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Composite nano-fiber PM2.5 filtering material and preparation method thereof

A technology of composite nanofiber and filter material, which is applied in the field of composite nanofiber PM2.5 filter material and its preparation, can solve the problems of poor mechanical properties, hydrophilic air permeability, high airflow resistance, and low dust holding capacity, and achieve adhesion High precision, easy operation and uniform fiber distribution

Active Publication Date: 2017-07-07
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its disadvantages are low dust holding capacity, high airflow resistance, relatively poor mechanical properties and hydrophilic air permeability

Method used

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  • Composite nano-fiber PM2.5 filtering material and preparation method thereof
  • Composite nano-fiber PM2.5 filtering material and preparation method thereof
  • Composite nano-fiber PM2.5 filtering material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Step 1: Preparation of spinning solution

[0042] Weigh 10g of polyacrylonitrile (PAN) powder and dissolve it in 90g of N,N-dimethylformamide solution (DMF), stir at 80°C under a constant temperature magnetic stirrer for 4h until PAN is completely dissolved, and the prepared product has a mass percentage of 10 % PAN spinning solution; weigh 8g of gelatin particles and dissolve in 42g of acetic acid solution, stir at 60°C under a constant temperature heating magnetic stirrer for 2h until the gelatin particles are completely dissolved, and prepare a gelatin spinning solution with a mass percentage of 16%.

[0043] Step 2: Preparation of Composite Nanofibers

[0044] The above-mentioned PAN and gelatin spinning solution are mixed according to 1:1 and the spinning solution is injected into the liquid storage cylinder of the textile nozzle of the electrospinning machine (such as figure 1 shown), put the tinfoil paper on the receiving plate, turn on the PAN / gelatin mixed spi...

Embodiment 2

[0050] Step 1: Preparation of spinning solution

[0051] Weigh 12g of polyacrylonitrile (PAN) powder and dissolve it in 88g of N,N-dimethylformamide solution (DMF), stir at 80°C under a constant temperature magnetic stirrer for 4h until PAN is completely dissolved, and the prepared product has a mass percentage of 12 % PAN spinning solution; weigh 9g of gelatin particles and dissolve in 41g of acetic acid solution, stir at 60°C for 2h under a constant temperature heating magnetic stirrer until the gelatin particles are completely dissolved, and prepare a gelatin spinning solution with a mass percentage of 18%.

[0052] Step 2: Preparation of Composite Nanofibers

[0053] The above-mentioned PAN and gelatin spinning solution are mixed according to the volume ratio of 1:1 to prepare the spinning solution and inject it into the liquid storage cylinder of the textile nozzle of the electrospinning machine (such as figure 1 shown), place foil on the receiver plate. Turn on the PAN...

Embodiment 3

[0059] Step 1: Preparation of spinning solution

[0060] Weigh 16g of polyacrylonitrile (PAN) powder and dissolve it in 90g of N,N-dimethylformamide solution (DMF), stir at 80°C under a constant temperature magnetic stirrer for 4h until PAN is completely dissolved, and the prepared product has a mass percentage of 16 % PAN spinning solution; weigh 10 g of gelatin particles and dissolve in 40 g of acetic acid solution, stir at 60° C. under a constant temperature heating magnetic stirrer for 2 h until the gelatin particles are completely dissolved, and prepare a gelatin spinning solution with a mass percentage of 12%.

[0061] Step 2: Preparation of Composite Nanofibers

[0062] The above-mentioned PAN and gelatin spinning solution are mixed according to the volume ratio of 1:1 to prepare the spinning solution and inject it into the liquid storage cylinder of the textile nozzle of the electrospinning machine (such as figure 1 shown), place foil on the receiver plate. Turn on t...

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Abstract

The invention discloses a composite nano-fiber PM2.5 filtering material and a preparation method thereof. The material comprises a polyacrylonitrile and gelatin cross-linked composite nano-fiber film. An air filtering material provided by the invention with a polyacrylonitrile and gelatin composite nano-fiber netted cross-linked structure is acquired through the disposable electrostatic spinning and heating after-treatment. The diameter of the polyacrylonitrile and gelatin composite nano-fiber is 150-300nm, the porosity is 80%-90% and the average pore size is 0.5um-6um. The composite nano-fiber with compact structure, uniform netted cross-linking and better mechanical property and hydrophilic air permeability can be acquired; the filtering efficiency thereof for the NaCI aerosol with the median diameter of 200-300nm is 99.82%-99.91%; the pressure drop is 120-150Pa; the breaking strength is 10.92mPa; the elongation at break is 89.85%; the air permeability is 16820mL / (cm<2>.h). The material is especially suitable for the fields of personal protection products, air quality detecting equipment, air purifying equipment, and the like.

Description

technical field [0001] The invention belongs to the technical field of filter material preparation, and in particular relates to a composite nanofiber PM2.5 filter material and a preparation method thereof. Background technique [0002] With the development of industrialization, the pollution of the environment and air has further intensified, and the harm caused by PM2.5 has attracted worldwide attention. The method of air filtration can separate and trap the particles dispersed in the air. The electrospinning method can prepare a porous fiber membrane with a diameter of tens or hundreds of nanometers. The fiber membrane has a large specific surface area and a high porosity, and is very suitable for use as a filter material. It provides a new filter medium for high-efficiency air filtration and does not need to be replaced. As for the filter material, it only needs to clean the dust collection membrane regularly to ensure the performance of the membrane. Cheng Bowen and o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/16B01D46/54
CPCB01D39/16B01D46/0001B01D46/543B01D46/546B01D2239/0216B01D2239/025
Inventor 张静薛朝华张明明张姣姣
Owner SHAANXI UNIV OF SCI & TECH
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