KR102275897B1 - Air Purification filter and its manufacturing method - Google Patents

Abstract

The present invention relates to an air purifying filter and a method for manufacturing the same, including a natural protein containing hydrophobic and hydrophilic residues and carbon nanotubes having electrical properties, and excellent filtration performance, and adding a mixture of natural protein and carbon nanotubes to a support and drying to manufacture an air purifying filter, so the manufacturing method is simple, and an eco-friendly air purifying filter and its manufacturing method are provided using natural protein extracted from plants or animals.

Description

Air Purification filter and its manufacturing method

The present invention relates to an air purifying filter and a method for manufacturing the same, and more particularly, to an air purifying filter comprising a porous layer and a support including a carbon nanotube bound with a natural protein, wherein the carbon nanotube is mixed with a surfactant It relates to an air purifying filter for preparing a dispersion, mixing a natural protein and adding it on a support to form a porous layer, and a method for manufacturing the same.

In recent years, the air quality in Korea is rapidly deteriorating. Air pollutants generated as a result of rapid industrialization in China are landing in Korea with yellow dust, and the concentration of harmful heavy metals in Korea's atmosphere is exceeding the level of concern.

In such an environment, sales of air purifiers capable of purifying polluted air are increasing. Air purifiers currently in commercial use include various filters therein, and purify air by introducing the contaminated air and physically filtering or adsorbing and filtering out the contaminant particles through the filter.

As a filter used in these air purifiers, research is underway to form a nano-porous membrane on the membrane to filter out even ultra-fine dust. A method using carbon nanostructures has begun to be developed. The recently discovered carbon nanostructures can be divided into carbon nanotubes, carbon nanohorns, carbon nanofibers, graphene, and the like according to their shapes. In particular, carbon nanotubes can be applied to various fields such as energy, environment and electronic materials due to their excellent mechanical strength, thermal conductivity, electrical conductivity and chemical stability.

However, in the case of an air purifier using a filter, if the filter is contaminated by dust collection, the pressure loss increases and the amount of air flowing decreases, thereby reducing the ability to purify the air. Therefore, an air purifier using a filter must periodically clean the filter or replace the filter.

The prior art (Korean Patent No. 1583593, 2013.10.30) relates to a nanoporous membrane composed of a carbon nanostructure-metal composite or a carbon nanostructure-metal oxide composite and a method for manufacturing the same, and relates to a carbon nanostructure that does not include a support. A porous membrane is disclosed.

However, in the case of the prior art, it is difficult to manufacture because it is difficult to manufacture because it is necessary to perform a heat treatment at 80 to 350 ° C. to form a porous film of the carbon nanostructure-metal composite, and to perform an etching or dissolution process to remove the support. However, there is a problem in that environmental pollution occurs due to metal waste generated during the manufacturing process.

Korea Patent No. 1583593 (2013.10.30) Carbon nanostructure-metal composite or carbon nanostructure-metal oxide composite

The problem to be solved in the present invention is to solve the problems of the prior art, and a relatively simple process of mixing a natural protein containing hydrophobic and hydrophilic residues with carbon nanotubes, adding them on a support, and drying an air purifying filter is manufactured. It is to provide an eco-friendly air purifying filter that can be manufactured using a natural protein extracted from plants or animals, preferably banana peels, and a manufacturing method thereof, which can be manufactured with a simple manufacturing method.

In order to solve the above problems, the present invention is an air cleaning filter, comprising a porous layer and a support, wherein the porous layer is characterized in that it includes a carbon nanotube to which a natural protein is bound.

In addition, the natural protein is characterized in that it contains aromatic, aliphatic, cyclic, polar and amphiphilic amino acids as protein functional groups.

In addition, the aromatic amino acids include phenylalanine (Phe), histidine (His) and tyrosine (Tyr), and the aliphatic amino acids are glycine (Gly), alanine (Ala), valine (Val), isoleucine (Ile) and leucine ( Leu), wherein the cyclic amino acids include proline (Pro), and the polar and amphiphilic amino acids are asparagine and aspartic acid (Asx), glutamine and glutamic acid (Glx), serine (Ser), arginine (Arg) , threonine (Thr), lysine (Lys), characterized in that it comprises methionine (Met).

In addition, the dry air purifier according to another embodiment of the present invention is characterized in that it includes the air purifying filter.

In another embodiment of the present invention, in the method for manufacturing an air cleaning filter including a porous layer comprising natural protein and carbon nanotubes and a support, the carbon nanotube dispersion manufacturing step of mixing the carbon nanotubes with a surfactant And, a natural protein extraction step of extracting the natural protein from a plant or animal, a mixed solution preparation step of preparing a mixed solution by mixing the carbon nanotube dispersion and the natural protein, and a support preparation step of preparing the support by soaking the support in ultrapure water and a porous layer manufacturing step of adding the mixed solution on the support and drying the mixture to prepare the porous layer.

In addition, in the carbon nanotube dispersion preparation step, 0.5 to 1 mg of the carbon nanotube based on 1 ml of the surfactant is mixed to prepare the carbon nanotube dispersion.

In addition, the liquid mixture preparation step is characterized in that the mixture is prepared by mixing 0.25 to 1 mg of the natural protein with the carbon nanotube dispersion.

The air purifying filter according to the present invention is environmentally friendly because natural proteins can be extracted from plants or animals, preferably bananas, or banana peels.

Including a dry air purifier including an air purifying filter according to the present invention, indoor air can be purified using a filter, and the air purifying filter is PM1.0, PM2.5, PM10 by electrical dust collection of carbon nanotubes. can be effectively captured, and can be easily adsorbed and removed for TVOC, CO2, and airborne bacteria in addition to organic compounds in the air by the porous layer combined with natural proteins and carbon nanotubes.

The manufacturing method of the air purifying filter according to the present invention has an advantage in that the manufacturing method is simple since a mixture of natural protein and carbon nanotubes is added to the support and dried to manufacture the air purifying filter.

1 is a cross-sectional view and an actual photograph of an air cleaning filter according to the present invention.
2 is a view showing the functional group content of the natural protein of the air purifying filter according to the present invention.
3 is a graph showing the amino acid composition of the natural protein of the air purifying filter according to the present invention.
4 is a view schematically showing a dry air purifier including an air purifying filter according to an embodiment of the present invention.
FIG. 5 is a diagram schematically illustrating a notification unit shown in FIG. 4 .
6 is a view schematically showing the air cleaning unit shown in FIG.
FIG. 7 is a view schematically illustrating an air purification principle in a cross section of the air cleaning unit shown in FIG. 6 .
FIG. 8 is a diagram schematically illustrating an air quality measuring unit and a control unit shown in FIG. 4 .
9 is a view schematically showing another embodiment of the dry air purifier.
10 is a view schematically showing a method of manufacturing an air cleaning filter according to another embodiment of the present invention.
11 is a flowchart of a method of manufacturing the air purifying filter shown in FIG. 9 .

Hereinafter, an embodiment of an air cleaning filter and a method for manufacturing the same according to the present invention will be described with reference to the accompanying drawings. At this time, the present invention is not limited or limited by the examples. In addition, in describing the present invention, detailed descriptions of well-known functions or configurations may be omitted in order to clarify the gist of the present invention.

1 is a cross-sectional view and an actual photograph of an air cleaning filter according to the present invention, FIG. 2 is a view showing the functional group content of natural protein of the air cleaning filter according to the present invention, and FIG. 3 is a natural view of the air cleaning filter according to the present invention It is a graph showing the amino acid composition of the protein, FIG. 4 is a diagram schematically showing a dry air purifier including an air cleaning filter according to an embodiment of the present invention, and FIG. 5 is a diagram schematically showing the notification unit shown in FIG. 6 is a view schematically showing the air cleaning unit shown in FIG. 5 , FIG. 7 is a diagram schematically illustrating the air purification principle in a cross section of the air cleaning unit shown in FIG. 6 , and FIG. 8 is FIG. It is a view schematically showing the air quality measuring unit and the control unit shown in Fig. 9 is a view schematically showing another embodiment of the dry air purifier, and Fig. 10 is the manufacture of an air purifying filter according to another embodiment of the present invention It is a view schematically showing the method, and FIG. 11 is a flowchart of the method of manufacturing the air cleaning filter shown in FIG. 9 .

Referring to FIG. 1 , the air cleaning filter 10 according to the present invention may include a porous layer and a support.

First, referring to <a> and <b> of FIG. 1, the porous layer may be formed to a constant thickness on the support, and referring to <c> of FIG. 1, the porous layer has a plurality of pores. It can filter out foreign substances by passing solvents or air, and can include carbon nanotubes to which natural proteins are bound.

Here, the natural protein is a biological adhesive containing a plurality of hydrophobic and hydrophilic residues, which can facilitate the assembly and dispersion of the carbon nanotubes, thereby forming the porous layer, and the carbon nanotubes are carbon-based nanotubes. As a material, the structure is open so that electrostatic precipitation is possible, the adsorption of contaminants is easy, and it can be dispersed and assembled by the natural protein to form the porous layer, and single-walled carbon nanotubes (Single-Walled Carbon) NanoTube, SWNT), graphene oxide, multi-walled nanotube (MWNT), and the like.

The support is a membrane membrane having uniform micropores on the membrane, and supports the porous layer and can filter solvent or air double, nylon, polyester, polypropylene, polypropylene It may include polyimide, polyamideimide, polyurethane, polystyrene, polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), and the like.

2 and 3 , the natural protein may include aromatic, aliphatic, cyclic, polar and amphiphilic functional groups.

The aromatic functional group accounts for 8.5% of the natural protein, is an amino acid containing a benzene ring, and may include phenylalanine (Phe), histidine (His) and tyrosine (Tyr), and hydrophobic interaction between hydrophobic polymer chains It can be combined with the carbon nanotubes through the π-π stacking interaction stacked side by side by the , thereby facilitating protein adsorption on the surface of the carbon nanotubes.

The aliphatic functional group accounts for 41.7% of the natural protein and is an amino acid having an open ring structure, and includes glycine (Gly), alanine (Ala), valine (Val), isoleucine (Ile) and leucine (Leu). and the cyclic amino acid accounts for 6.1% of the natural protein, and is an amino acid having primary and secondary amino groups of a cyclic structure instead of an amino group, and may include proline (Pro), and the aliphatic and The click amino acid may cause a hydrophobic interaction between the carbon nanotube and the native protein to reduce interfacial energy.

The polar and amphiphilic functional groups account for 43.7% of the natural protein, and are amino acids having polar alcohol groups, thiol groups, and amide groups, asparagine and aspartic acid (Asx), glutamine and glutamic acid (Glx), serine ( Ser), arginine (Arg), threonine (Thr), lysine (Lys), and methionine (Met), wherein the hydrophobic side chain of the polar and amphiphilic amino acids is strongly bound to the carbon nanotube, and the hydrophilic side chain is Because it faces the surrounding aqueous solution, it exhibits a behavior similar to that of a surfactant, whereby the natural protein and carbon nanotube conjugate can be dispersed to provide an ionic environment.

Here, the natural protein may be a protein derived from a plant or animal, and preferably may be extracted from a banana or banana peel.

For example, collect mesothelial tissue from banana peel using a spatula, transfer to a 90-mm Petri dish, freeze-dried at -85 °C and 15 mTorr for 2 days, and manually grind the lyophilized mesothelial tissue into a powder, , the modified trichloroacetic acid (TCA)-acetone precipitation method can extract the natural protein, and in the case of banana peel, the waste generated after banana processing and consumption can be reused, so that the natural protein is environmentally friendly. You can consume protein.

In addition, the air purifying filter 10 formed by carbon nanotubes combined with the natural protein can effectively collect PM1.0, PM2.5, and PM10 by electrical dust collection of the carbon nanotubes, and the aromatic, By the porous layer to which the natural protein containing aliphatic, cyclic, polar and amphiphilic functional groups and the carbon nanotubes are bonded, it can be easily adsorbed and removed for TVOC, CO2, and airborne bacteria in addition to organic compounds in the air. have.

Referring to FIG. 4 , as another embodiment of the present invention, the dry air purifier 20 including the air purifying filter 10 includes a notification unit 100 , an air purifier 200 , an air quality measurement unit 300 and A control unit 400 may be included.

The notification unit 100 is provided with a lighting decoration 110 and is located at the top of the dry air purifier 20, and an air intake 121 is provided to suck outside air and supply it to the air purifier 200. , It is possible to change the color of the lighting decoration 110 according to the air quality measurement of the air quality measurement unit 300, and the lighting decoration 110 has various shapes with a space therein, such as a snowball. In addition to color change, it is possible to express indoor air quality through various motions.

The air cleaning unit 200 is connected to the lower end of the notification unit 100 to support the notification unit 100, accommodate the air cleaning filter 10, and accommodate the suction fan 220 therein to notify the notification. External air may be sucked in through the air inlet 121 of the unit 100 to be purified and discharged by the air cleaning filter 10 .

The air quality measuring unit 300 is connected to the lower end of the air purifying unit 200 to support the air purifying unit 200, and by accommodating sensors such as a fine dust sensor, gas, airborne bacteria, temperature, and humidity therein. Air quality can be measured.

The control unit 400 is connected to the lower end of the air quality measurement unit 300 to support the air quality measurement unit 300 and accommodate the power module therein to provide the notification unit 100, the air cleaning unit 200 and the air quality. It is possible to supply power to the measurement unit 300, and by accommodating Bluetooth, Wi-Fi and wired communication modules to collect outdoor/indoor air quality information through communication with the server, the notification unit 100, the air purifier 200 and the air quality The measurement unit 300 may be controlled.

Referring to FIG. 5 , the notification unit 100 may include a support 120 and a support bracket 130 .

The support 120 is provided with a decorative coupling part 122 in the center so that it can be coupled to the lower end of the lighting decoration 110 , and is coupled between the lower end of the lighting decoration 110 and the decorative coupling part 122 . It may further include a decorative bracket 111 for supporting the lighting decoration 110, the lighting decoration 110 by the combination of the lighting decoration 110, the decorative bracket 111 and the decorative coupling part 122 is the It may be supported from the support 120 , and the support 120 is provided with an air intake 121 radially along the circumference of the central decorative coupling part 122 , so that external air is sucked into the air cleaning part 200 . A plurality of support connecting portions 123 may be formed on the lower surface of the support 120 to be coupled to the support bracket 130 by a connecting member (not shown).

The support bracket 130 may be coupled to the lower surface of the support 120 and connected to the upper surface of the air cleaning unit 200 , and a notification unit air passage hole 131 is provided in the center so that the air intake port 121 is sucked. air may pass through and be introduced into the air cleaning unit 200 .

In addition, the support bracket 130 includes a notification unit connection part 132 extending to the lower end of a certain length along the circumference of the notification unit air passage hole 131 and an inner film radially formed inside the notification unit connection unit 132 ( 133) may be further included, and the notification unit connection unit 132 may be coupled to the upper surface of the air purifier 200 , the air quality measurement unit 300 or the control unit 400 , so that the dry air purifier 20 is installed. It can be assembled in various forms, and the inner film 133 can support the decorative coupling part 122 coupled to the lighting decoration 110 in the support 120 at the lower end, and the support bracket 130 . A plurality of support bracket connection parts 134 are formed on the upper surface and may be coupled to the support connection part 123 by a connection member (not shown), and a notification unit power connection part 135 at one end of the upper surface of the support bracket 130 . is provided so as to receive current from the control unit 400 and supply power to the lighting decoration 110 by coupling with the support 120 , and a detachable fixing part 136 on the other end of the upper surface of the support bracket 130 . ) is provided so that it can be detached from the upper surface of the air purifier 200, the air quality measurement unit 300, or the control unit 400, so that the dry air purifier 20 can be assembled in various forms.

6 and 7 , the air cleaning unit 200 may include a clean floating plate 210 , a clean load housing 220 , a suction fan 230 , and a clean load plate 240 .

The clean floating plate 210 is provided with a clean floating plate air passage hole 211 in the center, so that air introduced through the notification unit air passage hole 131 can be introduced into the air cleaning unit 200, and , a cleaning part coupling part 212 extending to the lower end of a certain length along the circumference of the cleaning part top plate air passage hole 211 is provided so that the notification part connection part 132 is inserted and coupled to support the notification part 100 A top plate detachable part 213 detachable from the clean part housing 220 is provided at the end of the clean floating plate 210 to detach and attach the clean floating plate 210 to the air cleaning filter (10). can be replaced

The cleaning unit housing 220 is provided with the cleaning floating plate 210 is coupled to the upper end, the discharge hole 221 is provided on the side, and the filter support 222 formed in a radial shape is provided inside the air cleaning filter ( 10) can be accommodated and supported, and the suction fan 230 is provided under the filter support 222 to pass the outside air through the air cleaning filter 10 to purify it and to purify it through the discharge hole 221 . The exhausted air can be expelled.

Here, a cleaning unit power connection part 223 is provided at one end of the cleaning unit housing 220 to receive current from the control unit 400 to operate the suction fan 230, and the cleaning unit power connection unit ( 223), the current of the control unit 400 may be transmitted to the notification unit 100 or the air quality measurement unit 300 connected to the top surface of the air cleaning unit 200, and the other side of the top surface of the cleaning unit housing 220 A detachable part 224 is provided at the end so that the air purifier 200 can be separated from the dry air purifier 20 and assembled in various forms, and a clean load plate connection part ( 225) is provided and may be coupled to the clean load plate 240 by a connecting member (not shown).

The suction fan 230 is provided inside the cleaning unit housing 220 and is located below the filter 10 , and external air through the air passage hole 211 of the clean floating plate 210 is provided. may be sucked in and passed through the air cleaning filter 10 to be purified, and the purified air may be discharged through the discharge hole 221 .

The clean load plate 240 is provided with a clean load plate air passage hole 241 in the center, through which purified air can pass, and extends to the lower end of a certain length along the circumference of the clean load plate air passage hole 241 A cleaning unit connection part 242 may be provided and coupled to the upper surface of the air quality measuring unit 300 or the control unit 400, or a plurality of the air cleaning units 200 may be vertically coupled, and the cleaning load plate 240 A plurality of housing connection parts 243 are formed on the upper surface of the , and may be coupled to the clean load plate connection part 225 by a connection member (not shown).

Here, the clean part top plate 210 and the clean load plate 240 further include a clean part power connection part 223, a power connection part hole 214, and a power coupling hole 244 of the clean load housing 220. The cleaning unit power connection unit 223 is connected to the power of the control unit 400 to supply current to the notification unit 100 or the air quality measurement unit 300 , and a detachable unit 224 of the cleaning unit housing 220 . ) by further including a detachable part hole 215 and a detachable part coupling hole 245 at a position corresponding to the detachable part, the air cleaning part 200 can be detached and combined in various forms.

Here, referring to FIG. 7 , the notification unit connection unit 132 of the notification unit 100 is inserted and coupled to the clean unit coupling unit 212 of the air cleaning unit 200 , and the cleaner unit coupling unit 212 lower end In the case where the air cleaning filter 10 is supported by the filter support 222 and positioned, the suction fan 230 is positioned at the lower end of the filter support 222, and the suction fan 230 operates, External air is sucked in through the air intake 121 of the notification unit 100, passes through the notification unit air passage 131 of the support bracket 130, passes through the air cleaning filter 10, and the air The purified air may be discharged through the discharge hole 221 of the cleaning unit 200 .

Referring to FIG. 8 , the air quality measuring unit 300 includes a measuring part upper plate 310 and a measuring part housing 320 , and the controller 400 includes a control part upper plate 410 and a control part lower plate 420 . can do.

The measuring part upper plate 310 is provided with a measuring part upper plate air passage hole 311 in the center so that the incoming air can be introduced into the air quality measuring part 300, and the measuring part upper plate air passage hole 311 is provided. A measuring part coupling part 312 extending to the lower end of a certain length along the circumference is provided so that the cleaning part connection part 242 is inserted and coupled to support the air cleaning part, and a plurality of the measuring part upper plate 310 is provided on the lower surface. A measuring load plate connection part 313 is provided and may be coupled to the measuring load plate 320 by a connecting member (not shown).

The measuring unit housing 320 has the upper end of the measuring unit top plate 310 coupled thereto, a measuring hole 321 is provided on the side thereof, and an air quality measuring sensor (not shown) inside the measuring unit housing 320 . It can be accommodated, and the air quality measuring sensor is located right in front of the measuring hole 321 to measure the air quality of the outside air.

Here, the lower surface of the measuring part housing 320 is provided with a measuring part air passage hole 322 in the center, and a measuring part connection part 323 extending to the lower end of a certain length along the circumference of the measuring part air passage hole 322 is provided and coupled to the upper surface of the air purifying unit 200 or the control unit 400, or a plurality of the air quality measuring units 300 may be vertically coupled, and when coupled to the upper surface of the air purifying unit 200, the External air sucked by the operation of the suction fan 230 may pass through the air quality measurement unit 300 and be supplied to the air cleaning unit 200 , and when coupled to the upper surface of the control unit 400 , the air quality measurement is performed. The air cleaning unit 200 is coupled to the upper surface of the unit 300 so that the air purified by the suction fan 230 is discharged to the discharge hole 221 or discharged to the measurement hole of the air quality measurement unit 300 . can be

In addition, the measuring unit housing 320 is provided with a measuring unit power connection part 324 at one end to receive current from the control unit 400 and the notification unit 100 connected to the upper surface of the air quality measuring unit 300 or The current can be supplied to the air cleaning unit 200, or by further including an LED, an electric sign, etc. inside the measuring unit housing 320, and the measuring unit housing 320, the other end of the measuring unit detachable part 325 is provided so that the air quality measuring unit 300 can be separated from the dry air purifier 20 and assembled in various forms, and a plurality of measuring part upper plate connection parts 326 are provided inside the measuring load plate 320, so that the It may be combined with the measuring plate 310 .

Again, referring to FIG. 8 , the control top plate 410 includes a control coupling part 411 in which a central part is formed to be a predetermined height lower than an edge part, and the notification part connection part 132 of the notification part 100, the air It is coupled with the clean part connection part 242 of the cleaning part 200 or the measurement part connection part 323 of the air quality measurement part 300 to supply current, and a control part detachable part 412 at one end of the control part top plate 410 ) is provided and the notification unit 100, the air purifier 200, or the air quality measurement unit 300 coupled to the control unit 400 can be detached, and the control unit top plate 410 has a power supply unit ( 413) is provided to supply current to the notification unit power connection unit 135, the clean unit power connection unit 223 or the measurement unit power connection unit 324, and the control unit top plate 410 has an external power connection unit 414 on the side. is provided and can receive current from the outside by connecting an external power line such as a micro 5-pin, a Lightning 8-pin, a USB-C or an adapter, and a plurality of lower plate connection parts (not shown) are provided inside the control unit upper plate 410 . Thus, it is coupled with the control lower plate 420 to accommodate a power module, a wireless communication module, etc. in the inner space.

The control lower plate 420 is coupled to the lower end of the control upper plate 410 to support the dry air purifier 20, and includes a plurality of upper plate connection parts 421 to connect the lower plate connection part (not shown) and a connecting member (not shown). ) to support the power module and wireless communication module, and support the dry air purifier 20 .

Referring to FIG. 9 , the dry air purifier 20 according to another embodiment of the present invention may be assembled including a plurality of each of the air purifier 200 and the air quality measurement unit 300 .

For example, referring to FIG. 9A , the dry air purifier 20 includes one each of the notification unit 100 , the air quality measurement unit 300 , and the control unit 400 , and the air purifier 20 includes one each. Two governments 200 may be included.

The two air purifying units 200 are vertically connected to the lower end of the notification unit 100 , the air quality measuring unit 300 is connected to the lower end of the air purifying unit 200 , and the air quality measuring unit 300 is connected to the lower end of the notification unit 100 . ) The control unit 400 is connected to the bottom so that the dry air purifier 20 can be assembled, and when the air quality measurement unit 300 detects air purification higher than the reference concentration, the power module of the control unit 400 This current is supplied to operate the suction fan 230 of the dry air purifier 20, and external air is sucked into the air purifier 200 through the notification unit 100, and the suctioned external air is It is discharged through each of the air cleaning unit 200, it is possible to improve the purification efficiency.

Also, referring to FIG. 9B , the dry air purifier 20 includes the notification unit 100, the air purifier 200 and the control unit 400, one each, and the air quality measurement unit ( 300) may be included.

The two air quality measuring units 300 are vertically connected to the lower end of the notification unit 100 , and the air purifying unit 200 is connected to the lower end of the air quality measuring unit 300 , and the air purifying unit 200 is connected to the lower end of the air quality measuring unit 300 . ) The control unit 400 is connected to the lower end so that the dry air purifier 20 can be assembled. When the air quality measurement unit 300 detects air purification higher than the reference concentration, the control unit 400 controls the current. supply to operate the suction fan 230 of the dry air purifier 20 , and external air passes through the air quality measurement unit 300 through the notification unit 100 and flows into the air purifier 200 , , the air purifying unit 200 purifies the outside air through the air purifying filter 10 , and the air quality measuring unit 300 changes the air purifying concentration of the outside air sucked by the air purifying unit 200 . can be detected in real time, so that the control unit 400 controls the suction fan operation time of the air purifier 200 according to a change in the air purifying concentration to efficiently operate the dry air purifier 20 .

The air purifying filter 10 according to the present invention and the dry air purifier 20 including the same have been described above. Hereinafter, a filter manufacturing method according to another embodiment of the present invention will be described.

First, FIG. 10 schematically shows a method for manufacturing an air purifying filter. When carbon nanotubes and natural proteins are mixed and added to a support moistened with deionized water, water and ions pass through the support, and carbon nanotubes and natural proteins are It is filtered from the support and the carbon nanotubes are attached to the natural protein to form a large area and form a porous layer.

Referring to FIG. 11 , the filter manufacturing method including a porous layer containing natural protein and carbon nanotubes and a support is a carbon nanotube dispersion preparation step, a natural protein extraction step, a mixed solution preparation step, a support preparation step, and a porous layer production step may include.

The carbon nanotube dispersion preparation step is a step of preparing a dispersion by mixing the carbon nanotubes with a surfactant, wherein the carbon nanotubes are single-walled carbon nanotubes (SWNT), graphene oxide (Graphite) oxide), multi-walled nanotube (MWNT), and the like, and the surfactant is sodium cholate hydrate, sodium dodecyl benzene sulfonate, dodecyl sulfate. It may contain sodium (sodium dodecyl sulfate) and the like, and in an embodiment of the present invention, the carbon nanotube may be a single-walled carbon nanotube (SWNT), and the surfactant is sodium cholate hydrate. (Sodium cholate hydrate) may be, the sodium cholate hydrate (Sodium cholate hydrate) may be used as an anionic reducing agent in aqueous solution.

Here, the carbon nanotube dispersion may be prepared by mixing 0.5 to 1 mg of the carbon nanotube based on 1 ml of the surfactant.

For example, when sodium cholate hydrate is used as the surfactant, 0.5 to 1 mg of the carbon nanotubes are aliquoted in 0.5 ml of 2% sodium cholate hydrate and mixed, and the buffer is exchanged. To stabilize the carbon nanotube, mix the buffer-exchanged carbon nanotube solution with 0.5ml of 5% sodium cholate hydrate in a 15ml tube to increase the dispersing power of the carbon nanotube solution to prepare a carbon nanotube dispersion can do.

The natural protein extraction step is a step of extracting the natural protein from a plant or animal, and in one embodiment of the present invention, the natural protein may be a plant, more preferably a banana or banana peel, first, a banana The mesothelial tissue is collected from the shell using a spatula, transferred to a 90-mm Petri dish, and freeze-dried at -85°C and 15 mTorr for 2 days. The natural protein can be extracted through the protein precipitation step of extracting the protein using the trichloroacetic acid (TCA)-acetone precipitation method.

Here, in the protein extraction step, the freeze-dried mesothelial tissue is ground into a powder, and 0.5 g of 10-mL extraction buffer (2% sodium dodecyl sulfate (SDS), 60 mM dithiothreitol (DTT) ), suspension in 20% glycerol and 40 mM Tris-HCl pH 8.5), and heating at 95°C for 8 minutes. After incubating the buffer mixture, centrifuge at 8,000 × g for 15 minutes at 4°C cooling. Centrifugation step to separate, transfer 500 μl of the centrifuged supernatant of the buffer mixture to a 2 ml tube, and ice-cooled 1.4 mL containing 10% trichloroacetic acid (TCA) and 20 mM dithiothreitol (DTT) TCA-acetone addition step in which acetone is added to the tube, protein is precipitated by incubation at -20 ° C for 1 hour, and protein is collected by centrifugation at 18,000 × g for 10 minutes at -7 ° C. Protein collection step, collected A final centrifugation step in which the protein is washed using ice-cold acetone supplemented with 20 mM DTT, precipitated at -20°C for 60 minutes and centrifuged at 20,000 × g and -7°C for 10 minutes, the protein is air-conditioned for 3 minutes It may further include a protein drying step of drying and storing at -20°C, so that the natural protein can be extracted.

The mixed solution preparation step is a step of mixing the carbon nanotube dispersion with the natural protein, and 0.25 to 1 mg of the extracted natural protein is aliquoted and mixed in the tube containing the carbon nanotube dispersion, and static culture at room temperature for one day to prepare a mixed solution.

The support preparation step is a step of preparing the support by soaking the support in ultrapure water, and the support is a membrane layer having uniform micropores on the membrane, supporting the porous layer and double filtering the solvent or air, and the mixed solution It may be dispersed along the support to form the porous layer, and the support may preferably have a circular diameter of 50 mm, and when the support exceeds 50 mm in diameter, the mixed solution is thinly dispersed and the porous The layer is formed thin and easily damaged and the filtration performance is deteriorated, and when the diameter of the support is less than 50 mm, the mixed solution is dispersed thickly and the porous layer is formed thickly, so that the air permeability is lowered, and the purification efficiency may be reduced.

Here, the size of the support can be determined based on the carbon nanotube dispersion of the mixed solution, that is, the carbon nanotube dispersion mixed with 0.5 to 1 mg of the carbon nanotube based on 1 ml of the surfactant. When the mixture is prepared by mixing with 0.25 to 1 mg of protein, it may be preferable that the support has a diameter of 50 mm.

In addition, the support is nylon (Nylon), polyester (Polyester), polypropylene (Polypropylene), polyimide (Polyimide), polyamideimide (Polyamideimide), polyurethane (Polyurethane), polystyrene (Polystyrene), polyvinylidene fluoride It may include fluoride (PVDF), polytetrafluoroethylene (PTFE), etc., and the ultrapure water is pure water in which electrical conductivity, number of solid fine particles, number of viable cells, organic matter, etc. are suppressed to extremely low values, DNase, RNase, It may include deionized water from which protease has been removed, so that the support may maintain a low ion concentration.

The porous layer manufacturing step is a step of preparing the porous layer by adding the mixed solution on the support and drying it. When the mixed solution is added on the support having a low ion concentration by soaking in the ultrapure water, the ion concentration difference The ions of the mixed solution can be dispersed while moving slowly toward the support to form a large surface area, and the mixed solution is uniformly dispersed on the support by static culture for one day. The air cleaning filter comprising the porous layer of a uniform thickness can be manufactured.

Although the preferred embodiment of the present invention has been described with reference to the drawings as described above, those of ordinary skill in the art will present the present invention within the scope not departing from the spirit and scope of the present invention as set forth in the claims below. can be modified or changed in various ways.

10: air cleaning filter
20: dry air purifier
100: notification unit
110: lighting decoration
120: support
130: support bracket
131: notification part air passage
132: notification unit connection part
133: inner film
134: support bracket connection part
135: notification unit power connector
136: detachable and fixed part
200: air cleaner
210: clean floating plate
211: clean floating plate air passage
212: clean part coupling part
213: upper plate detachable part
214: power connection hole
215: detachable part hole
220: clean load housing
221: discharge hole
222: filter support
223: clean part power connection part
224: detachable part
225: clean load plate connection part
230: suction fan
240: clean load plate
241: clean load plate air passage
242: clean part connection part
243: housing connection part
244: power coupling hole
245: detachable part coupling hole
300: air quality measurement unit
310: measuring plate
311: air passage hole for measuring float plate
312: measuring part coupling part
313: measuring load plate connection part
320: measuring load plate
321: measurement hole
322: measurement part air passage port
323: measurement part connection part
324: measurement part power connection part
325: measuring part detachable part
326: measuring part upper plate connection part
400: control unit
410: control panel top
411: control unit coupling unit
412: control unit detachable part
413: power supply
414: external power connection part
420: control unit lower plate
421: upper plate connection part
S100: carbon nanotube dispersion manufacturing step
S200; Natural protein extraction step
S300: mixed solution manufacturing step
S400: support preparation step
S500: porous layer manufacturing step

Claims (7)

porous layer; and
comprising a support;
The porous layer includes carbon nanotubes to which natural proteins extracted from bananas or banana peels are bound,
The natural protein extracted from the banana or banana peel is an air purifying filter, characterized in that it contains aromatic, aliphatic, cyclic, polar and amphiphilic amino acids as protein functional groups. delete The method of claim 1,
The aromatic amino acid is
phenylalanine (Phe), histidine (His) and tyrosine (Tyr);
The aliphatic amino acid is
glycine (Gly), alanine (Ala), valine (Val), isoleucine (Ile) and leucine (Leu);
The cyclic amino acid is
Contains proline (Pro),
The polar and amphiphilic amino acids are
Air cleaning filter comprising asparagine and aspartic acid (Asx), glutamine and glutamic acid (Glx), serine (Ser), arginine (Arg), threonine (Thr), lysine (Lys), and methionine (Met). A dry air purifier comprising the air purifying filter of claim 1 . In the method for manufacturing an air cleaning filter comprising a porous layer comprising a natural protein and carbon nanotubes extracted from banana or banana peel, and a support,
a carbon nanotube dispersion preparation step of mixing the carbon nanotube with a surfactant;
A natural protein extraction step of extracting the natural protein from a banana or banana peel;
a mixed solution preparation step of preparing a mixed solution by mixing the carbon nanotube dispersion with the natural protein;
a support preparation step of preparing the support by immersing it in ultrapure water;
A porous layer manufacturing step of adding the mixed solution on the support and drying to prepare the porous layer,
In the natural protein extraction step,
The extracted natural protein is a natural protein extracted from banana or banana peel, and the method for manufacturing an air purifying filter, characterized in that it simultaneously contains aromatic, aliphatic, cyclic, polar and amphiphilic amino acids as protein functional groups. 6. The method of claim 5,
In the carbon nanotube dispersion preparation step,
A method for manufacturing an air cleaning filter, characterized in that the carbon nanotube dispersion is prepared by mixing 0.5 to 1 mg of the carbon nanotube based on 1 ml of the surfactant. 6. The method of claim 5,
The mixed solution preparation step is,
A method for manufacturing an air cleaning filter, characterized in that the mixture is prepared by mixing 0.25 to 1 mg of the natural protein with the carbon nanotube dispersion.

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