Porous filter fiber for carbon dioxide capture and method for manufacturing same

Abstract

Provided are a porous filter fiber for carbon dioxide capture and a method for manufacturing same, wherein the porous filter fiber exhibits high mechanical stability, enables precise control of the size and distribution of nanopores, and can efficiently adsorb carbon dioxide due to the high specific surface area thereof. The manufacturing method comprises the steps of: preparing a first solution including a polymer support; preparing a second solution including an amine-based carbon dioxide collector; preparing a base solution in which the first solution and the second solution are mixed; electrospinning the base solution at a relative humidity of 30 to 60% to produce a filter fiber; and forming nanopores on the surface of the filter fiber using a breath figure method.

Description

Porous filter fiber for carbon dioxide capture and method for manufacturing the same

[0001] Embodiments of the present invention relate to a porous filter fiber for carbon dioxide capture and a method of manufacturing the same, and more specifically, to a porous filter fiber for carbon dioxide capture and a method of manufacturing the same using a breath figure method.

[0002] In modern life, the indoor environment is emerging as a critical factor directly linked to health. Humans spend an average of 80–90% of their daily time indoors, and consequently, indoor air quality has a direct impact on human health. The U.S. Environmental Protection Agency (EPA) has warned about the severity of indoor air pollution, and the World Health Organization (WHO) has announced that approximately 2.8 million people die annually due to indoor air pollution. Furthermore, it is reported that indoor pollutants are about 1,000 times more likely to reach the lungs than outdoor pollutants. This suggests that managing indoor air quality is an issue that extends beyond mere convenience and has a significant impact on human health.

[0003] In particular, in future environments where natural ventilation is difficult due to external environmental factors such as yellow dust and fine dust, indoor air purification and circulation become even more essential. The most challenging pollutant to manage in indoor air is carbon dioxide (CO2). At CO2 concentrations of 700–1,000 ppm, discomfort and decreased concentration occur, while at 1,000–2,000 ppm, fatigue and drowsiness appear. If the concentration exceeds 2,000 ppm, headaches and stiff shoulders occur, and if it exceeds 3,000 ppm, serious health problems such as dizziness may be triggered.

[0004] The primary sources of indoor carbon dioxide are the respiration of indoor occupants and the use of open-type combustion appliances. Carbon dioxide emissions from human respiration vary depending on activity levels, and indoor combustion appliances, such as oil and gas stoves, are also major sources of carbon dioxide. While sufficient ventilation is essential when using these appliances, natural ventilation faces limitations in future environments—such as high-rise buildings, polar regions, and space habitats—where minimizing resource and energy loss is crucial. Therefore, there is a need for resource and energy-circulating technologies that can effectively capture, desorb, and decompose carbon dioxide indoors as an alternative to ventilation. Currently, most indoor air quality control technologies are filter-based, yet there are very few technologies capable of effectively capturing or decomposing carbon dioxide.

[0005] Embodiments of the present invention aim to provide a method for manufacturing a porous filter fiber for carbon dioxide capture that has high mechanical stability, can precisely control the size and distribution of nanopores, and can efficiently adsorb carbon dioxide with a high specific surface area.

[0006] Embodiments of the present invention aim to provide a porous filter fiber for carbon dioxide capture manufactured by this method.

[0007] A method for manufacturing a porous filter fiber for carbon dioxide capture according to one embodiment of the present invention comprises: a step of preparing a first solution containing a polymer support; a step of preparing a second solution containing an amine-based carbon dioxide capture agent; a step of preparing a base solution by mixing the first solution and the second solution; a step of manufacturing a filter fiber by electrospinning the base solution at a relative humidity of 30 to 60%; and a step of forming nanopores on the surface of the filter fiber using a breath figure method.

[0008] The step of forming the nanopores may involve using the latent heat of evaporation of a volatile solvent contained in the base solution to form micro-droplets on the surface of the filter fiber and evaporating the micro-droplets to form the nanopores in the place where the micro-droplets were evaporated.

[0009] The filter fiber may contain 1 to 20 wt% of the amine-based carbon dioxide capture agent.

[0010] The above polymer support may be at least one selected from the group consisting of PMMA (Polymethyl methacrylate), PLA (Polylactic acid), and PS (Polystyrene).

[0011] The above amine-based carbon dioxide capture agent may be at least one selected from the group consisting of ethylenediamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, hexaethyleneheptamine, polyethyleneimine, polypropyleneimine, and APTES (3-aminopropyltriethoxysilane).

[0012] The first solution may include dichloromethane, dimethylformamide, and PMMA (polymethyl methacrylate), and the second solution may include ethanol, polyethyleneimine (EB-PEI) modified by partial substitution with epoxybutane, and tetraethylammonium phosphate (TEAH2PO4).

[0013] The filter fibers above may have a thickness of 1 to 20 μm.

[0014] The above filter fiber may have a carbon dioxide adsorption capacity of 0.23 to 1.8 mmol / g.

[0015] The above nanopores may have an average diameter of 16 to 25 nm.

[0016] A porous filter fiber for carbon dioxide capture according to one embodiment of the present invention for achieving the above other objectives is manufactured according to the previously mentioned manufacturing method.

[0017] Specific details of other embodiments are included in the specific contents and drawings.

[0018] The present invention enables the production of porous filter fibers for carbon dioxide capture using a simple method without the high-temperature carbonization process required in existing technologies. This allows for a significant reduction in costs and energy consumption during the manufacturing process and presents an economical and eco-friendly alternative.

[0019] Furthermore, the present invention can dramatically increase the pore volume and specific surface area of ​​filter fibers by controlling humidity during the electrospinning process and utilizing the Breath Figure Method. This maximizes the contact area and time between carbon dioxide and the filter fibers, thereby maximizing carbon dioxide capture efficiency.

[0020] Furthermore, the porous filter fibers produced in this invention provide the following additional advantages compared to conventional powder filters. First, since this invention is manufactured in a fiber form, it exhibits superior mechanical stability compared to conventional powder filters. Consequently, maintaining the filter shape is easy, and issues such as loss or powdering during use do not occur. Second, this invention allows for precise control of the size and distribution of nanopores in the filter fibers, enabling customized designs tailored to specific applications. Third, due to its high specific surface area, this invention adsorbs carbon dioxide more efficiently and can process large amounts of carbon dioxide quickly and effectively.

[0021] In addition, the porous filter fiber of the present invention is differentiated from conventional activated carbon fiber. That is, while conventional technology required high-temperature heat treatment of 900 to 1000 degrees or higher to form pores on the surface of the fiber, the present invention omits this, thereby simplifying the manufacturing process and reducing environmental burden and energy consumption.

[0022] In conclusion, the present invention presents a novel approach for manufacturing high-performance carbon dioxide capture filters more simply and economically, and provides excellent effects in various aspects such as carbon dioxide capture efficiency, mechanical stability, and reduced manufacturing costs. The present invention can be practically utilized in air conditioners, air purifiers, and various air quality management systems.

[0023] FIG. 1 is a flowchart illustrating a method for manufacturing a porous filter fiber for carbon dioxide capture according to one embodiment of the present invention.

[0024] Figure 2 is a schematic diagram showing the configuration of an electrospinning device used for electrospinning in Figure 1.

[0025] FIG. 3 is a conceptual diagram conceptually illustrating the structure and capture process of a porous filter fiber for carbon dioxide capture according to one embodiment of the present invention.

[0026] Figure 4 shows SEM images of a filter fiber made only of PMMA without a carbon dioxide capture agent in Experimental Example 1 of the present invention at different humidity levels.

[0027] Figure 5 shows SEM images of filter fibers composed of PMMA and EB-PEI 1 wt% according to humidity in Experimental Example 1 of the present invention.

[0028] Figure 6 shows SEM images of filter fibers composed of PMMA and EB-PEI 20 wt% according to humidity in Experimental Example 1 of the present invention.

[0029] Figure 7 is a BET analysis graph measuring the total porosity of PMMA filter fibers according to relative humidity.

[0030] Figure 8 is a BJH analysis graph showing the average pore diameter of PMMA filter fibers according to relative humidity.

[0031] Figure 9 is a TGA analysis graph measuring the carbon dioxide adsorption capacity of PMMM filter fibers without a carbon dioxide capture agent.

[0032] Figure 10 is a TGA analysis graph measuring the carbon dioxide adsorption capacity of filter fibers composed of PMMA and EB-PEI 1 wt%.

[0033] Figure 11 is a TGA analysis graph measuring the carbon dioxide adsorption capacity of filter fibers composed of PMMA and EB-PEI 20 wt%.

[0034] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components.

[0035] A method for manufacturing a porous filter fiber for carbon dioxide capture according to an embodiment of the present invention will be described in detail below with reference to the attached drawings. FIG. 1 is a flowchart illustrating a method for manufacturing a porous filter fiber for carbon dioxide capture according to an embodiment of the present invention. FIG. 2 is a schematic diagram illustrating an electrospinning apparatus used for the electrospinning of FIG. 1. FIG. 3 is a conceptual diagram conceptually explaining the structure and capture process of a porous filter fiber for carbon dioxide capture according to an embodiment of the present invention.

[0036] First, a first solution containing a first solvent and a polymer support is prepared (S10).

[0037] The first solvent consists of a volatile solvent that evaporates easily due to its high vapor pressure and low boiling point, and the latent heat of vaporization of the first solvent can be utilized when forming nanopores on the surface of the filter fiber using the breath figure method. For example, the first solvent may consist of alcohols such as ethanol, methanol, and isopropanol (IPA); ketones such as acetone and methyl ethyl ketone (MEK); esters such as ethyl acetate and butyl acetate; ethers such as diethyl ether; halogenated hydrocarbons such as chloroform and trichloroethylene; or combinations thereof. Preferably, the first solvent may consist of dichloromethane, dimethylformamide, or a combination thereof.

[0038] The polymer support is a polymer that forms or maintains the structure of the filter fiber, and it is preferable that it be composed of a polymer capable of forming nanopores on the surface of the filter fiber by controlling humidity during the electrospinning process. The polymer support may be composed of at least one selected from the group consisting of, for example, PMMA (Polymethyl methacrylate), PLA (Polylactic acid), and PS (Polystyrene). Preferably, the polymer support may be composed of PMMA (Polymethyl methacrylate). On the other hand, polymers such as PAN (Polyacrylonitrile), PVA (Polyvinyl Alcohol), PVDF (Polyvinylidene Fluoride), PTFE (Polytetrafluoroethylene), cellulose acetate, and gelatin are limited in their use as the polymer support of the present invention because pores are not formed on the surface of the fiber even when humidity is increased during electrospinning.

[0039] For example, the first solution may include dichloromethane, dimethylformamide, and PMMA (polymethyl methacrylate).

[0040] Next, a second solution comprising a second solvent, an amine-based carbon dioxide capture agent, and a structure derivative is prepared (S20).

[0041] The second solvent consists of a volatile solvent that evaporates easily due to its high vapor pressure and low boiling point, and the latent heat of vaporization of the second solvent can be utilized when forming nanopores on the surface of the filter fiber using the breath figure method. For example, the second solvent may consist of alcohols such as ethanol, methanol, and isopropanol (IPA); ketones such as acetone and methyl ethyl ketone (MEK); esters such as ethyl acetate and butyl acetate; ethers such as diethyl ether; halogenated hydrocarbons such as chloroform and trichloroethylene; or combinations thereof. Preferably, the second solvent may consist of ethanol.

[0042] The amine-based carbon dioxide capture agent may consist of at least one selected from the group consisting of, for example, ethylenediamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, hexaethyleneheptamine, polyethyleneimine, polypropyleneimine, and APTES (3-aminopropyltriethoxysilane). Preferably, the amine-based carbon dioxide capture agent may consist of polyethyleneimine. More preferably, the amine-based carbon dioxide capture agent may be polyethyleneimine (EB-PEI) modified by partial substitution with epoxybutane.

[0043] A structural derivative is a compound that forms the framework of a support and serves as a template for forming a specific structure. For example, the structural derivative may consist of at least one selected from the group consisting of tetramethylammonium phosphate (TMAH2PO4), tetraethylammonium phosphate (TEAH2PO4), tetrapropylammonium phosphate (TPAH2PO4), and tetrabutylammonium phosphate (TBAH2PO4). Preferably, the structural derivative may consist of tetraethylammonium phosphate (TEAH2PO4).

[0044] For example, the second solution may include ethanol, polyethyleneimine (EB-PEI) modified by partial substitution with epoxybutane, and tetraethylammonium phosphate (TEAH2PO4).

[0045] Next, the first solution and the second solution are mixed to prepare a base solution (S30).

[0046] Next, a filter fiber (2) is manufactured by electrospinning a base solution at a relative humidity of 30 to 60% using an electrospinning device (100) (S30). Referring to FIGS. 2 and 3, the electrospinning device (100) is a device for manufacturing a nanofilter or filter fiber from a base solution using a high-voltage electric field, and includes a chamber (10), a syringe (20), a needle (30), a power supply (40), a collector (50), and a humidity controller (60).

[0047] The chamber (10) accommodates a syringe (20), a needle (30), and a collector (50).

[0048] The syringe (20) serves as a reservoir for holding the base solution and is connected to a syringe pump (not shown) to control the flow rate of the solution.

[0049] The needle (30) is a metal tip connected to the end of the syringe (20), and an electric field is formed at its end. The diameter of the needle (30) may vary depending on the diameter and structure of the filter fiber (2).

[0050] The power supply (40) induces the filter fiber (2) to be emitted through the needle (30) by applying a high voltage between the needle (30) and the collector (50) to form an electric field in the base solution. For example, the power supply (40) may apply a positive voltage to the needle (30) and a negative voltage or ground to the collector (50).

[0051] The collector (50) is a device for collecting filter fibers (2) emitted from the needle (30), and may be composed of, for example, a plate, a drum, a disk, a substrate, etc.

[0052] The humidity controller (60) controls the relative humidity within the chamber (10). It is preferable for the humidity controller (60) to maintain the relative humidity within the chamber (10) at 30 to 60%. If the relative humidity is less than 30%, the humidity is too low so that fine water droplets are not formed on the surface of the filter fiber (2), and thus nanopores are not formed. If the relative humidity is more than 60%, the humidity is too high so that water droplets on the surface of the filter fiber (2) merge with each other, penetrate into the solution, or flow down, and the pore structure is not maintained.

[0053] When the filter fiber (2) is collected in the collector (50), nano pores (6) are formed on the surface of the filter fiber (2) using the breath figure method. Here, the breath figure method is a technique for manufacturing a nanostructure having a regular porous structure by utilizing the interaction between a water droplet (i.e., condensed water vapor) and a polymer solution. Specifically, in the present invention, a fine water droplet is formed on the surface of the filter fiber (2) using the latent heat of evaporation of a volatile solvent (i.e., a first solvent and a second solvent) contained in a base solution, and the fine water droplet is evaporated to form a nano pore (6) in the place where the fine water droplet was evaporated. Through these nano pores (6), the amine-based carbon dioxide capture agent (8) is exposed to the outside, and the surface area where carbon dioxide and the filter fiber (2) or carbon dioxide and the amine-based carbon dioxide capture agent (8) can come into contact with each other is increased, thereby maximizing the carbon dioxide capture efficiency. In other words, the pore volume and specific surface area of ​​the filter fiber (2) are dramatically increased due to the nano pores (6), thereby maximizing the carbon dioxide collection efficiency.

[0054] After evaporation of the volatile solvent, the filter fiber (2) may contain 1 to 20 wt% of an amine-based carbon dioxide capture agent and 80 to 99 wt% of a polymer support. If the concentration of the amine-based carbon dioxide capture agent, for example EB-PEI, is less than 1 wt%, the capture agent concentration is too low and carbon dioxide is not captured. If the concentration of the amine-based carbon dioxide capture agent, for example EB-PEI, is greater than 20 wt%, the viscosity of the base solution is too high and electrospinning does not occur.

[0055] The filter fiber (2) may have a thickness of 1 to 20 μm. The filter fiber (2) may have a carbon dioxide adsorption capacity of 0.23 to 1.8 mmol / g. In addition, the nanopores (6) may have an average diameter of 16 to 25 nm.

[0056] <Experimental Example 1. Preparation of Porous Filter Fibers>

[0057] A first solution was prepared by adding 7.5g of PMMA (Polymethyl methacrylate) powder to a solvent mixed with 40mL of dichloromethane and 10mL of dimethylformamide, and stirring at 500rpm for 8 hours using a stirrer at room temperature (i.e., 24°C).

[0058] A first synthesis solution containing EB-PEI was prepared by mixing 22.5 wt% of PEI (Polyethylenimine) and 44.9 wt% of ethanol, adding 13.2 wt% of EB (1,2-Epoxybutane), and stirring for more than 6 hours. A second synthesis solution containing TEAH2PO4 was prepared by adding 2.8 wt% of phosphoric acid to 16.6 wt% of TEAOH (Tetraethylammonium hydroxide) and stirring for more than 1 hour. A second solution was prepared by mixing the first synthesis solution and the second synthesis solution and stirring for 1 hour.

[0059] A base solution was prepared by adding the second solution to the first solution and stirring at 500 rpm for 12 hours at room temperature using a stirrer.

[0060] Filter fibers were manufactured by electrospinning a base solution using an electrospinning device (NanoNC, model name ESR200R2D) while maintaining the relative humidity inside the chamber at 20%, 30%, 40%, and 60%, respectively. Here, the distance between the needle and the collector is 12 cm, the voltage applied between the needle and the collector is 14 kV, the temperature inside the chamber is 24 degrees, the flow rate of the syringe pump is 3 mL / h, the diameter of the needle is 18 gauge, and the rotation speed of the collector drum is 100 rpm.

[0061] <Experimental Example 2. SEM image of the filter fiber surface>

[0062] SEM images were obtained by photographing the surface of filter fibers manufactured by changing the manufacturing process of Experimental Example 1.

[0063] Figure 4 shows SEM images at different humidity levels of a filter fiber composed solely of PMMA without a carbon dioxide capture agent in Experimental Example 1 of the present invention, where (a) is at a relative humidity of 20%, (b) is at a relative humidity of 40%, and (c) is at a relative humidity of 60%. That is, the filter fiber in Figure 4 is the case where it was prepared in Experimental Example 1 without the second solution (i.e., EB-PEI). Figure 5 shows SEM images at different humidity levels of a filter fiber composed of PMMA and 1 wt% EB-PEI in Experimental Example 1 of the present invention. Figure 6 shows SEM images at different humidity levels of a filter fiber composed of PMMA and 20 wt% EB-PEI in Experimental Example 1 of the present invention.

[0064] As shown in Figures 4 to 6, almost no nanopores were found when the relative humidity was 20%, but uniform nanopores were found when the relative humidity was 40% and 60%. It was confirmed that the content of the carbon dioxide capture agent EB-PEI did not have a significant effect on the appearance of the nanopores.

[0065] <Experimental Example 3. Porosity and Pore Size of PMMA Support>

[0066] In Experimental Example 1 of the present invention, the porosity and pore size of a filter fiber made only of PMMA without a carbon dioxide capture agent were measured.

[0067] PMMA@RM 20%PMMA@RM 30%PMMA@RM 40%PMMA@RM 60% specific surface area SBET (m 2 / g)0.71 10.38 12.57 18.26 Total porosity Vaba (cm 3 / g, @ P / P0 = 0.994)0.0020.060.070.09 Average pore diameter (nm)15.616.116.324.9

[0068] Figure 7 is a BET analysis graph measuring the total porosity of PMMA filter fibers according to relative humidity. As shown in Figure 7 and Table 1, it was confirmed that the total pore volume also increased as the relative humidity increased. Figure 8 is a BJH analysis graph measuring the average pore diameter of PMMA filter fibers according to relative humidity. As shown in Figure 8 and Table 1, it was confirmed that the average pore diameter also increased as the relative humidity increased.

[0069] However, it was confirmed that when the relative humidity is less than 30%, for example 20%, nanopores are hardly formed, and the specific surface area and total porosity are significantly reduced.

[0070] <Experimental Example 4. Carbon Dioxide Adsorption Capacity of Filter Fibers>

[0071] The carbon dioxide adsorption and desorption amounts were measured for filter fibers manufactured by varying the manufacturing process of Experimental Example 1. The carbon dioxide adsorption and desorption amounts were measured using a thermogravimetric analysis (TGA). TGA measurement is a method for measuring the adsorption and desorption amounts of gas by utilizing the weight change before and after gas injection. The TGA measurement consists of a degassing process to remove gas trapped in the filter fibers, an adsorption process to capture carbon dioxide by flowing carbon dioxide, and a desorption process to desorb the captured carbon dioxide by flowing nitrogen gas. All of these processes were carried out at 50°C for 120 minutes each.

[0072] RM 30%RM 40%RM 60% O2 Adsorption Amount (mmol / g) for PMMA CO2 Adsorption Amount (mmol / g) for PMMA 0.026 0.044 0.059 O2 Adsorption Amount (mmol / g) for PMMA + EB-PEI 1wt% 0.233 0.239 0.255 O2 Adsorption Amount (mmol / g) for PMMA + EB-PEI 20wt% 1.647 1.773 1.783

[0073] Figure 9 is a TGA analysis graph measuring the carbon dioxide adsorption capacity of PMMM filter fibers without a carbon dioxide capture agent. As shown in Figure 9 and Table 2, it was confirmed that the amount of carbon dioxide adsorbed decreased significantly when the filter fibers did not contain a carbon dioxide capture agent. Figure 10 is a TGA analysis graph measuring the carbon dioxide adsorption capacity of filter fibers composed of PMMA and 1 wt% EB-PEI. As shown in Figure 10 and Table 2, it was confirmed that the amount of carbon dioxide adsorbed increased significantly when the filter fibers contained 1 wt% EB-PEI, a carbon dioxide capture agent. Furthermore, it was confirmed that as the relative humidity (RM) increased, the total porosity of the filter fibers also increased, and the amount of carbon dioxide adsorbed also increased.

[0074] Figure 11 is a TGA analysis graph measuring the carbon dioxide adsorption capacity of a filter fiber composed of PMMA and 20 wt% EB-PEI. As shown in Figure 11 and Table 2, it was confirmed that the amount of carbon dioxide adsorbed increased as the concentration of EB-PEI, a carbon dioxide capture agent, in the filter fiber increased. Furthermore, it was confirmed that as the relative humidity (RM) increased, the total porosity of the filter fiber also increased, and the amount of carbon dioxide adsorbed also increased.

[0075] Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention may be implemented in other specific forms without changing its technical concept or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive.

[0076] - Explanation of the symbols -

[0077] 2: Filter fiber

[0078] 4: Polymer support

[0079] 6: Nanopores

[0080] 8: Carbon dioxide capture agent

[0081] 10: Chamber

[0082] 20: Syringe

[0083] 30: Needles

[0084] 40: Power supply

[0085] 50: Collector

[0086] 60: Humidity controller

[0087] 100: Electrospinning device

Claims

1. A step of preparing a first solution containing a polymer support; A step of preparing a second solution containing an amine-based carbon dioxide capture agent; A step of preparing a base solution by mixing the first solution and the second solution; A step of manufacturing filter fibers by electrospinning the base solution at a relative humidity of 30 to 60%; and A method for manufacturing a porous filter fiber for carbon dioxide capture, comprising the step of forming nanopores on the surface of the filter fiber using a breath figure method.

2. In Paragraph 1, A method for manufacturing a porous filter fiber for carbon dioxide capture, characterized in that the step of forming the nanopores involves forming fine water droplets on the surface of the filter fiber using the latent heat of evaporation of a volatile solvent contained in the base solution, and evaporating the fine water droplets to form the nanopores in the place where the fine water droplets were evaporated.

3. In Paragraph 1, A method for manufacturing a porous filter fiber for carbon dioxide capture comprising 1 to 20 wt% of the amine-based carbon dioxide capture agent.

4. In Paragraph 1, A method for manufacturing a porous filter fiber for carbon dioxide capture, characterized in that the polymer support is at least one selected from the group consisting of PMMA (Polymethyl methacrylate), PLA (Polylactic acid), and PS (Polystyrene).

5. In Paragraph 1, A method for manufacturing a porous filter fiber for carbon dioxide capture, characterized in that the above-mentioned amine-based carbon dioxide capture agent is at least one selected from the group consisting of ethylenediamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, hexaethyleneheptamine, polyethyleneimine, polypropyleneimine, and APTES (3-aminopropyltriethoxysilane).

6. In Paragraph 1, The first solution above comprises dichloromethane, dimethylformamide, and PMMA (polymethyl methacrylate), and A method for manufacturing a porous filter fiber for carbon dioxide capture, wherein the second solution comprises polyethyleneimine (EB-PEI) modified by partial substitution with ethanol and epoxybutane and tetraethylammonium phosphate (TEAH2PO4).

7. In Paragraph 1, A method for manufacturing a porous filter fiber for carbon dioxide capture, characterized in that the filter fiber has a thickness of 1 to 20 μm.

8. In Paragraph 1, A method for manufacturing a porous filter fiber for carbon dioxide capture, characterized in that the filter fiber has a carbon dioxide adsorption capacity of 0.23 to 1.8 mmol / g.

9. In Paragraph 1, A method for manufacturing a porous filter fiber for carbon dioxide capture, characterized in that the nanopores have an average diameter of 16 to 25 nm.

10. A porous filter fiber for carbon dioxide capture manufactured according to any one of claims 1 to 9.

Images