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Transparent PM2.5 filtering membrane with photocatalysis and preparation method of transparent PM2.5 filtering membrane

A filter membrane, photocatalysis technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, separation methods, etc., can solve the problem of single function, poor air permeability, low light transmittance of air filter membrane problem, to achieve the effect of high-efficiency filtration performance, stable performance and good lighting

Active Publication Date: 2018-03-06
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a kind of transparent PM2.5 filter film with photocatalysis and its preparation method for the deficiencies in the above-mentioned prior art, and improve the low light transmittance and poor air permeability of the existing air filter film And the problem of single function is suitable for indoor air purification devices and window screen materials and other fields

Method used

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  • Transparent PM2.5 filtering membrane with photocatalysis and preparation method of transparent PM2.5 filtering membrane
  • Transparent PM2.5 filtering membrane with photocatalysis and preparation method of transparent PM2.5 filtering membrane
  • Transparent PM2.5 filtering membrane with photocatalysis and preparation method of transparent PM2.5 filtering membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0044] S1, spinning solution preparation

[0045] Weigh 3g of polyacrylonitrile powder (PAN), 0.6g of nano titanium dioxide powder (TiO 2 ), 47g N,N-dimethylformamide (DMF), slowly add the PAN powder to the DMF solution, magnetically stir at 25℃ for 8h, and then add the nano-TiO 2 Slowly add to the solution, continue to stir at 25℃ for 8h, prepare PAN@TiO with a mass fraction of 6% 2 Spinning solution: Weigh 6g polyamide-6 particles (PA6) and dissolve in 44g formic acid solution, magnetically stir at 25°C for 18h until PA6 particles are completely dissolved, and prepare 12% PA6 spinning solution for use.

[0046] S2, PAN@TiO 2 / PA6 composite nanofiber preparation

[0047] Add the above PAN@TiO 2 The spinning solution and PA6 spinning solution are respectively injected into the two liquid storage cylinders of the syringe 2 in the micro-injection pump 3, put the tin foil on the receiving device 5, start the high-voltage power supply 1, and the spinneret 4 starts to work (such as figure ...

Embodiment 2

[0053] S1, spinning solution preparation

[0054] Weigh 4g polyacrylonitrile powder (PAN), 0.8g nano titanium dioxide powder (TiO 2 ), 46g N,N-dimethylformamide (DMF). Add the PAN powder slowly to the DMF solution, stir magnetically for 12 hours at 25°C, and then add the nano-TiO 2 Slowly add to the solution, continue to stir at 25℃ for 12h, and prepare PAN@TiO with a mass fraction of 8% 2 Spinning solution: Weigh 7g of polyamide-6 particles (PA6) and dissolve in 43g of formic acid solution, and magnetically stir at 25°C for 24 hours until the PA6 particles are completely dissolved to prepare a 14% by mass PA6 spinning solution.

[0055] S2, PAN@TiO 2 / PA6 composite nanofiber preparation

[0056] Add the above PAN@TiO 2 The spinning solution and PA6 spinning solution are respectively injected into the two liquid storage cylinders of the syringe 2 in the micro-injection pump 3, put the tin foil on the receiving device 5, start the high-voltage power supply 1, and the spinneret 4 start...

Embodiment 3

[0062] S1, spinning solution preparation

[0063] Weigh 5g polyacrylonitrile powder (PAN), 1g nano titanium dioxide powder (TiO 2 ), 45g N,N-dimethylformamide (DMF). Add the PAN powder slowly to the DMF solution, stir magnetically for 12 hours at 25°C, and then add the nano-TiO 2 Slowly add to the solution, continue stirring at 25°C for 12h to prepare PAN@TiO2 spinning solution with a mass fraction of 10%; weigh 8g polyamide-6 particles (PA6) and dissolve in 42g formic acid solution, stir magnetically at 25°C for 24h Until the PA6 particles are completely dissolved, a PA6 spinning solution with a mass percentage of 16% is prepared.

[0064] S2, PAN@TiO 2 / PA6 composite nanofiber preparation

[0065] Add the above PAN@TiO 2 And polyamide-6 spinning solution were respectively injected into the two liquid storage cylinders of the syringe 2 in the micro syringe pump 3, put the tin foil paper on the receiving device 5, start the high-voltage power supply 1, and the spinneret 4 began to w...

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Abstract

The invention discloses a transparent PM2.5 filtering membrane with photocatalysis and a preparation method of the transparent PM2.5 filtering membrane. The transparent PM2.5 filtering membrane is a composite nano fiber membrane of a sandwich-like structure and comprises polyacrylonitrile @TiO2 and polyamide-6, wherein the nano fiber diameter of the composite nano fiber membrane is 60-100nm. The composite membrane is densely cross-linked in a net manner and meanwhile has a photocatalysis function, high transparency and an efficient PM2.5 filtration property, when being applied to a protectivenano screen window, the membrane is capable of not only effectively preventing outdoor PM2.5 from entering a room, but also photocatalyzing low-concentration harmful gases in the atmosphere in a photocatalysis manner under the action of sunshine, and meanwhile good lighting and ventilation effects are maintained.

Description

Technical field [0001] The invention belongs to the technical field of filter material preparation, and specifically relates to a transparent PM2.5 high-efficiency filter membrane with photocatalytic properties and a preparation method thereof. Background technique [0002] With the development of industrialization, the pollution of the environment and the air has also intensified, and the harm caused by PM2.5 has attracted worldwide attention. PM2.5 is called "lungable particulate matter", which can directly enter the human lungs. Because it contains toxic and harmful substances, it stays in the air for a long time and has a long transportation distance, it will inevitably affect the quality of the atmospheric environment and human health. Negative impact. In addition, indoor air quality has also attracted people’s attention. Especially during severe haze, the PM2.5 value in indoor air is even higher than outdoor air. At the same time, the indoor VOCs concentration caused by in...

Claims

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Application Information

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IPC IPC(8): B01D46/54B01D53/86B01D53/44B01D67/00B01D69/12B01J31/38B01J35/06
CPCB01D46/543B01D53/8687B01D67/0079B01D69/12B01J31/38B01J35/59B01J35/39
Inventor 张静熊叶薛朝华张明明
Owner SHAANXI UNIV OF SCI & TECH
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