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Light-transmitting, breathable and static electricity repellent PM2.5 air filter membrane and preparation method thereof

A PM2.5 and air filtration technology, applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve problems such as unfavorable human health, achieve high-efficiency electrostatic repulsion, increase transparency, and increase retention rate Effect

Active Publication Date: 2015-09-16
上海展恒环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This system itself can indeed work efficiently, but ordinary residential buildings are rarely able to install a fresh air system, so when using the air purifier, the doors and windows must be closed tightly, which is not good for human health after a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026]Preparation of ultra-thin electrospun nanofiber layer: dissolving polymer powder in a polar organic solvent to obtain a polymer solution, wherein the polymer powder is polyethersulfone, polysulfone, polyvinyl alcohol, polyethylene oxide, At least one of polylactic acid, polyacrylonitrile, polyurethane, polyethylene, polyamide, and polystyrene, and the polar organic solvent is N,N-dimethylformamide, N,N-dimethylacetamide Any one of amides, N-methylpyrrolidone, and dimethyl sulfoxide or a combination thereof.

[0027] The polymer solution is degassed in vacuum to obtain a spinning solution.

[0028] The nanofiber film layer is obtained by electrospinning with non-woven fabric or screen mesh as the collecting matrix. The temperature of the spinning solution is 10-50°C, the ambient temperature is 5-45°C, the relative humidity is 20-60%, the spinning voltage is 5000-30000V, the distance from the spinneret to the receiving plate is 8-20cm, and the barrel extrusion The output...

Embodiment 1

[0034] Electrospinning is carried out on the surface of PP non-woven fabric with polyurethane as material, and the weight of PP is 20g / m 2 .

[0035] Specifically, a certain mass of polyurethane (PU) was dissolved in N,N-dimethylacetamide DMAc (5-30% by mass), stirred at 60°C to obtain a polymer solution, and the polymer solution was Vacuum defoaming at 60° C. for 4 hours to prepare spinning solutions, and make spinning solutions with different concentrations.

[0036] Electrospinning was carried out under the following conditions: the temperature of the spinning solution was 30 °C, the ambient temperature was 50 °C, the relative humidity was 20%, the receiving distance was 11 cm, the barrel extrusion rate was 25 μL / min, and the negative voltage was -3 kV, the positive voltage is 9.03 ~ 9.08 kV.

[0037] Disperse the tourmaline powder in the aqueous solution of acrylic acid by using an ultrasonic cell pulverizer in proportion to obtain a suspension containing tourmaline nano...

Embodiment 2

[0039] Electrospinning is carried out on the surface of PET screen with polyacrylonitrile as the material. The fineness of the single filament of the screen is 500dtex, and the mesh number is 40 mesh.

[0040] Specifically, a certain mass of polyacrylonitrile (PAN) was dissolved in DMAc (5-30% by mass), stirred at 80°C to obtain a polymer solution, and the polymer solution was vacuum defoamed at 80°C The spinning solution was obtained in 4 hours, and the spinning solution with different concentrations was prepared, and electrospinning was carried out under the following conditions: the temperature of the spinning solution was 40°C, the ambient temperature was 60°C, the relative humidity was 20%, and the receiving distance was 10°C. cm, the barrel extrusion rate is 30 μL / min, the negative voltage is -3 kV, and the positive voltage is 9.39 kV.

[0041] Disperse the tourmaline powder in an aqueous solution of acrylic acid by using an ultrasonic cell pulverizer in proportion to ob...

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Abstract

The invention discloses a light-transmitting, breathable and static electricity repellent PM2.5 air filter membrane and the preparation method thereof. The air filter membrane is characterized by being provided with at least one layer of non-woven fabric base material or screen net and at least one layer of ultrathin electrostatic spinning nano fiber layer. The preparation method comprises the steps of impregnating the non-woven fabric base material, the screen net or the ultrathin electrostatic spinning nano fiber layer in a tourmaline nano-particle containing suspension or spraying the tourmaline-containing nano particle suspension on the on-woven fabric base material, the screen net or the ultrathin electrostatic spinning nano fiber layer and drying, wherein the mass percentage of tourmaline nano particles in the suspension is 1-30%, the suspension further comprises a bonding agent, so that the tourmaline nano particles can be wrapped on the surface of the non-woven fabric base material, the screen net or the ultrathin electrostatic spinning nano fiber layer. The air filter membrane applied in a window screen is prepared by adopting the nano fiber technique and electrostatic repulsion and fine particulate matter PM2.5 is guaranteed to be blocked outside when a window is opened for ventilation.

Description

technical field [0001] The invention relates to an air filter membrane, in particular discloses a light-transmitting, air-permeable, high-efficiency electrostatic repellent PM2.5 air filter composite membrane and a preparation method thereof, belonging to the technical field of air filter membranes. Background technique [0002] From the dust storm 10 years ago to today's smog, air pollution has plagued more than one billion Chinese people, and has caused various diseases including: asthma, respiratory tract infection, lung cancer and other respiratory diseases. It has a very serious impact on the health of the people, especially on groups with weak immunity such as children and the elderly, and is directly related to the national economy and people's livelihood. In recent years, smog has almost spread across more than 20 provinces, municipalities and autonomous regions across the country, lasting 10 to 20 days each time, bringing huge negative impacts on people's lives, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/48B01D71/56B01D71/26B01D69/12B01D67/00D06M11/80D06M15/263
Inventor 张秀芳李虎敏吴明华柴明飞
Owner 上海展恒环保科技有限公司
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