Preparation method for efficient low-impedance antibacterial air purification filter membrane

A technology of air purification and membrane filtration, which is applied in the field of preparation of air filtration membranes, can solve problems such as poor antibacterial properties, high filtration resistance, and low filtration efficiency of composite nanofiber membranes, and achieve high air permeability, reduce filtration resistance, and increase strength. Effect

Active Publication Date: 2014-05-07
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of low filtration efficiency, high filtration resistance and poor antibacterial properties of the existing composite nanofiber membranes, the present invention proposes a preparation method of high-efficiency and low-impedance bacterial air purification filter membranes, which realizes the antibacterial properties and high efficiency of the air purification filter membranes. combination of excellent filterability

Method used

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  • Preparation method for efficient low-impedance antibacterial air purification filter membrane
  • Preparation method for efficient low-impedance antibacterial air purification filter membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Add 100g of PET into 500ml of TFA / DCM (the volume ratio of TFA and DCM is 4:1) mixed solvent, stir at room temperature for 3 hours until completely dissolved, and prepare PET spinning solution, then add 0.2g After stirring and dissolving, the graphene oxide was prepared into a homogeneous solution for use.

[0020] (2) Add 14g of PA6 into 50ml of formic acid solution, stir for 6 hours until PA6 is completely dissolved in formic acid, then add 0.02g of graphene oxide, stir to dissolve, and obtain a uniform solution for use.

[0021] (3) Put all the above two solutions into the syringe respectively, such as figure 1 As shown, controlling the feed rate of the PET solution to be 10 μl / min and the control voltage to be 20 kV, the feed rate of the PA6 solution to be 4 μl / min and the control voltage to be 18 kV, a PET / PA6 filter membrane is obtained. The average diameter of PET electrospun nanofibers is 700nm, the average diameter of PA6 electrospun nanofibers is only 130...

Embodiment 2

[0024] (1) Dissolve 100g of PAN in 500ml of dimethylformamide (DMF) solvent to prepare PAN spinning solution, stir at room temperature for 4h until completely dissolved, then add 0.5g of graphene oxide, stir to dissolve, A homogeneous solution was obtained.

[0025] (2) Dissolve 12g of PES in 50ml of dimethylformamide (DMF) solvent, stir for 6 hours until PES is completely dissolved in DMF, then add 0.05g of graphene oxide, stir and dissolve to obtain a uniform solution.

[0026] (3) Put all the above two solutions into the syringe respectively, such as figure 1 As shown, the feed rate of PAN solution is controlled to be 15 μl / min and the control voltage is 18 kV, the feed rate of PES solution is 8 μl / min and the control voltage is 22 kV to obtain a PAN / PES filter membrane. The average diameter of PAN electrospun nanofibers is 850 nm, the average diameter of PES electrospun nanofibers is only 200 nm, and the total film thickness is 68 μm.

[0027] After testing, the filter m...

Embodiment 3

[0029] (1) Dissolve 40g PS in 500ml of DMF solvent, stir at room temperature for 4h until completely dissolved, then add 0.5g of graphene oxide, stir and dissolve to obtain a uniform solution.

[0030] (2) Add 10g of PA66 into 50ml of formic acid solution, stir for 6 hours until PA66 is completely dissolved in formic acid, then add 0.05g of graphene oxide, stir and dissolve to obtain a uniform solution.

[0031] (3) Put all the above two solutions into the syringe respectively, such as figure 1 As shown, control the inflow rate of PS solution to be 15 μl / min and the control voltage to be 19kV, the inflow rate of PA66 solution to be 7 μl / min and the control voltage to be 20kV to obtain PS / PA66 filter membrane. The average diameter of PS electrospun nanofibers is 870 nm, the average diameter of PA66 electrospun nanofibers is only 150 nm, and the total film thickness is 30 μm.

[0032] After testing, the filter material has a retention rate of more than 96% for sodium chloride a...

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Abstract

The invention discloses a preparation method for an efficient low-impedance antibacterial air purification filter membrane. Two polymers A and B which can be used for preparing nanofibers with great diameter differences by an electrostatic spinning technology are selected, and are mixed with graphene oxide and a solvent to prepare two spinning solutions respectively, and a composite nanofiber filter membrane with a multilayer composite structure is prepared in a parallel electrospinning way. According to the preparation method, the graphene oxide is doped, so that the prepared nanofiber filter membrane is antibacterial; rough fiber layers are inserted into fine fiber layers to enable the fine fiber layers to be looser, so that the filter resistance of the membrane is reduced without reduction in the filter efficiency of the membrane; the filter membrane is detected to have sodium chloride aerosol particle rejection rate of over 96 percent, pressure drop of a less-than-28mm water column and Escherichia coli inhibition rate of over 90 percent.

Description

technical field [0001] The invention relates to the preparation of an air filter membrane, in particular to a preparation method of a high-efficiency and low-impedance bacterial air purification filter membrane, and belongs to the field of membrane technology. Background technique [0002] In recent years, filter protection materials have played an important role in industrial production links such as air purification, water purification and waste discharge, and have become an indispensable part of modern industrial production. With the development of various fields such as biology, medicine, and environmental protection, higher requirements are put forward for the filtration accuracy and protection effect of filter protection materials. [0003] The most direct way to prepare high-efficiency filter media is to use nano-sized fibers in the filter material. Electrospinning technology is currently the only method that can directly and continuously prepare polymer nanofibers. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4382D04H1/728B01D39/00B01D46/54
Inventor 任以伟周欢田恩玲王兴组李静
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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