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Preparation method of transparent screen with PM2.5 fine particle filtering function

A transparent yarn and fine particle technology, applied in the field of screen window manufacturing, can solve the problems of limited filtering capacity of fine particles, poor air permeability and transparency, and large screen window aperture, etc., and achieve the effect of small fiber diameter, high transparency and good air permeability.

Active Publication Date: 2016-06-01
LVNA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The screens currently available on the market have relatively large apertures and have limited filtering capabilities for fine particles, making it difficult to provide effective protection.
However, some new fiber screens have poor air permeability and transparency.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Preparation method of transparent screen with PM2.5 fine particle filtering function
  • Preparation method of transparent screen with PM2.5 fine particle filtering function
  • Preparation method of transparent screen with PM2.5 fine particle filtering function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 7 g of polyacrylonitrile was added to 93 g of dimethylformamide, and fully stirred at 50° C. for 2 h to obtain a PAN / DMF spinning solution with a mass fraction of 7 wt %. Pour the solution into a tank equipped with a metal cylindrical electrode, use nylon gauze as the base, and carry out electrospinning under the conditions of an output voltage of 70Kv, a receiving distance of 14cm, a temperature of 30°C, and a humidity of 35%. A composite gauze with a nanofibrous film was obtained after 2 minutes of filamentation. The composite gauze was dried in hot air at 70° C. for 2 hours, and then cooled to room temperature naturally, and finally a transparent gauze with a filtration efficiency of 95% and a transparency of 75% was obtained.

[0027] The microscopic appearance of the nanofiber film on the transparent gauze of the present embodiment is as follows: figure 1 As shown, the fiber diameter distribution is as figure 2 As shown, the filtration efficiency test results of...

Embodiment 2

[0029] 7 g of polyacrylonitrile was added to 83 g of dimethylformamide, and fully stirred at 50° C. for 2 h to obtain a PAN / DMF spinning solution with a mass fraction of 7 wt %. Pour the solution into a tank equipped with a metal cylindrical electrode, use nylon gauze as the base, and carry out electrospinning under the conditions of an output voltage of 70Kv, a receiving distance of 14cm, a temperature of 30°C, and a humidity of 35%. A composite gauze with a nanofibrous film was obtained after 1 minute of filamentation. The composite gauze was dried in hot air at 70° C. for 2 hours, and then naturally cooled to room temperature to finally obtain a transparent gauze with a filtration efficiency of 90% and a transparency of 80%.

Embodiment 3

[0031] 10 g of polyacrylonitrile was added to 90 g of dimethylformamide, and fully stirred at 50° C. for 2 h to obtain a PAN / DMF spinning solution with a mass fraction of 10 wt %. Pour the solution into a tank equipped with metal cylindrical electrodes, use nylon gauze as the base, and carry out electrospinning under the conditions of an output voltage of 70Kv, a receiving distance of 12cm, a temperature of 30°C, and a humidity of 35%. A composite gauze with a nanofibrous film was obtained after 2 minutes of filamentation. The composite gauze was dried in hot air at 70° C. for 2 hours, and then naturally cooled to room temperature to finally obtain a transparent gauze with a filtration efficiency of 80% and a transparency of 75%.

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Abstract

The invention discloses a preparation method of a transparent screen with a PM2.5 fine particle filtering function. The preparation method comprises steps as follows: (1) dissolving a high-molecular polymer in a solvent, and performing stirring for dissolution at 48-55 DEG C for 1.5-2.5 h to prepare a spinning solution with the concentration of the high-molecular polymer being 6-20wt%; (2) preparing a nanofiber membrane on a nylon screen substrate by use of the spinning solution through electrostatic spinning to obtain a composite screen; (3) drying the composite screen in hot air at 65-75 DEG C for 1.5-2.5 h and naturally cooling the composite screen to the room temperature to obtain the transparent screen with the PM2.5 fine particle filtering efficiency being 70%-95% and the transparency being 40%-80%. The prepared transparent screen is high in transparency and good in breathability, has higher filtering efficiency for PM2.5 fine particles and is an excellent material in the indoor air filtering field.

Description

technical field [0001] The invention belongs to the technical field of screen window manufacture, and in particular relates to a preparation method of a transparent gauze with the function of filtering PM2.5 fine particles. Background technique [0002] With the continuous acceleration of industrialization, environmental pollution is becoming more and more serious, especially the problem of air pollution. In recent years, many provinces and cities in my country have experienced continuous smog, and the main "culprit" is dust, including notes on PM2.5 and PM10. The so-called PM2.5 refers to fine particulate matter in the air with a particle diameter of less than 2.5 μm, also known as particulate matter that can enter the lungs. PM2.5 particles are small and cannot be blocked by the respiratory tract. After being inhaled by the human body, they will be deposited in the alveoli and cannot be discharged. Therefore, long-term inhalation will affect the gas exchange of the lungs,...

Claims

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Application Information

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IPC IPC(8): D04H1/728D04H1/4382D01D5/00B01D39/16
Inventor 余煜玺谭晓林颜少乐
Owner LVNA TECH CO LTD
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