KR102262258B1 - Chemical-chemi adsorption filter for removal of odor and hazardous dust - Google Patents

Abstract

The present invention relates to an adsorption filter for removing harmful substances and odors, and more specifically, to an adsorption filter that uses a non-combustible metal oxide material to have incombustibility and chemical resistance and to remove harmful substances and odors.

Description

Chemical-Chemical adsorption filter for removing harmful substances and odors {CHEMICAL-CHEMI ADSORPTION FILTER FOR REMOVAL OF ODOR AND HAZARDOUS DUST}

The present invention relates to a chemical-chemical adsorption filter for removing harmful substances and odors, and more particularly, to an adsorption filter that uses a non-combustible metal oxide material to have incombustibility and chemical resistance and to remove harmful substances and odors. .

The adsorption filter can remove ozone, acidic or alkaline harmful gases generated in industrial sites, volatile harmful gases or harmful substances and odors generated from incinerators. In general, unlike dust filters that remove foreign substances such as dust through dust collection, adsorption filters use the adsorption properties of activated carbon to remove odors and harmful chemicals, so they can be manufactured in a variety of ways. produced in one form.

However, the type of nonwoven filter incorporating activated carbon has a problem in that performance such as deodorization is deteriorated due to the particulate nature of activated carbon. Recently, in order to solve this problem, a non-woven fabric filter manufactured by directly coating activated carbon on a non-woven fabric has been proposed.

As an example of such a nonwoven filter, activated carbon is sprayed on the fabric impregnated with an adhesive component, and vibration is applied so that the activated carbon particles are deposited from the surface of the fabric to the internal pores, so that the activated carbon is evenly dispersed in the fabric to increase the effect of deodorization. A filter has been developed. However, this type of nonwoven filter also has problems in that the activated carbon particles penetrate between the nonwoven fibers, greatly lowering the air permeability, and increasing the pressure loss, making it difficult to use as an air filter. In order to overcome this problem, if the amount of activated carbon applied to the nonwoven fabric is reduced, there is a problem in that the original performance of activated carbon, such as deodorization, is reduced. In addition, when using such a nonwoven fiber, there is a disadvantage that it is vulnerable to fire and is easily damaged by harmful chemicals.

The following factors should be considered in determining the quality and performance of an adsorption filter: 1) whether the removal efficiency and adsorption capacity of harmful gases and harmful substances is secured, 2) the filter generated by physical impact such as vibration or wind speed Whether abrasion and loss of life occur, 3) whether pressure loss of the fluid passing through the adsorption filter can be minimized during filtration, 4) whether secondary contamination occurs due to the adsorbent used for filtration, etc.

The conventionally known adsorption filter is provided in the form of a matrix in which activated carbon is impregnated with a metal mesh. Since the impregnated activated carbon is used, it can be applied to high-concentration gas with a large amount of collection of harmful gases, and the advantage of low pressure loss is that the impregnated activated carbon particles can be evenly attached to a polymer mesh such as polyethylene or a metal mesh such as aluminum. have. In addition, since the support is flexible, there is an advantage that it can be freely manufactured in a flat, zigzag, or tubular shape. However, in the case of the filter using the activated carbon impregnated with the metal mesh, the longer the purification time, the greater the amount of salt generated, which can block the pores of the adsorption filter, and the pressure of the fluid is lost and the filter function is deteriorated.

Korean Patent Registration No. 10-0358262

In order to solve the problems of the conventional activated carbon nonwoven filter described above, the present invention secures air permeability enough to be used as an air filter while improving performance such as adsorption and deodorization of harmful substances, and a filter used as an adsorption air filter It is to provide an adsorption filter that can increase the adsorption performance of the product while at the same time lower the pressure loss.

Another object of the present invention is to provide an adsorbent nonwoven filter capable of simultaneously satisfying adsorption performance and air permeability while having incombustibility and chemical resistance using a non-combustible metal oxide material.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. will be able

One aspect of the present invention provides an adsorption filter comprising a mesh matrix layer with an adsorbent attached thereto, a sheet matrix layer with an adsorbent attached thereto, an antibacterial filter layer, and a natural fiber layer.

Specifically, the network matrix layer is formed of an organic polymer material such as polyester, nylon, acrylic, polyethylene, polypropylene, etc., and a metal material such as aluminum, copper, iron, and glass according to standards such as flexibility, heat resistance, and secondary contamination. Inorganic materials such as fibers, carbon fibers, etc. Light It is possible to select and use composite materials in which these organic, inorganic and metallic materials are mixed.

More specifically, the mesh matrix layer may include a plurality of nanofibers having a line width of 5 to 50 nm formed by electrospinning a raw material including polyvinylidene fluoride (PVDF) on a substrate. . The nanofibers may be spaced apart from each other at intervals of 5 to 100 nm on the substrate to form a mesh shape.

Here, the "line width" of the nanofiber means the shortest distance among the linear distances in the width direction connecting any two points on the surface of one nanofiber in the width direction perpendicular to the length direction of one nanofiber. The “diameter” of the nanofiber may mean the longest distance among straight-line distances connecting any two points on the surface of one nanofiber in a direction horizontal to the substrate. In addition, the term “gap (or pitch)” may mean the shortest linear distance among the distances between nanofibers adjacent to each other.

More specifically, the network matrix layer is a spinning solution by dissolving polyvinylidene fluoride (PVDF), polyethylene oxide (PEO) and polyacrylonitrile (PAN) together in a solvent as a raw material. A mixing step constituting the composition, forming a nanofiber by applying a high voltage to the spinning solution and electrospinning on a substrate, and selectively removing only PEO from the formed nanofiber to form pores to porous the surface of the nanofiber produced It may be prepared including the steps, but is not limited thereto.

More specifically, the weight ratio of PVDF: PEO: PAN may be 8 to 20 parts by weight of PEO, 45 to 70 parts by weight of PAN relative to 100 parts by weight of PVDF, preferably 12 parts by weight of PEO, 70 parts by weight of PAN compared to 100 parts by weight of PVDF can be negative

If the content of PEO is less than the above range, pore formation due to removal in the spinning process is insufficient, and when a large amount is included, it is difficult to completely remove PEO, and the physical properties of the nanofiber from which PEO is removed have a disadvantage. In addition, if the PAN is less than the above content, the thickness of the nanofiber becomes thick, making it difficult to match the desired thickness, and when the PAN exceeds the above content, there is a problem in that the tensile strength and elongation rate decrease.

As a solvent of the raw material, EMC (ethyl methyl carbonate), NMP (Nmethyl-2-pyrrolidone), DMA (dimethyl acetamide), DMF (N,N-dimethylformamide), DMSO (dimethyl sulfoxide), THF (tetra-hydrofuran), At least one selected from the group consisting of ethylene carbonate (EC), diethyl carbonate (DEC), dimethyl carbonate (DMC), propylene carbonate (PC), and acetone may be used. Specifically, it was confirmed that the highest yield was obtained when DMA and NMP were mixed in a ratio of 1:2.

The PVDF, PEO and PAN mixture is dissolved in a solvent at 85° C. in which DMA and NMP are mixed in a ratio of 1:2 to prepare a solution having a concentration of 20% (w/w), and 2 to 2 to water based on 100 parts by weight of the solution 4 parts by weight were added and mixed. When mixed with water, more pores may be formed due to the vapor pressure difference and liquid-liquid phase separation.

The spinning solution was connected to a spinneret, and a voltage of 70 kV was applied at 45° C., and electrospinning was performed by discharging it at a rate of 0.05 to 1 cc/g per hole to obtain nanofibers.

The nanofibers formed by electrospinning the raw material may be subjected to a process of dissolving PEO using water at 50°C to 70°C. Through this process, pores are formed in the nanofiber to obtain a porous nanofiber. In the network matrix layer of the present invention, the porous nanofibers are formed in the form of a nanomesh, and harmful substances and fine particles may be collected by the porosity and mesh form of the nanofibers.

The sheet-like matrix layer is made of a general hot melt nonwoven fabric, and the manufacturing components of the nonwoven fabric are mixed with polyolefin polymer: polyamide polymer: composite metal oxide in a weight ratio of 100: 100: 15, and then mixed with an adhesive. It was prepared as a hot-melting sheet foam by melting at a temperature of 100 to 250 ℃, but is not limited thereto. The sheet-like matrix layer may be provided with non-combustibility and chemical resistance by depositing the metal oxide powder on the surface.

When the metal oxide is less than the above numerical range, sufficient incombustibility and chemical resistance of the sheet-like matrix layer cannot be ensured, and when it is added in excess, the flexibility of the nonwoven fabric is deteriorated, resulting in a side effect of crumbling.

Specifically, the metal element constituting the metal oxide is not particularly limited, and any metal element constituting the oxide stable at room temperature, atmospheric pressure, and air may be used. For example, the metal oxide may be a single oxide such as silica (silicon dioxide), alumina, titania, zirconia, magnesia (MgO), iron oxide, copper oxide, zinc oxide, tin oxide, tungsten oxide, vanadium oxide, and the like, and two or more kinds. and complex oxides containing a metal element (eg, silica-alumina, silica-titania, silica-titania-zirconia, etc.). In the case of the composite oxide, it is also possible for the single oxide to contain, as a constituent metal element, an alkali metal or alkaline earth metal (after the fourth period of the periodic table), which is relatively sensitive to moisture.

Among the metal oxides that can be used in the present invention, silica or a composite oxide containing silica as a main component is preferable from the viewpoints of being lightweight, allowing a bulk density to be made smaller, and being inexpensive and readily available. The silica as the main component means that the molar ratio of silicon (Si) in the group of elements other than oxygen contained in the composite oxide is 50% or more and less than 100%, preferably 65% or more, and more preferably 75% or more, more preferably 80% or more.

In the case of using a composite oxide containing silica as a main component, preferred metal elements contained in addition to silicon include a group II metal of the periodic table such as magnesium, calcium, strontium, and barium, and a periodic table agent such as aluminum, yttrium, indium, boron, and lanthanum. Group III metals (in addition, boron is treated as a metal element), and Group IV metals of the periodic table such as titanium, zirconium, germanium, and tin can be exemplified. Among these, Al, Ti, and Zr are particularly It can be employ|adopted preferably. The composite oxide containing silica as a main component may contain 2 or more types of metal elements other than silicon.

The metal oxide powder of the present invention has a specific surface area (BET specific surface area) of 400 to 1000 m 2 /g by BET method, preferably 400 to 850 m 2 /g. It shows that the particle diameter of the primary particle which comprises the porous structure (network structure) of the independent particle|grains of a metal oxide powder is small, so that a specific surface area is large. Therefore, the larger the BET specific surface area, the smaller it is possible to form the skeletal structure of the metal oxide powder particles with a smaller amount of metal oxide.

In addition, the specific surface area by the BET method is, as described above, the sample to be measured is dried at a temperature of 200° C. for 3 hours or more under a reduced pressure environment of 1 kPa or less, followed by nitrogen at a liquid nitrogen temperature. It is a value calculated|required by acquiring the adsorption isotherm of only the adsorption|suction side of and analyzing by the BET method.

The metal oxide of the present invention may be in the form of a powder, but is not limited thereto.

Specifically, the composite metal oxide of the present invention may be a mixture of silica-titania, silica-alumina, and silica-zirconia in a weight ratio of 1:1.5:1, but is not limited thereto.

As the adsorbent used in the adsorption filter, a porous ion exchange resin, a porous organic-inorganic composite adsorbent, impregnated activated carbon, an inorganic adsorbent, and a nanopore inorganic adsorbent may be used. The moisture content of the adsorbent is preferably 10 to 35%. These adsorbents may be manufactured in various shapes and sizes, such as spherical, granule, injection, or extrudate.

The impregnated activated carbon adsorbent is for adsorbing and filtering general harmful gases such as ozone and VOCs. Activated carbon produces particulate, injection, or extruded activated carbon having a high specific surface area of 1,000 m 2 /g or more and an average particle diameter of 0.05-2.00 mm, and an adsorbent material having the ability to adsorb harmful gases, for example It may be prepared by impregnating an adsorbent such as KI or H3PO3.

In one embodiment, when the adsorbent attached to the network matrix layer and the sheet matrix layer is impregnated activated carbon, the impregnated activated carbon may have metal-silica porous particles having a core-shell structure impregnated on the surface of the impregnated activated carbon. Metal-silica porous particles may also have adsorption performance similar to activated carbon. When activated carbon having metal-silica porous particles is attached to the mesh matrix layer and the sheet matrix layer, the adsorption filter of the present invention can further improve adsorption performance of harmful substances or odors.

The metal-silica porous particles having a core-shell structure may include a metal compound in a core portion and silica in a shell portion surrounding the metal compound. The metal compound of the core part may be used without particular limitation as long as it is a compound containing a transition metal ion, but usually hydroxides, oxides, carbonates, etc. may be applied. Here, the metal is preferably any one of iron (Fe), nickel (Ni), cobalt (Co), manganese (Mn), and copper (Cu). The metal compound of the core part may have a particle size of 1 μm or less, or a size of 500 nm to 800 nm. When the particle size of the core portion is larger than 1 μm, the specific surface area is small and the adsorption property may be deteriorated.

The shell part including silica may be formed by adding a silica precursor to a solvent in which the metal compound of the core part is dispersed. When the metal compound is prepared, it is dispersed in a solvent, and sodium silicate (Na2SiO3) or an organosilicon compound (for example, an alkoxide compound) as a silica precursor is added to the solvent and hydrolyzed to form a silica shell surrounding the metal compound. can be

The metal-silica particles of the core-shell structure prepared as described above are separated from the solvent, washed, and calcined in an oxidizing atmosphere of 500° C. or higher to burn and remove organic matter. Here, pores are formed in the shell part according to combustion of the organic material, so that the metal-silica particles are porous. When the combustion process is completed, the metal compound in the core is reduced to metal particles by heat treatment to obtain metal-silica porous particles.

When the metal-silica porous particles are obtained, the impregnated activated carbon can be prepared by impregnating them on the surface of the activated carbon. First, the metal-silica porous particles are dispersed in a binder solution to prepare a dispersion.

The binder solution may be applied by selecting organic, inorganic and organic-inorganic mixed binders. As the inorganic binder, colloidal silica sol, alumina sol-based, sodium silicate-based, natural or synthetic clay dispersion may be applied. Alternatively, as the organic binder, a polymer material such as polyvinyl alcohol, polyethylene glycol, polyacrylic acid, polymethyl methacrylate, or hydroxypropylmethyl cellulose may be applied. However, the present invention is not limited thereto, and the binder solution may be applied by mixing the inorganic binder and the organic binder in an appropriate ratio. In particular, by mixing the colloidal silica sol and the synthetic clay dispersion, the inorganic binder can adhere the porous particles to the surface of the activated carbon well without blocking the pores between the activated carbon and the metal-silica porous particles.

The mixing ratio of the metal-silica porous particles and the binder solution is preferably in the range of 1:10 to 1:50. When the mixing ratio of the porous particles and the binder solution is 1:10 or less, that is, when the amount of the binder solution is small, it is difficult for the metal-silica porous particles to be uniformly dispersed in the binder solution, so that the process of adhering with the activated carbon may not be performed well. On the other hand, when the mixing ratio of the porous particles and the binder solution is 1:50 or more, the adsorption capacity of the impregnated activated carbon may be low because the content of the metal-silica porous particles is too small.

Activated carbon is immersed in the thus prepared dispersion of the metal-silica porous particles and the binder solution, and the metal-silica porous particles are attached to the surface of the activated carbon. As described above, the activated carbon may be a particle type, injection type, or extrusion type activated carbon having a specific surface area of 1,000 m 2 /g or more and an average particle diameter of 0.05-2.00 mm. The content of activated carbon immersed in the dispersion may be adjusted according to the content ratio of metal-silica porous particles. In addition, as described above, the activated carbon to which the metal-silica porous particles are impregnated is attached to the network matrix layer and the sheet matrix layer, and as each matrix layer has different surface properties, the ratio of the attached activated carbon may be different, Accordingly, the content of the metal-silica porous particles may also vary depending on which matrix layer the activated carbon is attached to.

The porous nanofibers are formed on the surface of the mesh matrix layer in the form of a mesh, and if the activated carbon is attached thereto, it may be attached on the nanofibers or between the nanofibers formed in the mesh form. When an excessive amount of activated carbon is attached to the mesh matrix layer, the space between the nanofibers may be filled. In this case, the adsorption performance of harmful substances may be improved, but the air permeability to the air filter may be reduced. On the other hand, since the sheet-like matrix layer does not have a mesh-like structure formed on its surface, it is okay if an excess of activated carbon is attached to the sheet-like matrix layer. Accordingly, the weight ratio of the activated carbon and the metal-silica porous particles in the impregnated activated carbon attached to each matrix layer may be different as well as the weight of the impregnated activated carbon attached to each of the matrix layer and the sheet-like matrix layer is different. .

For example, the impregnated activated carbon attached to the network matrix layer may contain 60 to 80 parts by weight of metal-silica porous particles based on 100 parts by weight of the activated carbon, and the impregnated activated carbon attached to the sheet-like matrix layer is metal based on 100 parts by weight of the activated carbon. - The silica porous particles may be included in an amount of 30 to 50 parts by weight. Since a smaller amount of impregnated activated carbon is attached to the network-type matrix layer than the sheet-like matrix layer, a larger amount of metal-silica porous particles may be attached to the surface of the activated carbon in consideration of the low content of the impregnated activated carbon. A weight ratio of the impregnated activated carbon adhered to the network matrix layer to the impregnated activated carbon adhered to the sheet-shaped matrix layer may be in a range of 1:2 to 1:5.

This may be adjusted in consideration of the adsorption capacity of harmful substances and odors in the adsorption filter, and air permeability as an air filter. In the impregnated activated carbon attached to the network matrix layer, when the amount of metal-silica porous particles is less than 60 parts by weight relative to 100 parts by weight of the activated carbon, the adsorption performance may be insufficient in the network matrix layer, and when it contains 80 parts by weight or more, The pores formed in the activated carbon itself are clogged by the metal-silica porous particles, which may make it difficult to secure sufficient air permeability. Similarly, when the impregnated activated carbon attached to the sheet-like matrix layer contains 30 parts by weight or less of metal-silica porous particles relative to 100 parts by weight of activated carbon, the adsorption performance may be insufficient in the sheet-like matrix layer, and 50 parts by weight or more When included, the pores formed in the activated carbon itself are clogged by the metal-silica porous particles, and it may be difficult to secure sufficient ventilation in the sheet-like matrix layer to which a relatively large amount of impregnated activated carbon is attached.

When the metal-silica porous particles are sufficiently attached to the surface of the activated carbon, the activated carbon having the porous particles attached thereto is separated from the dispersion to perform a heat treatment process. The heat treatment process may increase the bonding force between the metal-silica porous particles and the activated carbon impregnated with the binder. The heat treatment process may be performed for 30 minutes to 10 hours in a temperature range of 400° C. to 600° C. under an oxidizing or reducing atmosphere such as air, oxygen, hydrogen or nitrogen. If the heat treatment process is performed at a temperature of 400° C. or less for 30 minutes or less, the porous particles may not be sufficiently attached to the surface of the activated carbon and thus may be separated from each other. On the other hand, if the heat treatment process is performed at a temperature of 600° C. or more for 10 hours or more, the activated carbon and porous particles may be damaged or severely crushed as the activated carbon and porous particles are exposed at high temperature for a long time. By appropriately heat-treating for the above-described temperature range and time range, activated carbon having metal-silica porous particles impregnated therein can be obtained.

Meanwhile, as described above, since the impregnated activated carbon attached to the network matrix layer and the impregnated activated carbon attached to the sheet matrix layer have different content ratios of metal-silica porous particles, the conditions of the subsequent heat treatment process may be different from each other. For example, the impregnated activated carbon attached to the mesh matrix layer is prepared by heat treatment at 500° C. to 600° C. for 4 to 10 hours, and the impregnated activated carbon attached to the sheet-like matrix layer is 30° C. to 400° C. to 500° C. It can be prepared by heat treatment for minutes to 6 hours. Since the impregnated activated carbon attached to the network matrix layer contains metal-silica porous particles in a larger amount than the activated carbon, a dispersion may be prepared with a binder solution having a larger content. Accordingly, the subsequent heat treatment process may also be performed at a relatively high temperature for a long time. On the other hand, since the impregnated activated carbon attached to the sheet-like matrix layer contains a smaller amount of metal-silica porous particles compared to the activated carbon, a dispersion may be prepared with a binder solution having a smaller content. Accordingly, the subsequent heat treatment process may also be performed at a relatively low temperature for a short time.

The impregnated activated carbon prepared in this way can be attached to the mesh matrix layer and the sheet matrix layer, respectively, and the adsorption filter prepared including the same can secure excellent adsorption performance and air permeability. In addition, as the sheet-like matrix layer is treated with a composite metal compound as described above, excellent oxidation resistance and heat resistance may be secured.

The ion exchange resin adsorbent may be a cation exchange resin or an anion exchange resin, and a mixture of the ion exchange resins is also possible. Moreover, various ion exchange resins, such as a phenol type, acryl type, a styrene type, can also be used. Ion exchange resin type adsorbents are porous adsorbents with a specific surface area of 300 m 2 /g or more, and are divided into anionic and cationic exchange resins according to the type of functional group attached to the resin surface. These ion exchange resin type adsorbents have a spherical shape with an average particle diameter (d) in the range of 0.1 -1.0 mm, and have an ion exchange capacity of 1.0-4.0 units/kg to adsorb harmful gases through acid-base neutralization reaction. will be removed

The inorganic adsorbent may be a porous adsorbent such as silica, activated alumina, zeolite, or pillared clay, a metal adsorbent such as magnesium oxide, zirconium oxide, or titanium oxide, or an adsorbent in which the material is hybridized with an organic material such as activated carbon.

In the case of nanoporous inorganic adsorbents, the materials are the same as those of inorganic adsorbents, but they are microporous, mesoporous, and macroporous particles with very fine adsorbent particles, and are highly functional adsorbents with very specialized performance and properties. to be. The nanopore inorganic adsorbent has an excellent effect of adsorbing even a very small amount of harmful substances.

In addition, the adsorption filter according to the present invention can be manufactured using only one type of the above-mentioned adsorbent, but it can also be used in the form of a mixture of two or more activated carbon, ion exchange resin, inorganic adsorption type adsorbent and nano-pore inorganic adsorbent. When a mixed adsorbent is used, it is possible to remove trace amounts of ozone, acidic or alkaline harmful gases, volatile harmful gases or harmful substances, thereby maximizing the adsorption performance of the filter.

The organic-inorganic composite adsorbent is an adsorbent in which an organic adsorbent component having a functional group is grafted onto the surface of a porous inorganic carrier having a large surface area. Here, as the inorganic carrier, a material having a specific surface area of 300 m 2 /g or more, for example, silica, alumina, zeolite, or a mesopore material (MCM-41, etc.) is used, and an average particle size of 0.05-0.20 mm is a particle type or a spherical shape. manufactured and used. In addition, the organic material for attaching the inorganic carrier may include a functional group having OH such as RSO3H or RNH4OH, and this organic component is prepared by grafting the inorganic carrier surface with a coupling agent such as alkyl silane.

The adsorbent is used by selecting one or more suitable adsorbents from among the adsorbents according to the harmful substances to be removed. For example, if the harmful gas is an acidic gas such as HF, HCl, SOx, etc., an alkaline ion exchange resin, an organic-inorganic composite adsorbent, or an inorganic adsorbent such as activated carbon or zeolite is effective. In the case of an alkaline noxious gas such as ammonia, acid It is effective to use inorganic adsorbents such as ion exchange resins, organic-inorganic composite adsorbents, activated carbon or zeolite.

In addition, in the case of volatile organic compounds such as organic amines, organic solvents, ozone, dioxin, and phthalate-based plasticizers such as DOP, it is difficult to adsorb and remove harmful gases due to acid-alkaline neutralization, and harmful substances are removed by capillary action due to micropores. In this case, a porous adsorbent having a high specific surface area of 500 m 2 /g or more may be used, such as an inorganic adsorbent such as activated carbon or zeolite.

In addition, specifically, the antibacterial filter layer is a natural product-derived extract that exhibits an antibacterial effect on the first antibacterial filter layer and the fabric coated with nanoparticles of one or more selected from the group consisting of copper (Cu), tin (Sn) and silver (Ag) It may be composed of a second antibacterial filter layer prepared by coating, but is not limited thereto.

More specifically, the first antibacterial filter layer made of copper, tin and silver may have a content of 74 to 77.2 wt% of copper, 20 to 22.3 wt% of tin, and 0.5 to 6 wt% of silver, but is limited thereto no.

In addition, the extracts derived from natural products that specifically exhibit the antibacterial effect are natural products that exhibit antibacterial and antiviral effects, and include myrrh (Commiphora 　myrrha Holmes), frankincense (Boswellia Carterii), Lonicera japonica, octagonal (八角, Illicium verum Hook. f.), Bongchul (Curcuma zedoaria), Tetragonia tetragonioides, Schisandra chinensis, Artemisia campestris, pine needles, and propolis may be extracted after mixing at least one natural product. However, it is not limited thereto.

More specifically, the mixed extract contains 15 parts by weight of myrrh (Commiphora 　myrrha Holmes), 10 parts by weight of stems and roots of Boswellia Carterii, 10 parts by weight of Lonicera japonica, octagonal (八角, Illicium verum Hook). f.) 8 parts by weight, Curcuma zedoaria 5 parts by weight, Tetragonia tetragonioides 5 parts by weight, Schisandra chinensis 5 parts by weight, Artemisia campestris 3 parts by weight, pine needles 3 parts by weight And 1 part by weight of propolis may be mixed, and it may be prepared by reflux extraction with 80% to 90% of ethanol at 75° C. for 2 to 4 hours, but is not limited thereto.

In the present invention, specifically, the extract derived from the natural product may be extracted with water, a C1 to C4 lower alcohol, or a mixed solvent thereof. More specifically, it may be extracted using distilled water or 80% to 90% ethanol, but is not limited thereto.

Specifically, in the extraction process of the extract, one or more methods selected from the group consisting of cold chim, warm chim, heating, reflux and ultrasonic extraction may be used alone or in combination, and the present invention is not limited thereto, and may be appropriately changed and applied as necessary. can

In addition, after performing the extraction or fractionation process, the extract may be concentrated or the solvent may be removed by performing a filtration process under reduced pressure or further concentration and/or freeze-drying, specifically, the process of concentration under reduced pressure after extraction The extract can be obtained through the process, but it is not limited thereto, and it can be applied by appropriately changing it.

Specifically, the fibers constituting the natural fiber layer of the adsorption filter are made of eco-friendly natural fibers, and may be fabrics manufactured using fibers obtained from cotton, hemp husks and coconut husks. More specifically, the fiber is cooked by adding 10 to 20 parts by weight of purified water of cotton fiber, hemp husk and coconut husk, and then soaking for 24 hours, and then heating it in water at 120° C. for 1 hour to 5 hours. (蒸解) step, 10 to 15 parts by weight of Lactobacillus salivarius and 5 to 10 parts by weight of Micrococcus roseus, 3 parts by weight of pectin, and 3 parts by weight of fructooligosaccharide were mixed at room temperature. Those prepared by aging for 2 to 4 hours were used. However, the present invention is not limited thereto and may be appropriately changed and applied as needed.

At this time, in order to impart incombustibility and chemical resistance to the natural fiber layer, the composite metal oxide was treated in the same manner as in the mesh matrix.

The adsorption filter of the present invention improves the performance of adsorption and deodorization of harmful substances, and secures the air permeability enough to be used as an air filter, thereby increasing the adsorption performance of the filter used as an adsorption air filter and at the same time lowering the pressure loss. characterized by having

In addition to improving workability by preventing sagging or thermal deformation of the filter, the filter adsorption power is improved compared to the conventional single-layer or same type of matrix laminated filter, and a new filter capable of adsorbing various types of contaminants. it's about

In addition, the filter of the present invention uses a non-combustible metal oxide material to exhibit non-combustibility and chemical resistance, while the impregnated activated carbon with metal-silica porous particles attached to the surface is attached, so that excellent adsorption performance and breathability can be satisfied at the same time. do it with

It should be understood that the effects of the present invention are not limited to the above-described effects, and include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

In addition, terms including ordinal numbers such as 1st, 2nd, etc. are used to describe various components, and are used only for the purpose of distinguishing one component from other components, and limiting the components. not used for For example, without departing from the scope of the present invention, the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component.

In addition, the terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In addition, terms such as "comprises" or "have" described herein are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or the It should be understood that the above does not preclude the possibility of the existence or addition of other features or numbers, steps, operations, components, parts, or combinations thereof.

Also, "a or an", "one", "the" and like related terms are used differently herein in the context of describing the invention (especially in the context of the following claims). Unless indicated or clearly contradicted by context, it may be used in a sense including both the singular and the plural.

In addition to the above-mentioned terms, specific terms used in the following description are provided to help the understanding of the present invention, and the use of these specific terms may be changed to other forms without departing from the technical spirit of the present invention.

Hereinafter, the present invention will be described in detail by way of Examples. However, the following examples are merely illustrative of the present invention, and the present invention is not limited by the following examples.

Example 1. Preparation of the adsorption filter of the present invention

The adsorption filter of the present invention was composed of an adsorbent, a mesh matrix layer with impregnated activated carbon with metal-silica porous particles attached to the surface, a sheet matrix layer with an adsorbent attached thereto, an antibacterial filter layer, and a natural fiber layer.

Specifically, the mesh matrix layer was prepared by forming porous nanofibers using PVDF as a main raw material at intervals of about 5 to 100 nm. Details of this are the same as described above.

The sheet-like matrix layer is prepared by mixing a polyolefin-based polymer: a polyamide-based polymer: a composite metal oxide in a weight ratio of 100: 100: 15, followed by a hot-melting sheet foam. Details of this are the same as described above.

The preparation of the impregnated activated carbon in which the metal-silica porous particles are attached to the surface is as follows. First, activated carbon had a specific surface area of 1,000 m 2 /g or more, and particle-type activated carbon having an average particle diameter of 0.05-2.00 mm was prepared, and for the metal compound, iron oxide having a particle size of 500 nm to 800 nm was prepared, and the silica precursor was Sodium silicate was prepared. In addition, as the binder solution, an inorganic binder in which colloidal silica sol and synthetic clay dispersion were mixed was prepared. Impregnated activated carbon with metal-silica porous particles was prepared using each of the components prepared in this way, and the details thereof are as described above.

Here, the impregnated activated carbon attached to the network matrix layer was prepared to include 65 parts by weight of metal-silica porous particles relative to 100 parts by weight of activated carbon, and the subsequent heat treatment process was performed by heat treatment at a temperature of 500° C. to 550° C. for 8 hours. The impregnated activated carbon attached to the sheet-like matrix layer was prepared to include 35 parts by weight of metal-silica porous particles relative to 100 parts by weight of activated carbon, and the subsequent heat treatment process was performed by heat treatment at a temperature of 450° C. to 470° C. for 3 hours. In addition, the weight ratio of the impregnated activated carbon adhered to the mesh matrix layer and the impregnated activated carbon adhered to the sheet-shaped matrix layer was adjusted to 1:4.

The antibacterial filter layer is a first antibacterial filter layer coated with nanoparticles of one or more selected from the group consisting of copper (Cu), tin (Sn) and silver (Ag) and an extract derived from a natural product having an antibacterial effect on the fabric. It was composed of a second antibacterial filter layer, and details thereof are the same as described above.

In addition, lastly, the natural fiber layer constituting the adsorption filter was prepared by treating fibers obtained from hemp husks and coconut husks with microorganisms and complex metal oxides, and the details are the same as described above.

Comparative Example 1. Preparation of adsorption filter not attached with impregnated activated carbon

The adsorption filter of Comparative Example 1 of the present invention was prepared in the same manner as in Example 1, except that in the method of manufacturing the adsorption filter of Example 1, the step of attaching the impregnated activated carbon to the mesh matrix layer and the sheet matrix layer was omitted. .

Comparative Example 2. Preparation 1 of an adsorption filter in which the same impregnated activated carbon was attached to a mesh/sheet matrix layer

Comparative Example 2 of the present invention in the same manner as in Example 1, except that in the method of manufacturing the adsorption filter of Example 1, the weight ratio of the net matrix layer and the impregnated activated carbon attached to the sheet matrix layer was adjusted to 1:1. of the adsorption filter was prepared.

Comparative Example 3. Preparation of an adsorption filter in which the same impregnated activated carbon is attached to a mesh/sheet matrix layer 2

In the method of manufacturing the adsorption filter of Example 1, the adsorption of Comparative Example 2 of the present invention was performed in the same manner as in Example 1, except that the net matrix layer and the impregnated activated carbon adhered to the sheet matrix layer were prepared by the following method. A filter was prepared.

The impregnated activated carbon was prepared to include 65 parts by weight of metal-silica porous particles relative to 100 parts by weight of activated carbon, and the subsequent heat treatment process was prepared by heat treatment at a temperature of 500° C. to 550° C. for 8 hours. The impregnated activated carbon thus prepared was equally attached to the net matrix layer and the sheet matrix layer, respectively, and the weight ratio of the impregnated activated carbon adhered to the net matrix layer and the sheet matrix layer was adjusted to 1:1.

Comparative Example 4 Manufacture of an adsorption filter in which the same impregnated activated carbon is attached to a mesh/sheet matrix layer 3

In the method of manufacturing the adsorption filter of Example 1, the adsorption of Comparative Example 4 of the present invention was performed in the same manner as in Example 1, except that the net matrix layer and the impregnated activated carbon adhered to the sheet matrix layer were prepared by the following method. A filter was prepared.

The impregnated activated carbon was prepared to include 35 parts by weight of metal-silica porous particles relative to 100 parts by weight of activated carbon, and the subsequent heat treatment process was prepared by heat treatment at a temperature of 450° C. to 470° C. for 3 hours. The impregnated activated carbon thus prepared was equally attached to the net matrix layer and the sheet matrix layer, respectively, and the weight ratio of the impregnated activated carbon adhered to the net matrix layer and the sheet matrix layer was adjusted to 1:1.

Comparative Example 5. Preparation of an adsorption filter in which the same impregnated activated carbon is attached to a mesh/sheet matrix layer 4

In the method of manufacturing the adsorption filter of Example 1, the adsorption of Comparative Example 5 of the present invention was performed in the same manner as in Example 1, except that the net matrix layer and the impregnated activated carbon adhered to the sheet matrix layer were prepared by the following method. A filter was prepared.

The impregnated activated carbon attached to the network matrix layer was prepared to include 65 parts by weight of metal-silica porous particles relative to 100 parts by weight of activated carbon, and the subsequent heat treatment process was performed by heat treatment at a temperature of 450° C. to 470° C. for 3 hours. The impregnated activated carbon attached to the sheet-like matrix layer was prepared to include 35 parts by weight of metal-silica porous particles relative to 100 parts by weight of activated carbon, and the subsequent heat treatment process was performed by heat treatment at a temperature of 450° C. to 470° C. for 3 hours. Here, the weight ratio of the activated carbon impregnated to the mesh matrix layer and the sheet matrix layer was adjusted to 1:4.

Comparative Example 6. Preparation of adsorption filter not treated with composite metal oxide

An adsorption filter of Comparative Example 6 of the present invention was manufactured in the same manner as in Example 1, except that the step of treating the composite metal oxide was omitted in the method of manufacturing the adsorption filter of Example 1.

Comparative Example 7. Preparation of adsorption filter without antibacterial filter layer

The adsorption filter of Comparative Example 7 of the present invention was manufactured in the same manner except that the antibacterial filter layer was omitted from the method of manufacturing the adsorption filter of Example 1.

Experimental Example 1. Confirmation of harmful gas removal rate and non-combustibility

The difference in harmful gas removal rate and flammability was compared according to the manufacturing method of the adsorption filter of the present invention.

At this time, the chemical resistance is immersed in NaOH 10% solution for 24 hours, washed in running water, dried the Examples and Comparative Examples in a natural state, and checked the crack state to decrease the hardness by hydrolysis and dilute to 10% After exposure to the hydrochloric acid solution, two experiments were conducted to check the degree of corrosion, and are shown in Table 1 below.

division Harmful gas removal rate (%) nonflammable chemical resistance Example 1 99.7 ◎ ◎ Comparative Example 1 79.3 ◎ ◎ Comparative Example 2 91.5 ◎ ◎ Comparative Example 3 99.1 ◎ ◎ Comparative Example 4 85.4 ◎ ◎ Comparative Example 5 89.2 ◎ ◎ Comparative Example 6 98.5 X X Comparative Example 7 98.9 ◎ ◎

(◎: Excellent, △: Average, Х: Poor).

As shown in Table 1 above, in Example 1, Comparative Example 6, and Comparative Example 7 of the present invention, the mesh-type matrix layer and the sheet-type matrix layer were respectively attached with impregnated activated carbon adjusted to specific conditions, so a very excellent removal rate of harmful gases was found to represent Similarly, in the case of Comparative Example 3, the network-type matrix layer and the sheet-type matrix layer each contained a higher amount of metal-silica porous particles than the activated carbon in the impregnated activated carbon, so it can have a harmful gas removal rate similar to that of Example 1. there was.

On the other hand, in Comparative Example 1 to which the impregnated activated carbon was not attached, it was found that the harmful gas removal rate was significantly lower than that of Example 1, and Comparative Example 2 in which the weight ratio of the impregnated activated carbon attached to the mesh/sheet type matrix layer was 1:1 was found to have a relatively low removal rate of harmful gases. Comparative Example 2 can be confirmed that compared to Example 1, the removal ability of the sheet-like matrix layer is insufficient.

In addition, similarly, when the impregnated activated carbon attached to the network matrix layer and the sheet matrix layer has a low content of metal-silica porous particles compared to Example 1 (Comparative Example 4), or when only a low-temperature heat treatment process is performed It was also found that the removal rate of harmful gases was insufficient in (Comparative Example 5). In Comparative Example 4, the impregnated activated carbon attached to the network matrix layer did not have a sufficient amount of metal-silica porous particles. It could be confirmed that the silica porous particles were not attached to the surface of the activated carbon and were separated. In addition, Comparative Example 6, in which the composite metal compound was not treated, showed poor nonflammability and chemical resistance.

Experimental Example 2. Check whether breathability

Since the adsorption filter of the present invention can remove harmful gases and exhibits excellent air permeability as an air filter, the air permeability performance was confirmed using the adsorption filter.

Specifically, a breathing mask was manufactured using the adsorption filter of Example 1 and Comparative Examples 1 to 5, and after wearing the mask to 5 examiners, it was evaluated whether there was any discomfort in breathing. Each examiner gave 5 points for 'easy breathing', 4 points for 'not breathing smoothly', and 3 points for 'extremely difficult breathing', and the scores of each examiner were averaged and compared.

division Breathability Assessment Example 1 4.7 Comparative Example 1 4.8 Comparative Example 2 4.6 Comparative Example 3 2.3 Comparative Example 4 4.7 Comparative Example 5 4.8

As shown in Table 2, it was found that the adsorption filter of Example 1 of the present invention did not significantly lag behind in the air permeability evaluation result when compared with Comparative Example 1 in which the impregnated activated carbon was not treated. Comparative Example 1 to which the impregnated activated carbon was not attached obtained the highest score in the air permeability evaluation, and Comparative Example 1 and Comparative Examples 2 to 5 to which the impregnated activated carbon was attached obtained a relatively low score compared to Comparative Example 1. Among them, it was found from Comparative Example 3 that, when the impregnated activated carbon attached to each matrix layer contained an excessive amount of metal-silica porous particles, the air permeability was rather deteriorated.

Experimental Example 3. Effect of odor removal and confirmation of occurrence of odor due to secondary pollution

Since the adsorption filter of the present invention simultaneously exhibits the effect of removing odors in addition to harmful gases, the effect of removing the odor of the adsorption filter of the present invention was confirmed using food waste.

In addition, as the organic material was adsorbed on the surface of the adsorption filter, secondary contamination by microbial propagation occurred, and it was further checked whether there was an odor generated therefrom.

Specifically, the filters of Examples and Comparative Examples were installed in the exhaust pipe of a conventional food waste reduction device, respectively.

The exhaust pipe was set to forcibly exhaust moisture and odors generated in the process of drying the food waste at a flow rate of 3.3 m/s, and five general inspectors tested the odor-reducing effect using a sensory method.

The inspection method was conducted by having 5 inspectors sniff each at a position about 30 cm away from the outlet of the food waste exhaust pipe, then 5 points for 'no odor at all', 4 points for 'no odor at all', and 4 points for 'no odor.' ' is 3 points, '

2 points were given for 'severe odor' and 1 point for 'very bad odor', and the scores of each tester were averaged and compared.

In addition, after the inspection was completed, the filters of the Examples and Comparative Examples were stored at room temperature for 3 days, and the same inspector was placed in the exhaust port without food waste, and the occurrence of odor due to secondary pollution was checked in the same manner. .

division Deodorizing effect (d+0) Deodorizing effect (d+3) Example 1 4.7 4.9 Comparative Example 1 4.2 4.5 Comparative Example 6 4.4 4.7 Comparative Example 7 4.3 2.5

As shown in Table 3, Example 1, which is an adsorption filter of the present invention, exhibits an excellent deodorizing effect, and in particular, there is no food waste in the experiment after 3 days, so only a slight musty smell can be smelled, which gives a higher score obtained. On the other hand, in the case of Comparative Example 7, in which the antibacterial filter layer was omitted, secondary contamination such as microbial propagation of organic matter occurred after 3 days, and it was confirmed that the score significantly decreased even without food waste.

Certain embodiments of the subject matter described herein have been described. Other embodiments are within the scope of the following claims.

The present description sets forth the best mode of the invention, and provides examples to illustrate the invention, and to enable a person skilled in the art to make and use the invention. This written specification does not limit the present invention to the specific terminology presented. Accordingly, although the present invention has been described in detail with reference to the above-described examples, those skilled in the art can make modifications, changes, and modifications to the examples without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be defined by the described embodiments, but should be defined by the claims.

Claims (7)

a mesh matrix layer with an adsorbent attached thereto;
a sheet-like matrix layer to which an adsorbent is attached;
antibacterial filter layer; and
comprising a layer of natural fibers,
The adsorbent includes an impregnated activated carbon having metal-silica porous particles immobilized on the surface of the core-shell structure,
The network matrix layer is composed of a nano-mesh in which nanofibers having a porous surface are formed at intervals of 5 to 100 nm on a substrate,
The nanofibers of the mesh matrix layer are formed by electrospinning a raw material containing polyvinylidene fluoride (PVDF) on the substrate to have a line width of 5 to 50 nm,
The sheet-like matrix layer is prepared by mixing polyolefin-based polymer: polyamide-based polymer: composite metal oxide in a weight ratio of 100: 100: 15, mixing it with an adhesive, and melting it at a temperature of 100 to 250 ° C. will,
The impregnated activated carbon is prepared by depositing a dispersion in which iron oxide and sodium silicate having a particle size of 500 nm to 800 nm are dispersed on particulate activated carbon having a specific surface area of 1,000 m 2 /g or more and an average particle diameter of 0.05-2.00 mm on the surface. did it,
The impregnated activated carbon attached to the network matrix layer is prepared by heat treatment at a temperature of 500° C. to 550° C. for 8 hours, including 65 parts by weight of metal-silica porous particles relative to 100 parts by weight of activated carbon,
The impregnated activated carbon attached to the sheet-like matrix layer is prepared by heat treatment at a temperature of 450° C. to 470° C. for 3 hours, including 35 parts by weight of metal-silica porous particles relative to 100 parts by weight of activated carbon,
The weight ratio of the impregnated activated carbon adhered to the mesh matrix layer to the impregnated activated carbon adhered to the sheet-shaped matrix layer is 1:4,
The antibacterial filter layer is a first antibacterial filter layer coated with nanoparticles of 74-77.2% by weight of copper, 20-22.3% by weight of tin, and 0.5-6% by weight of silver. It is composed of 2 antibacterial filter layers,
The natural product-derived extract is myrrh ( Commiphora myrrha Holmes ) 15 parts by weight, frankincense tree ( Boswellia Carterii ) stems and roots 10 parts by weight, gold silver ( Lonicera japonica ) 10 parts by weight, octagonal (八角, Illicium verum Hook. f .) 8 parts by weight, Curcuma zedoaria ) 5 parts by weight, Tetragonia tetragonioides 5 parts by weight, Schisandra chinensis 5 parts by weight, Artemisia campestris 3 parts by weight, pine needles 3 parts by weight and propolis An adsorption filter prepared by including 1 part by weight. delete delete delete delete delete delete