KR20140136286A - Absorber for removing air pollutant - Google Patents

Abstract

Provided is an environmentally-friendly absorber comprising nanofiber formed by the electric radiation and having excellent effects of removing air pollutants, especially, volatile organic compounds, carbon dioxide, and nitric oxide, wherein the nanofiber comprises a polymer for forming the nanofiber and fly ash.

Description

[0001] ABSORBER FOR REMOVING AIR POLLUTANT [0002]

The present invention relates to an environmentally friendly absorber exhibiting excellent effects on pollutants in air, in particular, volatile organic compounds, carbon dioxide and nitrogen oxides.

Recently, it is urgently required to study a technique for reducing the pollutants such as carbon dioxide, volatile organic substances, and nitrogen oxides in a vehicle interior.

The recommended standards for carbon dioxide (CO ₂ ) in indoor air prepared by the government are less than 1000ppm, and when the concentration of carbon dioxide exceeds 1000ppm, symptoms such as headache, drowsiness and dyspnea appear. Also, in the case of an electric car which has recently started commercialization, setting the mode for circulating air in the vehicle in winter or the mode for betting is the main cause of fuel consumption reduction.

In addition, when ventilating equipment is operated to ventilate the vehicle in the city center and air is introduced, air pollutants on the roadside, particularly high concentrations of nitrogen oxides (NOx) and volatile organic compounds (VOCs) It may enter the room and cause harmful effects on the occupant's body. In addition, harmful VOCs such as formaldehyde from petrochemical products used as interior materials such as sheets or dashboards in automobiles cause so called new car syndrome which causes headache, vomiting and skin inflammation.

In this regard, an electrostatic filter for removing harmful substances such as fine dust in the outside air is installed in the automobile. However, the filter is expected to remove gaseous pollutants such as nitrogen oxides (NOx) and volatile organic compounds (VOCs) Is difficult.

Also, as a technique for treating VOC at room temperature, a method using an adsorbent is effective. Activated carbon has a large specific surface area, and because it is hydrophobic, it can effectively treat VOCs such as toluene and benzene in the air. However, activated carbon has a long lifetime and secondary pollutants may be generated at the time of destruction. When the temperature is high or the water content is high, there is a problem of deterioration of adsorption capacity and deterioration of filter life.

As the treatment method of NOx, selective catalytic reduction (SCR) in which ammonia is reacted on the catalyst to reduce it to nitrogen is the most common. However, since the SCR catalyst requires a high temperature of 300 ° C or higher, it can not be used at room temperature. Also, since the adsorption efficiency of NO 3 gas having a high NO x ratio is not high and the adsorption efficiency to VOC is low, it is not suitable for the simultaneous treatment of VOC and NO x.

Therefore, it is required to develop a new interior part of a vehicle for simultaneous removal and reduction of CO ₂ and VOC and NOx.

Patent Document 1: Japanese Patent Application Laid-Open No. 2004-261658 (published on September 24, 2004)

Non-Patent Document 1: Effect of VOC loading on the ozone removal efficiency of activated carbon filters, T.A. Metts, S.A. Batterman, Chemosphere, 2006 Jan; 62 (1): 34-44

It is an object of the present invention to provide an environmentally friendly absorbent material exhibiting excellent effects on the removal of airborne pollutants, particularly volatile organic compounds, carbon dioxide and nitrogen oxides.

According to an embodiment of the present invention, there is provided a method for manufacturing a nanofiber, comprising: nanofibers produced by electrospinning, wherein the nanofiber includes a fly ash and a polymer for forming a nanofiber, Thereby providing a shock absorber.

The fly ash may have an average particle diameter of 50 to 500 nm.

The fly ash may be contained in an amount of 10 to 50% by weight based on the total weight of the absorbent material.

The polymer for forming nanofibers is preferably polyurethane or polyamide.

The absorbent material may further include an additive selected from the group consisting of a mixture of _{SiO 2, TiO 2, ZnO,} Al 2 O 3, CaCO 3 and mixtures thereof.

The nanofibers may have an average diameter of 50 nm or more and less than 1000 nm.

The nanofibers are three-dimensionally irregularly and discontinuously arranged to form a web.

According to another embodiment of the present invention, there is provided a method for forming nanofibers, comprising: preparing a composition for forming nanofibers including fly ash and a polymer for forming nanofibers; And preparing nanofibers by electrospinning the composition for forming nanofibers. The present invention also provides a method of manufacturing an absorber for removing pollutants in the air.

For the nano fiber forming composition may further include an additive selected from the group consisting of a mixture of _{SiO 2, TiO 2, ZnO,} Al 2 O 3, CaCO 3 and mixtures thereof.

The composition for forming nanofibers may have a viscosity of 300 to 700 cP.

The electrospinning may be conducted under an electric field of 20 to 3,500 V / cm.

The electrospinning can be carried out by releasing the composition for forming nanofibers at a release rate of 0.25 to 1.5 l / hr.

According to another embodiment of the present invention, there is provided an air filter including the above-described absorber.

The air filter may include a base material filter and the absorber described above located on at least one side of the filter.

According to another embodiment of the present invention, there is provided an air filter for circulating the interior of an automobile including the above absorbent material.

Other details of the embodiments of the present invention are included in the following detailed description.

The absorber according to the present invention exhibits excellent effects on the removal of pollutants in the air, especially volatile organic compounds, carbon dioxide and nitrogen oxide. In addition, the absorber is a technology for reducing pollutants in the air by recycling eco-friendly resources by using fly ash without second purification treatment. In addition, since the incombustible material is used, it is possible to prevent a suffocation accident caused by a harmful gas or the like in the event of a fire.

1 is a schematic view schematically showing an electrospinning process in the production of an absorber for removing contaminants in air according to an embodiment of the present invention.
FIG. 2A is a photograph of a field emission scanning electron microscope (FE-SEM) observation of a fly ash, FIG. 2B is a partial enlarged view, FIG. 2C is an energy dispersive X-ray spectroscopy X-ray Spectroscopy (EDS).
3 is an FE-SEM photograph of the absorber of the comparative example.
FIG. 4A is a transmission electron microscope (TEM) image of an absorber of Example 1, and FIG. 4B is a graph showing an EDS elemental analysis result.
Fig. 5 is a graph showing the X-ray diffraction patterns of the absorbent materials of Examples 1 to 4 and Comparative Example and the fly ash as a reference example.
FIG. 6 is a graph showing the results of observing the characteristics of thermal changes using the absorbers prepared in Examples 1 to 4 and Comparative Example, and the fly ash as a reference example using a thermogravimetric analysis (TGA).
7 is a graph showing the results of observing absorption and removal effects of various volatile organic compounds using the absorber of Example 2. FIG.
8 is a graph showing the results of evaluating the absorption and removal effects of volatile organic compounds on the shock absorbers of Examples 1 to 4 and Comparative Examples.
9 is a photograph of the surface of the air filter manufactured in Example 5, observed by FE-SEM.
10 is a graph showing a result of observing the carbon dioxide reduction effect of the absorber produced in Example 2. Fig.
11 is a schematic diagram schematically showing an experimental method in a simulation laboratory for measuring the carbon dioxide reduction effect of the absorber according to the present invention.
12 is a graph showing the results of observing the effect of carbon dioxide reduction according to the content of fly ash in the absorber according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail. However, the present invention is not limited thereto, and the present invention is only defined by the scope of the following claims.

The present invention utilizes fly ash having excellent adsorptivity for contaminants such as carbon dioxide, volatile organic compounds, nitrogen oxides and the like in the air and maximizes the adsorption area for contaminants by making the absorbent material nanofiber through an electrospinning process, Characterized by exhibiting a significantly improved removal effect on the contaminants.

That is, an absorber for removing air pollutants according to an embodiment of the present invention includes nanofibers produced by electrospinning, and the nanofibers include fly ash and polymers for forming nanofibers.

Specifically, the fly ash is a fine coal ash collected from a flue gas of a pulverized coal boiler such as a power plant by a dust collector. The fly ash is mainly composed of SiO ₂ , Al ₂ O _3, and glass as well as being capable of directly fixing carbon dioxide , Carbon dioxide, volatile organic compounds, nitrogen oxides, and the like.

The fly ash is a spherical particle and usually has a particle diameter of several micrometers to several hundreds of micrometers. However, when the particle diameter of the fly ash is too small, it is difficult to uniformly disperse in the polymer nanofiber due to agglomeration of the fly ash, and when the particle diameter is excessively large, the adsorption ability may be lowered. Therefore, And has an average particle diameter of 50 to 500 nm, preferably 50 to 250 nm in consideration of the adsorptivity of the nanofibers and the nanofiber forming property.

Such fly ash may be contained in an amount of 10 to 90% by weight, preferably 10 to 70% by weight, based on the total weight of the absorbent material. In consideration of the effect of removing contaminants and the formation of nanofibers, By weight, more preferably 10 to 20% by weight.

As the polymer for forming nanofibers, any material capable of forming nanofibers together with fly ash can be used without any particular limitation.

It is preferable to use a polymer which is insoluble in ordinary organic solvents and exhibits excellent chemical resistance as well as a polymer which has hydrophobicity and is free from the possibility of morphological deformation due to moisture in a high humidity environment. Specific examples thereof include polyurethane, PU), polyamide (NYLON 6), polyimide (PI), polybenzoxazole (PBO), polybenzimidazole (PBI), polyamideimide (PAI), polyethylene terephthalate polyethyleneterephtalate, polyethylene (PE), polypropylene (PP), copolymers thereof or mixtures thereof. Among them, polyurethane or polyamide has a high tensile strength and excellent thermoformability It is preferable because it can exhibit an absorbing elastic effect superior to that.

When the weight average molecular weight of the polymer is too low, there is a possibility that the strength characteristics of the nanofiber may be degraded. On the other hand, when the weight average molecular weight of the polymer is too high, This is difficult. Accordingly, in order for the absorbent material to exhibit an optimal thickness and porosity including nanofibers having an optimized diameter to exhibit improved pollutant-absorbing ability, the nanofiber-forming polymer has a weight average molecular weight of 30,000 to 500,000 g / mol .

In addition to the above-mentioned fly ash and nanofiber polymer, the nanofiber can be used as an additive for improving adsorption performance, which is capable of adsorbing pollutants in the air such as carbon dioxide, volatile organic compounds or nitrogen oxides, Or other additives for improving the use of additives such as flame retardancy.

Specifically, the additive for improving the adsorption function may further include SiO ₂ , TiO ₂ , ZnO, Al ₂ O ₃ , CaCO _3, or a mixture thereof. These additives for improving the adsorption function are preferably contained in an amount of 10 to 50% by weight based on the total weight of the composition for electric discharge, in consideration of the adsorptivity to the contaminants and the nanofiber forming property.

The functional additive for forming the nanofibers may further include a curing agent, a point binder, a conventional absorbent, and the like. The curing agent is preferably selected according to the kind of the precursor of the nanofiber forming polymer. Specifically, the curing agent is preferably selected from acetic anhydride, pyridine, toluene sulfonic acid, hydroxybenzyl alcohol, aminophenol, hydroxybenzaldehyde, aminobenzoic acid Can be used. It is preferable that the content of the curing agent is appropriately determined according to the content of the polymer precursor contained in the composition for use in electrospray.

These additives are preferably contained within a range that does not deteriorate the adsorption efficiency against the contaminants, and specifically, they are preferably contained in an amount of 10 to 50% by weight based on the total weight of the composition for use in the electric discharge.

The nanofibers having the above-described constitution are produced by electrospinning. By controlling the condition of electrospinning, the diameter of the nanofibers can be optimized to the extent that the adsorption and removal effects of pollutants can be maximized. Accordingly, the nanofiber may have an average diameter of 50 nm or more and less than 1000 nm, preferably 50 to 500 nm, and more preferably 100 to 400 nm.

In addition, the absorber may have a nanofiber shape in which the nanofibers are arranged discontinuously in a three-dimensional irregular shape. At this time, the nanoweb may have an optimized thickness and porosity to exhibit the maximum pollutant adsorption and removal effect through controlling the diameter and density of the nanofibers. Specifically, the shock absorber may have a thickness of 0.05 to 0.2 mm.

According to another embodiment of the present invention, there is provided a process for producing the above-mentioned absorber.

Specifically, the manufacturing method includes preparing a composition for forming a nanofiber, and electrospinning the composition for forming a nanofiber.

First, the step of preparing the nanofiber forming composition is carried out by mixing the above-described fly ash and nanofiber forming polymer, and optionally additives in a solvent.

At this time, the mixing process may be performed according to a conventional mixing process, and the fly ash, the nanofiber forming polymer and the additive are the same as described above.

The solvent is not particularly limited as long as it is a conventional organic solvent capable of dissolving the polymer. Specifically, N-methyl-2-pyrrolidone (NMP), dimethyl formamide (DMF), dimethyl acetamide (DMAc), dimethyl sulfoxide (DMSO), and tetrahydrofuran (THF) can be used.

The organic solvent may be included in an amount such that the composition for the electrospray has an appropriate viscosity for electrospinning. Specifically, the composition for the electrospray may be included in an amount such that the composition has a viscosity of 300 to 700 cP.

Then, the nanofiber-forming composition prepared above is electrospun to produce nanofibers.

The electrospinning process may be carried out according to a method of manufacturing nanofibers using a conventional electrospinning process, except that the composition for forming nanofibers is used.

1 is a schematic view schematically showing an electrospinning process in the production of an absorber according to an embodiment of the present invention. 1 is only one example for explaining the present invention, but the present invention is not limited thereto.

Referring to FIG. 1, in the solution tank 10 in which the nanofiber forming composition 20 is stored, a predetermined amount of the composition for forming nanofibers is supplied to a radiation part by using a metering pump, 30 to form the coagulated and hardened nanofibers 50 at the same time as the scattered nanofibers 50 are dispersed, and then the coagulated nanofibers 50 are further coated with a releasing material, for example, , An aluminum foil, a polyester paper, or the like, to produce a fiber aggregate.

At this time, the release rate of the composition for forming nanofibers through the nozzle is preferably 0.25 to 1.5 l / hr, more preferably 0.25 to 1.2 l / hr.

When the intensity of the electric field applied at this time is too low, the electric discharge composition is not continuously discharged, so that the nanofiber having uniform thickness can be used. And it is difficult to produce a fibrous aggregate because the nanofibers formed after spinning can not be smoothly focused on the collector. On the other hand, when the electric field strength is too high, it is difficult to obtain a fiber aggregate having a normal shape because the nanofibers are not accurately placed on the collector. Accordingly, the intensity of the electric field applied between the radiation part and the collector is preferably 20 to 3500 V / cm, and more preferably 2000 to 3000 V / cm.

Further, it is preferable that the spinning process is performed at room temperature and at a humidity of 30 to 40%.

Through the spinning process, nanofibers having a uniform fiber diameter, specifically an average diameter of 50 nm or more and less than 1000 nm, are produced, and the nanofibers are randomly arranged on the collector so that the nanofibers are three-dimensionally irregular and discontinuous To form an ordered fibrous assembly, i. E., A web.

The absorber produced by the above-mentioned production method includes a nanofiber formed by electrospinning or a nanofiber web in which these nanofibers are three-dimensionally irregularly and discontinuously arranged. The nanofibers include fly ash together with the nanofiber forming polymer. By including the nanofibrous fly ash as described above, the area of contact with the pollutant is significantly increased as compared with the absorbent material filmed by the fly ash itself, and as a result, it can exhibit remarkably improved adsorbability and elimination ability of the pollutant.

In addition, the absorber may be used in its own form or in the form of a composite material. Specifically, it may be formed on a filter using a conventional filter as a base material.

The absorber according to the present invention exhibits conductivity by including a fly ash having conductivity in the nanofiber, and has an improved mechanical strength as compared with a nanofiber composed of only a polymer. The conductivity and the mechanical strength of the absorber depend on the amount of fly ash used, specifically the electrical conductivity of 0.1 to 0.7 ms / m and the mechanical strength of 2 to 10 MPa.

The absorber according to the present invention is a technology for reducing pollutants in the air through the recycling of eco-friendly resources by using fly ash without the second purification treatment, and it is possible to remove pollutants in air, especially volatile organic compounds, carbon dioxide and nitrogen oxides It shows excellent effect and uses noncombustible material, so it is possible to prevent the occurrence of suffocation due to noxious gas in case of fire. Accordingly, the absorber according to the present invention can be applied to automobile parts such as filters such as a suction filter, a ceiling material, an instrument panel in an automobile cabin, and an inner sheet such as a trim. Especially, And is useful as an air filter for air.

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Example 1

90% by weight of a polyurethane resin and 10% by weight of fly ash having an average diameter of 250 nm or less in 10 ml of a mixed solvent of dimethylformamide (DMF) and methyl ethyl ketone (MEK) (mixing volume ratio 5: 5) Lt; / RTI >

The prepared nanofiber forming composition was transferred to a solution tank, and then supplied to a spinning chamber having an electric field of 20 V / cm through a metering gear pump to be spun. At this time, the supply amount of the composition for forming nanofibers was 25 ml / min.

As a result of the electrospinning, an absorber comprising nanofibers having an average diameter of 250 nm was prepared.

Examples 2 to 4

An absorbent was prepared in the same manner as in Example 1 except that the content of fly ash contained in the composition for forming a nanofiber was varied as shown in Table 1 below.

Comparative Example

An absorber was prepared in the same manner as in Example 1 except that fly ash was not used in the preparation of the nanofiber forming composition.

Polymer
(weight%) Fly ash
(weight%) Viscosity (cP) Example 1 Polyurethane resin
(90) Fly ash
(10) 422 Example 2 Polyurethane resin
(70) Fly ash
(30) 462 Example 3 Polyurethane resin
(50) Fly ash
(50) 508 Example 4 Polyurethane resin
(30) Fly ash
(70) 539 Comparative Example Polyurethane resin
(100) - 412

In Table 1, the viscosity of the composition for forming nanofibers was measured using a viscosity meter.

Test Example 1: Evaluation of physical properties of an absorber

The fly ash used in the above examples, and the comparative example and the absorber prepared in Example 1 were analyzed and observed using an elemental analyzer and a transmission electron microscope. The results are shown in Figs. 2A to 4B.

FIG. 2A is a photograph of a field emission scanning electron microscope (FE-SEM) observation of a fly ash, FIG. 2B is a partially enlarged view thereof, FIG. 2C is an energy dispersive X-ray spectrometer Dispersive X-ray Spectroscopy (EDS). Fig. 3 is a scanning electron microscope (FE-SEM) observation image of the shock absorber of the comparative example. 4A is a TEM (transmission electron microscope) photograph of the absorber of Example 1, and FIG. 4B is a graph showing the results of EDS elemental analysis.

From the above measurement results, it was confirmed that the absorber according to the present invention includes nanoscale fibers, and the nanofibers include fly ash.

X-ray diffraction (XRD) patterns were observed on the absorbers prepared in Examples 1 to 4 and Comparative Example and fly ash as a reference example, and the results are shown in FIG.

From the results shown in FIG. 5, it can be confirmed that the absorbent materials of Examples 1 to 4 according to the present invention had fly ash contained in the nanofibers of the polyurethane, so that the structure was changed compared with the known polyurethane structure.

The characteristics of the thermal changes were analyzed by using a thermogravimetric analysis (TGA) for the absorbers prepared in Examples 1 to 4 and Comparative Examples and for fly ash as a reference example. The results are shown in Fig.

As shown in FIG. 6, it can be seen that the weight decrease, that is, the weight change, is caused by the temperature change.

Conductivities and mechanical strengths of the nanofibers prepared in Examples 1 to 4 and Comparative Examples were measured using a viscometer and a tensile strength meter, respectively. The results are shown in Table 2 below.

Conductivity (ms / m) Mechanical strength (MPa) Example 1 0.248 8.1 Example 2 0.336 7.2 Example 3 0.445 4.1 Example 4 0.52 3.2 Comparative Example 0.157 6.7

As shown in Table 2, as the fly ash content increased, the conductivity increased while the mechanical strength decreased. In addition, the conductivity is improved by the inclusion of fly ash as compared with the comparative example of the absorbent material comprising only the polyurethane nanofiber, but it can be confirmed that the mechanical strength is reduced when the fly ash content is higher than a certain level.

Test Example 2 Evaluation of Absorption and Removal Efficiency of Volatile Organic Compounds

In order to evaluate the absorption and removal effects of the absorber according to the present invention on the volatile organic compound, the absorber prepared in Example 2 was placed in a reactor containing various kinds of volatile organic compounds for 1 hour, The degree of reduction of the compound was measured. The same experimental procedure was repeated three times. The results are shown in Fig.

As shown in FIG. 7, the absorbing material prepared in Example 2 exhibited absorption and removal effects on various volatile organic compounds through repeated experiments.

In the same manner as described above, the absorption and removal effects of volatile organic compounds were also evaluated for the absorbent materials prepared in Examples 1 to 4 and Comparative Examples. The results are shown in Fig.

As shown in FIG. 8, the absorbent materials of Examples 1 to 4 including fly ash showed excellent volatile organic compound removal effect as compared with the absorbent material of Comparative Example made of only polymer, and in particular, the fly ash was contained at 10% by weight and 20% by weight The absorbing materials of Examples 1 and 2, which were included, exhibited the absorption efficiency of three times of moving compared to the comparative example. This result is due to the application of the fly ash, which has excellent absorptive surface area and absorption ability by the electrospinning process.

Example 5

The web of nanofibers prepared in Example 2 was laminated on an air-conditioner filter to produce an air filter having an absorber on one side of the base filter.

The surface of the manufactured air filter was observed by FE-SEM. The results are shown in Fig.

As shown in FIG. 9, it can be seen that fine nanofibers including fly ash are formed on the base filter in a spider-like structure, and this shows better absorbency against volatile organic compounds, nitrogen oxides and carbon dioxide Can be expected.

Test Example 3: Evaluation of carbon dioxide reduction effect of the absorber

In order to evaluate the carbon dioxide reduction effect of the absorber according to the present invention, the air filter manufactured in Example 5 was mounted on the air conditioner in the vehicle, and after running for 50 minutes while the three persons were aboard, the concentration of carbon dioxide Respectively.

As a result, it was confirmed that the concentration of carbon dioxide in the vehicle before the experiment was 4000 ppm, but then decreased to 2000 ppm.

The carbon dioxide reducing effect of the absorbent prepared in Example 2 was compared with the conventional absorbent. At this time, zeolite, activated carbon and fly ash were used as conventional absorbent materials for comparison of effects. The results are shown in Fig.

As shown in FIG. 10, the absorbing material according to the present invention showed remarkably excellent carbon dioxide reducing effect in a short time as compared with the conventional absorbing materials.

In addition, an absorbent material was prepared in the same manner as in Example 1 except that fly ash was used in an amount of 60% by weight based on the total weight of the absorbent material, and as shown in FIG. 11, Evaluation of CO 2 Reduction Effectiveness The CO 2 reduction effect was observed according to elapsed time after placing the absorber prepared in the simulation room. The same procedure was repeated twice, and the results are shown in Table 3 below.

division Elapsed time after CO ₂ injection 0 minutes 5 minutes 10 minutes 15 minutes 20 minutes 25 minutes 30 minutes CO ₂ concentration
(ppm) One measurement 4894 3638 3326 3232 3221 3206 3205 2 measurements 3238 2964 2796 2741 2721 - -

As shown in Table 3, the concentration of CO ₂ was remarkably decreased with the passage of time after CO ₂ injection.

In addition, an absorber was prepared in the same manner as in Example 1, except that the content of fly ash was variously changed to 40 wt% and 60 wt% with respect to the total weight of the absorber in the production of the absorber, 11, the CO ₂ reduction effect of the fly ash content in the absorber was compared and evaluated. The results are shown in Fig.

As shown in FIG. 12, the higher the fly ash content, the better the CO ₂ reduction effect than the shorter time.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

10 TANK 20 NANO FIBER FORMING COMPOSITION
30 Spinning nozzle 40 High voltage generator
50 nanofiber 60 collector
100 electrospinning device

Claims (15)

And nanofibers produced by electrospinning,
Wherein the nanofibers include fly ash and polymers for forming nanofibers. The method according to claim 1,
Wherein the fly ash has an average particle size of 50 to 500 nm. The method according to claim 1,
Wherein the fly ash is contained in an amount of 10 to 50% by weight based on the total weight of the absorbent material. The method according to claim 1,
Wherein the polymer for forming nanofibers is polyurethane or polyamide. The method according to claim 1,
The absorbent material to the absorbent material comprises an additive selected from the group consisting of a mixture of _{SiO 2, TiO 2, ZnO,} Al 2 O 3, CaCO 3 and mixtures thereof more. The method according to claim 1,
Wherein the nanofibers have a diameter of 50 nm or more and less than 1000 nm. The method according to claim 1,
Wherein the nanofibers are three-dimensionally irregularly and discontinuously arranged to form a web. Preparing a composition for forming nanofibers including a fly ash and a polymer for forming nanofibers; And
The step of preparing nanofibers by electrospunning the composition for forming nanofibers
And removing the contaminant from the air. 9. The method of claim 8,
The method of producing for the nano fiber forming composition further comprises an additive selected from the group consisting of a mixture of _{SiO 2, TiO 2, ZnO,} Al 2 O 3, CaCO 3 and mixtures thereof. 9. The method of claim 8,
Wherein the composition for forming nanofibers has a viscosity of 300 to 700 cP. 9. The method of claim 8,
Wherein the electrospinning is carried out under application of an electric field of 20 to 3,500 V / cm. 9. The method of claim 8,
Wherein the electrospinning is carried out by discharging the composition for forming nanofibers at a rate of 0.25 to 1.5 l / hr. An air filter comprising an absorber for removing pollutants in the air according to claim 1. 14. The method of claim 13,
Wherein the air filter includes a base filter and an absorber for removing contaminants in the air located on at least one side of the filter. An air filter for circulating inside an automobile, comprising an absorber for removing pollutants in the air according to claim 1.

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