KR20210055999A - fiber filter and method of manufacturing the same and fluid purification apparatus using the same - Google Patents

Abstract

The present invention relates to a fiber filter having an antibacterial photocatalyst surface, a method for manufacturing the same, and a fluid purification device using the same. According to the present invention, the fiber filter comprises: a filter body in the form of a fabric sheet in which fiber yarns are accumulated to have a through hole; a transition metal adhesive layer bonded to the surface of the fiber yarn with a transition metal; a photocatalyst layer formed by oxidizing the transition metal adhesive layer on the transition metal adhesive layer; and silver nanoparticles dispersedly disposed in the photocatalyst layer. According to the fiber filter having an antibacterial photocatalyst surface, a method for manufacturing the same, and a fluid purification device using the same, provided is the advantage of improving the antibacterial properties of the fiber filter while improving the adhesion between the fiber yarn and the photocatalyst layer, and improving the light resistance and electromagnetic wave shielding performance of the photocatalyst layer.

Description

Fiber filter having an antimicrobial photocatalytic material surface, and a method for manufacturing the same, and a fluid purification apparatus using the same

The present invention relates to a fiber filter having an antimicrobial photocatalytic material surface, a method of manufacturing the same, and a fluid purification device using the same, and in detail, a fiber filter having an antimicrobial photocatalytic material surface having an antimicrobial photocatalytic material surface improving the adhesion of the photocatalytic layer to the fiber yarn, and the same It relates to a manufacturing method and a fluid purification device using the same.

A method in which a photocatalytic material is coated in order to increase antibacterial properties on a fiber filter used for air purification is used, and variously disclosed such as Korean Patent No. 10-1351485.

In addition, a method of coating a photocatalyst containing silver (Ag) nanoparticles on the fiber filter is also used to impart antibacterial properties and photocatalytic properties to a flexible fiber filter formed with a filtration function of a polymer material.

However, the method of coating the photocatalyst on the fiber filter by the physical vapor deposition method has the disadvantage that the manufacturing cost is high and the inside of the filter is not coated, and the sol-gel coating, which is relatively inexpensive, has the disadvantage of being easily peeled off due to weak adhesion. have. In addition, since hydrothermal synthesis and chemical vapor deposition must be performed at high temperatures, there is a problem that cannot be applied to fibers made of a polymer material having a low softening point.

In addition, as a method of coating an antimicrobial photocatalyst layer on a flexible fiber filter, antibacterial properties containing organic adhesive materials such as silane-based, epoxy-based, and acryl-based resins are used to reinforce the adhesion to the fiber surface. There is also a method of wet coating a photocatalytic material. In this case, since the organic adhesive material has low light resistance, the photocatalyst performance deteriorates over time, and there is a problem that peeling occurs due to deformation, and the antibacterial photocatalyst material is covered with an organic material in the coating process, resulting in poor photocatalytic performance. There is a problem to drop.

As another method, in the case of implementing a fiber filter whose surface is covered with an antimicrobial photocatalyst layer by electrospinning based on a solution containing silver and a photocatalyst precursor material, the antimicrobial photocatalyst layer is not uniformly coated, resulting in a peeling phenomenon. There is a problem in that the photocatalyst performance is degraded because it is severe or the photocatalyst layer is buried in the fibrous material.

The present invention was invented to improve the above problems, and a fiber filter having an antimicrobial photocatalytic material surface capable of improving both the adhesion of the photocatalyst layer to the surface of the flexible fiber filter, light resistance, and electromagnetic wave shielding performance, and a method for manufacturing the same, and the same It is an object of the present invention to provide a fluid purification device used.

In order to achieve the above object, a fiber filter having an antimicrobial photocatalytic material surface according to the present invention comprises: a filter body in the form of a fabric sheet by accumulating fiber yarns having through holes; A transition metal adhesive layer adhered to the surface of the fiber yarn with a transition metal; A photocatalyst layer formed by oxidizing the transition metal adhesive layer on the transition metal adhesive layer; It includes; silver nanoparticles dispersed and disposed in the photocatalyst layer.

Preferably, the transition metal adhesive layer includes a first transition metal adhesive layer formed of Ni on the fiber yarn, and a second transition metal adhesive layer formed of Ti on the first transition metal adhesive layer, and the photocatalyst layer is the second transition metal adhesive layer. It is formed by oxidizing the metal adhesive layer.

In addition, in order to achieve the above object, the method of manufacturing a fiber filter having an antimicrobial photocatalytic material surface according to the present invention is a. Forming a transition metal adhesive layer with a transition metal on the surface of the fiber yarns of the filter body integrated with the fiber yarns having through holes; I. And forming a photocatalyst layer in which silver nanoparticles are dispersed by oxidizing the surface of the transition metal adhesive layer.

Preferably, a pretreatment step of pretreating before forming the transition metal adhesive layer on the filter body in the affixing step is included, and the pretreatment step is after wet cleaning the filter body, and then the surface is cleaned with an acid-based etchant. Finely etching; Immersing the filter body in a tin ionic liquid to attach tin ions to the surface to sensitively treat the surface; Activating the surface by immersing the filter body in a palladium ionic liquid to reduce the attached tin ions to palladium ions; And forming a palladium metal seed layer by immersing the filter body in a reducing agent solution.

In addition, in order to achieve the above object, the fluid purification apparatus according to the present invention includes: a tube body having a flow path communicated in the front and rear directions; A light-emitting module mounted on the upper and lower portions of the tube to emit ultraviolet or visible light; A plurality of the fiber filters installed to extend from the bottom surface of the tube to the ceiling inclined with respect to the central axis of the flow path along the longitudinal direction of the tube, and disposed to be spaced apart from each other along the extending direction of the flow path; And a flow rate generation module that generates a blowing force through which fluid can be transferred into the tube body.

According to a fiber filter having an antimicrobial photocatalytic material surface according to the present invention, a method of manufacturing the same, and a fluid purification device using the same, the antibacterial property of the fiber filter is improved while improving the adhesion between the fiber yarn and the photocatalyst layer, and the light resistance and electromagnetic wave shielding performance of the photocatalyst layer It also provides the advantage of improving.

1 is a view schematically showing a fiber filter according to the present invention,
2 is a process chart showing the manufacturing process of the fiber filter according to the present invention,
3 is a photograph of the filter body formed through the process of forming the filter body of FIG. 2,
4 is an enlarged photograph of FIG. 3,
5 is a cross-sectional view showing a fluid purification apparatus to which a fiber filter according to the present invention is applied.

Hereinafter, a fiber filter having an antimicrobial photocatalytic material surface, a method of manufacturing the same, and a fluid purification apparatus using the same according to a preferred embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a view schematically showing a fiber filter according to the present invention.

Referring to FIG. 1, the fiber filter 10 according to the present invention includes a filter body 20, a transition metal adhesive layer 40, a photocatalyst layer 50, and silver nanoparticles 60.

The filter body 20 has a through hole, and the fiber threads 30 are integrated to form a fabric sheet.

The filter body 20 is formed in a structure in which fiber yarns generated by electrospinning any one of a polymer material, a carbon material, and a metal in a manner such as melt-blown are randomly stacked to form a fiber yarn 30 It is possible to filter foreign substances larger than the through holes formed between them.

The transition metal adhesive layer 40 is a layer adhered to the surface of the fiber yarn 30 with a transition metal.

The transition metal adhesive layer 40 is formed of at least one of Ti, Ni, Cu, and Zn.

The transition metal adhesive layer 40 may be formed of a plurality of layers of different materials. Preferably, the transition metal adhesive layer is formed of a first transition metal adhesive layer formed of nickel (Ni) on the fiber yarn 30 and a second transition metal adhesive layer formed of titanium (Ti) on the first transition metal adhesive layer.

The photocatalyst layer 50 is a layer formed by oxidizing the transition metal adhesive layer on the transition metal adhesive layer 40. When the transition metal adhesive layer 40 is formed in a structure having a second transition metal adhesive layer formed of titanium (Ti) on the first transition metal adhesive layer formed of nickel (Ni) as described above, the photocatalyst layer 50 is titanium ( The second transition metal adhesive layer formed of Ti) may be formed by oxidation treatment.

On the other hand, when the photocatalyst layer 50 _{is formed of any one of photocatalysts such as titanium dioxide (TiO 2} ), NiO, and ZnO, when light is irradiated, electrons (e-) and holes (eg, electrons with positive charge) are formed on the surface. Particles) are formed, and electrons react with oxygen on the surface of the photocatalyst to form superoxide anions (O ₂ -). In addition, holes react with moisture existing in the air to form hydroxyl radicals (neutral OH). Since the hydroxyl radicals generated at this time have excellent ability to oxidatively decompose powerful organic substances, they decompose odorous substances, viruses, bacteria, etc., which are always present in the air, and turn them into water and carbon dioxide. For this reason, photocatalytic reactions are mainly used for purification, water purification, and sterilization to effectively remove pollutants.

The silver nanoparticles 60 are dispersed and arranged in the photocatalyst layer 50.

Silver nanomaterials have bactericidal and antibacterial properties. Metallic silver (Ag) combines with oxygen molecules (O₂) and sterilizes because it releases active oxygen with a strong oxidizing effect. When silver meets moisture, it easily becomes silver ions (Ag+). When silver ions meet bacteria, bacteria It has an antibacterial action because it inhibits the enzymes that control the respiration of the body.

On the other hand, Ni, Ti, Zn, NiO, TiO2, and ZnO forming the transition metal adhesive layer 40 and the photocatalytic layer 50 have excellent electromagnetic wave shielding performance, and the fiber filter 10 improves the electromagnetic wave shielding performance.

Hereinafter, the manufacturing process of the fiber filter 10 will be described with reference to FIG. 2.

First, the filter body 20 is formed (step 110).

The filter body 20 is formed in the form of a fabric sheet having perforations by randomly stacking fine fibers of any one of a polymer, metal, or carbon material by means of electrospinning, melt-blown, or the like. Here, it is preferable that the thickness of the fiber yarn 30 is 10 um or less in diameter, and the size of the through hole is 1 um or less.

When a polymer is applied as a material of fiber yarn forming the filter body 20, polyethersulfone (PES), polypropylene (PP), polyethylene terephthalate (PET), polycarbonate (PC), polyaniline (PANI), polyethylene oxide Any one of (PEO), polylactic acid (PLA), polyvinylpyrrolidone (PVP), polycaprolactone (PCL), polystyrene (PS), and polyvinylidene fluoride (PVDF) may be applied. In addition, as the material of the fiber yarn forming the filter body 20, any one of copper, nickel, iron, aluminum, and titanium may be applied when a metal is applied, and when a carbon material is applied, graphite or carbon nanotubes Any one of (CNT), graphene, and graphene oxide can be applied.

When necessary, the filter body 20 may be formed in a structure in which two or more fibrous layers having different materials or different fiber thicknesses are attached in plural. In this case, one or more layers may be used as a support layer.

Next, a pretreatment process including cleaning, etching, activating, and forming a metal seed layer on the surface of the fiber yarn 30 of the filter body 20 is performed (step 120).

When coating a metal on the surface of a non-metallic material such as a polymer, it is preferable to undergo a pretreatment process because the coating is not uniform or is not uniform due to low affinity with the metal. The pretreatment process includes surface cleaning, surface fine etching, surface sensitization, surface activation, and metal seed layer formation.

In the pretreatment process, first, after wet cleaning to remove contaminants such as oil on the surface of the filter body 20, the surface is finely etched with an acid-based etchant to form a bonding functional group and an anchor effect. ), and immersed in tin ionic liquid to attach tin ions to the surface to make the surface sensitive, and immersed in palladium (Pd) ionic liquid to reduce the attached tin ions to palladium ions to activate the surface, By immersing in a reducing agent solution, a palladium metal seed layer is formed to make it a state capable of adsorbing plated metal ions.

Thereafter, the transition metal is electroless/electrolytically plated on the fiber yarn of the filter body 20 that has undergone the pretreatment process to form the transition metal adhesive layer 40 (step 130).

Transition metals suitable for electroless plating to be applied to the present invention are nickel (Ni), copper (Cu), and the like, and each is applied by implementing an electrolyte containing a transition metal precursor. When nickel is applied as a transition metal, nickel sulfate and nickel chloride are applied, and when copper is applied, copper sulfate and the like are applied.

In addition, in the case of forming a secondary transition metal with titanium on the electroless nickel or copper plating layer primarily formed on the surface of the fiber thread 30, titanium electroplating may be performed using an electrolyte containing titanyl sulfate. In order to exclude biochemical hazards and realize efficient photocatalytic performance, the most preferable method is to apply a transition metal adhesive layer double-deposited with nickel/titanium as described above.

Lastly, as the process of oxidizing the transition metal adhesive layer 50 implemented through electroless metal plating, it is necessary to implement silver nanoparticles with antibacterial properties at the same time, so anodizing based on a material containing a silver (Ag) precursor, An antimicrobial photocatalyst layer 50 based on a transition metal oxide in which silver nanoparticles 60 are dispersed on the surface by almost oxidizing the surface of the transition metal adhesive layer through chemical conversion and chemical oxidation. Form (step 140).

Meanwhile, in consideration of the photocatalytic performance of each transition metal in the manufacturing process of the fiber filter 10, nickel or copper may be applied as a material of the transition metal adhesive layer 40 that is adhered to the surface of the fiber yarn 30, and the photocatalyst layer ( 50) may be formed of titanium or nickel. Therefore, the nickel plated on the surface of the fiber yarn 30 can be directly subjected to an oxidation process, and in the case of copper, it is preferable to perform the oxidation process after additionally plating titanium or nickel. In this case, it is preferable to perform an oxidation process after electrolytic plating of titanium for a nickel or copper layer.

The photocatalyst layer 50 has light resistance to high energy density of a photocatalytic excitation light source such as visible light or ultraviolet light, but if it is thin, light may reach the lower fiber yarn 30 and cause a photodecomposition phenomenon. In order to block transmission, the thickness of the photocatalyst layer 50 including the transition metal adhesive layer 40 is preferably 500 nm or more, and ½ or less of the thickness of the fiber yarn 30 is suitable to secure the flexibility of the fiber yarn 930).

The fiber filter 10 functions as a photocatalyst in which the photocatalyst layer 50 made of _{TiO 2} or NiO in which the silver nanoparticles 60 having antibacterial action are dispersed on the surface is excited by visible and ultraviolet rays, and The transition metal adhesive layer 40 made of or copper serves to bond and support the fiber yarn 30 so that the photocatalyst layer 50 can be formed, and a fabric-shaped filter composed by randomly placing the fine fiber yarns 30 The main body 20 provides a function of filtering more than the minimum size of a hole formed by the fiber threads 30 of the filter main body 20 among objects to be removed contained in a fluid such as air or water.

A manufacturing example of a method of manufacturing a fiber filter having such an antimicrobial photocatalytic material surface will be described below.

[Manufacture of fabric-type filter body based on polyethersulfone (PES)]

-Transfer the electrospinning solution prepared by dissolving 3g polyethersulfone in 100mL N-methylpyrrolidone solvent into a syringe with a metal tip, connect the positive electrode, ground the aluminum substrate 20cm away from the syringe, and both ends at room temperature. A filter body 20 composed of a fiber yarn having a thickness of 1 μm or less was prepared by spinning in the air for 20 minutes at a spinning solution discharge rate of 0.5 mL/hr while applying a voltage of 10 kV to the filter body 20. Pictures for are shown in FIGS. 2 and 3.

[Manufacture of transition metal contact layer]

-The manufactured PES-based filter body 20 is cleaned with ultrasonic waves for 10 minutes in a cleaning solution in which Alconox®, an anion cleaning agent (a cleaning agent in which an alkali salt or a synthetic compound of an ammonium salt is an anion), is dissolved in ultrapure water at a concentration of 10 g/L. After washing in ultrapure water _{for 10 minutes, ultrasonic treatment in an aqueous solution for surface etching consisting of potassium permanganate (KMnO 4} ) 10mM (mole) and 85% phosphoric acid 7.5M (mole) for 10 minutes, and ultrasonication in ultrapure water for 10 minutes After washing, immersion in a surface-sensitive aqueous solution consisting of 36% hydrochloric acid 80ml/L(liter) and tin chloride 20g/L for 20 minutes, and a surface-activating aqueous solution consisting of 36% hydrochloric acid 200ml/L and palladium chloride 0.25g/L. After performing a pretreatment process of forming a metal seed layer by immersing for 30 minutes and immersing in a reducing sodium hypophosphite 25g/L aqueous solution for 1 minute, nickel sulfate 25g/L, sodium hypophosphite 25g/L, citric acid 25g/L The configured nickel electroless plating aqueous solution was heated to 70°C, adjusted to pH 5.0 with 1M (mole) NaOH aqueous solution, and then immersed in the filter body 20 for 3 minutes to electrolessly plate Ni and washed with ultrapure water. Titanium sulfate 25g/L, ammonium citrate 50g/L, ammonium sulfate 50g/L, L-asparic acid 10g/L, ethylenediamine tetraacetic acid (EDTA) 10g/L, boric acid 30g/L, thiourea After heating the titanium electrolytic plating aqueous solution consisting of 10g/L to 90℃, adjusting the pH to 4.5 with ammonia water, connecting the carbon rod anode and the nickel plated fiber filter to the cathode, and then filter the current density at a current density of 30A/dm2 for 1 hour. The body 20 was electroplated with titanium and washed with ultrapure water. Finally, a Ni/Ti transition metal adhesive layer 40 having a thickness of 0.5 μm and 2 μm was prepared on the surface of the PES fiber yarn 30, respectively.

_{[Preparation of silver nanoparticle dispersion type TiO 2} photocatalyst layer through oxidation of Ti metal layer and reduction of silver ions]

-Ti connected to the anode to an ethylene glycol electrolyte consisting of 0.3M (mole) of ammonium fluoride, 0.1M (mole) of phosphoric acid, 20ml/L of ultrapure water, and 0.1mM (mole) of silver nitrate for the anodic oxidation of the Ti transition metal adhesive layer 40 After immersing the fiber filter with the surface of the transition metal adhesive layer 40 and the platinum electrode connected to the cathode, anodizing titanium for 30 minutes at a DC voltage of 30V and a current density of 0.75A/dm2, washing with ultrapure water, and washing the filter body (20) was vacuum-dried at 90° C. for 3 hours. A photocatalyst layer 50 _{made of a silver (Ag) doped TiO 2} nanotube array having a thickness of 2 μm and a hole diameter of 80 nm was formed on the surface of the fiber yarn 30 of the filter body 20.

[Realization of dispersion of silver nanoparticles on the surface of TiO2 photocatalyst layer]

-On the other hand, the photocatalyst layer 50 is formed by anodizing the Ti transition metal adhesive layer 40 with an electrolyte composed of 0.3M (mole) of ammonium fluoride, 0.1M (mole) of phosphoric acid, and 20ml/L of ultrapure water, The silver nanoparticles 60 _{may be formed to be dispersed in the TiO 2} photocatalyst layer 50 through a subsequent process. In this case, a 0.1mM aqueous solution of silver nitrate was heated to 60℃, then 100ml/L of 10mM trisodium citrate was added dropwise, the temperature was raised to 90℃, and then Ti was added to the aqueous solution adjusted to pH 10.5 with 0.1M (mole) sodium hydroxide aqueous solution. _{The filter body 20 having the TiO 2} surface immediately after the completion of the anodic oxidation was immersed for 1 minute, washed and washed with ultrapure water, and the silver nanoparticles were attached to the TiO2 photocatalyst layer 50, followed by vacuum drying at 90°C for 3 hours. .

Hereinafter, a fluid purification apparatus to which such a fiber filter is applied will be described with reference to FIG. 5.

Referring to FIG. 5, the fluid purification apparatus 200 according to the present invention includes a tube body 210, a light emitting module 220, a fiber filter 10, and a fan 240.

The tube body 210 is formed to have a flow path through which it is communicated in the front-rear direction.

The tube body 210 may be formed in a square tube shape.

The light emitting module 220 is mounted along the longitudinal direction on the inner surfaces of the upper and lower portions of the tube body 210, that is, the ceiling and the floor, and emits ultraviolet rays or visible rays into the flow path. The light emitting module 220 is applied as an excitation light source that excites the photocatalyst layer 50, and preferably emits light in a wavelength band of 250 to 500 nm.

As an example, the light emitting module 220 is arranged as a UV-C LED emitting light of a wavelength of 257 nm above the tube body 210, and a UV-A LED emitting light of a wavelength of 365 nm below the tube body 210 is arranged. Can be built.

The fiber filter 10 is installed so as to extend from the bottom surface of the tube body 210 to the ceiling inclined with respect to the central axis of the flow path along the longitudinal direction of the tube body 210. A plurality of fiber filters 10 are disposed to be spaced apart from each other along the extending direction of the flow path. It is preferable to apply the inclination angle of the fiber filter 10 so that the interposition angle (a) formed between the bottom surface is 25 to 65 degrees. Here, when the angle (a) exceeds 65 degrees, the distance between the fiber filters 10 is very narrow, so that the photocatalyst cannot be efficiently irradiated. have. In addition, if the angle (a) is less than 25 degrees, there is a disadvantage that the number of possible arrangements of the fiber filters 10 is reduced so that the filtering function cannot be properly performed.

On the other hand, it is preferable to arrange the adjacent fiber filters to partially overlap each other when projecting from the upper part of the separation interval of the fabric-shaped fiber filter 10. In addition, when a fiber filter 10 having different pore sizes is applied, a relatively large pore size is applied to the inlet side of the pipe body 210 into which the fluid flows, thereby increasing the antibacterial and filtering function efficiency, and the pipe body 210 It is preferable to increase the antibacterial and photocatalytic function efficiency by reducing the pore size at the outlet side.

The fan 240 is applied as an example of a flow rate generation module that generates a blowing force through which a fluid can be transferred, and is installed at the rear of the tube body 210 to generate a suction force through which the fluid is transferred.

It goes without saying that a fan may be installed at the front end of the enclosure 210 to generate a blowing force from the front to the rear of the enclosure 210 unlike the illustrated example.

In contrast, when a liquid is applied as a fluid, a pump can be applied as a flow rate generating module.

According to the fiber filter having the surface of the antimicrobial photocatalyst material described above, the manufacturing method thereof, and the fluid purification device using the same, the antibacterial property of the fiber filter is improved while improving the adhesion between the fiber yarn and the photocatalyst layer, and the light resistance and electromagnetic wave shielding performance of the photocatalyst layer It also provides the advantage of improving.

10: fiber filter 20: filter body
30: fiber yarn 40: transition metal adhesive layer
50: photocatalyst layer 60: silver nanoparticles

Claims (8)

A filter body in the form of a fabric sheet by accumulating fiber yarns having through holes;
A transition metal adhesive layer adhered to the surface of the fiber yarn with a transition metal;
A photocatalyst layer formed by oxidizing the transition metal adhesive layer on the transition metal adhesive layer;
A fiber filter having an antimicrobial photocatalytic material surface comprising; silver nanoparticles dispersed and disposed in the photocatalytic layer. The method of claim 1, wherein the transition metal adhesive layer includes a first transition metal adhesive layer formed of Ni on the fiber yarn, and a second transition metal adhesive layer formed of Ti on the first transition metal adhesive layer,
The photocatalyst layer is a fiber filter having an antimicrobial photocatalytic material surface, characterized in that formed by oxidizing the second transition metal adhesive layer. end. Forming a transition metal adhesive layer with a transition metal on the surface of the fiber yarns of the filter body integrated with the fiber yarns having through holes;
I. Oxidizing the surface of the transition metal adhesive layer to form a photocatalyst layer in which silver nanoparticles are dispersed. The method of claim 3, comprising a pretreatment step of pretreating before forming the transition metal adhesive layer on the filter body in the step of adding,
The pretreatment process includes the steps of wet cleaning the filter body and then finely etching the surface with an acid-based etchant;
Immersing the filter body in a tin ionic liquid to attach tin ions to the surface to sensitively treat the surface;
Immersing the filter body in a palladium ionic liquid to reduce the attached tin ions to palladium ions to activate the surface;
Forming a palladium metal seed layer by immersing the filter body in a reducing agent solution; method for manufacturing a fiber filter having an antimicrobial photocatalytic material surface comprising a. The method of claim 3, wherein the temporary step
A-1. The filter body formed of fiber yarn made of polyethersulfone by electrospinning was ultrasonicated in a cleaning solution in which an anion detergent was dissolved in ultrapure water at a concentration of 10 g/L, and after washing in ultrapure water, potassium permanganate (KMnO ₄ ) 10mM ( mole), 85% phosphoric acid 7.5M (mole). After sonication in ultrapure water, a surface-sensitive aqueous solution consisting of 36% hydrochloric acid 80ml/L(liter) and tin chloride 20g/L A pretreatment step of immersing and then immersing in a surface-activated aqueous solution consisting of 36% hydrochloric acid 200ml/L and palladium chloride 0.25g/L, and then immersing in a reducing sodium hypophosphite 25g/L aqueous solution to form a metal seed layer;
A-2. A nickel electroless plating aqueous solution consisting of 25 g/L of nickel sulfate, 25 g/L of sodium hypophosphite, and 25 g/L of citric acid is heated to 70° C. and adjusted to pH 5.0 with 1M (mole) NaOH aqueous solution, and then the electroless plating aqueous solution Forming a first transition metal adhesive layer by electroless plating the filter body that has undergone the pretreatment step;
A-3. After washing the filter body on which the first transition metal adhesive layer is formed with ultrapure water, 25 g/L of titanyl sulfate, 50 g/L of ammonium citrate, 50 g/L of ammonium sulfate, 10 g/L of L-asparic acid, The titanium electrolytic plating aqueous solution consisting of 10 g/L of ethylenediamine tetraacetic acid (EDTA), 30 g/L of boric acid, and 10 g/L of thiourea is heated to 90°C and then adjusted to pH 4.5 with aqueous ammonia, and the aqueous solution for electrolytic plating of titanium. And forming a second transition metal adhesive layer made of titanium (Ti) on the first transition metal adhesive layer through a titanium electroplating process. The method of claim 5, wherein step B is
A photocatalyst layer is formed by anodizing the second transition metal adhesive layer with an ethylene glycol electrolyte consisting of 0.3M (mole) of ammonium fluoride, 0.1M (mole) of phosphoric acid, 20ml/L of ultrapure water, and 0.1mM (mole) of silver nitrate. Method for producing a fiber filter having an antimicrobial photocatalytic material surface, characterized in that. The method of claim 5, wherein step B is
B-1. Forming a photocatalyst layer by anodizing the second transition metal adhesive layer with an electrolyte consisting of 0.3M (mole) of ammonium fluoride, 0.1M (mole) of phosphoric acid, and 20 ml/L of ultrapure water;
B-2. A 0.1mM (mole) aqueous solution of silver nitrate was heated to 60℃, then 10mM (mole) trisodium citrate 100ml/L was added, the temperature was raised to 90℃, and the pH was adjusted to 10.5 with 0.1M (mole) sodium hydroxide aqueous solution. In the method of manufacturing a fiber filter having an antimicrobial photocatalytic material surface, comprising: immersing the filter body, washing with ultrapure water, and dispersing and bonding silver nanoparticles to the photocatalyst layer. A tube body having a flow path communicated in the front-rear direction;
A light emitting module mounted on the upper and lower portions of the tube and emitting ultraviolet or visible light toward the flow path;
A plurality of fiber filters installed to extend from the bottom surface of the tube to the ceiling inclined with respect to the central axis of the flow path along the longitudinal direction of the tube, and disposed to be spaced apart from each other along the extending direction of the flow path;
And a flow rate generation module generating a blowing force through which fluid can be transferred into the tube body,
The fiber filter
A filter body in the form of a fabric sheet by accumulating fiber yarns having through holes;
A transition metal adhesive layer adhered to the surface of the fiber yarn with a transition metal;
A photocatalyst layer formed by oxidizing the transition metal adhesive layer on the transition metal adhesive layer;
And a silver nanoparticle dispersed in the photocatalyst layer.

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