KR20210092354A - Particular matters filter system using metal micro fibers and electric field - Google Patents

Abstract

A micro particle dust collecting system using metal micro fiber and an electric field according to one embodiment of the present invention comprises: a main body part which has an inlet part and an outlet part where micro particles are introduced and discharged; a metal plated fiber mat which is arranged in the main body part and electrically charges micro particles introduced through the inlet part; and a polymer fiber mat which is spaced to be arranged at an upper part of the metal plated fiber mat and provides repulsive force to the charged micro particles. According to the present invention, power required for driving the system can be minimized.

Description

Fine particle dust collection system using metal microfiber and electric field {PARTICULAR MATTERS FILTER SYSTEM USING METAL MICRO FIBERS AND ELECTRIC FIELD}

The present invention relates to a system for collecting fine dust using metal microfibers and an electric field.

Recently, numerous companies and schools are developing various types of filter materials, and efforts are being made to develop filters that capture particles smaller than those that can be filtered by high-efficiency particulate air (HEPA) filters.

In addition, research using non-woven fabric is being conducted to develop the above-mentioned filter, and Welcron manufactured a non-woven fabric by complex spinning multi-component polymer meltblown, which is 15-20% cheaper than glass fiber, and A filter having a size of 120 nm and showing a collection efficiency of 99.9% was prepared.

In addition, Virin Korea has developed a product capable of filtering particles with a size of 100 to 500 nm by developing an ultrafine fiber layer/activated carbon layer made of non-woven fabric to which electrostatic force is imparted.

Such a filter material for filtering various types of fine particles has a condition that has a large specific surface area and an appropriate pore size. However, there is no commercial fibrous material with a diameter of 0.25 μm or less for a non-woven depth filter, and a sub-micron fibrous non-woven support suffers from high pressure loss and pore occlusion problems, and even in the case of a 0.2 μm media filter, a large size containing bacteria Although it shows high filtration efficiency for particles, small particles such as colloids, endotoxins, viruses, etc. are not filtered and are permeated as they are, but disadvantages are exposed.

Accordingly, various research teams are developing positive charge filter material technology by electrokinetic adsorption to overcome this problem. Algonide, a US company, developed and commercialized a new positive charge filter called nanoceram in which nano-alumina with a diameter of 1-2 nm and a length of several hundred nm was combined with silica microfibers with a diameter of about 600 nm. In addition, the AAO template has recently been active in the development of silica nanofibers, mesoporous silica nanofibers and silica nanotubes using cationic surfactants and self-assembly, and silica nanofibers with high specific surface area have been successfully synthesized, but the The length is up to several millimeters, and the synthesis time is very long, so it is closer to an academic aspect than a practical aspect.

In order to overcome this problem, the present invention intends to increase the adsorption effect by applying a voltage to enable adsorption of even tens of nm-class particles. For the metal microfiber filter to which voltage is applied, the time required for fabrication is very short because the process of fabricating PAN nanofibers with a diameter of several hundred nm is very simple. Therefore, it can be said that it is very excellent not only for academic value but also for commercial use.

In addition, the filter using the metal microfibers can be manufactured to be very thin compared to the non-woven depth filter, and since the porosity is excellent, the pressure loss before and after the filter can be greatly reduced. Pressure loss is a factor that is receiving the most attention along with filtration efficiency in the field of filter research.

Lastly, in the case of a filter having a structure that does not apply voltage, there are particle sizes in a range that does not filter properly depending on the size of the filter pore size. The collection efficiency of particles between small-sized particles decreases.

However, when a voltage is applied, a relatively strong electrostatic field is formed, and the collection efficiency of particles having a size of an intermediate region can be improved.

Embodiments of the present invention are proposed to solve the above problems, and can adsorb fine particles of 1 μm or less that commercial HEPA filters cannot adsorb, can be reused semi-permanently, and power consumption required for operation We aim to provide a fine particle dust collection system using metal microfibers and electric fields that can minimize

A system for collecting fine particles according to an embodiment of the present invention includes: a main body formed with an inlet and an outlet through which fine particles flow in and out; Doedoe disposed inside the main body, a metal-plated fiber mat for electrically charging the fine particles flowing in from the inlet; and a polymer fiber mat that is spaced apart from the upper portion of the metal-plated fiber mat and provides a repulsive force to the charged fine particles.

In addition, the upper and lower portions of the main body communicate with each other to have an inner space, and the inner space includes a first space formed between the inlet and the metal-plated fiber mat, and between the metal-plated fiber mat and the polymer fiber mat. and a second space formed therein and a third space formed between the polymer fiber mat and the discharge part.

In addition, the polymer fiber mat may include polymer nanofibers prepared by electrospinning a polymer solution in which dimethylformamide (DMF) is added to polyacrylonitrile (PAN).

In addition, the polyacrylonitrile (PAN) is 1 to 15 parts by weight based on 100 parts by weight of the polymer solution.

In addition, the polymer fiber mat may be formed in the form of a net by transferring the polymer nanofibers onto a substrate.

In addition, the metal-plated fiber mat is formed by depositing a conductive material on the surface of the polymer fiber mat, and then coating the metallic material with an electroplating method.

In addition, the metal-plated fiber mat may include metal microfibers having a diameter of 2 to 5 μm.

In addition, the metal-plated fiber mat receives a voltage from an external power source to generate an electric field between the second space and the third space, and is charged with a (+) pole or a (-) pole.

In addition, when a voltage is applied to the metal-plated fiber mat, the fine particles in the first space pass through the charged metal-plated fiber mat and move to the second space while interacting with the charged metal-plated fiber mat through a polarization reaction. The fine particles charged to the other pole and charged in the second space may be adsorbed to and removed from the metal-plated fiber mat while moving in the direction facing the inlet by the repulsive force of the polymer fiber mat.

In addition, the polymer fiber mat is electrically grounded so as to have a potential equal to that of the external ground.

The fine particle dust collection system using metal microfibers and electric field according to embodiments of the present invention can adsorb fine particles of 1 μm or less that commercial HEPA filters cannot adsorb, can be reused semi-permanently, and can be driven The required power consumption can be minimized.

1 is a schematic configuration diagram of a system for collecting fine particles using metal microfibers and an electric field according to an embodiment of the present invention.
2 is a view for explaining the polarization phenomenon of the fine particles according to an embodiment of the present invention.
3 is a view for explaining the manufacturing process of the polymer fiber mat and the metal-plated fiber mat of the fine particle dust collecting system using metal microfibers and an electric field according to an embodiment of the present invention.
4 is a view showing a fine particle dust collecting system using metal microfibers and an electric field and a fiber mat constituting the fine particle dust collecting system according to an embodiment of the present invention.
5 is an SEM image showing copper microfibers according to an electroplating time according to an embodiment of the present invention.
6 is a graph showing the change in CO concentration according to the electroplating time (a), the position of the PAN fiber mat (b), and the number of copper-plated fiber mats (c) according to an embodiment of the present invention.
7 is a graph showing the fine particle collection efficiency according to whether the copper-plated fiber mat according to an embodiment of the present invention (a) and the size of the fine particles (b).
8 is a copper-plated fiber mat before (a), after a soft type fine particle filtration test (b), after DMF immersion (c), and after ultrasonic treatment (d) according to an embodiment of the present invention; SEM image.
9 is an SEM image of a copper-plated fiber mat before and after a solid type fine particle filtration test according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Examples of the present invention are provided to more completely explain the present invention to those of ordinary skill in the art, and the following examples may be modified in various other forms, and the scope of the present invention is as follows It is not limited to an Example.

Rather, these examples are provided so that this disclosure will be more thorough and complete, and will fully convey the spirit of the invention to those skilled in the art.

In addition, in the following drawings, each component is exaggerated for convenience and clarity of description, and the same reference numerals refer to the same elements in the drawings. As used herein, the term “and/or” includes any one and all combinations of one or more of those listed items.

The terminology used herein is used to describe specific embodiments, not to limit the present invention.

As used herein, the singular forms may include the plural forms unless the context clearly dictates otherwise. Also, as used herein, “comprise” and/or “comprising” refers to the presence of the recited shapes, numbers, steps, actions, members, elements, and/or groups of those specified. will,

It does not exclude the presence or addition of one or more other shapes, numbers, movements, members, elements and/or groups.

1 is a schematic configuration diagram of a system for collecting fine particles using metal microfibers and an electric field according to an embodiment of the present invention.

Referring to FIG. 1 , a fine particle dust collection system 10 using metal microfibers and an electric field according to an embodiment of the present invention is a fine particle 1 containing particulate matter (PM) contained in the air. ) as being able to be processed through voltage application, and includes a body part 100 , a metal-plated fiber mat 200 , and a polymer fiber mat 300 .

The fine particles 1 may include harmful gas, such as carbon monoxide, as well as include harmful particle matter (PM, particulate matter).

The body part 100 serves as a main frame of the fine particle dust collecting system 10 using metal microfibers and an electric field according to an embodiment of the present invention, and the inlet 110 into which the fine particles 1 are introduced. , it may include an internal space 130 that provides a path so that the discharge part 120 through which the fine particles 1 are discharged and the fine particles 1 can flow.

Here, the body portion 100 may have a cylindrical structure in which the upper and lower portions are communicated to have the inner space 130, but is not limited thereto as long as it can provide a path for the fine particles 1 to flow. .

In addition, the inner space 130 of the main body 100 is a first space formed between the inlet 110 and the metal-plated fiber mat 200, the metal-plated fiber mat 200 and the polymer fiber mat 300. A second space formed therebetween and a third space formed between the polymer fiber mat and the discharge unit 120 may be included.

Specifically, the neutral fine particles 1 flow in the first space adjacent to the inlet 110, and the fine particles 1 charged due to polarization flow in the second space, and the third Air treated with the fine particles 1 may flow in the space.

The metal plating fiber mat 200 is disposed inside the body part 100, and receives the fine particles 1 flowing in through the inlet 110, and uses the polarization phenomenon to convert the fine particles 1 (+) It can be charged to have either a ) pole or a (-) pole.

Specifically, the metal-plated fiber mat 200 may generate an electric field between the second space and the third space by receiving a voltage from an external power source, and at this time, it is charged with a (+) pole or a (-) pole do.

Accordingly, the metal-plated fiber mat 200 supplies a charge having either a (+) pole or a (-) pole so that the fine particles 1 passing through the metal-plated fibrous mat 200 as a whole (+) It can be charged to have either polarity of ) pole or (-) pole.

The metal plated fiber mat 200 of the fine particle dust collection system 10 using metal microfibers and an electric field according to an embodiment of the present invention may be composed of metal microfibers 210 having a diameter of 2 to 5 μm. However, it is not limited thereto.

On the other hand, a voltage applying device that is electrically connected to the metal-plated fiber mat 200 and supplies a voltage so that electric charges having either polarity of (+) or (-) pole are discharged from the metal-plated fiber mat 200 . It may further include, but is not limited thereto.

The polymer fiber mat 300 is spaced apart from the upper portion of the metal-plated fiber mat 200 , and may provide a repulsive force to the charged fine particles.

In addition, the polymer fiber mat 300 may be disposed on the upper portion of the metal-plated fiber mat 200 to have at least one predetermined separation distance.

For example, as shown in FIG. 1 , the polymer fiber mat 300 may be disposed at a position (Middle) moved by a preset separation distance upward from the metal plated fiber mat 200, the position It may be disposed at a position (Top) moved by half of the preset separation distance in the upper direction with respect to (Middle). In addition, the polymer fiber mat 300 may be disposed at a position (Bottom) moved by half of the preset separation distance in the lower direction based on the position (Middle).

In addition, the polymer fiber mat 300 is electrically grounded so as to have the same potential as the external ground.

The polymer fiber mat 300 according to an embodiment of the present invention may have a relatively negative (-) pole compared to the charged metal-plated fiber mat 200, and thus, a repulsive force is applied to the charged fine particles. can provide

In addition, the polymer fiber mat 300 may be electrically connected to the voltage applying device, and may be electrically charged to have either a polarity of a (+) pole or a (-) pole.

For example, the polymer fiber mat 300 may be deposited with a conductive material such as gold, silver, copper, or platinum or coated with a metallic material such as gold, silver, or copper, and may be electrically connected to an external voltage applying device. can

2 is a view for explaining the polarization phenomenon of the fine particles according to an embodiment of the present invention.

As shown in FIG. 2 , the metal-plated fiber mat 200 uses the polarization phenomenon of the fine particles 1 introduced through the inlet 110 to either branch of the (+) pole or the (-) pole. electrify it.

Specifically, when a voltage is applied to the metal-plated fiber mat 200, the fine particles 1 in the first space pass through the charged metal-plated fiber mat 200 and move to the second space while performing a polarization reaction. It is charged to a different pole from the electrically charged metal-plated fiber mat 200, and the charged fine particles 1 in the second space move the inlet 110 by the repulsive force of the polymer fiber mat 300. It may be adsorbed and removed by the metal-plated fiber mat 200 while moving in the viewing direction.

More specifically, the metal-plated fiber mat 200 receives a voltage from a voltage applying device to generate an electric field and at the same time is charged to a (+) pole, and the fine particles 1 having a neutrality in the first space are metal As it passes through the metal-plated fiber mat 200 composed of microfibers 210, it is charged to the (-) pole due to the polarization phenomenon.

Accordingly, the fine particles (1) charged to the (-) pole flows in the lower direction of the second space by the repulsive force of the polymer fiber mat 300 and is charged to the (+) pole in the metal-plated fiber mat 200. will be adsorbed.

Hereinafter, the metal-plated fiber mat 200 and the polymer fiber mat 300 will be described in detail.

3 is a view for explaining the manufacturing process of the polymer fiber mat and the metal-plated fiber mat of the fine particle dust collecting system using metal microfibers and an electric field according to an embodiment of the present invention.

Referring to FIG. 3 , the polymer fiber mat 300 may include polymer nanofibers 310 prepared by electrospinning a polymer solution in which a solvent is added to an organic polymer material.

Here, the organic polymer material is PVP (Polyvinylpyrrolidone), PEDOT (Polyethylenedioxythiophene), PAN (Polyacrylonitrile), PAA (polyacrylic acid), PVA (polyvinylalcohol), PMMA (polymethyl methacrylate), PVDF (polyvinylidene fluoride), PVac (polyvinylacetate) PS(polystyrene), PVC(polyvinylchloride), PEI(polyetherimide), PBI(polybenzimidasol), PEO(polyethyleneoxide), PCL(poly e-caprolactone), PA6(polyamide-6), PTT(polytrimethylenetetraphthalate), PDLA(poly D, L-lactic acid), polycarbonate, polydioxanone, polyglycolide, and may be at least one selected from the group consisting of dextran.

In addition, the solvent is DMF (N, N-Dimethylformamide) water, ethanol, methanol, isopropanol, DCM (Dichloromethane), MC (methylene chloride), acetic acid, acetonitrile, DMA (N, N-dimethylacetamide), m-cresol, It may be at least one selected from the group consisting of toluene, tetrahydrofuran, formic acid, pyridine, aceton, acetonitrile, chloroform, ethyl acetate and trifluoroethanol.

The polymer fiber mat 300 according to an embodiment of the present invention is preferably electrospinning a polymer solution in which dimethylformamide (DMF) is added to polyacrylonitrile (PAN).

In addition, the polyacrylonitrile (PAN) is preferably 1 to 15 parts by weight based on 100 parts by weight of the polymer solution, and the polymer solution may be stirred using a magnetic stirrer for 20 to 30 hours.

Accordingly, the polymer fiber mat 300 can be manufactured to be formed in the form of a net by transferring the polymer nanofibers 310 onto a metal substrate.

The metal-plated fiber mat 300 may be formed by depositing a conductive material on the surface of the polymer fiber mat 300 and then coating the metallic material with an electroplating method.

Here, the conductive material may be made of any one of gold, silver, aluminum, copper, nickel, and platinum, and is preferably platinum in an embodiment of the present invention.

The conductive material such as platinum may be deposited on the surface of the polymer fiber mat 300 using a platinum plasma deposition apparatus, and the minimum conductivity for electroplating the polymer fiber mat 300 made of a non-conductive material. can provide

In addition, the metallic material may be made of any one of gold, silver, and copper, and in an embodiment of the present invention, copper is preferable.

The copper may be coated on the polymer fiber mat 300 on which a conductive material is deposited using an electroplating method.

Specifically, a metallic material such as copper is grown based on the conductive material during electroplating and coated on the polymer nanofiber 301, whereby the polymer nanofiber 301 is coated with a metallic material to form a metal microfiber ( 201) can be manufactured.

In addition, the metal-plated fiber mat 300 composed of the metal microfibers 201 may be manufactured by electroplating for 10 to 60 seconds, and as the electroplating time increases, the metal microfibers 201 are formed from 2 to 60 seconds. It may have a diameter of 5 μm.

Example : Composition of fine particle dust collection system using metal microfiber and electric field

4 is a view showing a fine particle dust collecting system using metal microfibers and an electric field and a fiber mat constituting the fine particle dust collecting system according to an embodiment of the present invention.

Referring to FIG. 4, the system uses a cylindrical tube in which the upper and lower portions are communicated as the body portion 100, a copper-plated fiber mat as a metal-plated fiber mat 200, and a PAN fiber mat as a polymer fiber mat 300, An incense stick may be disposed as a smoke generating source in the inlet 110 , and a fan inducing a flow of smoke may be installed in the outlet 120 .

In addition, the copper-plated fiber mat is installed in the upper direction of the copper-plated fiber mat, it may be installed in the top (Top), middle (Middle) and bottom (Bottom) positions.

In addition, the PAN fiber mat may be electrically connected to a voltage applying device, and a gas detector for detecting gas may be further installed at the outlet 120 .

Experimental example 1 - Copper electroplating of copper microfibers per hour diameter evaluation

A PAN solution was prepared in which dimethylformamide (DMF) was added to polyacrylonitrile (PAN) for electrospinning before the diameter evaluation of copper microfibers, and the polyacrylonitrile (PAN) was 100 weight of the PAN solution 8 parts by weight per part.

Then, the PAN solution was stirred at room temperature for 24 hours using a magnetic stirrer.

Then, the stirred PAN solution was electrospun to prepare a PAN fiber mat composed of PAN nanofibers, and 80 g of copper, 25 g of sulfuric acid, 2.5 g of hydrochloric acid, 50 g of formaldehyde and 500 mL of distilled water were added for copper electroplating of the PAN fiber mat. An electroplating solution was prepared by mixing.

Thereafter, platinum was deposited on the PAN fiber mat using a platinum plasma deposition apparatus, and the platinum-deposited PAN fiber mat was placed in the electroplating solution together with the metal foil, and electroplating was performed.

The diameter evaluation of copper microfibers was evaluated by performing the copper electroplating for 10 to 60 seconds.

In relation to this, Figure 5 is an SEM image showing the copper microfibers according to the electroplating time according to an embodiment of the present invention.

5, the diameter of the PAN nanofibers before copper electroplating is 0.53 ± 0.027 μm, and the diameters of copper microfibers after copper electroplating are 10 sec, 30 sec and 60 sec at electroplating times, respectively. 2.24 ± 0.096, 3.83 ± 0.178 and 4.77 ± 0.178 μm.

Experimental example 2 - copper microfiber electrostatic Smoke Filtration Assessment

Electrostatic smoke filtration evaluation was conducted in a high concentration carbon monoxide atmosphere, filtration time of 360 seconds, and after 180 seconds, the carbon monoxide concentration according to the copper electroplating time of copper microfibers, the position of the PAN fiber mat, and the number of copper plated fiber mats under the voltage condition of 20Kv. was evaluated.

In relation to this, FIG. 6 is a graph showing the change in CO concentration according to the electroplating time (a), the position of the PAN fiber mat (b), and the number of copper-plated fiber mats (c) according to an embodiment of the present invention.

Referring to FIG. 6(a), when there is no copper-plated fiber mat (w/o fibers), copper-plated fiber mat before copper electroplating (0s), copper-plated fiber mat with copper electroplating for 10 seconds (10s), 30 The concentration of carbon monoxide in the copper-plated fiber mat (30s) electroplated with copper for a second and copper-plated fiber mat (60s) electroplated with copper for 60 seconds can be checked, and as the copper electroplating time increases, carbon monoxide after voltage application at 180 seconds It can be observed that the concentration of

Referring to FIG. 6(b), in a system including a copper-plated fiber mat 60s plated with copper for 60 seconds, the closer the position of the PAN fiber mat to the copper-plated fiber mat, the lower the concentration of carbon monoxide after voltage application. confirmed to lose.

Referring to FIG. 6(c), as the number of copper-plated fiber mats increased in a system including the copper-plated fiber mat 60s electroplated with copper for 60 seconds, it was confirmed that the concentration of carbon monoxide decreased after voltage application.

Experimental example 3 - fine particles of copper microfibers Collection efficiency evaluation

The fine particle collection efficiency was evaluated on the fine particle size in a solid type fine particle atmosphere, a filtration time of 360 seconds, a voltage of 20 Kv, and a copper-plated fiber mat with copper electroplating for 60 seconds.

In relation to this, Figure 7 is a graph showing the fine particle collection efficiency according to whether the copper-plated fiber mat according to an embodiment of the present invention (a) and the size of the fine particles (b).

Referring to FIG. 7( a ), when a copper-plated fiber mat that was electroplated with copper for 60 seconds rather than a PAN fiber mat before copper electroplating was included in the system, it was confirmed that it greatly affects the collection of fine particles of 1 μm or less after voltage application. did.

Referring to FIG. 7(b), when a copper-plated fiber mat subjected to copper electroplating for 60 seconds is included in the system, after voltage application, the fine particles of 10 μm or less exhibited a capture rate of 98.84%, and the fine particles of 1 μm or less were included in the system. showed a collection rate of 74.39%.

Experimental example 4 - Experiments to evaluate the reuse of copper microfibers

The reuse evaluation experiment was evaluated based on the adsorption of fine particles and the appearance after washing under conditions including solid type and soft type fine particle atmosphere, filtration time of 360 seconds, voltage of 20Kv, and copper-plated fiber mat with copper electroplating for 60 seconds. did.

In relation to this, Figure 8 shows copper plating before (a), after soft type fine particle filtration test (b), after DMF immersion (c), and after ultrasonication (d) according to an embodiment of the present invention It is an SEM image of the fiber mat, and FIG. 9 is an SEM image of the copper-plated fiber mat before and after the solid type fine particle filtration test according to an embodiment of the present invention.

Figure 8 (a) can confirm the appearance of the copper microfibers before the smoke filtration evaluation, and in Figure 8 (b) it can be confirmed that the soft type fine particles are adsorbed between the copper microfibers after the smoke filtration evaluation.

In Fig. 8(c), it can be seen that the copper microfibers adsorbed with soft type fine particles are immersed in dimethylformamide (DMF), and in Fig. 8(d), copper microfibers dipped in dimethylformamide (DMF) are shown. can be seen after ultrasonic treatment.

Referring to FIG. 9 , the solid type fine particles in the form of dust were removed using a method of shaking off water and air, and it can be seen that the copper microfibers were filtered through repeated washing.

The above detailed description is illustrative of the present invention.

In addition, the above description shows and describes preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications, and environments. That is, changes or modifications are possible within the scope of the concept of the invention disclosed herein, the scope equivalent to the written disclosure, and/or within the scope of skill or knowledge in the art. The written embodiment describes the best state for implementing the technical idea of the present invention, and various changes required in specific application fields and uses of the present invention are possible. Accordingly, the detailed description of the present invention is not intended to limit the present invention to the disclosed embodiments. Also, the appended claims should be construed as including other embodiments.

100: body part
200: metal plated fiber mat
300: polymer fiber mat

Claims (10)

a body portion formed with an inlet and an outlet through which fine particles flow;
a metal-plated fiber mat disposed inside the main body to electrically charge the fine particles flowing in from the inlet; and
A fine particle dust collecting system comprising a polymer fiber mat that is spaced apart from the upper portion of the metal-plated fiber mat and provides a repulsive force to the charged fine particles.
The method of claim 1,
The body part,
The upper part and the lower part communicate with each other to have an internal space,
The inner space includes a first space formed between the inlet and the metal-plated fiber mat, a second space formed between the metal-plated fiber mat and the polymer fiber mat, and formed between the polymer fiber mat and the outlet. A fine particle dust collection system comprising a third space to be
3. The method of claim 2,
The polymer fiber mat,
A fine particle dust collecting system comprising polymer nanofibers prepared by electrospinning a polymer solution containing dimethylformamide (DMF) added to polyacrylonitrile (PAN).
4. The method of claim 3,
The polyacrylonitrile (PAN) is,
The fine particle dust collecting system in an amount of 1 to 15 parts by weight based on 100 parts by weight of the polymer solution.
5. The method of claim 4,
The polymer fiber mat,
A fine particle dust collecting system formed in the form of a net by transferring the polymer nanofibers onto a substrate.
6. The method of claim 5,
The metal-plated fiber mat,
A fine particle dust collecting system formed by depositing a conductive material on the surface of the polymer fiber mat and then coating a metallic material with an electroplating method.
7. The method of claim 6,
The metal-plated fiber mat,
A system for collecting fine particles comprising metal microfibers having a diameter of 2 to 5 μm.
8. The method of claim 7,
The metal-plated fiber mat,
A fine particle dust collecting system that receives a voltage from an external power source to generate an electric field between the second space and the third space, and is charged with a (+) pole or a (-) pole.
9. The method of claim 8,
When a voltage is applied to the metal-plated fiber mat, the fine particles in the first space pass through the charged metal-plated fiber mat and move to the second space through a polarization reaction, which is different from the charged metal-plated fiber mat. and the charged fine particles in the second space are adsorbed to and removed from the metal-plated fiber mat while moving in the direction facing the inlet by the repulsive force of the polymer fiber mat.
10. The method of claim 9,
The polymer fiber mat,
A fine particle dust collection system that is electrically grounded so that it becomes the same potential as the external earth.

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