CN116983756A - Nonmetal static antibacterial/deodorizing/washable multifunctional air filter material and preparation method thereof - Google Patents
Nonmetal static antibacterial/deodorizing/washable multifunctional air filter material and preparation method thereof Download PDFInfo
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- CN116983756A CN116983756A CN202310917147.6A CN202310917147A CN116983756A CN 116983756 A CN116983756 A CN 116983756A CN 202310917147 A CN202310917147 A CN 202310917147A CN 116983756 A CN116983756 A CN 116983756A
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- 239000000463 material Substances 0.000 title claims abstract description 57
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 42
- 229910052755 nonmetal Inorganic materials 0.000 title claims abstract description 20
- 230000001877 deodorizing effect Effects 0.000 title claims abstract description 13
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 230000003068 static effect Effects 0.000 title claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 32
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 23
- 241000894006 Bacteria Species 0.000 claims abstract description 19
- 239000003365 glass fiber Substances 0.000 claims abstract description 17
- 229920005906 polyester polyol Polymers 0.000 claims abstract description 15
- 229920002635 polyurethane Polymers 0.000 claims abstract description 15
- 239000004814 polyurethane Substances 0.000 claims abstract description 15
- 239000000084 colloidal system Substances 0.000 claims abstract description 14
- 244000052616 bacterial pathogen Species 0.000 claims abstract description 13
- 239000002131 composite material Substances 0.000 claims abstract description 13
- 238000005516 engineering process Methods 0.000 claims abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000741 silica gel Substances 0.000 claims abstract description 11
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 11
- 238000009210 therapy by ultrasound Methods 0.000 claims abstract description 11
- 239000000126 substance Substances 0.000 claims abstract description 7
- 229940079593 drug Drugs 0.000 claims abstract description 6
- 239000003814 drug Substances 0.000 claims abstract description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 18
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 13
- 241000191967 Staphylococcus aureus Species 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 229910021529 ammonia Inorganic materials 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 8
- 241000222122 Candida albicans Species 0.000 claims description 7
- 241000588724 Escherichia coli Species 0.000 claims description 7
- 229940095731 candida albicans Drugs 0.000 claims description 7
- 239000002781 deodorant agent Substances 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 230000002147 killing effect Effects 0.000 claims description 5
- RJQXTJLFIWVMTO-TYNCELHUSA-N Methicillin Chemical compound COC1=CC=CC(OC)=C1C(=O)N[C@@H]1C(=O)N2[C@@H](C(O)=O)C(C)(C)S[C@@H]21 RJQXTJLFIWVMTO-TYNCELHUSA-N 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 244000053095 fungal pathogen Species 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 229960003085 meticillin Drugs 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 230000000369 enteropathogenic effect Effects 0.000 claims description 2
- 230000004888 barrier function Effects 0.000 claims 1
- 244000005700 microbiome Species 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 3
- 230000001954 sterilising effect Effects 0.000 description 8
- 238000004659 sterilization and disinfection Methods 0.000 description 7
- 238000004887 air purification Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 230000009993 protective function Effects 0.000 description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 230000036541 health Effects 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 3
- 239000002121 nanofiber Substances 0.000 description 3
- 241000233866 Fungi Species 0.000 description 2
- 206010020751 Hypersensitivity Diseases 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 241000700605 Viruses Species 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- 239000013566 allergen Substances 0.000 description 2
- 230000007815 allergy Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000011941 photocatalyst Substances 0.000 description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 230000000241 respiratory effect Effects 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 230000004543 DNA replication Effects 0.000 description 1
- 229920001410 Microfiber Polymers 0.000 description 1
- 208000026935 allergic disease Diseases 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010041 electrostatic spinning Methods 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 239000003658 microfiber Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000035897 transcription Effects 0.000 description 1
- 238000013518 transcription Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0442—Antimicrobial, antibacterial, antifungal additives
Abstract
A nonmetallic static antibacterial/deodorizing/washable multifunctional air filter material and a preparation method thereof. Taking a certain amount of polyester polyol and glass fiber, vacuum stirring and dehydrating at 100 ℃ for 2.5 h, and carrying out ultrasonic treatment at 100 ℃ for 30 min; adding MDI, stirring rapidly and uniformly, pouring into a mesh silica gel mold preheated at 120 ℃ after the reaction is initiated, and preserving heat for a period of time to obtain a nonmetal polyurethane filter material frame; the nano silver antibacterial colloid with the diameter of 5-20nm is coated on the surface of the filter material frame by adopting a physical and chemical curing technology to form a composite network structure. Not only can entrap solid suspended matters, colloid, bacteria and the like in the air, but also can kill microorganisms, pathogenic bacteria and drug-resistant bacteria thereof; PM2.5, visible ash, automobile exhaust, pollen and the like can be effectively blocked. The invention can sterilize rapidly and efficiently, avoid secondary pollution, purify air efficiently, and the filter element material can be reused, which is beneficial to environmental protection.
Description
Technical Field
The invention relates to a nonmetal static antibacterial/deodorizing/washable multifunctional air filter material and a preparation method thereof, belonging to the field of public environmental protection and sanitation.
Background
With the development of economy, air pollution caused by industrial production and urban life is increasingly serious, and haze has become one of the serious hazards of people's health breathing. The aim of the air purification product is to meet the requirements of people on clean air in living and working environments and serve healthy breathing of people. The core component of the air purification product is an air filter element, and the air filter element material with excellent performance needs to have two functions: 1) Effectively filtering PM2.5 fine particles; 2) Effectively kill pathogenic bacteria, avoid bacteria breeding and produce secondary air pollution.
CN103706182A adopts a ball-wire combined type composite fiber air filter material prepared by electrostatic spinning. Leung found that laminating a microfiber mat on the nanofiber mat surface increased filtration efficiency with a pressure drop less than that of a pure nanofiber mat. Wang et al electro-spun a Polyacrylonitrile (PAN) fiber layer and then covered with polyvinyl alcohol (PVA) nanofibers to form a composite filter material. The filter material filters PM2.5 fine particles in the air and simultaneously detains pathogenic bacteria in the air, and the pathogenic bacteria breeds and breeds in the filter material to cause secondary pollution of the air and harm respiratory health, which is a difficult problem to be solved in the international air purification industry and is also a difficult problem to be solved in the haze prevention health respiratory urgency of China. In order to reduce secondary pollution of air, the air purification product is provided with devices such as ozone sterilization, photocatalyst sterilization, ultraviolet sterilization and the like, wherein ozone and ultraviolet sterilization technologies can possibly harm human bodies to different degrees, the photocatalyst sterilization technology has lower sterilization efficiency, the actual sterilization effect in the air purification product is limited, and the adopted ultraviolet light source also generates ozone, so that the ozone is harmful to human bodies after long-term use. Dust mite allergens are associated with more than 25% of allergies; pollen is small and can float in the air to spread hundreds of miles away; and allergy of pets, etc., are extremely harmful to human health. The autumn and winter season is an excellent period for the transmission of cold viruses.
Therefore, there is a strong need in the market for a filter element material that effectively filters PM2.5 fines, kills bacteria rapidly and is safe, reducing the airborne path of bacteria.
It is internationally accepted that nano silver has better antibacterial activity and can inhibit the growth and reproduction of some fungi, bacteria and viruses. The possible mechanisms are three: firstly, the nano silver has positive charges on the surface and is easy to act with groups with negative charges on the surface of fungus cells, so that the fluidity and permeability of pathogenic fungus cell membranes are changed; secondly, interfering with DNA replication and transcription; thirdly, pathogenic bacteria metabolism is blocked.
Disclosure of Invention
The invention aims to provide a nonmetal static antibacterial/deodorizing/washable multifunctional air filter material which can filter PM2.5 fine particles, pollen and other allergens, kill microorganisms, pathogenic bacteria, drug-resistant bacteria and the like and reduce the air transmission path of bacteria.
Still another object of the present invention is: provides a preparation method of the nonmetal static antibacterial/deodorizing/washable multifunctional air filter material.
The invention aims at realizing the following scheme: a nonmetallic electrostatic antibacterial/deodorant/washable multifunctional air filter material, which is characterized in that: the nano silver colloid antibacterial layer has a protective function, and can effectively kill suppurative cocci represented by escherichia coli, staphylococcus aureus, methicillin-resistant staphylococcus aureus and candida albicans in the air, enteropathogenic bacteria, pathogenic fungi and related drug-resistant bacteria, so that the air transmission path of the bacteria is reduced; the non-metal electrostatic layer has excellent filtering performance and can effectively block PM2.5, visible ash, automobile exhaust, pollen and the like, and the filtering efficiency of particles with the particle diameter of 0.3-10 mu m is more than or equal to 90%.
The invention provides a preparation method of a nonmetal static antibacterial/deodorizing/washable multifunctional air filter material, which is characterized by comprising the following steps:
(1) Firstly, taking a certain amount of polyester Polyol (PBA) and glass fiber, stirring and dehydrating under vacuum at 100 ℃ for 2.5 and h, uniformly stirring, and performing ultrasonic treatment at 100 ℃ for 30 min; adding MDI (polyurethane), stirring rapidly and uniformly, pouring into a mesh silica gel mold preheated at 120 ℃ after the reaction is initiated, and preserving heat for a period of time to obtain a nonmetal polyurethane network filter material frame;
(2) The nano silver antibacterial colloid with the diameter of 5-20nm is coated on the surface of the filter material frame by adopting a physical and chemical curing technology, so that the multifunctional filter material with the composite network structure is formed.
The method for preparing the nonmetallic static antibacterial/deodorizing/washable multifunctional air filter according to claim 2, which is characterized in that the heat preservation in the step (1) is 80-120 ℃ and the heat preservation is 1-3h.
Not only can entrap solid suspended matters, colloid, bacteria and the like in the air, but also can kill microorganisms, pathogenic bacteria and drug-resistant bacteria thereof; meanwhile, the nonmetal frame has excellent filtering performance, and PM2.5, visible ash, automobile exhaust, pollen and the like can be effectively blocked. The multifunctional filter material can be used for fast and efficiently sterilizing, avoiding secondary pollution and efficiently purifying air, and the filter core material can be reused, thereby being beneficial to environmental protection.
The beneficial effects are that:
(1) The polyurethane filter material has the advantages of thin diameter, small pore diameter and large specific surface area, so that the material has lower resistance pressure drop while maintaining high filtering efficiency, thereby meeting the performance requirements of high efficiency and low resistance of the filter material;
(2) The nano silver colloid antibacterial layer provided by the invention can effectively intercept solid suspended matters, colloid, bacteria and the like in the air, can kill microorganisms, pathogenic bacteria, drug-resistant bacteria and the like, and reduces the air transmission path of the bacteria.
Drawings
FIG. 1 is a field emission Scanning Electron Microscope (SEM) image of the multifunctional air filter prepared in example 2.
Detailed Description
The invention is further illustrated by the following examples, which are only intended to provide a better understanding of the invention. Therefore, the illustrated examples do not limit the scope of the invention.
Example 1
A nonmetallic electrostatic antibacterial/deodorizing/washable multifunctional air filter, a nano silver colloid antibacterial layer with a protective function and a nonmetallic electrostatic layer with a blocking function; the preparation method comprises the following steps:
(1) Firstly, taking 50 g of polyester polyol PBA and 10 g of glass fiber, stirring and dehydrating the polyester polyol PBA and the 10 g of glass fiber in vacuum at 100 ℃ for 2.5 h, uniformly stirring the polyester polyol PBA and the 10 g of glass fiber, and performing ultrasonic treatment at 100 ℃ for 30 min; adding 200g of diphenylmethane diisocyanate MDI, rapidly stirring uniformly, pouring into a mesh silica gel mold preheated at 120 ℃ after the reaction initiation, and preserving heat at 80 ℃ for 2 hours to obtain a nonmetal polyurethane network filter frame;
(2) And (3) coating the prepared nano silver antibacterial colloid with the diameter of 5nm on the surface of the filter material frame by adopting a physical curing technology to form a nano silver colloid antibacterial layer, thereby obtaining the multifunctional filter material with the composite network structure.
The obtained multifunctional air filter material has the filter efficiency of 99.99 percent for 0.3-10 mu m particles; for common pathogenic bacteria including but not limited to staphylococcus aureus, escherichia coli, methicillin-resistant staphylococcus aureus, candida albicans and other representative suppurative cocci, the killing rate is 99% in 15 minutes to 1 hour; the ammonia removal rate can reach 85%; after 5 times of cleaning, the ammonia removal rate was 84%.
Example 2
A nonmetallic electrostatic antibacterial/deodorizing/washable multifunctional air filter, a nano silver colloid antibacterial layer with a protective function and a nonmetallic electrostatic layer with a blocking function; the preparation method comprises the following steps:
(1) Firstly, taking 20 g of polyester Polyol (PBA) and 4 g of glass fiber, stirring and dehydrating the mixture in vacuum at 100 ℃ for 2.5 h, uniformly stirring the mixture, and carrying out ultrasonic treatment at 100 ℃ for 30 min; 100 g of MDI is added, after the reaction is initiated by rapid stirring, the mixture is poured into a mesh silica gel mold preheated at 120 ℃, and the mixture is kept at 100 ℃ for 2h to obtain a nonmetal polyurethane filter material frame;
(2) The prepared nano silver antibacterial colloid with the diameter of 20nm is coated on the surface of a filter material frame by adopting a physical curing technology, so that the multifunctional filter material with a composite network structure is formed. The prepared multifunctional air filter material field emission scanning electron microscope is shown in figure 1.
The obtained multifunctional air filter material has the filter efficiency of 95% on 0.3-10 mu m particles; the killing rate of 90% is achieved for common pathogenic bacteria (including but not limited to staphylococcus aureus, escherichia coli and candida albicans) for 15 minutes to 1 hour; the removal rate of ammonia gas can reach 89%; after 5 times of cleaning, the ammonia removal rate was 87%.
Example 3
A nonmetallic electrostatic antibacterial/deodorizing/washable multifunctional air filter, a nano silver colloid antibacterial layer with a protective function and a nonmetallic electrostatic layer with a blocking function; the preparation method comprises the following steps:
(1) Firstly, taking 20 g of polyester Polyol (PBA) and 4 g of glass fiber, stirring and dehydrating the mixture in vacuum at 100 ℃ for 2.5 h, uniformly stirring the mixture, and carrying out ultrasonic treatment at 100 ℃ for 30 min; 100 g of MDI is added, after the reaction is initiated by rapid stirring, the mixture is poured into a mesh silica gel mold preheated at 120 ℃, and the mixture is kept at 120 ℃ for 2h, thus obtaining a nonmetal polyurethane filter frame;
(2) The nano silver antibacterial colloid with the diameter of 5-20nm is coated on the surface of the filter material frame by adopting a physical and chemical curing technology, so that the multifunctional filter material with the composite network structure is formed.
The obtained multifunctional air filter material has the filter efficiency of 98.8 percent for 0.3 to 10 mu m particles; the killing rate of common pathogenic bacteria (including but not limited to staphylococcus aureus, escherichia coli and candida albicans) is 95 percent in 15 minutes to 1 hour; the ammonia removal rate can reach 86%; after 5 times of cleaning, the ammonia removal rate was 84%.
Example 4
A nonmetallic electrostatic antibacterial/deodorizing/washable multifunctional air filter, a nano silver colloid antibacterial layer with a protective function and a nonmetallic electrostatic layer with a blocking function; the preparation method comprises the following steps:
(1) Firstly, taking 50 g polyester Polyol (PBA) and 10 g glass fiber, stirring and dehydrating the 50 PBA and the 10 g glass fiber in vacuum at 100 ℃ for 2.5 h, uniformly stirring the materials, and carrying out ultrasonic treatment at 100 ℃ for 30 min; adding 100 g of MDI (polyurethane), rapidly stirring uniformly, pouring into a mesh silica gel mold preheated at 120 ℃ after the reaction is initiated, preserving heat at 80 ℃ for 2h, preserving heat at 100 ℃ for 2h, preserving heat at 120 ℃ for 2h, and obtaining a nonmetal polyurethane filter material frame;
(2) The nano silver antibacterial colloid with the diameter of 10 nm is coated on the surface of the filter material frame by adopting a physical and chemical curing technology, so that the multifunctional filter material with the composite network structure is formed.
The obtained multifunctional air filter material has the filter efficiency of 99% on 0.3-10 mu m particles; the killing rate of the composition for common pathogenic bacteria (including but not limited to staphylococcus aureus, escherichia coli and candida albicans) is 98% in 15 minutes to 1 hour; the ammonia removal rate can reach 88%; after 5 times of cleaning, the ammonia removal rate was 87%.
Claims (7)
1. A nonmetallic electrostatic antibacterial/deodorant/washable multifunctional air filter material, which is characterized in that: the nano silver colloid antibacterial layer with the protection function effectively kills suppurative cocci represented by escherichia coli, staphylococcus aureus, methicillin-resistant staphylococcus aureus and candida albicans in the air, enteropathogenic bacteria, pathogenic fungi and related drug-resistant bacteria, and reduces the air transmission path of the bacteria; the nonmetallic static layer with the barrier function can effectively block PM2.5, visible ash, automobile exhaust and pollen, and the filtering efficiency of 0.3-10 mu m particles is not lower than 90%.
2. The preparation method of the nonmetal static antibacterial/deodorizing/washable multifunctional air filter material is characterized by comprising the following steps of:
(1) Firstly, taking a certain amount of polyester polyol PBA and glass fiber, stirring and dehydrating in vacuum at 100 ℃ for 2.5 h, uniformly stirring, and carrying out ultrasonic treatment at 100 ℃ for 30 min; adding diphenylmethane diisocyanate MDI, rapidly stirring uniformly, pouring into a mesh silica gel mold preheated at 120 ℃ after the reaction initiation, and preserving the heat for 1-3 hours to obtain a nonmetal polyurethane network filter material frame;
(2) And (3) coating the prepared nano silver antibacterial colloid with the diameter of 5-20nm on the surface of the filter material frame by adopting a physical and chemical curing technology to form a nano silver colloid antibacterial layer, thereby obtaining the multifunctional filter material with the composite network structure.
3. The method for preparing a nonmetallic electrostatic antibacterial/deodorant/washable multifunctional air filter according to claim 2, wherein the heat preservation in the step (1) is 80-120 ℃.
4. A method for preparing a nonmetallic electrostatic antibacterial/deodorant/washable multifunctional air filter according to claim 2 or 3, characterized by the following process:
(1) Firstly, taking 50 g of polyester polyol PBA and 10 g of glass fiber, stirring and dehydrating the polyester polyol PBA and the 10 g of glass fiber in vacuum at 100 ℃ for 2.5 h, uniformly stirring the polyester polyol PBA and the 10 g of glass fiber, and performing ultrasonic treatment at 100 ℃ for 30 min; adding 200g of diphenylmethane diisocyanate MDI, rapidly stirring uniformly, pouring into a mesh silica gel mold preheated at 120 ℃ after the reaction initiation, and preserving heat at 80 ℃ for 2 hours to obtain a nonmetal polyurethane network filter frame;
(2) And (3) coating the prepared nano silver antibacterial colloid with the diameter of 5nm on the surface of the filter material frame by adopting a physical curing technology to form a nano silver colloid antibacterial layer, thereby obtaining the multifunctional filter material with the composite network structure.
5. A method for preparing a nonmetallic electrostatic antibacterial/deodorant/washable multifunctional air filter according to claim 2 or 3, characterized by the following process:
(1) Firstly, taking 20 g of polyester Polyol (PBA) and 4 g of glass fiber, stirring and dehydrating the mixture in vacuum at 100 ℃ for 2.5 h, uniformly stirring the mixture, and carrying out ultrasonic treatment at 100 ℃ for 30 min; 100 g of MDI is added, after the reaction is initiated by rapid stirring, the mixture is poured into a mesh silica gel mold preheated at 120 ℃, and the mixture is kept at 100 ℃ for 2h to obtain a nonmetal polyurethane filter material frame;
(2) The prepared nano silver antibacterial colloid with the diameter of 20nm is coated on the surface of a filter material frame by adopting a physical curing technology, so that the multifunctional filter material with a composite network structure is formed.
6. A method for preparing a nonmetallic electrostatic antibacterial/deodorant/washable multifunctional air filter according to claim 2 or 3, characterized by the following process:
(1) Firstly, taking 20 g of polyester Polyol (PBA) and 4 g of glass fiber, stirring and dehydrating the mixture in vacuum at 100 ℃ for 2.5 h, uniformly stirring the mixture, and carrying out ultrasonic treatment at 100 ℃ for 30 min; 100 g of MDI is added, after the reaction is initiated by rapid stirring, the mixture is poured into a mesh silica gel mold preheated at 120 ℃, and the mixture is kept at 120 ℃ for 2h, thus obtaining a nonmetal polyurethane filter frame;
(2) The nano silver antibacterial colloid with the diameter of 5-20nm is coated on the surface of the filter material frame by adopting a physical and chemical curing technology, so that the multifunctional filter material with the composite network structure is formed.
7. A method for preparing a nonmetallic electrostatic antibacterial/deodorant/washable multifunctional air filter according to claim 2 or 3, characterized by the following process:
(1) Firstly, taking 50 g polyester Polyol (PBA) and 10 g glass fiber, stirring and dehydrating the 50 PBA and the 10 g glass fiber in vacuum at 100 ℃ for 2.5 h, uniformly stirring the materials, and carrying out ultrasonic treatment at 100 ℃ for 30 min; adding 100 g of MDI (polyurethane), rapidly stirring uniformly, pouring into a mesh silica gel mold preheated at 120 ℃ after the reaction is initiated, preserving heat at 80 ℃ for 2h, preserving heat at 100 ℃ for 2h, preserving heat at 120 ℃ for 2h, and obtaining a nonmetal polyurethane filter material frame;
(2) The nano silver antibacterial colloid with the diameter of 10 nm is coated on the surface of the filter material frame by adopting a physical and chemical curing technology, so that the multifunctional filter material with the composite network structure is formed.
The obtained multifunctional air filter material has the filter efficiency of 99% on 0.3-10 mu m particles; the killing rate of the composition for common pathogenic bacteria (including but not limited to staphylococcus aureus, escherichia coli and candida albicans) is 98% in 15 minutes to 1 hour; the ammonia removal rate can reach 88%; after 5 times of cleaning, the ammonia removal rate was 87%.
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