KR20190010764A - Method of manufacturing magnetic porous membrane and magnetic porous membrane thereby - Google Patents

Abstract

The present invention provides a manufacturing method of a magnetic porous membrane and a magnetic porous membrane manufactured by the same which can provide a high filtration rate. The manufacturing method of a magnetic porous membrane comprises: a step of preparing a porous membrane template with a plurality of first through holes having a first inner diameter; a step of preparing a seed layer having a base unit deposited on one surface of the porous membrane template to cover a portion of the first through holes and formed to have a second inner diameter smaller than the first inner diameter; a step of preparing nanotubes of a magnetic metal material which is deposited and formed on an upper portion of the base unit to be extended from an inner side of the first through holes in a longitudinal direction of the first through holes, and has an inner diameter corresponding to the second inner diameter; a step of removing the porous membrane template; a step of removing the seed layer; and a step of tightly coupling the nanotubes in a horizontal direction by magnetism to form a porous membrane.

Description

TECHNICAL FIELD [0001] The present invention relates to a method of manufacturing a porous membrane having magnetic properties and a porous membrane having a magnetic property,

The present invention relates to a method for producing a porous membrane having magnetic properties and a porous membrane having magnetic properties produced thereby. More particularly, the present invention relates to a method for producing a porous membrane having magnetic properties capable of providing a high filtration rate, To a porous film.

Porous membranes have been widely applied to realize filtration functions in medicine, food, semiconductor, and water treatment fields.

Generally, membranes can be divided into symmetrical and asymmetric membranes in cross-sectional structure. The symmetric membrane is easily contaminated on the surface of the membrane by the particles in the raw water, the permeation flow rate is decreased, and the service life is deteriorated.

On the other hand, the asymmetric membrane may be composed of a very dense selective layer at a certain position in the membrane section, and a porous layer located outside the selective layer. The selective layer has high selectivity to remove particles of a certain size or more, and the porous layer can maintain the mechanical strength and realize a good selective permeation flow rate. Therefore, research on asymmetric membranes is relatively active.

1 is an illustration showing a conventional porous membrane.

As shown in FIG. 1, the conventional porous membrane 10 has a plurality of pores 11 formed in a thickness direction.

In the manufacturing techniques to date, the pores 11 of the porous membrane 10 have been produced with diameters of tens to hundreds of nanometers. However, it is necessary to further reduce the diameter of the pores 11 in order to filter out even smaller particles. Accordingly, there is a demand for a technique for manufacturing a porous membrane having a pore having a diameter of several nanometers.

Korean Patent Publication No. 2012-0123057 (Published on 11.07.2012)

In order to solve the above problems, a technical problem to be solved by the present invention is to provide a method of manufacturing a porous membrane having magnetic properties capable of providing a high filtration rate and a porous membrane having the magnetic property produced thereby.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. There will be.

According to an aspect of the present invention, there is provided a method for fabricating a porous membrane, comprising: providing a porous membrane template having a plurality of first through holes having a first inner diameter; Providing a seed layer on one surface of the porous membrane template, the seed layer having a base portion deposited to cover a portion of each of the first through holes and having a second inner diameter smaller than the first inner diameter; Providing a nanotube of magnetic metal material having an inner diameter corresponding to the second inner diameter and formed to extend in a longitudinal direction of the first through hole from an inner side of the first through hole to an upper portion of the base; Removing the porous membrane template; Removing the seed layer; And each of the nanotubes is tightly coupled to each other in a horizontal direction by magnetism to produce a porous film.

According to another aspect of the present invention, there is provided a method for manufacturing a porous membrane, comprising: providing a porous membrane template having a plurality of first through holes having a first inner diameter; Providing a seed layer on one surface of the porous membrane template, the seed layer having a base portion deposited to cover a portion of each of the first through holes and having a second inner diameter smaller than the first inner diameter; Providing a complementary layer deposited on an inner peripheral surface of the first through hole and having a third inner diameter; Providing nanotubes of magnetic metal material having an inner diameter corresponding to the second inner diameter and formed to extend in the longitudinal direction of the complementary layer on the upper portion of the base in the complementary layer; Removing the porous membrane template and the complementary layer; Removing the seed layer; And each of the nanotubes is tightly coupled to each other in a horizontal direction by magnetism to produce a porous film.

In one embodiment of the present invention, the porous membrane produced in the step of forming the porous membrane includes a first porous membrane having an inner diameter corresponding to the second inner diameter formed in each of the nanotubes, And a space formed between each of the nanotubes.

In an embodiment of the present invention, after the step of forming the porous membrane, an additional step of adding a magnetic metal material having at least one surface of the porous membrane to the first through hole and a third through hole smaller than the second through hole, And a step of providing a porous film may be further included.

According to another aspect of the present invention, there is provided a method for manufacturing a porous membrane, comprising: providing a porous membrane template having a plurality of first through holes having a first inner diameter; Providing a seed layer having a base portion on one surface of the porous membrane template, the base layer being deposited so that each of the first through holes is clogged; Providing a nano-rod of magnetic metal material deposited on an upper portion of the base portion inside the first through-hole to be filled in a longitudinal direction of the first through-hole; Removing the porous membrane template; Removing the seed layer; And each of the nano-rods is tightly coupled to each other in a horizontal direction by magnetic force to produce a porous film.

In an embodiment of the present invention, the porous membrane produced in the step of forming the porous membrane may have a permeable hole formed as a space formed between each of the nanotubes closely coupled to each other.

In an embodiment of the present invention, after the step of forming the porous membrane, an additional porous membrane of a magnetic metal material is provided on at least one surface of the porous membrane, the porous membrane having an additional permeable hole smaller than the permeable hole .

According to another aspect of the present invention, there is provided a magnetic porous membrane produced by a method of manufacturing a magnetic porous membrane.

According to the embodiment of the present invention, the permeable holes formed in the porous membrane may be formed to be smaller than the pores of the conventional porous membrane, so that even smaller particles can be filtered.

Further, according to the embodiment of the present invention, the interval between adjacent first through holes can be formed closer to each other than the interval between adjacent pores in the conventional porous membrane, and can be formed more closely. Further, since the first through holes are formed closely, the flow resistance of the fluid to be filtered can be reduced and the pore density can be increased, and thus a high permeability and a high filtration rate can be realized.

It should be understood that the effects of the present invention are not limited to the effects described above, but include all effects that can be deduced from the description of the invention or the composition of the invention set forth in the claims.

1 is an illustration showing a conventional porous membrane.
FIG. 2 is a flowchart illustrating a method of manufacturing a magnetic porous membrane according to a first embodiment of the present invention.
3 is a view illustrating an example of a process for manufacturing a magnetic porous membrane according to a first embodiment of the present invention.
4 is a view illustrating an example of a method of manufacturing a magnetic porous membrane according to a first embodiment of the present invention.
5 is a flowchart illustrating a method of manufacturing a magnetic porous membrane according to a second embodiment of the present invention.
6 is a view illustrating an example of a process for manufacturing a porous film having magnetic properties according to a second embodiment of the present invention.
7 is a view illustrating an example of a method of manufacturing a magnetic porous membrane according to a second embodiment of the present invention.
8 is a flowchart illustrating a method of manufacturing a porous film having magnetic properties according to a third embodiment of the present invention.
FIG. 9 is a view illustrating a process for manufacturing a porous film having magnetic properties according to a third embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" (connected, connected, coupled) with another part, it is not only the case where it is "directly connected" "Is included. Also, when an element is referred to as " comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

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

FIG. 2 is a flow chart showing a method of manufacturing a magnetic porous membrane according to a first embodiment of the present invention. FIG. 3 is a view illustrating a process of manufacturing a magnetic porous membrane according to a first embodiment of the present invention And FIG. 4 is an exemplary view showing a method of manufacturing a porous film having magnetic properties according to a first embodiment of the present invention.

As shown in FIGS. 2 to 4, the method of manufacturing a porous membrane having magnetic properties according to an embodiment of the present invention includes the steps of forming a porous membrane template 200 (FIG. 2) in which a plurality of first through holes 201 having a first inner diameter D1 are formed, (S110) may be provided.

In step S110, the porous membrane template 200 may be made of one or more materials of anodic aluminum oxide (AAO) and polycarbonate (PC). When the porous membrane template 200 is made of a polycarbonate material, the porous membrane template 200 can be manufactured by a track-etch method. The first through hole 201 formed in the porous membrane template 200 may have a first inner diameter D1 and may be formed entirely in the porous membrane template 200.

The porous membrane having a magnetic property is deposited on one surface of the porous membrane template 200 so as to cover a portion of each of the first through holes 201 and has a second inside diameter D1 smaller than the first inside diameter D1 And a step S220 of providing a seed layer 210 having a base 211 formed to have a predetermined depth D2.

In step S120, the seed layer 210 may be provided on one surface of the porous membrane template 200 as a whole. The seed layer 210 may be formed of a metal material and may be formed by vacuum deposition, which is a method of heating a small piece of metal in a vacuum to adhere the vapor to an object surface.

Referring to FIG. 4A, in the vacuum deposition process, the evaporation molecules generated by evaporation of the metal to be formed as the seed layer 210 are deposited on the inner surface of the vacuum container 300 by vapor deposition on one surface of the porous membrane template 200 . In the edge portion of the first through hole 201, evaporation molecules can be extended to the inside of the first through hole 201, thereby forming the seed layer 210 having the base portion 211 have. The size of the second inner diameter D2 of the base portion 211 can be controlled by controlling the deposition time of the evaporation molecules in the vacuum deposition process.

The method of manufacturing a porous film having magnetic properties is formed by depositing the first through hole 201 on the upper portion of the base portion 211 so as to extend in the longitudinal direction of the first through hole 201, And a step S130 of providing a nanotube 220 made of a magnetic metal material having an inner diameter D3 corresponding to the inner diameter D2.

In step S130, the magnetic metal may be made of a ferromagnetic material, and the ferromagnetic material may include one or more of nickel (Ni), cobalt (Co), and iron (Fe). The nanotubes 220 may be formed by an electroplating method.

Referring to FIG. 4 (b), an electrolytic solution 311 containing a magnetic metal, which is to be formed of the nanotubes 220, may be stored in the water tank 310. The porous membrane template 200 may be contained in the electrolyte solution 311 with the seed layer 210 facing upward. At this time, the porous membrane template 200 may contain at least the upper part of the seed layer 210 so as to correspond to the surface of the electrolyte solution 311. Thus, metal deposition can be performed on the lower surface of the base portion 211. When the seed layer 210 is not immersed in the electrolyte solution 311, deposition of metal may not be performed in the base part 211. When the seed layer 210 is deeply immersed in the electrolyte solution 311, 210 may be unnecessarily metallized.

The seed layer 210 and the porous membrane template 200 may be used as a negative electrode and the metal portion 321 of the nanotube 220 contained in the electrolyte 311 may be used as a positive electrode. In the electroplating process, a reduction reaction occurs, and a magnetic metal is deposited on the bottom of the base 211 and the inner circumferential surface of the first through hole 201 to form the nanotubes 220. The inner diameter D3 of the nanotube 220 may correspond to the second inner diameter D2 and the inner diameter D3 of the nanotube 220 may be the same as the deposition time of the magnetic metal in the electroplating process Lt; / RTI >

On the other hand, the above-described embodiments are illustrative, and therefore the process is not necessarily limited in the above-described manner. That is, the seed layer 210 does not necessarily need to be directed upward. The seed layer 210 may be covered with a cover so as not to deposit the metal on the seed layer 210, or may be covered with a separate housing to directly contact the electrolyte 311 Other methods can be applied. For example, if the above-described processing is possible, a variety of methods such as a method in which the seed layer is brought into close contact with the bottom of the tank can be applied.

The method of manufacturing a magnetic porous membrane may include a step (S140) in which the porous membrane template 200 is removed.

In step S140, the porous membrane template 200 may be removed by an etching method, and preferably, may be removed by a wet etching method. When the porous membrane template 200 is made of anodized aluminum, a strong base etchant may be used as the etchant. Strong base etchants may include, but are not necessarily limited to, potassium hydroxide (KOH) and sodium hydroxide (NaOH). When the porous membrane template 200 is made of polycarbonate, an etchant containing toluene may be used as the etchant, but the present invention is not limited thereto. The etchant used to remove the porous membrane template 200 is preferably one that does not affect the nanotubes 220.

In addition, the method of manufacturing a magnetic porous film may include a step (S150) in which the seed layer 210 is removed.

In step S150, the seed layer 210 may be removed by a strongly acidic etching agent. As the strong acidic etching agent, it is preferable to use one that does not affect the nanotubes 220.

The method of manufacturing a magnetic porous membrane may include a step S160 in which each of the nanotubes 220 is tightly coupled to each other in a horizontal direction by magnetism to generate a porous membrane 400.

In step S160, when the seed layer 210 is removed, each of the nanotubes 220 may be closely coupled to each other by magnetism, and the nanotubes 220 may be generated as a porous film 400. The porous membrane 400 thus formed has a first through hole 401 formed in the nanotube 220 with an inner diameter D3 corresponding to the second inner diameter D2 and a second through hole And a second through hole 402 made of a space formed between the tubes 220.

1, the first permeable hole 401 and the second permeable hole 402 of the porous membrane 400 according to the present embodiment are different from those of the conventional porous membrane 10, May be formed smaller than the pores (11) of the porous membrane (10). According to the present embodiment, the first through hole 401 and the second through hole 402 can be formed to have a size of several nanometers, thereby enabling filtering to even smaller particles.

Further, the distance between adjacent first through holes 401 can be formed closer to the spacing between adjacent pores 11 in the conventional porous membrane 10, and can be formed more closely. If the first through holes 401 are closely formed, the flow resistance of the fluid to be filtered can be reduced. As described above, the porosity (porosity) of the porous membrane 400 according to the present embodiment can be increased, and thus a high permeability and a high filtration rate can be realized.

In addition, a method of manufacturing a porous membrane having magnetic properties is a method of manufacturing a magnetic porous membrane having a first through hole 401 and a third through hole 501 smaller in size than the second through hole 402 on at least one surface of the porous membrane 400, (S170) in which an additional porous film 500 made of a material is provided.

In step S170, the additional porous film 500 may be made of a magnetic metal material and may be tightly coupled to the porous film 400. [ The additional porous membrane 500 may support the porous membrane 400 to help the porous membrane 400 maintain a stable shape. The additional porous film 500 may have a mesh shape.

FIG. 5 is a flowchart illustrating a method of manufacturing a magnetic porous membrane according to a second embodiment of the present invention. FIG. 6 is a view illustrating a process of manufacturing a magnetic porous membrane according to a second embodiment of the present invention And FIG. 7 is an exemplary view showing a method of manufacturing a magnetic porous membrane according to a second embodiment of the present invention. In this embodiment, the shapes of the nanotubes and the processes related thereto may be different, and the other structures are the same as those described in the first embodiment, and thus a detailed description thereof will be omitted.

5 to 7, a method of manufacturing a porous membrane having magnetic properties includes the steps of providing a porous membrane template 200 having a plurality of first through holes 201 having a first inner diameter D1, (S1100) and a second inner diameter (D2) deposited on one surface of the porous membrane template (200) to cover a portion of each first through hole (201) and smaller than the first inner diameter (D1) And a step S1200 in which a seed layer 210 having a base portion 211 is provided. Steps S1100 and S1200 may be the same as steps S110 and S120 of the first embodiment described above.

The method of manufacturing a porous film having magnetic properties may include a step S1300 in which a complementary layer 1250 having a third inner diameter D4 is formed by vapor deposition on the inner peripheral surface of the first through hole 201 .

In step S1300, the complementary layer 1250 may be formed of a metal material or a conductive polymer material, and may be formed by an electroplating method.

Referring to FIG. 7A, an electrolytic solution 312 containing ions of a metal or a conductive polymer to be formed as a complementary layer 1250 may be stored in the water tank 310. The porous membrane template 200 may be contained in the electrolyte solution 312 with the seed layer 210 facing upward. At this time, the porous membrane template 200 may contain at least the upper part of the seed layer 210 corresponding to the surface of the electrolyte solution 312. The seed layer 210 and the porous membrane template 200 may be used as the cathode and the member 322 of the complementary layer 1250 that is contained in the electrolyte 312 may be used as the anode. In the electroplating process, a reduction reaction occurs, and a metal or a conductive polymer is deposited on the lower portion of the base 211 and the inner circumferential surface of the first through hole 201 to form a complementary layer 1250. The size of the third inner diameter D4 of the complementary layer 1250 can be controlled by controlling the deposition time of the metal or conductive polymer in the electroplating process.

On the other hand, the above-described embodiments are illustrative, and therefore the process is not necessarily limited in the above-described manner. That is, the seed layer 210 does not necessarily need to be directed upward, and a portion of the seed layer 210 where the metal or conductive polymer is not deposited may be covered with a cover, or may be covered with a separate housing, Other methods can be applied if they are not in direct contact. For example, if the above-described processing is possible, a variety of methods such as a method in which the seed layer is brought into close contact with the bottom of the tank can be applied.

The method of manufacturing a porous film having magnetic properties is formed by vapor deposition in the complementary layer 1250 so as to extend in the longitudinal direction of the complementary layer 1250 at the upper portion of the base portion 211 and to correspond to the second inner diameter D2 And a step S1400 of providing a nanotube 1260 made of a magnetic metal having an inner diameter D5.

Referring to FIG. 7 (b), an electrolytic solution 313 containing ions of a magnetic metal to be formed by the nanotubes 1260 may be stored in the water tank 310. The porous membrane template 200 may be contained in the electrolyte solution 313 with the seed layer 210 facing upward. At this time, the porous membrane template 200 may contain at least the upper part of the seed layer 210 so as to correspond to the surface of the electrolyte solution 313. The seed layer 210 and the porous membrane template 200 may be used as a negative electrode and the metal portion 323 of the nanotube 1260 contained in the electrolyte 313 may be used as a positive electrode. In the electroplating process, a reduction reaction takes place, and a magnetic metal is deposited on the lower portion of the base portion 211 and the inner peripheral surface of the complementary layer 1250 to form the nanotube 1260. The inner diameter D5 of the nanotube 1260 may correspond to the second inner diameter D2 and the inner diameter D5 of the nanotube 1260 may be equal to the deposition time of the magnetic metal in the electroplating process Lt; / RTI >

Thereafter, the step of removing the porous membrane template 200 and the complementary layer 1250 (S1500) may proceed.

When the porous membrane template 200 and the complementary layer 1250 are both made of a metal material or a polymer material in step S 1500, the porous membrane template 200 is etched using a metal material or an etching solution capable of etching a polymer material, And the complementary layer 1250 can be removed at the same time. When the porous membrane template 200 is made of a metal material and the complementary layer 1250 is made of a polymer material or in the opposite case, the porous membrane template 200 and the complementary layer 1250 are sequentially Can be removed.

Thereafter, step S1600 in which the seed layer is removed and step S1700 in which each of the nanotubes 1260 is tightly coupled to each other in the horizontal direction by magnetic force to produce a porous film 1400 can be performed. Steps S1600 and S1700 may be the same as steps S150 and S160 of the first embodiment described above.

In step S1700, when the seed layer 210 is removed, the respective nanotubes 1260 can be tightly coupled to each other by magnetism and can be formed as a porous film 1400. [ The porous membrane 1400 thus formed has a first through hole 1401 formed in the nanotube 1260 with an inner diameter D5 corresponding to the second inner diameter D2 and a second through hole And a second through hole 1402 made of a space formed between the tubes 1260.

An additional porous film 1500 made of a magnetic metal material having a first through hole 1401 and a third through hole 1501 smaller than the second through hole 1402 is formed on at least one side of the porous film 1400 (S1800). The step S1800 may be the same as the step S170 of the first embodiment described above.

FIG. 8 is a flowchart illustrating a method of manufacturing a magnetic porous membrane according to a third embodiment of the present invention, and FIG. 9 is a view illustrating a process of manufacturing a magnetic porous membrane according to a third embodiment of the present invention . In this embodiment, there is a difference between the nanotubes and the configurations related thereto, and the other configurations are the same as those of the first embodiment described above, so a detailed description will be omitted.

8 and 9, a method of manufacturing a porous membrane having magnetic properties includes the steps of providing a porous membrane template 200 having a plurality of first through holes 201 having a first inner diameter D1, (S2110). Step S2110 may be the same as Step S110 of the first embodiment described above.

Thereafter, a step S2120 may be performed in which a seed layer 2210 having a base portion 2211 is deposited on one surface of the porous membrane template 200 so that the respective first through holes 201 are clogged.

In step S2120, the seed layer 2210 may be provided on one surface of the porous membrane template 200 as a whole. For this, in the electroplating process, a reduction reaction occurs and a metal is deposited on one surface of the porous membrane template 200, the base portion 2211 is formed such that the deposition of the metal is performed on the inner circumferential surface of the first through- And may be formed by extending and connecting to the inside of the through hole 201.

Thereafter, a nano-rod 2240 made of a magnetic metal material is deposited on the upper portion of the base portion 2211 from the inside of the first through hole 201 to be filled in the longitudinal direction of the first through hole 201 (S2130) may proceed.

In step S2130, a reduction reaction occurs in the electroplating process, and a nano rod 2240 may be provided by depositing magnetic metal on the lower part of the base part 2211 and the inner peripheral surface of the first through hole 201. The nano-rod 2240 may be formed to be filled in the first through hole 201.

The porous membrane template 200 may be removed (S2140) and the seed layer (2210) may be removed (2150). Steps S2140 and S2150 may be the same as steps S140 and S150 of the first embodiment described above.

Thereafter, step (S2160) may be performed in which the respective nano-rods 2240 are tightly coupled to each other in the horizontal direction by the magnetic force to generate the porous film 2400. The porous membrane 2400 formed in step S2160 may have a permeability hole 2241 formed as a space formed between the respective nano-rods 2240 tightly coupled with each other.

In addition, the method of manufacturing a porous film having magnetic properties may further include, after step S2160, an additional porous film 2500 of a magnetic metal material having at least one side of the porous film 2400 with an additional through hole 2501 smaller than the through hole 2241 (Step S2170).

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

200: Porous Membrane Template
201: first through hole
210, 2210: seed layer
211, 2211:
220,1260: nanotubes
400, 1400, 2400: Porous membrane
401, 1401: first permeable hole
402, 1402:
500, 1500, 2500: Additional porous membrane
1250: Complement layer
2240: Nano rod

Claims (8)

Providing a porous membrane template on which a plurality of first through holes having a first inner diameter are formed;
Providing a seed layer on one surface of the porous membrane template, the seed layer having a base portion deposited to cover a portion of each of the first through holes and having a second inner diameter smaller than the first inner diameter;
Providing a nanotube of magnetic metal material having an inner diameter corresponding to the second inner diameter and formed to extend in a longitudinal direction of the first through hole from an inner side of the first through hole to an upper portion of the base;
Removing the porous membrane template;
Removing the seed layer; And
And each of the nanotubes is tightly coupled to each other in a horizontal direction by magnetism to produce a porous film. Providing a porous membrane template on which a plurality of first through holes having a first inner diameter are formed;
Providing a seed layer on one surface of the porous membrane template, the seed layer having a base portion deposited to cover a portion of each of the first through holes and having a second inner diameter smaller than the first inner diameter;
Providing a complementary layer deposited on an inner peripheral surface of the first through hole and having a third inner diameter;
Providing nanotubes of magnetic metal material having an inner diameter corresponding to the second inner diameter and formed to extend in the longitudinal direction of the complementary layer on the upper portion of the base in the complementary layer;
Removing the porous membrane template and the complementary layer;
Removing the seed layer; And
And each of the nanotubes is tightly coupled to each other in a horizontal direction by magnetism to produce a porous film. 3. The method according to claim 1 or 2,
Wherein the porous membrane formed in the step of forming the porous membrane includes a first permeable hole formed in each of the nanotubes and having an inner diameter corresponding to the second inner diameter, And a second through hole made of a space formed in the second through hole. The method of claim 3,
After the step of producing the porous film
Further comprising the step of providing an additional porous membrane made of a magnetic metal material having at least one side of the porous membrane and having a smaller size than the first permeable hole and the third permeable hole. A method for producing a porous film. Providing a porous membrane template on which a plurality of first through holes having a first inner diameter are formed;
Providing a seed layer having a base portion on one surface of the porous membrane template, the base layer being deposited so that each of the first through holes is clogged;
Providing a nano-rod of magnetic metal material deposited on an upper portion of the base portion inside the first through-hole to be filled in a longitudinal direction of the first through-hole;
Removing the porous membrane template;
Removing the seed layer; And
And each of the nano-rods is tightly coupled to each other in a horizontal direction by magnetic force to produce a porous film. 6. The method of claim 5,
Wherein the porous film formed in the step of forming the porous film has a through hole composed of a space formed between each of the nanotubes which are closely coupled to each other. The method of claim 3,
After the step of producing the porous film
Further comprising the step of providing an additional porous membrane of a magnetic metal material having at least one side of the porous membrane with an additional permeable hole smaller than the permeable hole. A magnetic porous film produced by the method of manufacturing a magnetic porous film according to any one of claims 1, 2, and 5.

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