KR101321493B1 - Air filter which having superior effective to filtration of super fine particle and sterilization - Google Patents

Abstract

The present invention relates to an air filter having excellent ultrafine particle filtration and sterilization effect. More particularly, when a positively charged substance, a catalyst, and an adsorbent are coated on the surface of the filter cloth, the ultrafine particles contaminated with bacteria and contaminated with bacteria are treated by the potentiometric method. Easily adheres to the air and contaminates the ultra-fine particles in the air while overcoming the disadvantages of eliminating bacteria by the catalyst and the adsorbent and easily adsorbing environmentally harmful substances such as volatile organic compounds. It relates to an air filter that can easily absorb sterilized bacteria and environmentally harmful substances.

Description

Air filter which having superior effective to filtration of super fine particle and sterilization}

The present invention relates to an air filter having excellent ultrafine particle filtration and sterilization effect. More particularly, when a positively charged substance, a catalyst, and an adsorbent are coated on the surface of the filter cloth, the ultrafine particles contaminated with bacteria and contaminated with bacteria are treated by the potentiometric method. Easily adheres to the microparticles in the air while overcoming the disadvantages of filtering microparticles than conventional filter media pores by eliminating bacteria and easily adsorbing environmentally harmful substances such as volatile organic compounds. It relates to an air filter that can easily absorb contaminated bacteria and adsorb harmful substances.

With the development of the industry, the pollution level of the residential area is getting worse due to the industrial zone, urbanization and the rapid dissemination of automobiles. Furthermore, the pollution is accelerated from fine dust to the entire area from the yellow dust from China. Such fine dust is a reality in which respiratory and skin-related diseases such as colds, microbronchiitis and atopic dermatitis are frequently occurring.

Accordingly, various air purifiers for purifying air are rapidly spreading in various large buildings, industrial sites, and general homes.

However, conventional air purifiers simply filter out harmful substances in the air such as fine dust and dust, and do not remove various odors in the air or sterilize the air. There was a problem, and accordingly, it is common to take a form in which an ozone generator, a hepa filter, etc., which have bactericidal power and odor removal effect, are additionally combined.

A filter is defined as a thin film that filters foreign matter such as suspended matter contained in a liquid or foreign matter of fine dust in a gas.

In general, it can be divided into electric dust collection type and dry and wet filter type by removing dust. The electric dust collection method gives the dust in the air a polarity so that the dust is attracted to the dust collecting plate as if the magnet is pulling the different poles, so the inside is simple and the noise is low. There is a large amount, and there is an advantage that the filter does not need to be replaced, but the dust collecting plate that collects dust needs to be periodically cleaned and has the disadvantage of having a dust collecting effect when the power is supplied.

The dry hepa filter type filters out dust in the air like a filter paper using a cloth or paper with a small hole. The filter type can be classified in the order of Pre-FilterMedium Filter HEPAULPA according to how small dust can be filtered out, and ULPA filters the smallest dust. This filter type has been used in clean rooms in factories, hospitals and laboratories that make semiconductors, but has recently been used in air cleaners. Filters such as HEPA and ULPA filter out very fine dust and are often used in places where clean air is needed.However, as with most air cleaners, if the filter is not replaced or cleaned in a timely manner, bacteria or mold may grow in the filter and clean air. Filters that need to be made will also spread contaminated air into the room. In addition, the HEPA or ULPA filter requires a large amount of power required for the air passing through the air is very small because the hole through the air is very small, there is a disadvantage that the noise can be increased.

Wet filter type sprays liquid such as water into small vapor as if spraying with sprayer, and the water droplets combine with the dust to remove the dust or absorb the liquid such as water through the filter to remove dust by contact with air and water. As a method of removal, it should be noted that the efficiency decreases when used in a place where the air speed is high, and such a wet filter has a characteristic of removing soluble (water-soluble) harmful gas well and having humidification effect. .

Until now, the general filter has not been able to filter ultra-fine particles smaller than the pores formed in the filter body, and thus the effectiveness of the filter is evaluated to be low. In the case of HEPA or ULPA filters, fine particles can be filtered, but a vacuum device is required. In addition, a lot of power is required, and generally has a disadvantage of high noise. In particular, while removing the discomfort during the breathing process from the yellow dust of the ultra-fine particles in the early winter or spring of Korea, while the need for a filter (mask) to protect the respiratory system of the human body, it is highly efficient to remove the yellow dust of micro particles contaminated with bacteria and heavy metals At the same time how to eradicate bacteria is very poor situation.

As described above, in order to efficiently process ultra-fine particles floating in the air and to remove bacteria, Korean Patent Publication No. 2006-0102871 discloses a blower for sucking outside air and purifying the air discharged through the same. The present invention relates to a device for supplying clean air and ventilating a room through a distribution plate after passing through a purification device consisting of a first prefilter, a second HEPA filter, a third adsorption filter, and a fourth sterilization filter. Carbon monoxide, carbon dioxide, etc., which are difficult to remove with an air purifier, are easily removed, and even if the maintenance is insufficient, the deterioration of air quality is suggested.

In addition, Korean Patent Laid-Open Publication No. 2006-0056080 proposes an air sterilization and purification apparatus for sterilizing and purifying polluted air using a cyclone-type fluid flow and an ultraviolet light source and sterilizing power by a photocatalyst material. 1999-0023143 proposes an antibacterial filter prepared by dissolving chitosan in an aqueous acid solution to prepare a chitosan solution, immersing the filter in the chitosan solution to adsorb the chitosan, and drying the chitosan treated filter. In 2006-0059397, a catalyst supporting filter in which a medium / low temperature catalyst is supported on a filter medium and a method of manufacturing the same are proposed to filter dust and remove contaminants caused by nitrogen oxides.

In the above-mentioned Korean Patent Laid-Open Publication No. 2006-0102871, the external air forcibly sucked through the air is blown through the primary and secondary dust filters to fine particles of PM 10 or less (particulate matter or less). It is removed to the upper substance, the organic compound or odorous substance is adsorbed by activated carbon filter, and sterilized by silver (Ag) coated on the sterilization filter. However, it is difficult to remove ultra-fine particles smaller than the air gap of the dust collecting filter medium, and the air gap of the secondary HEPA filter is small, so that if the air gap is filled with a small amount of particulate matter, the suction load of the external air is greatly increased. In addition, it can be explained that there is a problem that the selective dust collecting filter should be regularly managed.

In addition, in the above-mentioned Korean Patent Publication No. 2006-0056080, it is possible to sufficiently filter contaminated air using various filters to obtain clean air, and also to use bacteria and sterilizing substances and / or by using a cyclone-type fluid flow. There may be an advantageous effect of increasing the contact time of the ultraviolet light source to efficiently sterilize and clean the contaminated air. However, there is a drawback in that it can be used in a general home or office due to the high economic demands for installing the cyclone device, and does not provide a method for simultaneously removing particulate matter and sterilization.

In the above-mentioned Korean Patent Publication No. 1999-0023143, it has been reported that chitosan has an antimicrobial effect in academia so far, but it can be explained that the antimicrobial effect is insignificant and the sterilization effect is virtually insignificant. While the present invention simply proposed a method for preparing a filter using chitosan composed of natural polymers to provide antimicrobial activity to the present invention, the present invention provides a potential difference between ultrafine particles having a negative charge by the constituents of the filter. By using not only the technical mechanism that can be filtered even if smaller than the pore of the filter, but also cited invention and technical idea and technical configuration can be completely different as the technical configuration is proposed as other catalysts and adsorbents.

In addition, in the above-mentioned Korean Patent Publication No. 2006-0059397, dust can be removed by a filter medium, and a medium / low temperature catalyst can purify the environmentally harmful substances in the air, but fine particles smaller than the pores of the filter medium Not only is it unlikely to filter, but it must be heated to remove polluted substances in the air by the catalyst coated on the filter medium, which requires a power source.

Accordingly, the present inventors have made a lot of efforts to easily remove the ultra-fine particles smaller than the pores of the filter media with a conventional filter, and to develop a filter media with excellent sterilization effect, resulting in surface modification of positive charges using the potentiometric method and contamination with bacteria. By coating the catalyst coating of metal or metal oxides to sterilize the ultrafine particles and the adsorbent for adsorbing organic compounds, it is possible to collect fine dust or dust smaller than the filter media pores as the magnets pull different poles by the potentiometric method. It can be easily attached and filtered, the micro-contaminated bacteria can be eradicated by the catalyst, and the volatile organic compounds or formaldehyde, which are environmentally harmful substances contaminated in the air by the adsorbent, can be easily removed. To complete.

Accordingly, the present invention minimizes the suction force during the filtering process to purify the air, while saving energy and greatly reducing the load of the suction device, while maximizing the filtration rate of the fine dust or yellow dust of ultra-fine particles which are much smaller than the filter media. The aim of the present invention is to provide an air filter that can overcome both bacterial infection and environmentally harmful pollutants.

The present invention is a filter in which a positive charge material, a catalyst and an adsorbent are coated on a filter medium, and a positive charge material is coated on the filter medium in order to easily attach ultrafiltration negatively charged and contaminated with bacteria by air in a potential difference method. Coated catalyst of metal or metal oxide in order to eradicate contaminated bacteria from ultrafine particles attached and filtered by filtration, and an adsorbent for removing environmentally harmful substances of volatile organic compounds or formaldehyde. Air filter that can remove bacteria infection and environmental pollutant at the same time while maximizing filtration rate of dust or yellow dust.

As described above, the fine dust or dust of the particles smaller than the conventional filter media pores cannot be filtered, so that the fine particles and dust contaminated with ultra-fine particles or bacteria, and environmentally harmful substances contaminated in the air, While it could cause bacterial infection and carcinogenesis, the filter media coated with positive charge material, catalyst, and adsorbent are easily attached to the filter media of the present invention even if the ultrafine particles are much smaller than the pores of the filter media. It is easy to effectively remove the fine dust or dust contaminated in the air while minimizing the suction force during the filtering process, and at the same time, it provides the removal of bacteria contaminated with fine dust or dust and adsorption of environmentally contaminated substances contaminated in the air. Great for overcoming the causes of respiratory diseases, bacterial infections and carcinogenesis from the atmosphere There is an advantage.

1 is a result of a transmission electron microscope (Transmission Electron Microscopy) of the silver nano solution prepared for the antimicrobial catalyst of the embodiment.

The filter media serves to remove fine dust or dust, and serves as a carrier for coating positively charged materials, catalysts and adsorbents, filter media of various materials can be used, and various types of woven or nonwoven fabrics. Shaped filter media can be applied here, and can be used for the use of masks, gas masks, air purification systems, air conditioners, insect screens and filtration nets using the mechanism of the present invention.

Filter materials are generally polyethylene naphthalate, polyester, polypropylene, polystyrene, polyethylene, polypropylene, polyvinyl chloride, ethylene vinyl acetate, polyethylene terephthalate, polycarbonate, polybutylene terephthalate, polyacetal and polyamide, etc. Any one or more materials selected from the group consisting of may be used, and when used in a high temperature region, at least one selected from the group consisting of high temperature ceramic fibers, specifically glass fibers, ceramic fibers and silica glass fibers Can be used.

The positive charge material may be used alone or mixed with a material of chitosan or quaternary ammonium salt.

Chitosan, a positively charged substance used in the present invention, may be a substance obtained by deacetylating chitin contained in crabs, crayfish, and shrimp shells in a range of 60% or more, preferably 65 to 98%. At this time, the molecular weight of the chitosan is preferably in the range of 10,000 to 250,000, preferably in the range of 10,000 to 100,000, more preferably in the range of 30,000 to 70,000. If the molecular weight is less than 10,000, not only the adhesion is insufficient when coating the filter media, but also the potential of positive charges is lowered, so that the adhesion filtration rate of negatively charged fine dust or dust may drop, and when the molecular weight exceeds 250,000, it is dissolved in a solvent. It is advantageous to maintain the above range because a problem occurs that the efficiency of workability decreases due to viscosity swelling during the process.

Chitosan coating for providing a positive charge to the filter medium according to the present invention is a filter having a positive charge property on the surface of the filter medium by dissolving the chitosan in a solvent, coating the surface by depositing the filter medium and then drying the solvent To prepare.

The solvent may be an acid such as an organic acid or an inorganic acid. Specifically, lactic acid, citric acid, acetic acid, sulfuric acid, hydrochloric acid, nitric acid, and the like may be used. At this time, it is advantageous to use sulfuric acid, lactic acid and citric acid to prevent odor discomfort or respiratory disease when depositing the filter medium for the positive charge, and acetic acid is used to prevent environmental pollution by by-products after coating It is more preferable.

Chitosan dissolved in the solvent is dissolved to a saturated solution in order to minimize economical and environmental pollution, it is advantageous to use diluted with water as needed.

Quaternary ammonium-based positive charge material used in the present invention is choline (Choline); Carnitine; Benzalkonium chloride; Denatonium; Cetrimonium bromide; Diallyldimethyl ammonium chloride; 3-chloro-2-hydroxypropyltrimethylammonium chloride (CHPTAC); Copolymers of acrylamide and quaternized dimethylammoniumethyl methacrylate (Copolymer of acrylamide and quaternized dimethylammoniumethyl methacrylate); Diallyldimethylammonium chloride (Poly (diallyldimethylammonium chloride)); Copolymers of acrylamide and diallyldimethylammonium chloride; Quaternized hydroxyethyl cellulose; Copolymers of vinylpyrrolidone and quaternized dimethylaminoethyl methacrylate (Copolymer of vinylpyrrolidone and Quaternized dimethylaminoethyl methacrylate); Copolymers of vinylpyrrolidone and quaternized vinylimidazoles; Copolymers of acrylic acid and diallyldimethylammonium chloride (Copolymer of Acrylic Acid and Diallyldimethylammonium Chloride); Copolymers of vinylpyrrolidone and methacrylamidopropyltrimethylammonium (Copolymer of vinylpyrrolidone and methacrylamidopropyl trimethylammonium); Poly (acrylamide 2-methacryloxyethyl ammonium chloride) Poly (acrylamide 2-methacryloxyethyltrimethyl ammonium chloride); Terpolymer of Acrylic Acid, Acrylamide and Diallyldimethylammonium Chloride; Terpolymer of vinylcaprolactam, vinylpyrrolidone, and quaternized vinylimidazole); vinylcaprolactam, vinylpyrrolidone and quaternized vinylimidazole; And terpolymer of Acrylic Acid, Methacrylamidopropyl Trimethyl Ammonium Chloride, and Methyl Acrylate are selected from the group consisting of acrylic acid, methacrylamidopropyltrimethylammonium and methyl acrylate. The coating of the quaternary ammonium-based material to provide a positive charge to the filter medium according to the present invention is dissolved in the selected quaternary ammonium in water (including distilled water), and then the surface of the filter medium by depositing the filter media and then drying A filter having a positive charge property is prepared on the surface of the filter medium.

Chitosan and quaternary ammonium salts to provide positive charges are advantageously coated with 0.05 to 2.5 parts by weight, preferably 0.15 to 1.0 parts by weight, more preferably 0.25 to 0.75 parts by weight, based on 100 parts by weight of the filter medium. Do. If the amount is less than 0.05 parts by weight, the amount of positive charges on the surface of the filter medium is small, so that it is difficult to adsorb and filter fine particles or dusts having negative charges in the air, and when it exceeds 2.5 parts by weight, it is difficult to provide positive charges. As it fills the air gap of the filter medium, more suction force is required during the filter process, and a coating process for providing positive charges of chitosan and quaternary ammonium-based requires a problem that can cause loss of competitiveness. It is preferable to coat the concentration as well.

When the chitosan and quaternary ammonium-based materials prepared as described above are coated on the surface of the filter medium and provide a positive charge, even if the ultrafine particles are much smaller than the pores of the filter medium, they are easily attached as in the principle of magnets, thereby minimizing suction force during the filtering process. It is easy to effectively remove the fine dust or dust contaminated in the air.

The adsorbent for removing the environmentally harmful substances of the volatile organic compounds or formaldehyde is not particularly limited as long as the adsorption power of environmentally harmful substances contaminated in the air is not limited, and activated carbon or activated carbon fibers, zeolites, cyclodextrins, silicates, actives One or more powders or granules selected from alumina, apatite hydroxide, apatite carbonate, calcium monophosphate and calcium triphosphate may be used.

For example, activated carbon or activated carbon fibers may be advantageously used for solvent recovery, odor removal, and gas purification, and zeolite may be advantageously used for humidity control, antibacterial, resin addition, deodorization, and catalyst. In the case of cyclodextrin, it is advantageous to use it as a deodorant for removing odor, silicate is advantageous for removing contaminated impurities and water in the air, and activated alumina is a volatile organic compound using high specific surface activity. Calcium phosphate-based apatite, apatite, calcium monophosphate, and calcium triphosphate are beneficial for the removal of proteins and various infectious diseases such as viruses and automobiles. It is advantageous for adsorption applications such as nitrogen oxide contained in the gas.

The adsorbent consists of a size from 20 μm to 2.0 mm, more preferably from 50 μm to 1.0 mm, most preferably from 100 μm to 500 μm. If the particle size of the adsorbent is less than 20 ㎛, it is convenient to coat on thin filter media like a mask. In general, it is uniformly distributed on the filter media to increase the adsorption power of environmentally harmful substances contaminated in the air. Due to the large load during the suction process to prevent the filter, the power consumption is large, which shortens the life of equipment such as an air cleaner. When the particle size is larger than 2.0 mm, it is preferable to maintain the size of the adsorbent, because the permeability of air is increased during the suction process for the filter, but the filtering and adsorption effect is poor.

The adsorbent may be used by applying in the range of 0.5 to 20 parts by weight to 100 parts by weight of the filter medium, preferably 2.0 to 15 parts by weight, more preferably 5.0 to 13 parts by weight, most preferably 7.5 to 10 parts by weight. use. If the coating amount is less than 0.5 parts by weight, there is a disadvantage that it can not be used for a long time because the physical adsorption amount of the adsorbent is small. In addition, if the coating amount of the adsorbent is more than 20 parts by weight, it can be used for a long time, but when applied to a fluid filter medium such as a mask has a disadvantage in that it is separated from the filter medium in a short time, so the adsorbent in the amount proposed above It is preferable to coat.

The catalyst is magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), potassium (K), phosphorus (P), yttrium (Y), molybdenum (Mo), bismuth (Bi), Telenium (Te), titanium (Ti), manganese (Mn), iron (Fe), cobalt (Co), rhodium (Rh), iridium (Ir), nickel (Ni), palladium (Pd), platinum (Pt) One or two or more metals selected from among copper (Cu), silver (Ag), gold (Au), zinc (Zn), and aluminum (Al) or oxides thereof may be used. It is composed of a controlled phase and a controlling phase, and has a dual structure in which a part of the controlled phase is exposed to the surface. As a result, the electron transfer between the controlled phase and the controlled phase smoothly increases the synergy effect. It can be, thereby increasing the antimicrobial effect.

The particle size of the metal or metal oxide used as the catalyst is 10 nm ~ 5 ㎛, preferably coated with 0.1 ~ 5.0 g / ㎠ compared to the surface area of the filter medium. In addition, the amount of the catalyst may vary depending on the activity or unit cost of each selected metal or metal oxide, and based on 100 parts by weight of the filter media, 0.001 to 0.25 parts by weight may be added, more preferably 0.035 to 0.15 weight. Addition is advantageous, most preferably 0.05 to 0.1 parts by weight. When the selected catalyst is added in an amount of 0.001 parts by weight or less, the probability of killing the microorganism, bacteria or virus attached to the filter medium when the filter of the present invention is attached to the mouth and then inhaled is added. The antimicrobial effect of the catalyst can be very high, but in general, since the components made of the catalyst are very expensive, there is a problem in that the economic efficiency can be greatly reduced, it is preferable to add and use the proposed concentration.

The activated carbon is attached to the filter media by a binder, and there is no particular limitation, and the type of the activated carbon is irrelevant unless it impairs the adsorption power of the catalyst and activated carbon during the process of attaching to the filter media.

For example, water-soluble binders include starch, cellulose or derivatives thereof, alginic acid, gelatin, polyvinyl alcohol (PVA), and water-dispersible binders include water-dispersible acrylic resins or derivatives thereof and water-dispersible vinyl acetate resins. Chromman indene resin, terpene resin, terpene phenol resin, aromatic hydrocarbon modified terpene resin, terpene hydrogenated resin, terpene phenol hydrogenated resin, rosin resin, hydrogenated rosin ester resin, rosin modified phenol Binders with adhesiveness of natural resins such as resins and alkylphenol resins, alkylphenol acetylene resins, alkylphenol formaldehyde resins, styrene resins, aliphatic petroleum resins, cycloaliphatic petroleum resins, copolymerized petroleum resins Binders having adhesiveness of synthetic resins such as aromatic petroleum resins, xylene resins, and xylene formaldehyde resins; It is preferable to use it as a binder, such as oligomer-type tackifiers, such as polybutene and a liquid rubber | gum, and the water-soluble binder which is excellent in processability and excellent in processability is the most favorable among these.

The binder is preferably 0.1 to 10 parts by weight based on 100 parts by weight of the adsorbent. If it is less than 0.1 parts by weight, there is a disadvantage in that the binding is insufficient due to insufficient durability, and if it exceeds 10 parts by weight, a blocking phenomenon occurs during the process of attaching to the filter medium, so that the binder in the above concentration range is included. desirable.

Hereinafter, the present invention will be described in more detail with reference to the following examples, which are not intended to limit the present invention.

[Example]

Example 1 Filter Media Coated with Chitosan

2 g of chitosan solution capable of providing positive charge by measuring 2 g of Kumho Chemical's chitosan (MW: 120,000) in a 250 ml beaker and supplying 10 ml of acetic acid and 90 ml of distilled water to it. Was prepared. Next, a non-woven filter medium having a diameter of 10 cm was prepared, immersed in a dissolved 2% by weight of chitosan solution and completely dried by a dry oven to filter 0.1% by weight of chitosan inside the nonwoven filter medium to provide a positive charge. Was prepared.

Example 2 Benzalkonium Chloride Coated Filter Media

Prepare four 250 ml beakers, weigh exactly 2 g of Benzalkonium chloride from Sigma, supply distilled water to the remaining 100 g, and dissolve. A solution of a quaternary ammonium system was prepared, respectively. Next, a nonwoven filter medium having a diameter of 10 cm was prepared, and each was immersed in the dissolved 2 wt% positive charge material, and then completely dried by a dry oven to coat 0.1 wt% benzalkonium chloride inside the nonwoven filter medium to provide a positive charge. A filter medium was prepared.

Example 3 Dinatonium Coated Filter Media

Dinatonium was used in the same manner as in Example 2 to prepare a filter medium that is coated inside the nonwoven filter medium to provide a positive charge.

Example 4 Filter Material Coated with Diallyldimethyl Ammonium Chloride

A filter media providing positive charges was prepared by coating the inside of the nonwoven filter media in the same manner as in Example 2 using diallyldimethyl ammonium chloride.

Example 5 Filter Material Coated with Diallyldimethyl Ammonium Chloride Polymer

Using a diallyl dimethyl ammonium chloride polymer (MW: 25,000) was prepared in the same manner as in Example 2 to filter the inside of the non-woven filter media to provide a positive charge.

Example 6 Filter Media Containing a Silver Nano Catalyst

1.5748 g of silver nitrate (AgNO ₃ ) from Junsei was precisely weighed, transferred to a 1 liter beaker, and then diluted with 800 ml of distilled water to dissolve silver nitrate by a stirrer. In another 200 ml container, 1 mole of sodium borohydride was weighed per 1 mole of silver nitrate, 100 ml of distilled water was added, and then completely dissolved by a stirrer to prepare a reducing agent solution.

A solution containing silver nitrate was slowly added dropwise while stirring the solution containing silver nitrate at a speed of 1,000 rpm to prepare a 1,000 ppm silver nano solution (FIG. 1) having an average size of 15 nm. The nonwoven fabric was immersed in a 1,000 ppm silver nano solution, it was completely dried in an oven at 100 ℃ to prepare a filter medium containing a silver nano catalyst.

Example 7 Filter Media Containing a Copper Catalyst

38.01 g of copper nitrate (Cu (NO ₃ ) ₂ H ₂ O) was weighed and transferred to a 1 L beaker, distilled water was supplied, and the mixture was stirred slowly to completely dissolve copper nitrate. In another container, one mole of copper nitrate was weighed with at least one mole of hydrazine hydrate (N ₂ H ₄ H ₂ O) as a reducing agent, and the copper powder was added by dropwise adding a reducing agent while stirring the solution containing copper nitrate at a speed of 1,000 rpm. Filtration and washing were carried out five times to remove excess hydrazine hydrate and by-product nitrate, and then completely dried to obtain 10 g of copper powder having an average size of 0.1 g. 50 ml were fed, 0.5 g of polyvinyl alcohol was added thereto, followed by complete dissolution. The solution was soaked in a nonwoven fabric and completely dried in an oven at 100 ° C. to include a copper catalyst. Prepared filter media.

Example 8 Filter Media Containing Mixed Oxide Catalysts

2.33 g of Fe (NO ₃ ) ₃ · 9H ₂ O, 4.92 g of Ni (NO ₃ ) ₃ · 6H ₂ O, and 0.3 g of Bi (NO ₃ ) ₃ · 5H ₂ O were dissolved in 20 ml of 10% HNO ₃ , and dissolved. Made C Dissolve 3.64 g of (NH ₄ ) ₆ Mo ₇ O ₂₄ 4H ₂ O with water, add 0.071 g of 85% H ₃ PO ₄ and 12.2 g of 40% silica sol with stirring, mix thoroughly and uniformly, and then add Solution C. Was added. The mixed solution was adjusted to pH 3 with ammonia water, and the solvent was evaporated by heating on a hot plate, dried in an oven at 140 ° C., calcined in air from 200 ° C. to 575 ° C., and then ground to 25 to 70 mesh. The catalyst to be controlled represented by 50% MoFe _0.28 Ni _0.82 Bi _0.01 P _0.01 O _{x + y} + 50% SiO ₂ was prepared by the above slurry method. Here, 0.2 ml of Ni (NO ₃ ) ₃ · 6H ₂ O (0.150 g / ml in H ₂ O), 0.3 ml of Bi (NO ₃ ) ₃ · 5H ₂ O (0.250 g / ml in 10% HNO ₃ ) by adding Te (OH) to _{6 (0.118 g / ml in H} 2 O) to _{0.1ml, H 3 PO 4 (0.0508} g / ml in H 2 O) 0.3 ml each by re-processed in the same firing conditions as described above A mixed oxide catalyst having a control phase and a control phase represented by [Bi _0.03 P _0.03 Ni _0.02 Te _0.01 O _x ] [50% Bi _0.01 P _0.01 MoFe _0.28 Ni _0.82 O _y + 50% SiO ₂ ] Prepared. 50 ml of distilled water was supplied to the prepared mixed oxide catalyst, 0.5 g of polyvinyl alcohol was added thereto, followed by complete dissolution. The resultant was soaked in a nonwoven fabric and completely dried in an oven at 100 ° C. to filter medium containing the mixed oxide catalyst. Was prepared.

Example 9 Filter Media Containing Activated Carbon, Silver Nano and Chitosan

A filter media by cutting the nonwoven fabric into a size of 5 × 5 × 1 cm, and the absorbent Co. The silver produced by the activated carbon of Hanil Green Tech in the Example 6 20% by weight relative to the weight of the nonwoven fabric, a sterilization catalyst Was coated with 0.5 wt% of the nonwoven fabric, and then 2.5 wt% of chitosan (from Sowa Chemical, molecular weight 36,000, acetylation of chitin: 80%) was added to the nonwoven fabric to provide a positive charge. Filter media were prepared by coating%. At this time, the specific surface area of the activated carbon used as the adsorbent was 950 m ² / g, respectively, and the silver nano particles showed an average size of 15 nm.

Example 10 Filter Media Containing Activated Carbon Fiber, Silver Nano and Chitosan

The same procedure as in Example 9 was carried out except that activated carbon fibers were used as the adsorbent. The specific surface area of the activated carbon fibers used at this time was 1,450 m ² / g.

Example 11. Mouth mask filter media

Purchasing a mouse mask (Mouth mask) from the drugstore as a filter medium, 15% by weight based on the weight of the non-woven fabric of the cyclodextrin Co., Ltd. as an adsorbent inside the mask, the silver nano-manufactured by Example 3 as a sterile catalyst Was coated with 0.1% by weight of the nonwoven fabric, and then 3.5% by weight of chitosan (Sowa Chemical, molecular weight 36,000, degree of acetylation of chitin: 80%) in acetic acid solvent to provide a positive charge. Coating the% to prepare a portable mask filter media.

Comparative Example 1. Uncoated filter media

A non-woven filter medium having a diameter of 10 cm that was not coated was prepared.

Comparative Example 2. General Mouse Mask

As a filter medium, a portable mask in which a mouse mask was purchased at a pharmacy was prepared.

Test Example 1 Measurement of Residual Amount and Filtration Rate

Accurately weigh 2 grams of carbon black (trade name: Printex V-2) provided by Degusa Korea and place it inside an acrylic chamber of 1 × 1 × 1 m, and blow the air of a small fan to scatter carbon black powder. The filter media of Example 1-5 and Comparative Example 1 were filtered under reduced pressure at the outlet of the chamber to check the residual amount of carbon black powder remaining in the filter media, and the filtration rate is shown in Table 1 below.

division Carbon black remaining amount (g) Filtration rate (%) Example 1 1.68 84 Example 2 1.82 91 Example 3 1.75 88 Example 4 1.88 94 Example 5 1.78 89 Comparative Example 1 0.26 13

As shown in Table 1, Comparative Example 1, which was not treated with any filter media, had a filtration rate of only 13% of the ultrafine carbon black powder, but a material capable of providing a positive charge to the filter media as in Example 1-5. When coated with a high filtration rate of more than 84%. This confirmed that when the positively charged material is coated on the surface of the filter medium, ultrafine particles having negative charge like iron adhere to the magnet can maximize the filtration rate when passing through the filter medium having a large pore due to the reduced pressure.

Test Example 2 Antibacterial Activity Test

The results of the antimicrobial test carried out for Example 6-8 and Comparative Example 1 are shown in Table 2 below, the samples used in the antimicrobial evaluation test was 1 g each, the size was 10 × 10 × 1 mm, antimicrobial evaluation The test was carried out using E. coli ATCC 25922 and Staphylococcus aureus ATCC 6538 according to the bacteriometry (KS K 0693), and the sample was placed in a flask for 24 hours.

Sample classification Escherichia coli Staphylococcus Initial number of bacteria
(Mari) Test bacteria
(Mari) Reduction rate
(%) Initial number of bacteria
(Mari) Test bacteria
(Mari) Reduction rate
(%) Example 6 1 x 10 ⁷ 0 100 1.9 × 10 ⁷ 0 100 Example 7 1 x 10 ⁷ 0 100 1.9 × 10 ⁷ 1.5 x 10 ⁴ 99 Example 8 1 x 10 ⁷ 0 100 1.9 × 10 ⁷ 1.3 x 10 ³ 99 Comparative Example 1 1 x 10 ⁷ 1.8 × 10 ⁹ More increase 2.5 x 10 ⁷ 1.9 × 10 ⁸ More increase

As shown in Table 2, it was found that the silver nano and copper catalysts and mixed oxide catalysts according to the present invention had excellent antibacterial activity.

Test Example 3 Measurement of Removal Rate of Volatile Organic Compounds in Filter Media

In order to confirm the adhesion of fine dust and the adsorption efficiency of environmentally harmful substances by the mechanism of the present invention, carbon used by Degu Co., Ltd. is scattered by a continuous vibration and blowing method in a 3 × 6 m container box, Toluene, benzene, and formaldehyde of Duksan Co., Ltd. of Aldrich were uniformly scattered inside the container box by a heating and blowing method.

At the top of the container box, a suction device and the filter media prepared according to Examples 9, 10 and Comparative Example 1 were installed, and carbon black was attached to the filter media during the suction process, and the weight increase was measured. Toluene and benzene were measured. It was measured using a gas chromatography (GC) analysis equipment, formaldehyde is shown in Table 3 measured by the KS K0611 method.

Analysis item
Sample classification Carbon black
Removal rate (%) toluene
Removal rate (%) benzene
Removal rate (%) Formaldehyde
Removal rate (%) Example 9 98.6 96.4 95.9 87.6 Example 10 97.8 99.8 99.8 94.4 Comparative Example 1 6.64 0.22 0.20 0.10

As shown in Table 3, when the natural polymer of chitosan having a positive charge is coated on the nonwoven fabric, fine carbon black having a negative charge much smaller than the voids of the nonwoven fabric can be easily attached by the mechanism of the present invention according to the principle of the magnet. It was confirmed. In addition, the adsorption power of volatile organic compounds, toluene and benzene, and environmentally harmful formaldehyde, was very high in activated carbon or activated carbon fibers having high specific surface area and lipophilic properties.

Test Example 4. Odor sensory test using a mouse mask

Using the odor generated in the landfill as a target material, Example 11 and Comparative Example 2 were shown in Table 4 to confirm the deodorizing efficiency by the sensory method.

Test Items
Sample classification Deodorization Efficiency Example 10 ● Comparative Example 2 ▽ ●: Very good, ○: Excellent, ■: Normal ▽: Low, ▼: Very low

A total of 26 participants (19 males and 7 females) participated in the sensory method, and their average age was 33.4 years.

As shown in Table 4, when a commercially available mask includes a cyclodextrin having a ring structure, odor-producing substances are trapped in the ring structure of the cyclodextrin to overcome problems from odor during the breathing process. It was confirmed that there is.

Claims (9)

In the filter media,
Iii) quaternary ammonium-based positively charged material, or
Ii) at least one positive charge selected from the group consisting of chitosan and quaternary ammonium; And
Yttrium (Y), Molybdenum (Mo), Bismuth (Bi), Telenium (Te), Manganese (Mn), Cobalt (Co), Rhodium (Rh), Iridium (Ir), Nickel (Ni), Palladium (Pd ), At least one metal or metal oxide selected from platinum (Pt), copper (Cu), silver (Ag), gold (Au), and aluminum (Al); And
At least one adsorbent selected from activated carbon, activated carbon fiber, zeolite, cyclodextrin, silicate, activated alumina, apatite hydroxide, apatite carbonate, calcium monophosphate and calcium triphosphate
Air filter, characterized in that the coating.
The method of claim 1,
The quaternary ammonium system is Choline, Carnitine, Benzalkonium chloride; Denatonium; Cetrimonium bromide; Diallyldimethyl ammonium chloride; 3-chloro-2-hydroxypropyltrimethylammonium chloride (CHPTAC); Copolymers of acrylamide and quaternized dimethylammoniumethyl methacrylate (Copolymer of acrylamide and quaternized dimethylammoniumethyl methacrylate); Diallyldimethylammonium chloride (Poly (diallyldimethylammonium chloride)); Copolymers of acrylamide and diallyldimethylammonium chloride; Quaternized hydroxyethyl cellulose; Copolymers of vinylpyrrolidone and quaternized dimethylaminoethyl methacrylate (Copolymer of vinylpyrrolidone and Quaternized dimethylaminoethyl methacrylate); Copolymers of vinylpyrrolidone and quaternized vinylimidazoles; Copolymers of acrylic acid and diallyldimethylammonium chloride (Copolymer of Acrylic Acid and Diallyldimethylammonium Chloride); Copolymers of vinylpyrrolidone and methacrylamidopropyltrimethylammonium (Copolymer of vinylpyrrolidone and methacrylamidopropyl trimethylammonium); Poly (acrylamide 2-methacryloxyethyl ammonium chloride) Poly (acrylamide 2-methacryloxyethyltrimethyl ammonium chloride); Terpolymer of Acrylic Acid, Acrylamide and Diallyldimethylammonium Chloride; Terpolymer of vinylcaprolactam, vinylpyrrolidone, and quaternized vinylimidazole); vinylcaprolactam, vinylpyrrolidone and quaternized vinylimidazole; And terpolymers of acrylic acid, methacrylamidopropyl trimethyl ammonium chloride, and methyl acrylate.
The method of claim 1,
The filter medium is polyethylene naphthalate, polyester, polypropylene, polystyrene, polyethylene, polypropylene, polyvinyl chloride, ethylene vinyl acetate, polyethylene terephthalate, polycarbonate, polybutylene terephthalate, polyacetal, polyamide, glass fiber Air filter, characterized in that made of one or two or more compounds selected from ceramic fibers and silica glass fibers.
delete The method of claim 1,
The adsorbent is 0.5 to 20 parts by weight based on 100 parts by weight of the filter medium, characterized in that the air filter, characterized in that configured in the size of 20 ㎛ ~ 2.0 mm.
The method of claim 1,
It further comprises a binder coated on the filter medium, the binder is starch, cellulose and its derivatives, alginic acid, gelatin, polyvinyl alcohol, water-dispersible acrylic resins and derivatives thereof and water-dispersible vinyl acetate resins, chrommanindene-based resins , Terpene resin, terpene phenol resin, aromatic hydrocarbon modified terpene resin, terpene hydrogenated resin, terpene phenol hydrogenated resin, rosin resin, hydrogenated rosin ester resin, rosin modified phenol resin, alkyl Phenolic resin, alkylphenol acetylene resin, alkylphenol formaldehyde resin, styrene resin, aliphatic petroleum resin, cycloaliphatic petroleum resin, copolymer petroleum resin, aromatic petroleum resin, xylene resin, xylene formaldehyde type Air filter, characterized in that one or two or more compounds selected from resins, polybutenes, liquid rubber.
The method according to claim 6,
The binder is an air filter, characterized in that 0.1 to 10 parts by weight based on 100 parts by weight of the adsorbent.
delete The method of claim 1,
The metal or metal oxide has a particle size of 10 nm ~ 5.0 ㎛, air filter, characterized in that 0.1 to 5.0 g / cm ² coated on the surface of the filter medium.

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