Disinfection device, disinfection assembly and manufacturing method of disinfection assembly

Abstract

The invention discloses a disinfection device, a disinfection assembly and a manufacturing method of the disinfection assembly, 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 conductive electrodes distributed at intervals, and the conductive electrodes are located on one side of the substrate; the insulating film is attached to one side of the substrate, the insulating film and the conductive electrode are located on the same side of the substrate, and the end, away from the substrate, of the conductive electrode penetrates through the insulating film and exceeds the surface of the insulating film; the length of the conductive electrode is set to be 1-100 [mu] m, the average diameter of the conductive electrode is set to be 20-200 nm, when conductive liquid flows through the surface of the insulating film, frictional charges are generated due to friction, and after the charges are accumulated to the conductive electrode, the conductive electrode can amplify an electric field to 104-106 V / m. Microorganism inactivation is carried out under the electric field intensity, in-situ self-powered disinfection is achieved, and external voltage and an external power management system do not need to be provided.

Description

Technical Field

[0001] The present invention relates to the technical field of outdoor portable disinfection devices, and more specifically, to a disinfection device, a disinfection component and a manufacturing method thereof. Background Art

[0002] When working in the wild, doing outdoor sports or in emergency disaster relief, it is often necessary to obtain water locally. However, the water obtained in the wild generally has poor sanitation and cannot meet the drinking water standard. To ensure drinking water safety, people often need to carry a sufficient amount of drinking water, which increases the burden of traveling.

[0003] Currently, existing disinfection devices usually adopt chemical or physical disinfection. Chemical disinfection relies on chemical agents (such as disinfectant solution, ozone) and generating devices (such as nozzles, ozone generators), which not only make the overall structure of the device complex and the manufacturing cost high, but also have problems such as low disinfection efficiency and generation of disinfection by-products. Physical disinfection (such as ultraviolet irradiation) can directly kill various bacteria, viruses, parasites, algae and other pathogens. However, the ultraviolet lamp sleeve is prone to scaling and needs to be replaced regularly, and its operation requires an external power source, which is not suitable for outdoor environments.

[0004] Electroporation disinfection based on nanowire-enhanced local electric field, as a new physical disinfection method, mainly uses one-dimensional nanowires with a high aspect ratio (the ratio of length to diameter) to form a local high-voltage electric field (> 10 6 V / m) at the tip, destroying the external structure of microorganisms and inactivating them. Electroporation disinfection has been proven effective against bacteria, viruses and protists. The patent application with publication number CN113461120A discloses a method for electroporation disinfection of nanowire electrodes enhanced by an alternating electric field, which has high and stable disinfection effects. However, in order to generate a strong electric field, electroporation disinfection still needs to rely on an external power source to provide a driving voltage.

[0005] Therefore, the application of existing disinfection methods in outdoor scenarios still needs to be improved. Summary of the Invention

[0006] The present invention provides a disinfection device, a disinfection component and a manufacturing method thereof, which solve the problems of complex structure, generation of disinfection by-products and dependence on external power supply of existing disinfection methods, and can be more portable and safe to be applied in outdoor occasions.

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

[0008] A disinfection component, comprising an electrode component and an insulating film,

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

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

[0011] The length of the conductive electrode is set to 1 - 100 μm, and the average diameter is set to 20 - 200 nm. When a conductive liquid flows through 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.

[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 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 described disinfection component, including the following steps:

[0016] S10. Using a template and a metal substrate as working electrodes for electrodeposition;

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

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

[0019] S40. Spin-coating a suspension solution containing the raw material of the insulating film on one side of the substrate in the electrode assembly, and finally curing to form the described disinfection component.

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

[0021] A plurality of through holes are formed in the alumina template, the center distance between the through holes is 100 - 500 nm, and the voltage during 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 mass fraction of the phosphoric acid solution is 5 - 50 wt%, and the dissolution time during dissolution is 1 - 5 h.

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

[0024] The solute in the etching solution consists 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 dosage is 100 - 2000 μL, the spin - coating speed is 30 - 1000 rpm, and the temperature is 15 - 80 °C; when curing, the temperature is set to 40 - 120 °C, and the curing time is set to 0.5 - 12 h.

[0026] The present invention also provides a disinfection device, including the above - mentioned disinfection component; the disinfection component encloses to form a container body with an accommodation chamber, the length of the container body does not exceed 1000 mm; the conductive electrode and the insulating film are located inside the accommodation chamber; the openings at both ends of the container body are respectively connected to an upper insulating seat and a lower insulating seat.

[0027] Adopting the technical solution provided by the present invention, compared with the prior art, it has the following beneficial effects:

[0028] (1) For the disinfection component of the present invention, the length of the conductive electrode in the disinfection component is set to 1 - 100 μm, and the average diameter is set to 20 - 200 nm. When a conductive liquid flows through 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 disinfection is carried out under this electric field intensity. This disinfection method does not require the addition of chemical agents, does not generate disinfection by - products, has broad - spectrum effectiveness against all microorganisms, and realizes in - situ self - powered disinfection without the need to provide an external voltage and an external power supply management system.

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

[0030] (3) For the disinfection device of the present invention, including the above - mentioned disinfection component; the disinfection component encloses to form a container body with an accommodation chamber, and the openings at both ends of the container body are respectively connected to an upper insulating seat and a lower insulating seat. The structure is simple and convenient to carry, and can be applied to outdoor areas, areas without power supply, remote areas, etc., and the application scenarios are flexible and convenient.

[0031] (4) The manufacturing method of the disinfection component of the present invention forms a disinfection component with a simple structure. The disinfection component forms a disinfection device, which can be directly placed in a water cup, and the water cup can be shaken to carry out disinfection, making it very convenient to use.

[0032] (5) In the manufacturing method of the disinfection component of the present invention, when etching is carried out, etching is carried out in the air to avoid the etching solution dissolving the metal substrate. The electrode component is arranged upside down in the air, and the etching solution will accumulate on the side far from the substrate due to the action of gravity, making it easier to obtain the tip of the conductive electrode without damaging the metal substrate. Brief Description of the Drawings

[0033] Figure 1 It is a schematic structural diagram of the disinfection device;

[0034] Figure 2 It is a schematic structural diagram of the disinfection component;

[0035] Figure 3 It is a schematic diagram of the distribution position of the conductive electrode on the substrate in one case;

[0036] Figure 4 It is a schematic diagram of the distribution position of the conductive electrode on the substrate in another case;

[0037] Figure 5 It is a schematic diagram of the distribution position of the conductive electrode on the substrate in yet another case.

[0038] Reference Numeral Explanation:

[0039] 1. Electrode component; 10. Conductive electrode; 11. Substrate; 2. Insulating film; 3. Upper insulating seat; 4. Lower insulating seat. Detailed Embodiments

[0040] To further understand the content of the present invention, the present invention will be described in detail with reference to the drawings and embodiments.

[0041] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limited conditions under which the present invention can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of description and are not used to limit the scope that can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope that the present invention can be implemented.

[0042] Such as Figure 2As shown in the figure, the present invention provides a disinfection component, which includes an electrode component 1 and an insulating film 2. Among them, the electrode component 1 includes a substrate 11 and a plurality of spaced conductive electrodes 10, and the conductive electrodes 10 are located on one side of the substrate 11. The insulating film 2 is attached to one side of the substrate 11 and is 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 this end extends beyond the surface of the insulating film 2. The length of the conductive electrode 10 is set to be 1-100 μm. For example, the length of the conductive electrode 10 can be set to any value among 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, 55 μm, 56 μm, 57 μm, 58 μm, 59 μm, 60 μm, 61 μm, 62 μm, 63 μm, 64 μm, 65 μm, 66 μm, 67 μm, 68 μm, 69 μm, 70 μm, 71 μm, 72 μm, 73 μm, 74 μm, 75 μm, 76 μm, 77 μm, 78 μm, 79 μm, 80 μm, 81 μm, 82 μm, 83 μm, 84 μm, 85 μm, 86 μm, 87 μm, 88 μm, 89 μm, 90 μm, 91 μm, 92 μm, 93 μm, 94 μm, 95 μm, 96 μm, 97 μm, 98 μm, 99 μm, 100 μm, or the range between any two values. The average diameter of the conductive electrode 10 is set to be 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, 200 nm, or the range between any two values.

[0043] In this solution, the conductive electrode 10 and the insulating film 2 are arranged such that one end of the conductive electrode 10 extending beyond the surface of the insulating film 2 is needle-shaped. When a conductive liquid flows over the surface of the insulating film 2, frictional charges are generated due to friction. After the charges accumulate on the conductive electrode 10, the tip of the conductive electrode 10 can 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 when the liquid flows over the surface of the insulating film 2 or when the liquid collides with the insulating film 2, can induce charges on the substrate 11. The conductive electrode 10 accumulates these charges, and a locally enhanced high-voltage electric field is formed at the tip of the conductive electrode 10 away from the substrate 11. Microorganisms are disinfected through this high-voltage electric field.

[0045] In one case, when this disinfection component is applied to disinfecting wild drinking water, the conductive electrode 10 forms a locally enhanced high-voltage electric field. Microorganisms in the water body are exposed to the vicinity of this high-voltage electric field in a very short time, such as in nanoseconds or microseconds. The external structures of the microorganisms (such as cell membranes and virus protein capsids) become unstable, forming irreversible membrane pores or opening protein channels, resulting in the leakage of intracellular substances, and thus electropermeation inactivation occurs. Compared with the prior art, the disinfection component in this solution, through the arrangement of the insulating film 2, the substrate 11, and the conductive electrode 10, inactivates microorganisms based on electropermeation disinfection of the high-voltage electric field formed by the conductive electrode 10. This disinfection method does not require the addition of chemical agents, does not generate disinfection by-products, and has broad-spectrum effectiveness against all microorganisms. Moreover, in this solution, the insulating film 2, the substrate 11, and the conductive electrode 10 are integrated into the same component, reducing the manufacturing cost of the disinfection structure. At the same time, the charges formed between the insulating film 2 and the water body can be enriched and enhanced in situ through the substrate 11 and the conductive electrode 10, thus realizing in-situ self-powered disinfection without the need to provide an external voltage and an external power management system.

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

[0047] In another case, as Figure 5As shown, the conductive electrodes 10 are arranged in an irregular array. In this arrangement, the number of conductive electrodes 10 at each position is different, and the resistance formed by the conductive electrodes 10 to the fluid at different positions is also different. At some positions, there is more friction between the fluid and the insulating film 2, which will generate a greater electric field strength. In some cases, it will produce an unexpected disinfection effect on some microorganisms.

[0048] In this solution, the conductive electrode 10 is one of copper, silver, zinc, or nickel. The substrate 11 is made of the same metal material as the conductive electrode 10. When selecting the material of the conductive electrode 10, copper has a lower cost, and nickel may precipitate heavy metals after long-term use. Most preferably, silver and zinc can be selected.

[0049] The insulating film 2 is an insulating polymer film. Specifically, the insulating film 2 is a film layer formed of one of polytetrafluoroethylene (PTFE), polydimethylsiloxane (PDMS), or polydopamine (PDA). The selected insulating film 2 in this solution can produce a good friction effect with the liquid, form a large number of charges, and improve the electric field enhancement effect of the conductive electrode 10.

[0050] As Figure 1 shown, this solution also provides a disinfection device, including the disinfection component described above. The disinfection component is integrally in the shape of a square sheet. After surrounding the disinfection component, a container with an accommodation chamber can be formed. The length of the container does not exceed 1000 mm. Moreover, when the disinfection component is surrounded, the conductive electrode 10 and the insulating film 2 are located inside the accommodation chamber. Insulating seats 3 and lower insulating seats 4 are respectively connected to the openings at both ends of the container.

[0051] Specifically, both ends of the container formed after surrounding the disinfection component have openings. In one case, the container is cylindrical, and the length of the container does not exceed 1000 mm. For example, the height of the container is 200 mm, which is roughly the same as that of a common water cup. Insulating seats 3 and lower insulating seats 4 are connected to the openings at both ends of the container, which is convenient for holding the disinfection device.

[0052] In other cases, according to needs, the height of the container can also be set to other values. In addition, to further improve the disinfection effect, during the disinfection process, the fluid everywhere in the container can be fully brought into contact with the insulating film 2 so that microorganisms at different positions can be inactivated. The cross-sectional area of the container perpendicular to its height direction does not exceed 0.5 m 2 .

[0053] The disinfection device in this solution is easy to carry and can be applied to outdoor areas, areas without power supply, remote areas, etc. When disinfecting, put the disinfection device into a suitable water cup, pour the water body to be disinfected into the water cup and shake it. The shaking process is the disinfection process. During this process, the water body fully rubs against the insulating film 2, inducing a large amount of charges on the substrate 11, which are enhanced into a high-voltage electric field through the conductive electrode 10, and microbial disinfection is carried out through this high-voltage electric field. The formation of the charges of the disinfection device is generated by the full friction between the water body and the insulating film 2 during the shaking process, without the need to provide an external voltage, realizing in-situ self-powered disinfection.

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

[0055] S10. Use the template and the metal substrate as working electrodes for electrodeposition;

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

[0057] S30. After soaking the electrode assembly 1 in step S20 with the etching solution, place it in the air for etching to make the conductive electrode 10 needle-shaped;

[0058] S40. Spin-coat a suspension solution containing the raw material of the insulating film 2 on one side of the substrate 11 in the electrode assembly 1, and finally cure it to form the disinfection component.

[0059] For the convenience of description, different embodiments and comparative examples of this manufacturing method are provided below for illustration.

[0060] Example 1

[0061] In this embodiment, the template is an alumina (AAO) template and the metal substrate is copper. Pretreatment is carried out before electrodeposition. Select a copper foil of a certain size according to requirements. In the pretreatment, use the copper foil as the working electrode and the carbon rod as the counter electrode, and polish it at a constant voltage of +4V in 85% phosphoric acid solution for 360s; paste the anodic alumina (AAO) template on the copper foil through conductive glue, and then put the copper foil covered with the AAO template into a beaker filled with water and place it in a vacuum chamber for vacuum negative pressure treatment to remove the bubbles in the AAO channels. In the pretreatment, the copper foil is cleaned and the template is degassed to obtain a clean AAO template / copper foil.

[0062] The thickness of the alumina template is 10 μm. A number of through holes are also provided on the alumina template, and the center distance of the through holes is 100 nm. When electro-deposition is carried out after pretreatment, in step S10, with the AAO template / copper foil as the working electrode, a platinum rod as the counter electrode, and Ag / AgCl as the reference electrode, -0.1 V is applied in a 1M CuSO4·5H2O (abbreviated as 1M for 1 mol / L) electrolyte for 900 s of electrochemical deposition. The electrochemical deposition is carried out in an electrochemical workstation of a three-electrode system.

[0063] In step S20, a phosphoric acid solution is used to dissolve the template to obtain the electrode assembly 1. At this time, the conductive electrode 10 is columnar.

[0064] Specifically in this step, after the deposition is completed, the AAO / copper foil electrode is washed with deionized water and dried, and then placed in a 5% by mass phosphoric acid solution at 45 °C for 1 h to dissolve the AAO template. After the dissolution is completed, the sample is immersed in deionized water for 20 min to remove the residual phosphoric acid on the surface.

[0065] In step S30, the solute in the etching solution consists of (NH4)2S2O8 and NaOH. Moreover, when etching is carried out in the air, the electrode assembly 1 is arranged upside down, so that the end of the conductive electrode 10 away from the substrate 11 faces downward, making it easier to form a needle-shaped conductive electrode. In this step, etching is carried out in the air to prevent the etching solution from dissolving the metal substrate. When the electrode assembly 1 is arranged upside down in the air, the etching solution will accumulate on the side away from the substrate due to the action of gravity, making it easier to obtain the 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 0.133 M (NH4)2S2O8 and 2.667 NaOH, and the electrode assembly 1 is placed in the air for etching for 10 minutes, and 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.

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

[0068] Specifically, a 5 wt% polytetrafluoroethylene (PTFE) solution is spin-coated on the side of the substrate 11 in the electrode assembly 1 with the conductive electrode and dried and cured. The spin-coating dosage is 100 μL, the spin-coating speed is 30 rpm, and the temperature is 15 °C; when curing, the temperature is set to 40 °C and the curing time is set to 0.5 h to prepare an insulating film 2 with a thickness of 50 nm on the copper foil surface. The insulating film 2 is lower than the height of the copper needle tip to form the final disinfection assembly, which can be in direct contact with the liquid.

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

[0070] Example 2

[0071] In this example, the thickness of the alumina template is 60 μm. A number of through holes are also provided on the alumina template, and the center spacing of the through holes is 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, -0.6 V is applied in a 1 M CuSO4·5H2O electrolyte for electrochemical deposition for 900 s. The electrochemical deposition is carried out in an electrochemical workstation with a three-electrode system.

[0072] In step S20, the template is dissolved using a phosphoric acid solution to obtain the electrode assembly 1. At this time, the conductive electrode 10 is columnar.

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

[0074] In step S30, specifically, the electrode assembly 1 in step S20 is immersed in a mixed etching solution containing 0.133 M (NH4)2S2O8 and 2.667 NaOH, and the electrode assembly 1 is etched in the air 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, a 50 wt% polytetrafluoroethylene (PTFE) solution is spin-coated on the side of the substrate 11 in the electrode assembly 1 with the conductive electrode and dried and cured. The spin-coating dosage is 2000 μL, the spin-coating speed is 1000 rpm, and the temperature is 80 °C; the curing temperature is set to 120 °C and the curing time is set to 12 h to prepare an insulating film 2 with a thickness of 50 nm on the copper foil surface. The insulating film 2 is lower than the height of the copper needle tip to form the final disinfection component, which can be in direct contact with the liquid.

[0077] Other steps or treatment methods in this example are the same as those in Example 1 and will not be elaborated here.

[0078] Example 3

[0079] In this embodiment, the thickness of the alumina template is 40 μm. A number of through holes are also formed in the alumina template, and the center-to-center distance of the through holes is 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, -0.5 V is applied in a 1 M CuSO4·5H2O electrolyte for 900 s of electrochemical deposition. The electrochemical deposition is carried out in an electrochemical workstation with a three-electrode system.

[0080] In step S20, the template is dissolved using a phosphoric acid solution to obtain the electrode assembly 1. At this time, the conductive electrode 10 is columnar.

[0081] Specifically in this step, after the deposition is completed, the AAO / copper foil electrode is washed with deionized water and dried, and then placed in a 25% by mass phosphoric acid solution at 45 °C for 3 h to dissolve the AAO template. After the dissolution is completed, the sample is immersed in deionized water for 20 min to remove the residual phosphoric acid on the surface.

[0082] In step S30, specifically, the electrode assembly 1 in step S20 is immersed in a mixed etching solution containing 0.133 M (NH4)2S2O8 and 2.667 NaOH, and the electrode assembly 1 is etched in the air 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 the copper substrate.

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

[0084] Specifically, a 25 wt% polytetrafluoroethylene (PTFE) solution is spin-coated on the side of the substrate 11 in the electrode assembly 1 having the conductive electrode and dried and cured. The spin-coating dosage is 1000 μL, the spin-coating speed is 500 rpm, and the temperature is 50 °C; the curing temperature is set to 80 °C, and the curing time is set to 6 h to prepare an insulating film 2 with a thickness of 50 nm on the copper foil surface. The insulating film 2 is lower than the height of the copper needle tip to form the final disinfection assembly, which can be directly contacted with the liquid.

[0085] In this embodiment, other steps or treatment methods are the same as those in Embodiment 1 and will not be elaborated here.

[0086] Comparative Example 1

[0087] In this comparative example, the template and the copper foil are not pretreated. Other steps, treatment methods, and various parameter settings are the same as those in Embodiment 1 and will not be elaborated here.

[0088] Comparative Example 2

[0089] In this comparative example, the thickness of the alumina template is 10 μm. A number of through-holes are also provided on the alumina template, and the center-to-center spacing of the through-holes is 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, a voltage of -0.6 V is applied in a 1 M CuSO4·5H2O electrolyte for 900 s of electrochemical deposition. The electrochemical deposition is carried out in an electrochemical workstation with a three-electrode system.

[0090] In step S20, a phosphoric acid solution is used to dissolve the template to obtain the electrode assembly 1. At this time, the conductive electrode 10 is columnar.

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

[0092] In step S30, specifically, the electrode assembly 1 in step S20 is immersed in a mixed etching solution containing 0.133 M (NH4)2S2O8 and 2.667 NaOH, and the electrode assembly 1 is placed in the air for etching for 5 minutes, and 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, a 3 wt% polytetrafluoroethylene (PTFE) solution is spin-coated on the side of the substrate 11 in the electrode assembly 1 with the conductive electrode and dried and cured. The spin-coating dosage is 2500 μL, the spin-coating speed is 20 rpm, and the temperature is 10 °C; the curing temperature is set to 30 °C, and the curing time is set to 0.3 h to prepare an insulating film 2 with a thickness of 50 nm on the copper foil surface. The insulating film 2 is lower than the height of the copper needle tip to form the final disinfection assembly, which can be in direct contact with the liquid.

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

[0096] Comparative Example 3

[0097] In this comparative example, the thickness of the alumina template is 60 μm. A number of through-holes are also provided on the alumina template, and the center-to-center spacing of the through-holes is 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, a voltage of -0.5 V is applied in a 1 M CuSO4·5H2O electrolyte for 900 s of electrochemical deposition. The electrochemical deposition is carried out in an electrochemical workstation with a three-electrode system.

[0098] In step S20, a phosphoric acid solution is used to dissolve the template to obtain the electrode assembly 1. At this time, the conductive electrode 10 is columnar.

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

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

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

[0102] Specifically, a 60 wt% polytetrafluoroethylene (PTFE) solution is spin-coated on the side of the substrate 11 in the electrode assembly 1 with the conductive electrode and dried and cured. The spin-coating dosage is 80 μL, the spin-coating speed is 1200 rpm, and the temperature is 90 °C; the curing temperature is set to 130 °C and the curing time is set to 13 h to prepare an insulating film 2 with a thickness of 50 nm on the copper foil surface. The insulating film 2 is lower than the height of the copper needle tip to form the final disinfection assembly, which can be in direct contact with the liquid.

[0103] In this comparative example, other steps or treatment methods are the same as those in Example 1 and will not be elaborated here.

[0104] Through the disinfection assemblies in the above-mentioned examples and comparative examples, a disinfection device is manufactured according to the disinfection assembly. The same amount of water is taken from the same water source, the shaking disinfection time is the same, and finally the disinfection and inactivation of microorganisms in the water are detected as shown in the following table.

[0105] Table 1

[0106]

[0107] A disinfection experiment was carried out to measure the removal rates of two kinds of bacteria. The examples within the recommended range all showed good disinfection effects.

[0108] Some of the terms referred to herein, such as "installed", "set up", "provided with", "connected", should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, components or parts. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0109] The present invention and its embodiments have been described schematically above. The description is not restrictive, and only one of the embodiments of the present invention is shown in the drawings. The actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design, without creative work, structural forms and embodiments similar to the technical solution without departing from the purpose of the present invention, they 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 number of conductive electrodes (10) distributed at intervals. The conductive electrodes (10) are located on one side of the substrate (11). The insulating film (2) is attached to one side of the substrate (11) and is 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 this end extends beyond the surface of the insulating film (2). 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 through 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 distributed on one side of the substrate (11) regularly or irregularly.

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

4. The disinfection component according to claim 1 or 2, characterized in that: The insulating film (2) is one of polytetrafluoroethylene, polydimethylsiloxane or polydopamine.

5. A method for manufacturing the disinfection component according to any one of claims 1-4, characterized in that, It includes the following steps: S10: Use a template and a metal substrate as working electrodes for electrodeposition. S20: Dissolve the template to obtain the electrode assembly (1), wherein the conductive electrodes (10) are columnar. S30: After the electrode assembly (1) in step S20 is immersed in an etching solution, place it in the air for etching so that the conductive electrodes (10) become needle-shaped. S40: Spin-coat a suspension solution containing the raw material of the insulating film (2) on one side of the substrate (11) in the electrode assembly (1), and finally cure it to form the disinfection assembly.

6. The method for manufacturing the disinfection component according to claim 5, wherein: The template is an alumina template, and the thickness of the alumina template is 10 - 60 μm. A number of through holes are formed in the alumina template, the center distance of the through holes is 100 - 500 nm, and the voltage during electrodeposition is -1.0 - 1.0 V.

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

8. The method for manufacturing a disinfection component according to claim 5, characterized in that: In step S30, when etching in the air, the electrode assembly (1) is arranged upside down so that one end of the conductive electrode (10) away from the substrate (11) faces downward. The solute in the etching solution is composed of (NH4)2S2O8 and NaOH, and the etching time is 10 - 60 min.

9. The method for manufacturing the disinfection component according to claim 5, characterized in that: In step S40, the mass fraction of the raw material of the insulating film (2) in the suspension solution is 5 - 50 wt%, the spin-coating dosage is 100 - 2000 μL, the spin-coating speed is 30 - 1000 rpm, and the temperature is 15 - 80 °C; the temperature during curing is set to 40 - 120 °C, and the curing time is set to 0.5 - 12 h.

10. A disinfection device, characterized in that: It includes the disinfection assembly according to any one of claims 1 - 4. The disinfection assembly encloses to form a container body with an accommodation chamber. The length of the container body does not exceed 1000 mm; the conductive electrodes (10) and the insulating film (2) are located inside the accommodation chamber; insulating seats (3) and lower insulating seats (4) are respectively connected to the openings at both ends of the container body.

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