Portable sterilizing water bottle using triboelectrification

Abstract

The present disclosure provides a portable sterilizing water bottle comprising: a body part having an inner space in which a liquid can be accommodated; a contact part disposed on the outer circumferential surface of the body part and made of a conductive material; an electric wire having one end electrically coupled to the contact part; and an electrode part positioned inside the body part so that a part or all of the electrode part can be immersed in the liquid, the electrode part being electrically coupled to the other end of the electric wire and having a nanopattern portion formed of a carbon compound material on the surface thereof, wherein the nanopattern portion is formed to protrude in a direction away from the surface of the electrode part, and has a cross-sectional area that decreases in the direction away from the surface.

Description

Portable sterilizing water bottle using triboelectric charging

[0001] The embodiments of the present disclosure relate to a portable sterilizing water bottle, and more specifically, to a portable sterilizing water bottle capable of sterilizing a liquid contained therein by utilizing static electricity generated during walking to generate triboelectric charge.

[0002] Drinking water is a major vector for the transmission of waterborne pathogens, and even after purification, microorganisms can regrow during storage and drainage processes, potentially leading to re-contamination. Therefore, direct sterilization using portable water bottles should be considered for the safe storage of drinking water.

[0003] Existing water treatment methods include chlorine sterilization, UV-based sterilization, and membrane filtering, but applying these to portable water bottles requires additional chemicals for chlorine purification and a stable and continuous energy supply, and there are limitations in that sterilization performance deteriorates with long-term use.

[0004] Furthermore, conventional sterilization methods that generate antimicrobial active oxygen through electricity require high energy consumption, and the active oxygen can oxidize chloride ions present in drinking water, potentially generating harmful chlorination byproducts. Photocatalysts have limitations, such as reduced sterilization performance during long-term use, as organic matter or suspended particles in the water cover the surface, lowering reactivity. Additionally, prolonged use generates reactive oxygen species (ROS), such as OH radicals and hydrogen peroxide, which react with certain substances to form unexpected byproducts. Moreover, the presence of ions (such as chlorides and bromides) leads to the formation of chlorination and bromination byproducts during the photocatalytic reaction.

[0005] As an alternative to address the problems of the aforementioned sterilization method, physical sterilization using electroporation, which inactivates microorganisms by damaging their external structures, can be considered. This sterilization method can perform sterilization with low energy consumption by using electrodes equipped with one-dimensional nanostructures that form a localized electric field. However, nanostructures formed from metal materials may release metal ions harmful to drinking water, and non-metallic carbon-based nanostructures are difficult to manufacture due to weak binding forces to the electrodes.

[0006] The embodiments of the present disclosure aim to solve various problems, including those existing in the aforementioned conventional portable water bottles, by providing a portable sterilizing water bottle capable of sterilizing a liquid contained therein using triboelectric charging by utilizing static electricity generated during walking. However, this objective is exemplary and does not limit the scope of the present disclosure.

[0007] According to one aspect of the present disclosure, a portable sterilizing water bottle is provided, comprising: a body portion having a space capable of containing a liquid; a contact portion disposed on the outer surface of the body portion and formed of a conductive material; a wire having one end electrically coupled to the contact portion; and an electrode portion located inside the body portion, having a portion or all of which is immersed in the liquid and electrically coupled to the other end of the wire, and having a nanopattern portion of a carbon compound material formed on its surface, wherein the nanopattern portion is formed to protrude in a direction away from the surface of the electrode portion, and is formed such that its cross-sectional area decreases in the direction away from the surface.

[0008] According to the present embodiment, the contact portion is in close contact with a part of the user's body and can directly receive electric charge induced in the body by static electricity during walking, and the wire can transfer the electric charge received by the contact portion to the electrode portion.

[0009] According to the present embodiment, the electrode portion may be manufactured according to a method comprising: (a) a step of forming the electrode portion on one surface of an intaglio mold in which a recess corresponding to a protrusion of the nanopattern portion is formed; and (b) a step of separating the electrode portion from the intaglio mold.

[0010] According to the present embodiment, prior to step (a), a step of creating the intaglio mold on a relief mold having irregularities corresponding to the protrusions of the nanopattern portion formed on one surface (a0) may be performed.

[0011] According to the present embodiment, the intaglio mold can be created by spin coating on the relief mold.

[0012] According to the present embodiment, step (a) may include: (a1) a step of sputtering a thin film on one surface where a recess is formed of the intaglio mold; and (a2) a step of depositing the electrode portion on the intaglio mold by electropolymerization.

[0013] According to the present embodiment, the embossed mold is formed of nickel material, the intaglio mold is formed of PMMA (poly(methylmethacrylate)) material, and the thin film can be formed of ITO (Indium Tin Oxide) material.

[0014] According to the present embodiment, one side of the embossed mold can be anisotropically wet-etched.

[0015] According to the present embodiment, the embossed mold can be manufactured by applying O2 plasma to a glass substrate having PDMS (dimethylpolysiloxane) laminated on one side.

[0016] According to the present embodiment, the intaglio mold is manufactured by sequentially performing O2 plasma etching and KOH anisotropic etching on a Si wafer having a PMMA coating layer and a shadow mask stacked thereon, and the shadow mask is stacked on the PMMA coating layer, but may be stacked on the remaining portion excluding the portion where the indentation is to be placed.

[0017] According to the present embodiment, the intaglio mold can be manufactured by applying O2 plasma to a glass substrate having PDMS (dimethylpolysiloxane) laminated on one side.

[0018] According to the present embodiment, the nanopattern portion may be formed from at least one of polypyrole, PEDOT:PSS (Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)), polyaniline, and P3HT (poly(3-hexylthiophene)).

[0019] According to the present embodiment, the contact portion may be formed of an aluminum material.

[0020] According to the present embodiment, the nanopattern portion may be provided with a plurality of pyramidal-type tips that extend outward from the surface of the electrode portion.

[0021] Other aspects, features, and advantages other than those described above will become clear from the specific details, claims, and drawings for implementing the invention below.

[0022] In addition, these general and specific aspects may be implemented using a system, method, computer program, or any combination of a system, method, or computer program.

[0023] According to an exemplary embodiment of the present disclosure made as described above, a portable sterilizing water bottle can be realized that sterilizes a liquid contained therein by utilizing triboelectric charging through static electricity generated during walking. Of course, the scope of the present disclosure is not limited by this effect.

[0024] FIG. 1 is a conceptual diagram illustrating the process of a portable sterilizing water bottle according to an exemplary embodiment of the present disclosure sterilizing a liquid contained therein by utilizing static electricity generated during walking.

[0025] FIG. 2 is a schematic diagram illustrating a portable sterilizing water bottle according to an exemplary embodiment of the present disclosure.

[0026] FIGS. 3a to 3c are images of the surface of an electrode portion provided in a portable sterilizing water bottle according to an exemplary embodiment of the present disclosure.

[0027] FIG. 4 is a conceptual diagram illustrating a method for manufacturing an electrode portion according to one embodiment of the present disclosure.

[0028] FIG. 5 is a conceptual diagram illustrating a method for manufacturing an electrode portion according to another embodiment of the present disclosure.

[0029] FIGS. 6a and 6b are conceptual diagrams illustrating a method for manufacturing an electrode portion according to another embodiment of the present disclosure.

[0030] FIGS. 7a and 7b are conceptual diagrams illustrating a method for manufacturing an electrode portion according to another embodiment of the present disclosure.

[0031] FIGS. 8a, FIGS. 8b, and FIGS. 9 are drawings for explaining a surface charge formed on an electrode portion according to an exemplary embodiment of the present disclosure.

[0032] FIG. 10 is a graph illustrating a comparison of sterilization efficiency between a portable sterilized water bottle according to an exemplary embodiment of the present disclosure and a conventional portable water bottle.

[0033] FIGS. 11a to 11c and FIG. 12 are drawings for explaining the sterilization effect of a portable sterilizing water bottle according to an exemplary embodiment of the present disclosure.

[0034] The present disclosure is capable of various modifications and may have various embodiments; specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present disclosure and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the drawings. However, the present disclosure is not limited to the embodiments disclosed below and may be implemented in various forms.

[0035] The terms used in this disclosure are for describing the embodiments and are not intended to limit this disclosure.

[0036] In this disclosure, the singular form may include the plural form unless specifically stated otherwise in the text. Additionally, as used in this disclosure, "comprises" and / or "comprising" do not exclude the presence or addition of one or more other components in addition to the mentioned components.

[0037] Although terms such as "first," "second," etc., are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of this disclosure.

[0038] The word "exemplary" is used in this disclosure to mean "used as an example or illustration." Any embodiment described as "exemplary" in this disclosure must not be interpreted as being preferred or having an advantage over other embodiments.

[0039] In the following embodiments, terms such as "include" or "have" mean that the features or components described in the specification are present, and do not preclude the possibility that one or more other features or components may be added.

[0040] In the following embodiments, when a part such as a layer or component is described as being on or above another part, it includes not only cases where it is directly on top of another part, but also cases where other components, etc. are interposed in between.

[0041] In the drawings, the size of components may be exaggerated or reduced for convenience of explanation. For example, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and therefore the present disclosure is not necessarily limited to what is illustrated. Additionally, descriptions of some components may be omitted to clarify the features of the embodiments.

[0042] Where an embodiment can be implemented differently, a specific sequence of operations may be performed differently from the order described. For example, two steps described consecutively may be performed substantially simultaneously or proceed in the reverse order of the description.

[0043] In the following embodiments, when layers, components, etc. are described as being connected, this includes cases where the layers, components, etc. are directly connected, or / or cases where other layers, components, etc. are interposed between the layers, components, etc., so that they are indirectly connected. For example, when layers, components, etc. are described as being electrically connected in this specification, this indicates cases where the layers, components, etc. are directly electrically connected, and / or cases where other layers, components, etc. are interposed between them so that they are indirectly electrically connected.

[0044] The advantages and features of the present disclosure and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure is complete and to fully inform those skilled in the art of the scope of the present disclosure, and the present disclosure is defined only by the scope of the claims.

[0045] Unless otherwise defined, all terms used in this disclosure (including technical and scientific terms) may be used in a meaning commonly understood by those skilled in the art to which this disclosure pertains. Additionally, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise.

[0046] In the following, embodiments of the present disclosure will be described in detail with reference to the attached drawings. When describing with reference to the drawings, identical or corresponding components are given the same reference numerals, and redundant descriptions thereof will be omitted.

[0047] Hereinafter, a portable sterilizing water bottle (10) according to an embodiment of the present disclosure will be described with reference to FIGS. 1 to 3c. First, each component of the portable sterilizing water bottle (10) will be described with reference to FIGS. 1 to 2.

[0048] FIGS. 1 and 2 are schematic diagrams illustrating a portable sterilizing water bottle according to an exemplary embodiment of the present disclosure. The portable sterilizing water bottle (10) according to the present embodiment can sterilize a liquid contained therein by utilizing triboelectric charging by utilizing static electricity generated during a user's walking process. Specifically, physical sterilization can be achieved by inactivating microorganisms such as bacteria and viruses present in the liquid through electroporation. In the present disclosure, "sterilization" means the act of killing germs such as pathogenic microorganisms, and the present disclosure is not limited by such terminology. For example, in the present disclosure, "sterilization" may be interpreted as meaning "sterilization," "disinfection," etc.

[0049] The sterilization process is as follows. First, when a user walks while holding a portable sterilization bottle (10) in their hand, the shoes worn by the user come into contact with the ground, generating triboelectricity. At this time, an electric charge opposite to the charge accumulated in the shoes is induced on the user's body surface by electrostatic induction. The electric charge induced on the user's body surface moves from the user to the portable sterilization bottle (10) through a low-resistance path and is finally accumulated in the electrode portion (400) of the portable sterilization bottle (10) (see FIG. 1). The electric charge accumulated in the electrode portion (400) damages the external structure of microorganisms present in the liquid inside the portable sterilization bottle (10) and inactivates the microorganisms. A detailed explanation of this will be provided later, along with a description of the electrode portion (400).

[0050] A portable sterilized water bottle (10) is formed to store and transport liquid by having a space inside that can accommodate liquid. The liquid includes drinking water and beverages, and is not limited to a specific liquid.

[0051] A portable sterilizing water bottle (10) according to the present embodiment includes a body part (100), a contact part (200), a wire (300), and an electrode part (400).

[0052]

[0053] The body portion (100) is a member that the user directly grips with their hand and provides a space for storing liquid. In the illustrated embodiment, the body portion (100) includes a lid portion (110) and a container portion (120).

[0054] The lid portion (110) and the container portion (120) each serve as a cover and a liquid receiving space for the body portion (100). The lid portion (110) is coupled to the opening of the container portion (120), but can be detachably coupled to the container portion (120).

[0055] The lid portion (110) may be formed in a shape corresponding to the opening of the container portion (120). For example, an uneven surface may be formed on one side of the lid portion (110) that can be engaged with the teeth formed in the opening. In one embodiment, a through hole may be formed in a part of the lid portion (110) into which a wire (300) can be inserted.

[0056] The container portion (120) is provided with a space inside which liquid can be contained. Additionally, an opening is formed on one side of the container portion (120) so that liquid can be injected or discharged. In the illustrated embodiment, the container portion (120) is formed in a cylindrical shape. However, the shape of the container portion (120) is not limited to the illustrated embodiment and can be formed in various structures capable of storing and transporting liquid.

[0057] A contact portion (200) is disposed on the outer surface of the container portion (120).

[0058] The contact portion (200) is in close contact with a part of the user's body and is a part that directly receives the electric charge induced in the body by static electricity during walking.

[0059] The contact portion (200) is positioned on the outer surface of the body portion (100), specifically the container portion (120). Accordingly, when a user grasps the body portion (100) with their hand, a part of the hand may come into close contact with the contact portion (200).

[0060] The contact portion (200) is formed of a conductive material. For example, the contact portion (200) may be formed of an aluminum material. A wire (300) is connected to one side of the contact portion (200), and the electric charge received by the contact portion (200) from the user's body can be transferred to the wire (300).

[0061] One end of the wire (300) is connected to the body part (100), and the other end is electrically connected to the contact part (200) to transfer the charge received from the contact part (200) to the electrode part (400) described later.

[0062] One end of the wire (300) is electrically connected to the contact portion (200). Additionally, a portion of the wire (300) is connected to the body portion (100). In the illustrated embodiment, the other end of the wire (300), opposite to the end connected to the contact portion (200), is connected to the lid portion (110). In one embodiment, the wire (300) may be connected through one side of the lid portion (110).

[0063] The outer surface of the wire (300) is covered with an insulating material. In one embodiment, the wire (300) may be made of copper wire.

[0064] The other end opposite to the one end connected to the contact portion (200) of the wire (300) is electrically connected to the electrode portion (400). The electrode portion (400) receives and accumulates electric charge induced in the user's body through the wire (300).

[0065] The electrode portion (400) is located inside the body portion (100), specifically the container portion (120). At this time, part or all of the electrode portion (400) may be immersed in the liquid contained inside the container portion (120). That is, the surface of part or all of the electrode portion (400) may come into contact with the liquid. At this time, the charge accumulated in the electrode portion (400) may induce a local electric field in the region near the electrode portion (400), and as a result, the external structure of microorganisms present in the region near the electrode portion (400) may be damaged, and sterilization by electroporation may be performed. A detailed explanation thereof will be provided later.

[0066] A nanopattern portion of a carbon compound material is formed on the surface of the electrode portion (400). Hereinafter, the nanopattern portion provided on the electrode portion (400) will be described with reference to FIGS. 3a to 3c.

[0067] FIGS. 3a to 3c are images of the surface of an electrode portion provided in a portable sterilizing water bottle (10) according to an exemplary embodiment of the present disclosure. Specifically, FIGS. 3a to 3c each show a Scanning Electron Microscope (SEM) image of the electrode portion (400), an Atomic Force Microscope (AFM) image of the surface of the electrode portion (400), and an AFM image of the surface of the nanopattern portion.

[0068] The nanopattern portion is formed on the surface of the electrode portion (400) and is formed to protrude in a direction away from the surface of the electrode portion (400). Accordingly, the surface area of ​​the electrode portion (400) including the nanopattern portion can be maximized, and the contact area with the liquid can also be increased, thereby further improving the sterilization efficiency.

[0069] Additionally, the nanopattern portion is formed such that its cross-sectional area decreases in a direction away from the surface of the electrode portion (400). In one embodiment, the nanopattern portion may be provided with a plurality of pyramidal-type tips that extend in a direction away from the surface of the electrode portion (400). In the embodiment illustrated in FIGS. 3a to 3c, the nanopattern portion is provided with a plurality of pyramidal-type tips having uniform height and diameter on the surface of the electrode portion (400), and each of the plurality of tips is arranged perpendicularly to the surface of the electrode portion (400).

[0070] The charge accumulated in the electrode portion (400) has a tendency to move toward the region with the smallest radius on the surface of the electrode portion (400). Accordingly, the accumulated charge moves in a direction away from the surface of the nanopattern portion. That is, charge accumulates at the end of the nanopattern portion. As a result, a strong local electric field can be induced in the region near the end of the nanopattern portion, and when microorganisms approach the end, the external structure of the microorganisms can be damaged by electroporation. Microorganisms with damaged external structures are deactivated, and consequently, sterilization of the liquid can be performed.

[0071] Through this sterilization method, the liquid contained in the portable sterilization water bottle (10) can be sterilized with low energy without a separate external power source. In addition, since the nanopattern part is not formed of a metal material, metal ions harmful to the human body are not released during the sterilization process.

[0072] In one embodiment, the nanopattern portion may be formed from a polypyrrole (PPy) material. Since the nanopattern portion formed from the polypyrrole material has strong covalent bonds, it enables more stable water treatment. In another embodiment, the nanopattern portion may be formed from a PEDOT:PSS (Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)) material. In yet another embodiment, the nanopattern portion may be formed from a polyaniline material. In yet another embodiment, the nanopattern portion may be formed from a P3HT (poly(3-hexylthiophene)) material.

[0073] Hereinafter, a method for manufacturing the electrode portion (400) described above will be explained with reference to FIGS. 4 to 7b.

[0074] The electrode portion (400) according to an embodiment of the present disclosure may be formed on an intaglio mold. Specifically, it may be formed on one surface where a recess corresponding to a protrusion of the nanopattern portion of the intaglio mold is formed. Additionally, the electrode portion (400) is formed on one surface of the intaglio mold and then separated from the intaglio mold.

[0075] In one embodiment, an intaglio mold may be formed on a relief mold. Specifically, an intaglio mold may be formed on one side of a relief mold where irregularities corresponding to the protrusions of the nanopattern portion are formed. In the above embodiment, the intaglio mold formed on the relief mold is subsequently separated from the relief mold and functions as a mold for the electrode portion (400).

[0076] FIGS. 4 to 7b each disclose a method for manufacturing an electrode portion (400) according to different embodiments. First, a method for manufacturing an electrode portion (400) according to the embodiment shown in FIG. 4 will be described.

[0077] FIG. 4 is a conceptual diagram illustrating a method for manufacturing an electrode portion according to one embodiment of the present disclosure. In the embodiment illustrated in FIG. 4, the positive mold of the electrode portion (400) is formed from a nickel material. A poly(methylmethacrylate) PMMA is spin-coated onto the positive mold to create a negative mold of the electrode portion (400). Subsequently, the negative mold can be separated and obtained from the positive mold.

[0078] As described above, a depression corresponding to a protrusion of the nanopattern is formed on one side of the intaglio mold. After the intaglio mold is separated from the positive mold, a thin film formed of ITO (Indium Tin Oxide) material is sputtered on the said side of the intaglio mold.

[0079] Subsequently, a polypyrrole is deposited by electropolymerization on the surface on which the thin film was sputtered, and an electrode portion (400) is formed and then separated. At this time, due to the difference in surface energy between the polypyrrole and ITO, the electrode portion (400) can be easily separated from the ITO.

[0080] The electrode portion (400) formed from polypyrrole material has a robust structure due to strong covalent bonding and is chemically stable, so the release of harmful substances can be prevented. In addition, the nanopattern portion formed from polypyrrole material is approximately 10 5 Since the local electric field of the electrode part (400) exhibiting high conductivity of S / cm can be further strengthened, and the sterilization performance can be further improved.

[0081] Next, a method for manufacturing the electrode portion (400) according to the embodiment shown in FIG. 5 will be described.

[0082] FIG. 5 is a conceptual diagram illustrating a method for manufacturing an electrode portion according to another embodiment of the present disclosure. In the embodiment illustrated in FIG. 5, the negative mold of the electrode portion (400) is manufactured by etching a Si wafer (411). First, a PMMA coating layer (412) is formed on one side of the Si wafer (411). Subsequently, a shadow mask (413) is laminated on the PMMA coating layer (412), wherein the shadow mask (413) is laminated on the remaining portion excluding the portion where the recessed portion corresponding to the protrusion of the nanopattern portion is to be placed.

[0083] When O2 plasma etching is performed on a Si wafer (411) having a PMMA coating layer (412) and a shadow mask (413) stacked thereon, only a portion of the PMMA coating layer (412) where the recessed portion is to be placed is etched. Subsequently, when KOH anisotropic etching is performed on the Si wafer (411) on which O2 plasma etching was performed, the portion where the PMMA coating layer (412) is not placed is etched, and a recessed portion corresponding to the protrusion of the nanopattern is formed on one side of the Si wafer (411).

[0084] Next, a method for manufacturing an electrode portion (400) according to the embodiment illustrated in FIGS. 6a and 6b will be described.

[0085] FIGS. 6a and 6b are conceptual diagrams illustrating a method for manufacturing an electrode portion according to another embodiment of the present disclosure. In the embodiment illustrated in FIGS. 6a and 6b, a positive mold or a negative mold of the electrode portion (400) is manufactured by anisotropic wet etching on one side. This enables patterning of the positive mold or negative mold without a mask, and allows for obtaining an electrode portion (400) equipped with a horn-shaped nanopattern portion having a pointed end.

[0086] In one embodiment, the embossed mold (421) of the electrode portion (400) may be manufactured by anisotropic wet etching on one side (see FIG. 6a).

[0087] In another embodiment, the intaglio mold (422) of the electrode portion (400) may be manufactured by anisotropic wet etching on one side thereof. In the above embodiment, a release agent (423) may be applied to the etched surface of the intaglio mold (422) (see FIG. 6b).

[0088] Next, a method for manufacturing an electrode portion (400) according to the embodiment illustrated in FIG. 7a and FIG. 7b will be described.

[0089] FIGS. 7a and 7b are conceptual diagrams illustrating a method for manufacturing an electrode portion according to another embodiment of the present disclosure. In the embodiment illustrated in FIG. 7a, an irregular irregularity is formed on one surface of the positive mold or negative mold of the electrode portion (400) by O2 plasma. First, a PDMS (dimethylpolysiloxane) layer (432) is laminated on one surface of a glass substrate (431). Subsequently, after the PDMS layer (432) is extended along the surface of the glass substrate (431), O2 plasma is applied. The PDMS layer (432) to which O2 plasma is applied has an irregular irregularity formed on its surface. FIG. 7b illustrates the surface of the PDMS layer (432) to which O2 plasma is applied.

[0090] Hereinafter, the sterilization effect of the electrode portion (400) according to an embodiment of the present disclosure will be explained with reference to FIGS. 8a to 12.

[0091] As described above, the electrode portion (400) according to the embodiment of the present disclosure has a nanopattern portion of a carbon compound material formed on its surface, and the nanopattern portion is formed to protrude in a direction away from the surface of the electrode portion (400), and is formed such that its cross-sectional area decreases in the direction away from the surface.

[0092] The electrode portion (400) receives static charges induced in the body during the user's walking process, and the received static charges accumulate at the end of the nanopattern portion due to the property of moving toward the area with the smallest radius. Accordingly, an enhanced local electric field can be formed in the adjacent area of ​​the end of the nanopattern portion.

[0093] FIGS. 8a, FIGS. 8b, and FIGS. 9 are drawings for explaining a surface charge formed on an electrode portion according to an exemplary embodiment of the present disclosure.

[0094] Figure 8a shows a KPFM (Kelvin Probe Force Microscopy) image capturing the surface charge of the nanopattern. Referring to Figure 8a, it can be confirmed that the surface charge is actually concentrated at the end of the nanopattern.

[0095] In addition, Fig. 8b illustrates a simulation of the electron density and electric field distribution at the end of the nanopattern. Referring to Fig. 8b, a strong local electric field (> 10) near the end of the nanopattern 7 Vm -1 It can be confirmed that ) is formed.

[0096] When activated microorganisms approach the nanopattern, pores are created in the microorganisms by electroporation, and the external structure may be damaged. In other words, microorganisms that approach the nanopattern may be inactivated (see Fig. 9). As a result, microorganisms adjacent to the nanopattern may be sterilized.

[0097] FIG. 10 is a graph illustrating a comparison of sterilization efficiency between a portable sterilizing water bottle (10) according to an exemplary embodiment of the present disclosure and a conventional portable water bottle. Specifically, FIG. 10 is a graph comparing the sterilization efficiency of an electrode part (400) equipped with a nanopattern part (PPy nanorod) formed of a polypyrrole material and a polypyrrole film (PPy film) electrode.

[0098] E = ??log(C / C0) (C: microbial concentration after sterilization, C0: microbial concentration before sterilization)

[0099] When the sterilization efficiency (E) is defined as above, under the same conditions, the polypyrrole film electrode showed a negligible sterilization effect of less than 0.2 log for E. coli, B. subtilis, and MS2 label, whereas the electrode part (400) equipped with a nanopattern part formed of polypyrrole material showed a sterilization effect of more than 6.0 log for E. coli, B. subtilis, and MS2 label, and it can be confirmed that complete sterilization was achieved.

[0100] Hereinafter, the effect of inactivating microorganisms by a portable sterilizing water bottle (10) according to an embodiment of the present disclosure will be described with reference to FIGS. 11a to 11c and FIG. 12.

[0101] FIGS. 11a to 11c and FIG. 12 are drawings for explaining the sterilization effect of a portable sterilized water bottle (10) according to an exemplary embodiment of the present disclosure.

[0102] FIG. 11a shows an SEM image of the state of E. coli before and after inactivation. FIG. 11b also shows a TEM (Transmission Electron Microscopy) image of the state of MS2 phage before and after inactivation. Referring to FIG. 11a and FIG. 11b, it can be seen that small pores of 100 nm or less were formed on the membrane surface during the inactivation process of E. coli or MS2 phage, respectively. However, since no clear collapse of the membrane shape was observed for either E. coli or MS2 phage, it can be understood that the electroporation of the electrode portion (400) according to the embodiment of the present disclosure is the main mechanism for inactivation.

[0103] In addition, Fig. 11c illustrates a simulation of the state of microorganisms before and after inactivation by molecular dynamics. Referring to Fig. 11c, it can be seen that during the process of inactivating microorganisms, through-holes, i.e., pores formed by electroporation, are formed in the cell membrane composed of the phospholipid bilayer of the microorganisms.

[0104] FIG. 12 illustrates the results of a sterilization efficiency experiment of a portable sterilizing water bottle (10) according to an embodiment of the present disclosure for 500 mL of drinking water containing E. coli. In this experiment, it can be seen that more than 99.9999% of microorganisms are inactivated after about 10 minutes when the user walks at a fixed speed of 1 Hz. In addition, it can be seen that when the user walks at a fixed speed of 2 Hz, it takes about 7 minutes for more than 99.9999% of microorganisms to be inactivated. Through this, it can be understood that the sterilization performance also increases as the user's walking speed increases.

[0105] Up until now, only portable sterilized water bottles (10) have been described, but the present disclosure is not limited thereto. For example, a method for manufacturing such portable sterilized water bottles (10) is also considered to be within the scope of the present disclosure.

[0106] Although the present disclosure has been described with reference to the embodiments illustrated in the drawings, this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom, and that all or part of each embodiment may be selectively combined. Accordingly, the true scope of technical protection of the present disclosure should be determined by the technical spirit of the appended claims.

[0107] This patent is the product of research conducted with support from the Korea Institute of Industrial Technology Planning and Evaluation and the Ministry of Trade, Industry and Energy's Next-Generation Intelligent Semiconductor Technology Development R&D Project (Project No.: 1415187321, Project No.: 20025736, Research Project Title: Development of MICS SoC and platform for invivo implantable electroceutical device).

[0108] This patent is the result of research conducted with the support of the Korea Institute of Technology Information Promotion for SMEs and the Ministry of SMEs and Startups' Startup Growth Technology Development Project (Project No.: 2420003291, Project No.: RS202400445805, Research Project Name: Development of Miniaturized / High-Output Energy Solutions for Battery-Free Electronic Medicine).

[0109] This patent is the result of research conducted with the support of the Ministry of SMEs and Startups and the Korea Institute of Startup & Entrepreneurship Promotion's Super-Gap Startup Incubation Program (DIPS 1000+) (Project No.: 20266504, Research Project Title: Ultrasonic Energy Solution for Remotely Controllable Battery-Free Electronic Medicine).

Claims

1. A body portion having a space capable of accommodating liquid inside; A contact portion disposed on the outer surface of the above-mentioned body portion and formed of a conductive material; A wire having one end connected to the above contact part so as to be electrically conductive; and It includes an electrode portion located inside the body portion, wherein part or all thereof is immersed in the liquid, is electrically coupled to the other end of the wire, and has a nanopattern portion of a carbon compound material formed on its surface. The above nanopattern section is, Protruding in a direction away from the surface of the electrode portion, wherein the cross-sectional area is reduced in the direction away from the surface. Portable sterilized water bottle.

2. In Paragraph 1, The above contact portion is, It is in close contact with a part of the user's body and can directly receive electric charges induced in the body by static electricity during walking, and The above wire is, The above contact part transfers the received charge to the above electrode part, Portable sterilized water bottle.

3. In Paragraph 1, The above electrode part is, (a) a step of forming the electrode portion on one surface of an intaglio mold having a recessed portion corresponding to a protrusion of the nanopattern portion; and (b) manufactured according to a method comprising the step of separating the electrode portion from the intaglio mold, Portable sterilized water bottle.

4. In Paragraph 3, Prior to the above (a) step, (a0) A step of forming the intaglio mold on a relief mold having irregularities formed on one surface that correspond to the protrusions of the nanopattern portion, is performed. Portable sterilized water bottle.

5. In Paragraph 4, The above-mentioned intaglio mold is, The product created by spin coating on the above embossed mold, Portable sterilized water bottle.

6. In Paragraph 5, The above step (a) is, (a1) a step of sputtering a thin film on one surface of the above-mentioned intaglio mold where a recess is formed; and (a2) A step comprising depositing the electrode portion on the above-mentioned intaglio mold by electropolymerization to form the electrode portion, Portable sterilized water bottle.

7. In Paragraph 6, The above-mentioned embossed mold is formed of nickel material, the above-mentioned intaglio mold is formed of PMMA (poly(methylmethacrylate)) material, and the above-mentioned thin film is formed of ITO (Indium Tin Oxide) material, Portable sterilized water bottle.

8. In Paragraph 4, The above embossed mold is, One side is anisotropically wet-etched, Portable sterilized water bottle.

9. In Paragraph 4, The above embossed mold is, A glass substrate having PDMS (dimethylpolysiloxane) laminated on one side, manufactured by applying O2 plasma, Portable sterilized water bottle.

10. In Paragraph 3, The above-mentioned intaglio mold is, A Si wafer having a PMMA coating layer and a shadow mask stacked thereon is fabricated by sequentially performing O2 plasma etching and KOH anisotropic etching, and The above shadow mask is, Laminated on the above PMMA coating layer, wherein the laminated portion is the portion excluding the portion where the indentation is to be placed, Portable sterilized water bottle.

11. In Paragraph 3, The above-mentioned intaglio mold is, A glass substrate having PDMS (dimethylpolysiloxane) laminated on one side, manufactured by applying O2 plasma, Portable sterilized water bottle.

12. In Paragraph 1, The above nanopattern portion is formed from at least one material selected from polypyrole, PEDOT:PSS (Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)), polyaniline, and P3HT (poly(3-hexylthiophene)). Portable sterilized water bottle.

13. In Paragraph 1, The above contact portion is formed of aluminum material, Portable sterilized water bottle.

14. In Paragraph 1, The above nanopattern section is, A plurality of pyramidal-type tips are provided, extending in a direction away from the surface of the electrode portion. Portable sterilized water bottle.

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