CN111974120A - Efficient PM2.5 filtering membrane and processing technology thereof - Google Patents
Efficient PM2.5 filtering membrane and processing technology thereof Download PDFInfo
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- CN111974120A CN111974120A CN202010892063.8A CN202010892063A CN111974120A CN 111974120 A CN111974120 A CN 111974120A CN 202010892063 A CN202010892063 A CN 202010892063A CN 111974120 A CN111974120 A CN 111974120A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0028—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions provided with antibacterial or antifungal means
Abstract
The invention relates to a high-efficiency PM2.5 filtering membrane and a processing technology thereof, belonging to the technical field of air purification. This high-efficient PM2.5 filtration membrane, including two-layer PM2.5 filter layers at least, the component of PM2.5 filter layer is: polylactic acid, polyvinyl alcohol, polyvinylpyrrolidone, polyimide, polymethyl methacrylate, polypropylene, polystyrene, polyvinyl chloride, polyvinyl butyral, antibacterial and antifungal nano particles and polyacrylonitrile; the antibacterial and mildewproof nano particle comprises the following components: silver oxide particles, zinc oxide particles, titanium dioxide particles, and silver nanoparticles. The PM2.5 filtering membrane is formed by polymer fibers, has the characteristics of controllable transparency and excellent PM2.5 filtering effect, has antibacterial and mildewproof performances due to the antibacterial and mildewproof nano particles, and can prevent the PM2.5 filtering membrane from mildewing in the using process to influence the filtering effect and the filtering efficiency.
Description
Technical Field
The invention relates to a high-efficiency PM2.5 filtering membrane and a processing technology thereof, belonging to the technical field of air purification.
Background
With the continuous rising of air temperature, the exposure of PM2.5 air pollution, the serious indoor air pollution, the improvement of the sealing performance and the heat preservation performance of a building, the urgent requirements of human existence on the control of air quality and the construction of human habitability air environment, the national control of indoor air pollution and the energy saving and indoor ventilation problems of the building are paid attention to, a series of national standards are developed successively, the requirement that fresh air must be introduced into a civil building is met, and meanwhile, the air quality of the fresh air, such as humidity, temperature, cleanliness, freshness and the like, is integrated to meet the requirements of the human habitability environment conditions.
Wherein PM2.5, also known as fine particulate matter, refers to particles having an aerodynamic equivalent diameter of 2.5 microns or less, and PM10 refers to particles having an aerodynamic equivalent diameter of 10 microns or less. These ultra-fine particles are diffused in the atmosphere, and the diffusion area in the air is large, so that the handling is difficult. Especially, PM2.5, because of its fine particle size, can be inhaled directly by the human body, and it cannot be removed effectively by ordinary masks, filter membranes, etc., and is liable to cause great damage to the human body. Therefore, air purifiers and filtering devices capable of filtering PM2.5 attract a lot of attention.
The existing filtering membrane for filtering and removing PM2.5 still has the defects of high production cost, common filtering effect, poor transparency and the like.
Disclosure of Invention
The invention aims to solve the technical problem of providing a high-efficiency PM2.5 filtering membrane with low production cost and good filtering effect and a processing technology thereof aiming at the defects of the prior art.
The technical scheme provided by the invention for solving the technical problems is as follows: a high-efficiency PM2.5 filtering membrane comprises at least two PM2.5 filtering layers, wherein the PM2.5 filtering layers comprise the following components in percentage by weight: 2.1-3.3% of polylactic acid, 1.3-1.8% of polyvinyl alcohol, 3.3-6.5% of polyvinylpyrrolidone, 6.3-8.6% of polyimide, 13.6-18.8% of polymethyl methacrylate, 8.1-10.5% of polypropylene, 3.5-6.5% of polystyrene, 2.5-5.5% of polyvinyl chloride, 11.8-15.6% of polyvinyl butyral, 0.25-0.85% of antibacterial and mildewproof nano particles and the balance of polyacrylonitrile;
the antibacterial and mildewproof nano particle comprises the following components in percentage by weight: 8.3 to 11.5 percent of silver oxide particles, 15.3 to 20.5 percent of zinc oxide particles, 14.5 to 18.5 percent of titanium dioxide particles and the balance of nano silver particles.
The improvement of the technical scheme is as follows: the average diameter of the antibacterial and mildewproof nano particles is 20-60 nm.
The improvement of the technical scheme is as follows: the PM2.5 filter layer comprises the following components in percentage by weight: 2.5% of polylactic acid, 1.4% of polyvinyl alcohol, 3.6% of polyvinylpyrrolidone, 6.5% of polyimide, 13.8% of polymethyl methacrylate, 8.6% of polypropylene, 3.5% of polystyrene, 2.5% of polyvinyl chloride, 12.5% of polyvinyl butyral, 0.25% of antibacterial and mildewproof nano-particles and the balance of polyacrylonitrile;
the antibacterial and mildewproof nano particle comprises the following components in percentage by weight: 8.5% of silver oxide particles, 15.5% of zinc oxide particles, 14.5% of titanium dioxide particles and the balance of nano-silver particles.
The improvement of the technical scheme is as follows: the PM2.5 filter layer comprises the following components in percentage by weight: 3.3% of polylactic acid, 1.8% of polyvinyl alcohol, 6.5% of polyvinylpyrrolidone, 8.6% of polyimide, 18.8% of polymethyl methacrylate, 10.5% of polypropylene, 6.5% of polystyrene, 5.5% of polyvinyl chloride, 15.6% of polyvinyl butyral, 0.85% of antibacterial and mildewproof nano particles and the balance of polyacrylonitrile;
the antibacterial and mildewproof nano particle comprises the following components in percentage by weight: 8.3 to 11.5 percent of silver oxide particles, 15.3 to 20.5 percent of zinc oxide particles, 14.5 to 18.5 percent of titanium dioxide particles and the balance of nano silver particles.
The processing technology of the high-efficiency PM2.5 filtering membrane comprises the following steps:
(1) preparing materials: the raw materials are proportioned according to the weight percentage of each component of the PM2.5 filter layer;
(2) dissolving: adding a solvent into the mixed raw materials for dissolving;
(3) gas spinning the solution of raw materials: preparing a substrate, conveying a solution of raw materials to a gas spinning nozzle, supplying a carrier gas to the gas spinning nozzle so that a polymer solution is sprayed out from the gas spinning nozzle under the action of the carrier gas, wherein the gas spinning nozzle is arranged opposite to the substrate and has the diameter range of 15 mu m-2cm, and a PM2.5 filter layer is formed on the substrate;
(4) inputting at least two PM2.5 filter layers into a needling machine for needling reinforcement, winding and cutting to obtain a high-efficiency PM2.5 filter membrane rough blank with the thickness of 5-20 mm and the density of 150-200 g/m 2;
(5) carrying out hot pressing on the high-efficiency PM2.5 filter membrane coarse blank at the temperature of 160-;
(6) passing the high-efficiency PM2.5 filter membrane rough blank after hot pressing through two continuous high-voltage corona discharge electric fields, wherein the voltage is 35-50kV, and the discharge time is 8 s;
(7) and cutting the high-efficiency PM2.5 filtering membrane rough blank passing through the high-voltage corona discharge electric field to obtain the high-efficiency PM2.5 filtering membrane.
The improvement of the technical scheme is as follows: the solvent in the step (2) is one or more of water, methanol, ethanol, diethyl ether, butanol, propanol and glycol.
The invention adopts the technical scheme that the method has the beneficial effects that:
(1) the PM2.5 filtering membrane is formed by polymer fibers, has the characteristics of controllable transparency and excellent PM2.5 filtering effect, has antibacterial and mildewproof performances due to the antibacterial and mildewproof nano particles, and can prevent the PM2.5 filtering membrane from mildewing in the using process to influence the filtering effect and the filtering efficiency;
(2) in the processing technology of the PM2.5 filtering membrane, the mechanical property of the PM2.5 filtering membrane is improved through the matching of air spinning, needling reinforcement and hot pressing, so that the flexibility and the durability of the PM2.5 filtering membrane are greatly improved, and the service life of the PM2.5 filtering membrane is prolonged;
(3) the processing technology of the PM2.5 filtering membrane uses the high-voltage corona discharge electric field, so that the filtering efficiency of the PM2.5 filtering membrane is greatly improved, and the wind resistance is obviously reduced.
Detailed Description
Example 1
The high-efficiency PM2.5 filtering membrane of the embodiment comprises at least two PM2.5 filtering layers, wherein the PM2.5 filtering layers comprise the following components in percentage by weight: 2.5% of polylactic acid, 1.4% of polyvinyl alcohol, 3.6% of polyvinylpyrrolidone, 6.5% of polyimide, 13.8% of polymethyl methacrylate, 8.6% of polypropylene, 3.5% of polystyrene, 2.5% of polyvinyl chloride, 12.5% of polyvinyl butyral, 0.25% of antibacterial and mildewproof nano-particles and the balance of polyacrylonitrile;
the antibacterial and mildewproof nano particle comprises the following components in percentage by weight: 8.5% of silver oxide particles, 15.5% of zinc oxide particles, 14.5% of titanium dioxide particles and the balance of nano-silver particles; the average diameter of the antibacterial and mildewproof nano particles is 30 nm.
The processing technology of the high-efficiency PM2.5 filtering membrane comprises the following steps:
(1) preparing materials: the raw materials are proportioned according to the weight percentage of each component of the PM2.5 filter layer;
(2) dissolving: adding a solvent into the mixed raw materials for dissolving; the solvent is one or more of water, methanol, ethanol, diethyl ether, butanol, propanol, and ethylene glycol.
(3) Gas spinning the solution of raw materials: preparing a substrate, conveying a solution of raw materials to a gas spinning nozzle, supplying a carrier gas to the gas spinning nozzle so that a polymer solution is sprayed out from the gas spinning nozzle under the action of the carrier gas, wherein the gas spinning nozzle is arranged opposite to the substrate and has the diameter range of 15 mu m-2cm, and a PM2.5 filter layer is formed on the substrate;
(4) inputting at least two PM2.5 filter layers into a needling machine for needling reinforcement, winding and cutting to obtain a high-efficiency PM2.5 filter membrane rough blank with the thickness of 5-20 mm and the density of 150-200 g/m 2;
(5) carrying out hot pressing on the high-efficiency PM2.5 filter membrane coarse blank at the temperature of 160-;
(6) passing the high-efficiency PM2.5 filter membrane rough blank after hot pressing through two continuous high-voltage corona discharge electric fields, wherein the voltage is 35-50kV, and the discharge time is 8 s;
(7) and cutting the high-efficiency PM2.5 filtering membrane rough blank passing through the high-voltage corona discharge electric field to obtain the high-efficiency PM2.5 filtering membrane.
Example 2
The high-efficiency PM2.5 filtering membrane of the embodiment comprises three PM2.5 filtering layers, wherein the PM2.5 filtering layers comprise the following components in percentage by weight: 3.3% of polylactic acid, 1.8% of polyvinyl alcohol, 6.5% of polyvinylpyrrolidone, 8.6% of polyimide, 18.8% of polymethyl methacrylate, 10.5% of polypropylene, 6.5% of polystyrene, 5.5% of polyvinyl chloride, 15.6% of polyvinyl butyral, 0.85% of antibacterial and mildewproof nano particles and the balance of polyacrylonitrile;
the antibacterial and mildewproof nano particle comprises the following components in percentage by weight: 8.3 to 11.5 percent of silver oxide particles, 15.3 to 20.5 percent of zinc oxide particles, 14.5 to 18.5 percent of titanium dioxide particles and the balance of nano silver particles. The average diameter of the antibacterial and mildewproof nano particles is 20-60 nm.
The processing technology of the high-efficiency PM2.5 filtering membrane comprises the following steps:
(1) preparing materials: the raw materials are proportioned according to the weight percentage of each component of the PM2.5 filter layer;
(2) dissolving: adding a solvent into the mixed raw materials for dissolving; the solvent is water.
(3) Gas spinning the solution of raw materials: preparing a substrate, conveying a solution of raw materials to a gas spinning nozzle, supplying a carrier gas to the gas spinning nozzle so that a polymer solution is sprayed out from the gas spinning nozzle under the action of the carrier gas, wherein the gas spinning nozzle is arranged opposite to the substrate and has the diameter range of 15 mu m-2cm, and a PM2.5 filter layer is formed on the substrate;
(4) inputting the three PM2.5 filter layers into a needling machine for needling reinforcement, winding and cutting to obtain a high-efficiency PM2.5 filter membrane rough blank with the thickness of 5-20 mm and the density of 150-200 g/m 2;
(5) carrying out hot pressing on the high-efficiency PM2.5 filter membrane coarse blank at the temperature of 160-;
(6) passing the high-efficiency PM2.5 filter membrane rough blank after hot pressing through two continuous high-voltage corona discharge electric fields, wherein the voltage is 35-50kV, and the discharge time is 8 s;
(7) and cutting the high-efficiency PM2.5 filtering membrane rough blank passing through the high-voltage corona discharge electric field to obtain the high-efficiency PM2.5 filtering membrane.
The present invention is not limited to the above-described embodiments. All technical solutions formed by equivalent substitutions fall within the protection scope of the claims of the present invention.
Claims (6)
1. A high-efficient PM2.5 filtration membrane which characterized in that: the filter comprises at least two PM2.5 filter layers, wherein the PM2.5 filter layers comprise the following components in percentage by weight: 2.1-3.3% of polylactic acid, 1.3-1.8% of polyvinyl alcohol, 3.3-6.5% of polyvinylpyrrolidone, 6.3-8.6% of polyimide, 13.6-18.8% of polymethyl methacrylate, 8.1-10.5% of polypropylene, 3.5-6.5% of polystyrene, 2.5-5.5% of polyvinyl chloride, 11.8-15.6% of polyvinyl butyral, 0.25-0.85% of antibacterial and mildewproof nano particles and the balance of polyacrylonitrile;
the antibacterial and mildewproof nano particle comprises the following components in percentage by weight: 8.3 to 11.5 percent of silver oxide particles, 15.3 to 20.5 percent of zinc oxide particles, 14.5 to 18.5 percent of titanium dioxide particles and the balance of nano silver particles.
2. A high efficiency PM2.5 filtration membrane according to claim 1, characterized in that: the average diameter of the antibacterial and mildewproof nano particles is 20-60 nm.
3. A high efficiency PM2.5 filtration membrane according to claim 2, characterized in that: the PM2.5 filter layer comprises the following components in percentage by weight: 2.5% of polylactic acid, 1.4% of polyvinyl alcohol, 3.6% of polyvinylpyrrolidone, 6.5% of polyimide, 13.8% of polymethyl methacrylate, 8.6% of polypropylene, 3.5% of polystyrene, 2.5% of polyvinyl chloride, 12.5% of polyvinyl butyral, 0.25% of antibacterial and mildewproof nano-particles and the balance of polyacrylonitrile;
the antibacterial and mildewproof nano particle comprises the following components in percentage by weight: 8.5% of silver oxide particles, 15.5% of zinc oxide particles, 14.5% of titanium dioxide particles and the balance of nano-silver particles.
4. A high efficiency PM2.5 filtration membrane according to claim 2, characterized in that: the PM2.5 filter layer comprises the following components in percentage by weight: 3.3% of polylactic acid, 1.8% of polyvinyl alcohol, 6.5% of polyvinylpyrrolidone, 8.6% of polyimide, 18.8% of polymethyl methacrylate, 10.5% of polypropylene, 6.5% of polystyrene, 5.5% of polyvinyl chloride, 15.6% of polyvinyl butyral, 0.85% of antibacterial and mildewproof nano particles and the balance of polyacrylonitrile;
the antibacterial and mildewproof nano particle comprises the following components in percentage by weight: 8.3 to 11.5 percent of silver oxide particles, 15.3 to 20.5 percent of zinc oxide particles, 14.5 to 18.5 percent of titanium dioxide particles and the balance of nano silver particles.
5. A process for the production of a high efficiency PM2.5 filtration membrane according to any one of claims 1 to 4, wherein: the method comprises the following steps:
(1) preparing materials: the raw materials are proportioned according to the weight percentage of each component of the PM2.5 filter layer;
(2) dissolving: adding a solvent into the mixed raw materials for dissolving;
(3) gas spinning the solution of raw materials: preparing a substrate, sending a solution of raw materials to an air spinning nozzle, supplying a carrier gas to the air spinning nozzle so that the polymer solution is sprayed out from the air spinning nozzle under the action of the carrier gas, wherein the air spinning nozzle is arranged opposite to the substrate and has the diameter range of 15 mu m-2cm, and a PM2.5 filter layer is formed on the substrate;
(4) inputting at least two PM2.5 filter layers into a needling machine for needling reinforcement, winding and cutting to obtain a high-efficiency PM2.5 filter membrane rough blank with the thickness of 5-20 mm and the density of 150-200 g/m 2;
(5) carrying out hot pressing on the high-efficiency PM2.5 filter membrane coarse blank at the temperature of 160-;
(6) passing the high-efficiency PM2.5 filter membrane rough blank after hot pressing through two continuous high-voltage corona discharge electric fields, wherein the voltage is 35-50kV, and the discharge time is 8 s;
(7) and cutting the high-efficiency PM2.5 filtering membrane rough blank passing through the high-voltage corona discharge electric field to obtain the high-efficiency PM2.5 filtering membrane.
6. The processing technology of the high-efficiency PM2.5 filtering membrane according to claim 5, characterized in that: the solvent in the step (2) is one or more of water, methanol, ethanol, diethyl ether, butanol, propanol and glycol.
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| CN202010892063.8A CN111974120A (en) | 2020-08-31 | 2020-08-31 | Efficient PM2.5 filtering membrane and processing technology thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20201124 |