A disinfection device, a disinfection assembly and a manufacturing method thereof

Abstract

The application discloses a disinfection device, a disinfection assembly and a manufacturing method thereof, and belongs to the technical field of outdoor portable disinfection devices. The disinfection device comprises an electrode assembly and an insulating film. The electrode assembly comprises a substrate and a plurality of spaced conductive electrodes. The conductive electrodes are located on one side of the substrate. The insulating film is attached to one side of the substrate and is located on the same side of the substrate as the conductive electrodes. The end of the conductive electrode away from the substrate penetrates the insulating film and protrudes beyond the surface of the insulating film. The length of the conductive electrode is set to 1-100 microns, and the average diameter is set to 20-200 nanometers. When a liquid with conductivity flows through the surface of the insulating film, frictional charges are generated due to friction. After the charges accumulate on the conductive electrodes, the conductive electrodes can amplify the electric field to 10 4 ~10 6 V / m. Under this electric field intensity, microbial inactivation is achieved, and in-situ self-powered disinfection is realized without the need to provide an external voltage and an external power management system.

Description

Technical Field

[0001] This invention relates to the field of outdoor portable disinfection devices, and more specifically, to a disinfection device, disinfection components, and a method for manufacturing the same. Background Technology

[0002] When working in the field, engaging in outdoor activities, or conducting emergency rescue operations, it is often necessary to obtain water locally. However, water obtained in the wild is generally of poor quality and does not meet drinking water standards. To ensure drinking water safety, people often need to carry sufficient drinking water, which increases the burden of travel.

[0003] Current disinfection devices typically employ either chemical or physical disinfection methods. Chemical disinfection relies on chemical agents (such as disinfectant solutions and ozone) and generating devices (such as nozzles and ozone generators), resulting in complex overall structures, high manufacturing costs, low disinfection efficiency, and the generation of disinfection byproducts. Physical disinfection (such as ultraviolet irradiation) can directly kill various bacteria, viruses, parasites, algae, and other pathogens. However, ultraviolet lamp covers are prone to scaling and require regular replacement, and their operation requires an external power source, making them unsuitable for outdoor environments.

[0004] Electroporation disinfection based on nanowire-enhanced local electric fields is an emerging physical disinfection method. It primarily utilizes one-dimensional nanowires with high aspect ratios (length to diameter) to create a localized high-voltage electric field (>10⁻⁶) at the tip. 6 Electroporation (V / m) disrupts the external structure of microorganisms and inactivates them. Electroporation disinfection has been proven effective against bacteria, viruses, and protozoa. Patent application CN113461120A discloses an alternating electric field-enhanced nanowire electrode electroporation disinfection method, which exhibits high efficiency and stable disinfection effects. However, to generate a strong electric field, electroporation disinfection still requires an external power source to provide the driving voltage.

[0005] Therefore, the application of existing disinfection methods in outdoor settings needs further improvement. Summary of the Invention

[0006] This invention provides a disinfection device, disinfection components, and a method for manufacturing the same, which solves the problems of complex structure, generation of disinfection byproducts, and reliance on external power supply in existing disinfection methods, and can be applied more portablely and safely in outdoor settings.

[0007] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0008] A disinfection assembly includes an electrode assembly and an insulating membrane.

[0009] The electrode assembly includes a substrate and a plurality of spaced conductive electrodes, the conductive electrodes being located on one side of the substrate;

[0010] The insulating film is attached to one side of the substrate and is located on the same side of the substrate as the conductive electrode. The end of the conductive electrode away from the substrate passes through the insulating film and extends beyond the surface of the insulating film.

[0011] The conductive electrode has a length of 1-100 μm and an average diameter of 20-200 nm. When a conductive liquid flows across the surface of the insulating film, an electric field is generated due to friction. When current flows through the conductive electrode, the conductive electrode can amplify the electric field intensity to 10. 4 ~10 6 V / m.

[0012] As a further improvement, the conductive electrodes are distributed regularly or irregularly on one side of the substrate.

[0013] As a further improvement, the conductive electrode is one of the following metals: copper, silver, zinc, or nickel.

[0014] As a further improvement, the insulating film is one of polytetrafluoroethylene, polydimethylsiloxane, or polydopamine.

[0015] The present invention also provides a method for manufacturing the aforementioned disinfection component, comprising the following steps:

[0016] S10. Electrodeposition is performed using the template and metal substrate as working electrodes.

[0017] S20. Dissolve the template to obtain an electrode assembly, wherein the conductive electrode is columnar.

[0018] S30. After immersing the electrode assembly in step S20 in etching solution, place it in air for etching to make the conductive electrode needle-shaped.

[0019] S40. A suspension of the insulating film raw material is spin-coated onto one side of the substrate in the electrode assembly, and then cured to form the sterilization assembly.

[0020] As a further improvement, the template is an alumina template with a thickness of 10–60 μm;

[0021] The alumina template has several through holes with a center-to-center spacing of 100-500 nm, and the voltage for electrodeposition is -1.0-1.0 V.

[0022] As a further improvement, in step S20, a phosphoric acid solution is used to dissolve the template; the phosphoric acid solution has a mass fraction of 5-50 wt%, and the dissolution time is 1-5 h.

[0023] As a further improvement, in step S30, when etching in air, the electrode assembly is inverted so that the end of the conductive electrode away from the substrate faces downward.

[0024] The solute in the etching solution is composed of (NH4)2S2O8 and NaOH, and the etching time is 10-60 min.

[0025] As a further improvement, in step S40, the mass fraction of the insulating film raw material in the suspension is 5-50 wt%, the spin coating amount is 100-2000 μL, the spin coating speed is 30-1000 rpm, and the temperature is 15-80℃; the curing temperature is set to 40-120℃, and the curing time is set to 0.5-12 h.

[0026] The present invention also provides a disinfection device, including the disinfection components; the disinfection components are arranged to form a container having a receiving chamber, the length of the container not exceeding 1000 mm; the conductive electrode and the insulating film are located inside the receiving chamber; the openings at both ends of the container are respectively connected to an upper insulating seat and a lower insulating seat.

[0027] Compared with the prior art, the technical solution provided by this invention has the following advantages:

[0028] (1) The disinfection component of the present invention has a conductive electrode with a length of 1-100 μm and an average diameter of 20-200 nm. When a conductive liquid flows across the surface of the insulating film, an electric field intensity is generated due to friction. After the current flows through the conductive electrode, the conductive electrode can amplify the electric field intensity to 10. 4 ~10 6 V / m, microbial inactivation and disinfection are performed under this electric field strength. This disinfection method does not require the addition of chemical agents, does not generate disinfection byproducts, has broad-spectrum effectiveness against all microorganisms, and achieves in-situ self-powered disinfection without the need for external voltage and external power management system.

[0029] (2) The disinfection component of the present invention includes an electrode assembly and an insulating film. The electrode assembly includes a substrate and a plurality of spaced conductive electrodes, and has a simple structure.

[0030] (3) The disinfection device of the present invention includes the disinfection components; the disinfection components are arranged to form a container with a receiving chamber, and the openings at both ends of the container are respectively connected to an upper insulating seat and a lower insulating seat. The structure is simple and easy to carry, and can be applied to outdoor areas, areas without power supply and remote areas, etc., with flexible and convenient application scenarios.

[0031] (4) The method for manufacturing the disinfection component of the present invention forms a simple disinfection component, which forms a disinfection device. The disinfection device can be placed directly in a water cup, and disinfection can be performed by shaking the water cup. It is very convenient to use.

[0032] (5) In the method for manufacturing the disinfection component of the present invention, etching is performed in the air to avoid the etching solution dissolving the metal substrate. The electrode component is inverted in the air, and the etching solution will accumulate on the side away from the substrate due to gravity, making it easier to obtain the tip of the conductive electrode without damaging the metal substrate. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the disinfection device.

[0034] Figure 2 This is a schematic diagram of the disinfection component structure;

[0035] Figure 3 This is a schematic diagram showing the distribution of conductive electrodes on a substrate under one condition;

[0036] Figure 4 This is a schematic diagram showing the distribution of conductive electrodes on the substrate in another scenario.

[0037] Figure 5 This is a schematic diagram showing the distribution of conductive electrodes on the substrate in another case.

[0038] Label Explanation:

[0039] 1. Electrode assembly; 10. Conductive electrode; 11. Substrate; 2. Insulating film; 3. Upper insulating base; 4. Lower insulating base. Detailed Implementation

[0040] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments.

[0041] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0042] like Figure 2As shown, the present invention provides a disinfection assembly including an electrode assembly 1 and an insulating film 2. The electrode assembly 1 includes a substrate 11 and a plurality of spaced-apart conductive electrodes 10, with the conductive electrodes 10 located on one side of the substrate 11. The insulating film 2 is attached to one side of the substrate 11 and is located on the same side of the substrate 11 as the conductive electrodes 10. One end of the conductive electrode 10, away from the substrate 11, passes through the insulating film 2 and extends beyond the surface of the insulating film 2. The length of the conductive electrode 10 is set to 1-100 μm. For example, the length of the conductive electrode 10 can be set to 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, 20 μm, 21 μm, 22 μm, 23 μm, 24 μm, 25 μm, 26 μm, 27 μm, 28 μm, 29 μm, 30 μm, 31 μm, 32 μm, 33 μm, 34 μm, 35 μm, 36 μm, 37 μm, 38 μm, 39 μm, 40 μm, 51 μm, 52 μm, 53 μm, 54 μm, 5 Any value among 5μm, 56μm, 57μm, 58μm, 59μm, 60μm, 61μm, 62μm, 63μm, 64μm, 65μm, 66μm, 67μm, 68μm, 69μm, 70μm, 71μm, 72μm, 73μm, 74μm, 75μm, 76μm, 77μm, 78μm, 79μm, 80μm, 81μm, 82μm, 83μm, 84μm, 85μm, 86μm, 87μm, 88μm, 89μm, 90μm, 91μm, 92μm, 93μm, 94μm, 95μm, 96μm, 97μm, 98μm, 99μm, and 100μm, or a range between any two values. The average diameter of the conductive electrode 10 is set to 20-200 nm. For example, the average diameter of the conductive electrode 10 can be set to any value among 20 nm, 25 nm, 30 nm, 35 nm, 40 nm, 45 nm, 50 nm, 55 nm, 60 nm, 65 nm, 70 nm, 75 nm, 80 nm, 85 nm, 90 nm, 95 nm, 100 nm, 105 nm, 110 nm, 115 nm, 120 nm, 125 nm, 130 nm, 135 nm, 140 nm, 145 nm, 150 nm, 155 nm, 160 nm, 165 nm, 170 nm, 175 nm, 180 nm, 185 nm, 190 nm, 195 nm, and 200 nm, or a range between any two values.

[0043] In this design, the conductive electrode 10 and the insulating film 2 are arranged such that the end of the conductive electrode 10 extending beyond the surface of the insulating film 2 is needle-shaped. When a conductive liquid flows across the surface of the insulating film 2, friction generates triboelectric charge. This charge accumulates on the conductive electrode 10, allowing the tip of the conductive electrode 10 to amplify the electric field strength to 10. 4 ~10 6 V / m.

[0044] Specifically, when a conductive liquid flows through the disinfection component, the friction between the liquid and the insulating film 2, such as the liquid flowing over the surface of the insulating film 2 or the liquid colliding with the insulating film 2, can induce charges on the substrate 11. The conductive electrode 10 accumulates these charges, forming a locally enhanced high-voltage electric field at the tip of the conductive electrode 10 away from the substrate 11. Microbial disinfection is then performed through this high-voltage electric field.

[0045] In one scenario, when this disinfection component is applied to disinfect drinking water in the field, the conductive electrode 10 forms a locally enhanced high-voltage electric field. Microorganisms in the water are exposed to this high-voltage electric field for an extremely short time, such as nanoseconds or microseconds. This causes the external structures of the microorganisms (such as cell membranes and viral protein capsids) to become unstable, forming irreversible membrane pores or opening protein channels, leading to extracellular leakage of intracellular contents and thus electroporation inactivation. Compared to existing technologies, the disinfection component in this solution, through the arrangement of the insulating membrane 2, substrate 11, and conductive electrode 10, inactivates microorganisms through electroporation disinfection based on the high-voltage electric field formed by the conductive electrode 10. This disinfection method requires no chemical agents, generates no disinfection byproducts, and has broad-spectrum effectiveness against all microorganisms. Furthermore, in this solution, the insulating membrane 2, substrate 11, and conductive electrode 10 are integrated into the same component, reducing the manufacturing cost of the disinfection structure. Simultaneously, the charge formed between the insulating membrane 2 and the water can be enriched and enhanced in situ through the substrate 11 and conductive electrode 10, thereby achieving in-situ self-powered disinfection without the need for an external voltage or external power management system.

[0046] As a further improvement, such as Figure 3 and Figure 4 As shown, the conductive electrodes 10 are arranged in a relatively regular array. In this arrangement, the number of conductive electrodes 10 at each position is roughly the same, the resistance of the conductive electrodes 10 to the fluid at different positions is roughly the same, and the charge generated between the fluid and the insulating film 2 at different positions is also roughly the same. This makes the difference in the charge accumulated on each conductive electrode 10 and the enhanced electric field strength small, making it easier to judge and control the sterilization effect.

[0047] In another case, such as Figure 5As shown, the conductive electrodes 10 are arranged in an irregular array. The number of conductive electrodes 10 at each position is different. The resistance of the conductive electrodes 10 to the fluid is different at different positions. In some positions, there is more friction between the fluid and the insulating film 2, which generates a larger electric field intensity. In some cases, it can produce unexpected disinfection effects on some microorganisms.

[0048] In this design, the conductive electrode 10 is made of one of the following metals: copper, silver, zinc, or nickel. The substrate 11 is made of the same metal as the conductive electrode 10. Regarding the material of the conductive electrode 10, copper is relatively inexpensive, while nickel may leach heavy metals over time. Silver and zinc are the most preferred materials.

[0049] The insulating film 2 is an insulating polymer film, specifically a film layer formed from one of the following materials: polytetrafluoroethylene (PTFE), polydimethylsiloxane (PDMS), or polydopamine (PDA). The insulating film 2 selected in this design can generate a good frictional effect with the liquid, forming a larger number of charges and improving the electric field enhancement effect of the conductive electrode 10.

[0050] like Figure 1 As shown, this solution also provides a disinfection device, including the aforementioned disinfection component. The disinfection component is generally in the shape of a square sheet, and when the disinfection component is closed, it can form a container with a receiving chamber, the length of which does not exceed 1000mm; and when the disinfection component is closed, the conductive electrode 10 and the insulating film 2 are located inside the receiving chamber. The openings at both ends of the container are respectively connected to the upper insulating seat 3 and the lower insulating seat 4.

[0051] Specifically, the container formed by the assembled disinfection components has openings at both ends. In one case, the container is cylindrical, with a length not exceeding 1000mm. For example, the height of the container is 200mm, roughly the same as a common water cup. The openings at both ends of the container are connected to an upper insulating base 3 and a lower insulating base 4 for easy handling of the disinfection device.

[0052] In other cases, the height of the container can be set to other values ​​as needed. Furthermore, to further improve the disinfection effect, the fluid in all parts of the container should be in contact with the insulating membrane 2 during the disinfection process, ensuring that microorganisms at different locations are inactivated. The cross-sectional area of ​​the container perpendicular to its height should not exceed 0.5 m². 2 .

[0053] The disinfection device in this solution is portable and can be used outdoors, in areas without power supply, and in remote areas. During disinfection, the device is placed in a suitable water cup, and the water to be disinfected is poured into the cup and shaken. The shaking process itself is the disinfection process. During this process, the sufficient friction between the water and the insulating membrane 2 induces a large amount of charge on the substrate 11, which is amplified into a high-voltage electric field through the conductive electrode 10. This high-voltage electric field is used to kill microorganisms. The charge formation in this disinfection device is generated through the sufficient friction between the water and the insulating membrane 2 during shaking, eliminating the need for an external voltage and achieving in-situ self-powered disinfection.

[0054] This solution also provides a method for manufacturing the aforementioned disinfection component, including the following steps:

[0055] S10. Electrodeposition is performed using the template and metal substrate as working electrodes.

[0056] S20. Dissolve the template to obtain electrode assembly 1, wherein the conductive electrode 10 is columnar.

[0057] S30. After immersing the electrode assembly 1 in the etching solution in step S20, it is placed in the air for etching, so that the conductive electrode 10 is needle-shaped.

[0058] S40. A suspension of the insulating film 2 raw material is spin-coated onto one side of the substrate 11 in the electrode assembly 1, and then cured to form the sterilization assembly.

[0059] For ease of description, different embodiments and comparative examples of this manufacturing method are provided below.

[0060] Example 1

[0061] In this embodiment, the template is an alumina (AAO) template, and the metal substrate is copper. Pretreatment is performed before electrodeposition. A copper foil of a specific size is selected according to requirements. During pretreatment, the copper foil is used as the working electrode, and a carbon rod as the counter electrode. Polishing is performed for 360 seconds at constant voltage +4V in an 85% phosphoric acid solution. The alumina (AAO) template is adhered to the copper foil using conductive adhesive. Then, the copper foil covered with the AAO template is placed in a beaker filled with water and subjected to vacuum negative pressure treatment in a vacuum chamber to remove air bubbles from the AAO channels. The copper foil is cleaned during pretreatment, and the template is degassed to obtain a clean AAO template / copper foil.

[0062] The alumina template is 10 μm thick. Several through-holes are also formed on the alumina template, with a center-to-center spacing of 100 nm. During electrodeposition after pretreatment, in step S10, using the AAO template / copper foil as the working electrode, a platinum rod as the counter electrode, and Ag / AgCl as the reference electrode, electrochemical deposition is performed for 900 s in a 1M CuSO4·5H2O (1 mol / L, abbreviated as 1M) electrolyte at a voltage of -0.1 V. Electrochemical deposition is carried out in an electrochemical workstation with a three-electrode system.

[0063] In step S20, the template is dissolved using phosphoric acid solution to obtain electrode assembly 1, at which point the conductive electrode 10 is columnar.

[0064] Specifically, after deposition, the AAO / copper foil electrode is cleaned and dried with deionized water, and then placed in a 5% phosphoric acid solution at 45°C for 1 hour to dissolve the AAO template. After dissolution, the sample is immersed in deionized water for 20 minutes to remove residual phosphoric acid from the surface.

[0065] In step S30, the solute in the etching solution is composed of (NH4)2S2O8 and NaOH. Furthermore, during etching in air, the electrode assembly 1 is inverted, with the end of the conductive electrode 10 furthest from the substrate 11 facing downwards, making it easier to form a needle-shaped conductive electrode. This step, etching in air, avoids the etching solution dissolving the metal substrate. With the electrode assembly 1 inverted in air, the etching solution accumulates on the side furthest from the substrate due to gravity, making it easier to obtain the needle-like tip of the conductive electrode without damaging the metal substrate.

[0066] Specifically, the electrode assembly 1 in step S20 is immersed in a mixed etching solution containing 0.133M(NH4)2S2O8 and 2.667NaOH, and the electrode assembly 1 is placed in air for etching for 10 minutes. Then, the sample is carefully rinsed with deionized water and dried to obtain a needle-shaped copper conductive electrode standing upright on a copper substrate.

[0067] In step S40, the suspension is a polytetrafluoroethylene (PTFE) solution, which can be formed by dissolving polytetrafluoroethylene (PTFE) in ethanol.

[0068] Specifically, the side of the substrate 11 with conductive electrodes in the electrode assembly 1 is dried and cured by spin-coating with a 5wt% polytetrafluoroethylene (PTFE) solution. The spin-coating amount is 100μL, the spin-coating speed is 30rpm, and the temperature is 15℃. The curing temperature is set to 40℃ and the curing time is set to 0.5h. A 50nm thick insulating film 2 is obtained on the surface of the copper foil. The insulating film 2 is lower than the height of the copper needle tip, forming the final sterilization assembly that can directly contact the liquid.

[0069] The disinfection device made using this disinfection component is placed in a water cup of appropriate size, and the user can achieve efficient sterilization by shaking the water cup.

[0070] Example 2

[0071] In this embodiment, the alumina template thickness is 60 μm. Several through-holes are also formed on the alumina template, with a center-to-center spacing of 500 nm. In step S10, using the AAO template / copper foil as the working electrode, a platinum rod as the counter electrode, and Ag / AgCl as the reference electrode, electrochemical deposition is performed for 900 s in a 1 M CuSO4·5H2O electrolyte at -0.6 V. The electrochemical deposition is carried out in a three-electrode electrochemical workstation.

[0072] In step S20, the template is dissolved using phosphoric acid solution to obtain electrode assembly 1, at which point the conductive electrode 10 is columnar.

[0073] Specifically, after deposition, the AAO / copper foil electrode is cleaned and dried with deionized water, and then placed in a 50% phosphoric acid solution at 45°C for 5 hours to dissolve the AAO template. After dissolution, the sample is immersed in deionized water for 20 minutes to remove residual phosphoric acid from the surface.

[0074] In step S30, specifically, the electrode assembly 1 from step S20 is immersed in a mixed etching solution containing 0.133M(NH4)2S2O8 and 2.667NaOH, and the electrode assembly 1 is placed in air for etching for 60 minutes. Then, the sample is carefully rinsed with deionized water and dried to obtain a needle-shaped copper conductive electrode standing upright on the copper substrate.

[0075] In step S40, the suspension is a polytetrafluoroethylene (PTFE) solution.

[0076] Specifically, the conductive electrode side of the substrate 11 in the electrode assembly 1 is dried and cured by spin-coating with a 50wt% polytetrafluoroethylene (PTFE) solution. The spin-coating amount is 2000μL, the spin-coating speed is 1000rpm, and the temperature is 80℃. The curing temperature is set to 120℃ and the curing time is set to 12h. A 50nm thick insulating film 2 is obtained on the surface of the copper foil. The insulating film 2 is lower than the height of the copper needle tip, forming the final sterilization assembly that can directly contact the liquid.

[0077] Other steps or processing methods in this embodiment are the same as those in Embodiment 1, and will not be repeated here.

[0078] Example 3

[0079] In this embodiment, the alumina template thickness is 40 μm. Several through-holes are also formed on the alumina template, with a center-to-center spacing of 300 nm. In step S10, using the AAO template / copper foil as the working electrode, a platinum rod as the counter electrode, and Ag / AgCl as the reference electrode, electrochemical deposition is performed for 900 s in a 1 M CuSO4·5H2O electrolyte at -0.5 V. The electrochemical deposition is carried out in a three-electrode electrochemical workstation.

[0080] In step S20, the template is dissolved using phosphoric acid solution to obtain electrode assembly 1, at which point the conductive electrode 10 is columnar.

[0081] Specifically, after deposition, the AAO / copper foil electrode is cleaned and dried with deionized water, and then placed in a 25% phosphoric acid solution at 45°C for 3 hours to dissolve the AAO template. After dissolution, the sample is immersed in deionized water for 20 minutes to remove residual phosphoric acid from the surface.

[0082] In step S30, specifically, the electrode assembly 1 from step S20 is immersed in a mixed etching solution containing 0.133M(NH4)2S2O8 and 2.667NaOH, and the electrode assembly 1 is placed in air for etching for 35 minutes. Then, the sample is carefully rinsed with deionized water and dried to obtain a needle-shaped copper conductive electrode standing upright on a copper substrate.

[0083] In step S40, the suspension is a polytetrafluoroethylene (PTFE) solution.

[0084] Specifically, the conductive electrode side of the substrate 11 in the electrode assembly 1 is dried and cured by spin-coating with a 25wt% polytetrafluoroethylene (PTFE) solution. The spin-coating amount is 1000μL, the spin-coating speed is 500rpm, and the temperature is 50℃. The curing temperature is set to 80℃ and the curing time is set to 6h. A 50nm thick insulating film 2 is obtained on the copper foil surface. The insulating film 2 is lower than the height of the copper needle tip, forming the final sterilization assembly that can directly contact the liquid.

[0085] Other steps or processing methods in this embodiment are the same as those in Embodiment 1, and will not be repeated here.

[0086] Comparative Example 1

[0087] In this comparative example, the template and copper foil are not pretreated. Other steps, processing methods and parameter settings are the same as in Example 1, and will not be repeated here.

[0088] Comparative Example 2

[0089] In this comparative example, the alumina template thickness was 10 μm. Several through-holes were also formed on the alumina template, with a center-to-center spacing of 500 nm. In step S10, using the AAO template / copper foil as the working electrode, a platinum rod as the counter electrode, and Ag / AgCl as the reference electrode, electrochemical deposition was performed for 900 s in a 1 M CuSO4·5H2O electrolyte under a voltage of -0.6 V. The electrochemical deposition was carried out in a three-electrode electrochemical workstation.

[0090] In step S20, the template is dissolved using phosphoric acid solution to obtain electrode assembly 1, at which point the conductive electrode 10 is columnar.

[0091] Specifically, after deposition, the AAO / copper foil electrode is cleaned and dried with deionized water, and then placed in a 2% phosphoric acid solution at 45°C for 6 hours to dissolve the AAO template. After dissolution, the sample is immersed in deionized water for 20 minutes to remove residual phosphoric acid from the surface.

[0092] In step S30, specifically, the electrode assembly 1 from step S20 is immersed in a mixed etching solution containing 0.133M(NH4)2S2O8 and 2.667NaOH, and the electrode assembly 1 is placed in air for etching for 5 minutes. Then, the sample is carefully rinsed with deionized water and dried to obtain a needle-shaped copper conductive electrode standing upright on the copper substrate.

[0093] In step S40, the suspension is a polytetrafluoroethylene (PTFE) solution.

[0094] Specifically, the side of the substrate 11 with conductive electrodes in the electrode assembly 1 is dried and cured by spin-coating with a 3wt% polytetrafluoroethylene (PTFE) solution. The spin-coating amount is 2500μL, the spin-coating speed is 20rpm, and the temperature is 10℃. The curing temperature is set to 30℃ and the curing time is set to 0.3h. A 50nm thick insulating film 2 is obtained on the surface of the copper foil. The insulating film 2 is lower than the height of the copper needle tip, forming the final sterilization assembly that can directly contact the liquid.

[0095] Other steps or processing methods in this comparative example are the same as those in Example 1, and will not be repeated here.

[0096] Comparative Example 3

[0097] In this comparative example, the alumina template thickness was 60 μm. Several through-holes were also formed on the alumina template, with a center-to-center spacing of 500 nm. In step S10, using the AAO template / copper foil as the working electrode, a platinum rod as the counter electrode, and Ag / AgCl as the reference electrode, electrochemical deposition was performed for 900 s in a 1 M CuSO4·5H2O electrolyte under a voltage of -0.5 V. The electrochemical deposition was carried out in a three-electrode electrochemical workstation.

[0098] In step S20, the template is dissolved using phosphoric acid solution to obtain electrode assembly 1, at which point the conductive electrode 10 is columnar.

[0099] Specifically, after deposition, the AAO / copper foil electrode is cleaned and dried with deionized water, and then placed in a 55% phosphoric acid solution at 45°C for 0.5 h to dissolve the AAO template. After dissolution, the sample is immersed in deionized water for 20 min to remove residual phosphoric acid from the surface.

[0100] In step S30, specifically, the electrode assembly 1 from step S20 is immersed in a mixed etching solution containing 0.133M(NH4)2S2O8 and 2.667NaOH, and the electrode assembly 1 is placed in air for etching for 65 minutes. Then, the sample is carefully rinsed with deionized water and dried to obtain a needle-shaped copper conductive electrode standing upright on the copper substrate.

[0101] In step S40, the suspension is a polytetrafluoroethylene (PTFE) solution.

[0102] Specifically, the conductive electrode side of the substrate 11 in the electrode assembly 1 is dried and cured by spin-coating with a 60wt% polytetrafluoroethylene (PTFE) solution. The spin-coating amount is 80μL, the spin-coating speed is 1200rpm, and the temperature is 90℃. The curing temperature is set to 130℃ and the curing time is set to 13h. A 50nm thick insulating film 2 is obtained on the copper foil surface. The insulating film 2 is lower than the height of the copper needle tip, forming the final sterilization assembly that can directly contact the liquid.

[0103] Other steps or processing methods in this comparative example are the same as those in Example 1, and will not be repeated here.

[0104] Using the disinfection components described in the above embodiments and comparative examples, a disinfection device was made based on the disinfection components. The same amount of water was taken from the same water source, and the shaking disinfection time was consistent. Finally, the disinfection and inactivation of microorganisms in the water were tested, as shown in the table below.

[0105] Table 1

[0106]

[0107] Disinfection experiments were conducted to determine the removal rates of the two bacteria, and the examples within the recommended range all showed good disinfection effects.

[0108] The terms "installation," "setup," "equipped with," and "connection" used herein should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0109] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A disinfection component, characterized in that: It includes an electrode assembly (1) and an insulating film (2). The electrode assembly (1) includes a substrate (11) and a plurality of spaced conductive electrodes (10), the conductive electrodes (10) being located on one side of the substrate (11). The insulating film (2) is attached to one side of the substrate (11) and is located on the same side of the substrate (11) as the conductive electrode (10). One end of the conductive electrode (10) away from the substrate (11) passes through the insulating film (2) and extends beyond the surface of the insulating film (2). The insulating film (2) is one of polytetrafluoroethylene, polydimethylsiloxane or polydopamine; The insulating film (2) is set as follows: a suspension containing the raw material of the insulating film (2) is spin-coated on one side of the substrate (11) in the electrode assembly (1), and then cured to form the disinfection assembly; the mass fraction of the raw material of the insulating film (2) in the suspension is 5~50wt%, the spin-coating amount is 100~2000μL, the spin-coating speed is 30~1000rpm, and the temperature is 15~80℃; the curing temperature is set to 40~120℃, and the curing time is set to 0.5~12h; The length of the conductive electrode (10) is set to 1-100 μm, and the average diameter is set to 20-200 nm. When a conductive liquid flows across the surface of the insulating film (2), frictional charges are generated due to friction. After the charges accumulate on the conductive electrode (10), the conductive electrode (10) can amplify the electric field to 10. 4 ~10 6 V / m.

2. The disinfection component according to claim 1, characterized in that: The conductive electrodes (10) are regularly or irregularly distributed on one side of the substrate (11).

3. The disinfection component according to claim 1 or 2, characterized in that: The conductive electrode (10) is one of the following metals: copper, silver, zinc or nickel.

4. A method for manufacturing a disinfection component according to any one of claims 1-3, characterized in that, Includes the following steps: S10. Electrodeposition is performed using the template and metal substrate as working electrodes. S20, dissolve the template to obtain an electrode assembly (1), wherein the conductive electrode (10) is columnar; S30. After immersing the electrode assembly (1) in the etching solution in step S20, it is placed in the air for etching, so that the conductive electrode (10) is needle-shaped. S40. A suspension of the insulating film (2) raw material is spin-coated on one side of the substrate (11) in the electrode assembly (1), and then cured to form the sterilization assembly.

5. The method for manufacturing a disinfection component according to claim 4, characterized in that: The template is an alumina template, and the thickness of the alumina template is 10~60μm; The alumina template has several through holes with a center-to-center spacing of 100~500nm, and the voltage for electrodeposition is -1.0~1.0V.

6. The method for manufacturing a disinfection component according to claim 4 or 5, characterized in that: In step S20, the template is dissolved using a phosphoric acid solution; The phosphoric acid solution has a mass fraction of 5-50 wt%, and the dissolution time is 1-5 h.

7. The method for manufacturing a disinfection component according to claim 4, characterized in that: In step S30, during etching in air, the electrode assembly (1) is inverted so that the end of the conductive electrode (10) away from the substrate (11) faces downward. The solute in the etching solution consists of (NH4)2S2O8 and NaOH, and the etching time is 10-60 min.

8. A disinfection device, characterized in that: Includes the disinfection component as described in any one of claims 1-3; The disinfection components are arranged to form a container with a receiving chamber, the length of which does not exceed 1000mm; the conductive electrode (10) and the insulating film (2) are located inside the receiving chamber; the openings at both ends of the receiving body are respectively connected to the upper insulating seat (3) and the lower insulating seat (4).

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