>.s<-1>, and moisture-penetrability reaches 9.6 m<2>.Pa/w, that is, the material has good gas permeability and moisture penetrability, and the method has very good application prospect in the field of air filtering.

Description

technical field [0001] The invention belongs to the application field of electrospinning nanofiber membranes, and in particular relates to a method for mass-preparing electrospinning nanofiber gas filter materials by using an umbrella-shaped electrospinning nozzle. Background technique [0002] In recent years, the problem of air pollution has been serious and has spread to major cities in my country, such as PM2.5, commonly known as "smog". As daily protective equipment, filter products can effectively resist the threat of PM2.5 to human health (including various diseases such as pneumonia, asthma and decreased lung function). At present, the filtration products on the market include carbon fiber felt pads, polymer fabrics, and non-woven fabrics. Among them, there are two main types that occupy a large market share. One is non-woven fabric products, which have low filtration efficiency and are difficult to meet people's high environmental cleanliness. One is the product ob...

Claims

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Application Information

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IPC IPC(8): D04H1/728B01D39/16D01D5/00
CPCB01D67/0002B01D69/02B01D71/26B01D71/28B01D71/30B01D71/34B01D71/42B01D71/56B01D71/58B01D71/74D04H1/4382D04H1/728D04H1/76
Inventor 覃小红娄莉华张弘楠凌超赵晓
Owner DONGHUA UNIV
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