KR102245712B1 - Nanoparticle coating device - Google Patents

Abstract

A nanoparticle coating device is disclosed. The nanoparticle coating device may include a dielectric material; A first electrode disposed on the dielectric; A second electrode disposed opposite to the first electrode with the dielectric between the first electrode and spaced apart from the dielectric; A power supply device for applying a voltage to the first electrode and the second electrode; And a plasma generating unit disposed between the dielectric and the second electrode as a region in which plasma is generated when a voltage is applied to the first electrode and the second electrode, wherein a part or all of the second electrode is the plasma It is characterized in that it is exposed to the generator.

Description

Nano particle coating device {NANOPARTICLE COATING DEVICE}

The present invention relates to a nanoparticle coating apparatus, and more particularly, to a nanoparticle coating apparatus for easily obtaining nanoparticles and coating them on a base material or a substrate.

Nanopowder is an essential material used throughout the industry. Gas-phase and wet synthesis methods are used to produce these materials. In the case of wet synthesis, various toxic substances such as precursors, dispersants, reducing agents, and solvents are used, and additional wastewater treatment and a separate coating process are required.

Existing vapor phase synthesis technologies include Inert Gas Condensation (IGC), Chemical Vapor Condensation (CVC), and Metal Salt Spray-Drying.

Among them, the inert gas condensation (IGC) process is capable of producing ultra-fine nanometal powders with high purity, but requires a large amount of energy and has a very low production rate, so industrial applications are limited, and the chemical vapor condensation (CVC) process is inert. Compared to the gas condensation (IGC) process, it is a slightly improved process in terms of energy and production speed, but the cost of the raw material precursor is very expensive, which is disadvantageous in terms of economy. In addition, the metal salt spray drying process is economical because it uses inexpensive salts as raw materials, but contamination and agglomeration of powder in the drying step cannot be avoided, and toxic by-products are generated, which is disadvantageous in terms of environment.

As a technology capable of solving the problems of the conventional nanopowder manufacturing method and producing a uniform nanopowder more economically, there is a nanopowder manufacturing technology using electromagnetic wave plasma. As an example, Korean Patent Application Publication No. 2006-62582 discloses a method of manufacturing titanium dioxide nanopowder using electromagnetic wave plasma.

However, this patent has a problem in that the process is complicated because it has to go through several steps to manufacture the nanopowder, and the structure of the device for using the electromagnetic wave plasma is complicated because it uses the electromagnetic wave plasma.

There are various problems in manufacturing nanopowder, such as expensive materials, materials that cause environmental problems, and complex processes. Accordingly, in the present invention, a technology capable of immediately coating a nanopowder on a substrate through a single atmospheric pressure plasma treatment without a separate material was developed. This technology does not require separate processes such as material and wastewater treatment.

Therefore, the problem to be solved by the present invention is that it is possible to easily obtain nanoparticles by using atmospheric pressure plasma, and without expensive equipment such as precursors or vacuum systems, wet processes and toxic substances, additional processes such as wastewater, and special materials. It is to provide a nanoparticle coating apparatus capable of obtaining nanoparticles and allowing the obtained nanoparticles to be immediately coated on a base material or a substrate.

Nanoparticle coating apparatus according to an embodiment of the present invention is a dielectric; A first electrode disposed on the dielectric; A second electrode disposed opposite to the first electrode with the dielectric between the first electrode and spaced apart from the dielectric; A power supply device for applying a voltage to the first electrode and the second electrode; And a plasma generating unit disposed between the dielectric and the second electrode as a region in which plasma is generated when a voltage is applied to the first electrode and the second electrode, wherein a part or all of the second electrode is the plasma It is characterized in that it is exposed to the generator.

In one embodiment, the dielectric includes an electrode accommodation space with open upper and lower portions, and part or all of the second electrode is inserted into the electrode accommodation space and spaced apart from the inner surface of the electrode accommodation space, and the first electrode Is provided to surround the periphery of the electrode accommodation space, the plasma generation part is inside the electrode accommodation space, and a part or all of the second electrode may be exposed to the plasma generation part within the electrode accommodation space.

In one embodiment, the dielectric may have a hollow column shape having the electrode accommodation space therein, and the first electrode may wrap the outer surface of the column shape.

In one embodiment, the first electrode may be provided to spirally surround the outer surface of the columnar shape of the dielectric.

In one embodiment, the first electrode may be provided to surround the column shape of the dielectric material at a position close to one end of the electrode accommodation space.

In one embodiment, the dielectric is provided to surround the first electrode, the second electrode is disposed to be spaced apart from the dielectric by a predetermined distance in a horizontal direction, and the plasma generating unit is spaced apart from the second electrode and the dielectric. It can be located within a distance.

In one embodiment, the dielectric is provided to surround the first electrode, the second electrode is disposed to be spaced apart from the dielectric by a predetermined distance in a vertical direction, and the plasma generating unit is spaced apart from the second electrode and the dielectric. It can be located within a distance.

In one embodiment, the power supply device may be provided to enable adjustment of a voltage level.

In one embodiment, the second electrode may be any one selected from a group of metal materials including silver, palladium, zinc, and indium tin alloy.

In one embodiment, the plasma may be atmospheric pressure plasma.

By using the nanoparticle coating apparatus according to the present invention, nanoparticles can be obtained simply by generating plasma in an atmospheric pressure environment and exposing the surface of the electrode to the plasma, and the obtained nanoparticles can be immediately coated on a base material or a substrate. Therefore, there is an advantage of simplifying the process of obtaining nanoparticles and coating the nanoparticles onto a base material or a substrate.

In addition, since atmospheric pressure plasma is generated and used, there is no need to use harmful gas for plasma generation, and thus, there is an advantage that safe and eco-friendly use is possible without the generation of toxic substances.

In addition, since the voltage applied to the electrode is provided to be adjustable to increase or decrease the voltage applied to the electrode, there is an advantage in that the amount of nanoparticles obtained and the amount of coating of the nanoparticles can be adjusted according to the amount of voltage applied.

1 is a cross-sectional view showing the configuration of a nanoparticle coating device according to an embodiment of the present invention.
2 is a perspective view showing the appearance of FIG. 1.
3 are images showing a result of confirming the surface of an electrode exposed to plasma at each voltage level by means of an SEM.
4A are images showing a result of confirming the surface of a substrate coated with silver nanoparticles by SEM at each voltage level.
4B is a graph showing an increase rate of the composition of silver coated on a substrate at each voltage level.
5 is a diagram illustrating a process of coating silver nanoparticles on fibers.
6A is an image showing a result of confirming the surface of a fiber coated with silver nanoparticles by SEM over time.
6B is a graph showing an increase rate of the composition and density of silver nanoparticles of a fiber coated with silver nanoparticles over time.
7 shows the antimicrobial test results of the fiber coated with silver nanoparticles according to Example 2.
8A shows an image of a fiber state according to the results of an Anti-fungal test of a fiber coated with silver nanoparticles according to Example 2. FIG.
8B shows a graph comparing the degree of deodorization of the fiber coated with silver nanoparticles and the degree of deodorization of the fiber not coated with the nanoparticles according to Example 2. FIG.
9A are images showing a result of confirming the surface of a substrate coated with palladium nanoparticles at each voltage level by SEM.
9B is a graph showing the result of confirming the detection of palladium oxide by XPS.
10 is a view showing the configuration of a nanoparticle coating device according to another embodiment of the present invention.
11 is a view showing the configuration of a nanoparticle coating device according to another embodiment of the present invention.

Hereinafter, a nanoparticle coating apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the present invention, various modifications may be made and various forms may be applied, and specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific form disclosed, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals have been used for similar elements. In the accompanying drawings, the dimensions of the structures are shown to be enlarged than the actual size for clarity of the present invention.

Terms such as first and second may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance the possibility of the presence or addition.

Unless otherwise defined, all terms used herein including technical or scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in the present application. Does not.

The nanoparticle coating apparatus of the present invention includes a dielectric material; A first electrode disposed on the dielectric; A second electrode disposed opposite to the first electrode with the dielectric between the first electrode and spaced apart from the dielectric; A power supply device for applying a voltage to the first electrode and the second electrode; And a plasma generating unit disposed between the dielectric and the second electrode as a region in which plasma is generated when a voltage is applied to the first electrode and the second electrode, wherein a part or all of the second electrode is the plasma It is exposed to the generating part.

Hereinafter, the nanoparticle coating apparatus of the present invention will be described with reference to various examples.

1 is a cross-sectional view showing the configuration of a nanoparticle coating apparatus according to an embodiment of the present invention, and FIG. 2 is a perspective view showing the appearance of FIG. 1.

1 and 2, a nanoparticle coating device according to an embodiment of the present invention includes a dielectric 110, a first electrode 120, a second electrode 130, and a power supply 140. .

The dielectric 110 is provided in a columnar shape, and includes an electrode accommodation space 111 located in the center of the columnar shape and parallel to the longitudinal direction of the columnar shape. For example, the dielectric 110 may have a cylindrical shape. Here, the inside of the electrode accommodation space 111 is a plasma generating unit in which plasma is generated.

The first electrode 120 is provided to surround the outer surface of the dielectric 110 in the shape of a column. For example, the first electrode 120 may be provided to spirally surround the outer surface of the dielectric 110 in the shape of a column. In this case, the first electrode 120 may be provided to surround the column shape of the dielectric 110 at a position close to one end of the electrode accommodation space 111, for example, a lower end of a cylindrical shape.

The second electrode 130 is provided in a columnar shape, but is provided to have a cross-sectional area smaller than the cross-sectional area of the electrode receiving space 111, and is inserted into the electrode receiving space 111. At this time, the surface of the second electrode 130 is spaced apart from the inner surface of the electrode accommodation space 111. For example, the second electrode 130 may have a cylindrical shape. There is no particular limitation on the length of the second electrode 130, and may have, for example, a length corresponding to the height of the electrode accommodation space 111.

The power supply device 140 applies a voltage to the first electrode 120 and the second electrode 130 so that plasma is generated between the inner surface of the electrode receiving space 111 and the surface of the second electrode 130. For example, the first electrode 120 may be grounded and a high voltage may be applied to the second electrode 130. In addition, the power supply device 140 is provided to enable adjustment of the magnitude of the voltage.

The second electrode 130 is used as a material for generating nanoparticles. For example, the second electrode 130 may be made of any one material selected from a group of metal materials including silver (Ag), palladium (Pd), zinc (Zn), and indium tin alloy (InSn).

Hereinafter, a process of obtaining nanoparticles through the nanoparticle coating apparatus according to an embodiment of the present invention and coating the nanoparticles on the base material or the substrate will be described.

In the nanoparticle coating apparatus according to an embodiment of the present invention, one end, for example, a lower end of the dielectric 110 is disposed above the base material or the electrode.

In this state, first, a voltage is applied to the first electrode 120 and the second electrode 130 by the power supply 140 in an atmospheric pressure environment. In this case, a high voltage may be applied to the second electrode 130.

When a voltage is applied to the first electrode 120 and the second electrode 130, the gas in the electrode receiving space 111, that is, air is used as a gas for plasma generation to mediate the gas present in the electrode receiving space 111. Atmospheric pressure plasma is generated in the furnace electrode accommodation space 111.

The plasma generated in the electrode receiving space 111 surrounds the surface of the second electrode 130 located in the electrode receiving space 111, whereby the surface of the second electrode 130 is exposed to plasma and melted or sputtered ( sputter). As a result, nanoparticles of the material of the second electrode 130 are obtained. The nanoparticles are freely dropped from the electrode receiving space 111 and coated on the base material or the substrate.

Embodiment 1

Using the second electrode 130 made of silver material, the surface of the second electrode 130 was exposed to plasma to generate silver nanoparticles, and then the silver nanoparticles were coated on the surface of the substrate.

When the silver nanoparticles were coated on the substrate, the voltage was gradually increased to the surface of the substrate, and the surface of the electrode and the density of the nanoparticle coated with the silver nanoparticles were confirmed according to the voltage level. SEM (Scanning Electron Microscopy) was used to confirm the surface of the electrode and the surface of the substrate.

3 are images showing a result of confirming the surface of an electrode exposed to plasma at each voltage level by means of an SEM.

As shown in FIG. 3, it was confirmed that the surface of the electrode exposed to the plasma became rougher as the higher voltage was applied. It was confirmed that the higher the voltage was applied, the greater the amount of nanoparticles obtained.

4A is an image showing a result of confirming the surface of a substrate coated with silver nanoparticles at each voltage level by SEM, and FIG. 4B is a graph showing an increase rate of the composition of silver coated on the substrate at each voltage level.

As shown in FIG. 4A, it was confirmed that the silver nanoparticle density increased as a high voltage was applied, and as shown in FIG. 4B, it was confirmed that the silver composition of the surface of the substrate coated with the silver nanoparticles increased as the high voltage was applied. there was.

Embodiment 2

Using the second electrode 130 made of silver material, the surface of the second electrode 130 was exposed to plasma to generate silver nanoparticles, and then the silver nanoparticles were coated on the fibers of the substrate.

5 is a diagram illustrating a process of coating silver nanoparticles on fibers.

As shown in FIG. 5, in the coating process of the fiber, silver nanoparticles were coated on the fiber for a certain period of time while rotating the fiber in a roll manner, and the surface of the fiber according to the coating time was confirmed by SEM, and XPS (X-ray Photoelectron Spectrosoopy) was used. The composition and density of silver nanoparticles were confirmed.

Figure 6a is an image showing the result of confirming the surface of the fiber coated with silver nanoparticles by SEM over time, and Figure 6b is an increase rate of the composition and density of silver nanoparticles of the fiber coated with silver nanoparticles over time It is a graph showing.

As shown in FIGS. 6A and 6B, it was confirmed that the composition and density of the silver nanoparticles increased as time passed.

On the other hand, in order to confirm the antimicrobial degree of the fiber coated with silver nanoparticles according to Example 2, an antimicrobial degree test was conducted according to the KS K 0693:2016 Korean standards standard.

7 shows the antimicrobial test results of the fiber coated with silver nanoparticles according to Example 2.

As shown in FIG. 7, it was confirmed that the silver nanoparticle-coated fiber had no growth of Staphylococcus aureus and pneumococcus compared to the fiber not coated with the silver nanoparticle.

On the other hand, in order to confirm the mold growth of the fiber coated with silver nanoparticles according to Example 2, anti-fungal test was conducted according to the international standard of the American Association of Textile Chemists and Colorists (AATCC30), and the silver according to Example 2 In order to check the deodorization rate of the nanoparticle-coated fiber, the deodorization rate of acetic acid was measured by the KSI 2218 method using a detector tube type gas measuring instruments.

Figure 8a shows a fiber state image according to the anti-fungal test result of the fiber coated with silver nanoparticles according to Example 2, Figure 8b is a deodorization degree and nanoparticles of the fiber coated with silver nanoparticles according to Example 2 Shows a graph comparing the degree of deodorization of uncoated fibers.

As shown in Figure 8a, it was confirmed that the silver nanoparticle-coated fiber did not grow mold, and as shown in FIG. 8b, it was confirmed that the deodorization degree of the silver nanoparticle-coated fiber was higher than that of the non-silver nanoparticle-coated fiber. Could.

Example 3

Using the second electrode 130 made of palladium material, the surface of the second electrode 130 was exposed to plasma to generate palladium nanoparticles, and then coated on the surface of the substrate for 1 minute, and the coating was performed while increasing the voltage level. I did.

According to Example 3, the surface of the substrate coated with palladium nanoparticles was confirmed by SEM, and it was confirmed whether palladium oxide was detected by XPS.

As shown in FIG. 9A, as the voltage was increased, it was confirmed that a larger amount of palladium nanoparticles were coated on the surface of the substrate, and it was confirmed that palladium oxide was detected on the surface of the substrate.

By using the nanoparticle coating apparatus according to an embodiment of the present invention, nanoparticles can be obtained only by generating plasma in an atmospheric pressure environment and exposing the surface of the electrode to the plasma, and the obtained nanoparticles are immediately used as a base material or Since it can be coated on a substrate, there is an advantage that the acquisition of nanoparticles and the coating process of the nanoparticles onto the base material or the substrate are simplified.

In addition, since atmospheric pressure plasma is generated and used, there is no need to use harmful gas for plasma generation, and thus, there is an advantage that safe and eco-friendly use is possible without the generation of toxic substances.

In addition, since the voltage applied to the electrode is provided to be adjustable to increase or decrease the voltage applied to the electrode, there is an advantage in that the amount of nanoparticles obtained and the amount of coating of the nanoparticles can be adjusted according to the amount of voltage applied.

10 is a view showing the configuration of a nanoparticle coating device according to another embodiment of the present invention.

Referring to FIG. 10, a nanoparticle coating apparatus according to another embodiment of the present invention includes a first electrode 210, a second electrode 220, a dielectric 230, and a power supply device 240.

The first electrode 210 may be provided in a rectangular block shape.

The second electrode 220 has the same or similar shape as the first electrode 210 and is disposed to be spaced apart from the first electrode 210 by a predetermined distance in the horizontal direction. For example, the second electrode 220 may be provided in a rectangular block shape.

The dielectric 230 is provided to surround the first electrode 210 or the second electrode 220. For example, the dielectric 230 may be provided to surround the entire first electrode 210.

In the arrangement between the electrodes, the plasma generator generating plasma is located within a spaced distance between the second electrode 220 and the dielectric 230.

The power supply device 240 applies a voltage to the first electrode 210 and the second electrode 220 so that plasma is generated within the spaced distance between the first electrode 210 and the second electrode 220. For example, the first electrode 210 may be grounded, and the second electrode 220 may be applied with a high voltage.

In the nanoparticle coating apparatus according to another embodiment of the present invention, when the power supply device 240 applies a voltage to the first electrode 210 and the second electrode 220, the first electrode 210 and the second electrode ( Plasma is generated through the gas injected within the spaced distance of 220, that is, air. At this time, the second electrode 220 covered with the dielectric 230 is protected from the plasma, and the second electrode 220 faces the second electrode 220. 1 The surface of the electrode 210 is exposed to plasma to melt and sputter to obtain nanoparticles. The nanoparticles fall toward the substrate 10 and are coated.

The action and effect of the nanoparticle coating device according to another embodiment of the present invention are the same as the action and effect of the nanoparticle coating device according to an embodiment of the present invention.

11 is a view showing the configuration of a nanoparticle coating device according to another embodiment of the present invention.

Referring to FIG. 11, a nanoparticle coating apparatus according to another embodiment of the present invention includes a first electrode 310, a second electrode 320, a dielectric 330, and a power supply device 340, and the The dielectric 330 is provided to surround one of the first electrode 310 and the second electrode 320. For example, the dielectric 330 may be provided to surround the first electrode 310.

In the arrangement between the electrodes, the plasma generator generating plasma is located within a spaced distance between the second electrode 320 and the dielectric 330.

In the nanoparticle coating apparatus according to another embodiment of the present invention, the first electrode 310 and the second electrode 320 are spaced apart a predetermined distance in the vertical direction, and a substrate or a base material is disposed on the electrode covered with the dielectric 330 Except that it is the same as the nanoparticle coating apparatus according to another embodiment of the present invention.

The description of the presented embodiments is provided to enable any person skilled in the art to use or practice the present invention. Various modifications to these embodiments will be apparent to those of ordinary skill in the art, and general principles defined herein can be applied to other embodiments without departing from the scope of the present invention. Thus, the present invention is not to be limited to the embodiments presented herein, but is to be construed in the widest scope consistent with the principles and novel features presented herein.

Claims (10)

A hollow, columnar dielectric including an electrode receiving space with open upper and lower portions;
A second electrode partially or entirely inserted parallel to the longitudinal direction of the electrode accommodation space and spaced apart from the inner surface of the electrode accommodation space;
A first electrode enclosing the electrode accommodation space on the dielectric material and overlapping the second electrode and the electrode accommodation space by surrounding a portion into which the second electrode is inserted;
A power supply device configured to apply a voltage to the first electrode and the second electrode, and to adjust the voltage level; And
A region in which plasma is generated when a voltage is applied to the first electrode and the second electrode, and includes a plasma generating unit inside the electrode accommodation space,
The first electrode spirally surrounds the outer surface of the columnar shape of the dielectric,
The second electrode is composed of any one material selected from the group of metal materials including silver, palladium, zinc, and indium tin alloy, and is used as a material for generating nanoparticles,
The dielectric, the first electrode, and the second electrode are disposed such that the lower end of the dielectric is positioned above the base material or the substrate,
When a voltage is applied to the first electrode and the second electrode, plasma is generated in the electrode accommodation space, and the plasma surrounds the surface of the second electrode,
The second electrode is melted or sputtered by being exposed to plasma surrounding the surface,
The melted or sputtered nanoparticles of the second electrode are freely dropped and coated on the base material or the substrate,
Nano particle coating device. delete delete delete delete delete delete delete delete The method of claim 1,
The plasma is characterized in that the atmospheric pressure plasma,
Nanoparticle coating device.

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