CN114351142A - Preparation method of antibacterial enamel liner, antibacterial enamel liner and water heater comprising antibacterial enamel liner - Google Patents
Preparation method of antibacterial enamel liner, antibacterial enamel liner and water heater comprising antibacterial enamel liner Download PDFInfo
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- CN114351142A CN114351142A CN202111424885.4A CN202111424885A CN114351142A CN 114351142 A CN114351142 A CN 114351142A CN 202111424885 A CN202111424885 A CN 202111424885A CN 114351142 A CN114351142 A CN 114351142A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D5/00—Coating with enamels or vitreous layers
- C23D5/02—Coating with enamels or vitreous layers by wet methods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/14—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
- C03C8/20—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions containing titanium compounds; containing zirconium compounds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
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Abstract
The application relates to a preparation method of an antibacterial enamel liner, the antibacterial enamel liner and a water heater comprising the antibacterial enamel liner. Mixing titanium dioxide with a metal material with antibacterial activity, ball-milling, and calcining to obtain an antibacterial material; mixing the enamel dry powder with purified water, adding an antibacterial material, stirring and ball-milling to obtain enamel glaze slurry containing the antibacterial material; and coating the enamel glaze slip containing the antibacterial material on the inner wall of the enamel liner, adjusting the adsorption quantity of the glaze slip, and drying and sintering to obtain the antibacterial enamel liner. According to the scheme provided by the application, the photoproduction electrons generated by the titanium dioxide through ultraviolet illumination can be utilized to reduce the metal material with antibacterial activity into elemental metal, so that the antibacterial enamel liner prepared by the preparation method disclosed by the application can realize the antibacterial effect by utilizing the separated elemental metal (such as metal silver or metal copper) under low illumination intensity (namely, the antibacterial effect generated by the titanium dioxide is weaker).
Description
Technical Field
The application relates to the technical field of antibacterial enamel inner containers, in particular to a preparation method of an antibacterial enamel inner container, the antibacterial enamel inner container and a water heater comprising the antibacterial enamel inner container.
Background
At present, the enamel liner of the water heater is large in volume and high in water storage capacity, when the enamel liner is used for storing water for a long time, escherichia coli, staphylococcus aureus and the like in water can grow, the quality of water is affected, the health of a user can be harmed, the water heater liner is inconvenient to disassemble and difficult to clean, vicious circle of pollution is easily caused, and the normal use of the user is affected. With the increasing emphasis on quality of life, the development of enamel liners with antibacterial and bacteriostatic functions is urgently needed.
In the related art, some people try to adopt the nano titanium dioxide photocatalyst catalysis enamel inner container in the industry, but the antibacterial effect can be realized only by strong ultraviolet irradiation, when the water quality is poor, and when the impurity content in the water is more, the illumination intensity of the area far away from the inside ultraviolet irradiation can be reduced, so that the water under the low illumination intensity can not be well sterilized, the sterilization effect is influenced, and in the sterilization process, the power consumption can be increased by the high illumination intensity all the time, therefore, when the nano titanium dioxide photocatalyst catalysis is adopted for sterilization, the enamel inner container still having the antibacterial effect under the low illumination intensity needs to be prepared.
Disclosure of Invention
In order to overcome the problems in the related art, the application provides a preparation method of an antibacterial enamel liner, the antibacterial enamel liner and a water heater containing the antibacterial enamel liner, and the preparation method of the antibacterial enamel liner, the antibacterial enamel liner and the water heater containing the antibacterial enamel liner can reduce a metal material with antibacterial activity into a simple substance metal by utilizing photo-generated electrons generated by ultraviolet illumination of titanium dioxide, so that the antibacterial enamel liner prepared by the preparation method can also realize an antibacterial effect by utilizing the separated simple substance metal (such as metal silver or metal copper) under low illumination intensity (namely weak antibacterial effect generated by titanium dioxide).
In order to achieve the purpose, the invention adopts the following technical scheme:
the preparation method of the antibacterial enamel liner is characterized by comprising the following steps:
s1, mixing titanium dioxide with a metal material with antibacterial activity, ball-milling, and calcining at 800-900 ℃ to obtain an antibacterial material;
s2, mixing the components in a weight ratio of 100: 30-100: 40, mixing the enamel dry powder with purified water, adding the antibacterial material accounting for 0.5-1.5 percent of the enamel dry powder according to the weight ratio, stirring and ball-milling to prepare enamel glaze slurry containing the antibacterial material;
s3, coating the enamel glaze slurry containing the antibacterial material on the inner wall of the enamel liner by adopting an enamel process, adjusting the adsorption quantity of the glaze slurry to 20-24 g, drying at the temperature of 120-150 ℃ for 25-40 min, and then sintering at the high temperature of 830-870 ℃ for 8-12 min to form the antibacterial enamel liner coating, thereby obtaining the antibacterial enamel liner.
Furthermore, an ultraviolet lamp is arranged in the antibacterial enamel liner.
Further, a driving device is arranged in the antibacterial enamel liner, and the driving power of the driving device comprises a high-power mode and a low-power mode and is used for controlling the power of the ultraviolet lamp.
Further, the preparation steps of the enamel liner comprise: welding and forming the inner container of the water heater; the liner is subjected to sand blasting treatment, so that the sand blasting roughness is greater than 25 μm, Ra is greater than 3 μm, and the cleanliness is greater than or equal to Sa2.5.
Further, the particle size of the titanium dioxide is 30-40 nm.
Further, the antimicrobial active metal material includes a silver-containing compound, and/or a copper-containing compound.
Further, the silver-containing compound is 0.5-3% of silver nitrate, and the copper-containing compound is 0.5-3% of copper nitrate.
Further, the thickness of the antibacterial enamel inner container coating is 200-350 μm.
The application also provides an antibacterial enamel liner which is prepared by adopting the preparation method of the antibacterial enamel liner.
The application also provides a water heater, the water heater includes foretell antibiotic enamel inner bag.
The technical scheme provided by the application can comprise the following beneficial effects: the antibacterial material is prepared by fully mixing titanium dioxide and a metal material with antibacterial activity, the doped metal material can prevent the compounding of titanium dioxide electron-hole pairs and promote the effective separation of the electron-hole pairs, so that the antibacterial performance of the titanium dioxide is more stable, then the antibacterial material is added into the mixture of enamel dry powder and purified water to prepare enamel glaze slurry, then the enamel glaze slurry is coated on the inner wall of an enamel liner through an enamel process to form an antibacterial enamel liner coating, so that the antibacterial enamel liner is prepared, the metal material with antibacterial activity can be reduced into elemental metal by utilizing photoproduction electrons generated by the ultraviolet irradiation of the titanium dioxide, and the antibacterial enamel liner prepared by the preparation method can realize the antibacterial effect by utilizing the precipitated elemental metal (such as metallic silver or metallic copper) under low illumination intensity (namely weaker antibacterial effect generated by the titanium dioxide), the sterilization rate to colibacillus and staphylococcus aureus is more than 95 percent, and the requirement on the antibacterial effect is met.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application, as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.
FIG. 1 is a flow chart of a method for manufacturing an antibacterial enamel liner according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of an antimicrobial porcelain enamel liner shown in an embodiment of the present application;
fig. 3 is an enlarged schematic view of a in fig. 2.
Description of reference numerals:
1. an upper end enclosure assembly; 2. a lower seal head assembly; 3. a middle section of the inner container; 4. coating the antibacterial enamel liner; 5. an ultraviolet lamp.
Detailed Description
Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Water heater enamel inner bag is because the inner bag volume is great, the water storage capacity is more, long-term water storage and when not using in the enamel inner bag, escherichia coli in aquatic, staphylococcus aureus etc. just can breed, not only cause the influence to the quality of water, also can harm user's health, also somebody's time adopts nanometer titanium dioxide photocatalyst catalysis enamel in the trade, nevertheless need shine through stronger ultraviolet ray and just can realize antibiotic effect, when quality of water is relatively poor, when aquatic contains impurity more, the illumination intensity that inside ultraviolet irradiation was apart from the region far away can descend, lead to the water under the low illumination intensity can not be fine by disinfecting, influence bactericidal effect
In view of the above problems, embodiments of the present application provide a method for preparing an antibacterial enamel liner, and a method for preparing a water heater including the same, which can reduce a metal material with antibacterial activity to a simple substance metal by using photo-generated electrons generated by ultraviolet irradiation of titanium dioxide, so that the antibacterial enamel liner prepared by the preparation method of the present application can also realize an antibacterial effect by using a precipitated simple substance metal (such as metallic silver or metallic copper) under low illumination intensity (i.e., the antibacterial effect generated by titanium dioxide is weak).
The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Example one
Referring to fig. 1, a method for preparing an antibacterial enamel liner is characterized by comprising the following steps:
s1, mixing titanium dioxide with a metal material with antibacterial activity, ball-milling, and calcining at 800-900 ℃ to obtain an antibacterial material;
s2, mixing the components in a weight ratio of 100: 30-100: 40, mixing the enamel dry powder with purified water, adding the antibacterial material accounting for 0.5-1.5 percent of the enamel dry powder according to the weight ratio, stirring and ball-milling to prepare enamel glaze slurry containing the antibacterial material;
s3, coating the enamel glaze slurry containing the antibacterial material on the inner wall of the enamel liner by adopting an enamel process, adjusting the adsorption quantity of the glaze slurry to 20-24 g, drying at the temperature of 120-150 ℃ for 25-40 min, and then sintering at the high temperature of 830-870 ℃ for 8-12 min to form the antibacterial enamel liner coating, thereby obtaining the antibacterial enamel liner.
In the step S1, the titanium dioxide with a particle size of 30-40 nm is selected because the light absorption band is blue-shifted due to the small size effect, quantum effect and induction effect of the nano titanium dioxide, so that the conventional material without absorption capacity in the ultraviolet band can be transformed by the nanocrystallization technology to generate a broad-band strong ultraviolet absorption power, and experiments prove that the nano titanium dioxide particles with a particle size of 30-40 nm have the characteristics of broadening and blue-shifting phenomena of the absorption of various wavelengths of light, and can be used as a material for broadening the wavelength of the absorbed light.
The metal material with antibacterial activity comprises a silver-containing compound and/or a copper-containing compound, specifically, the silver-containing compound is 0.5-3% of silver nitrate, and the copper-containing compound is 0.5-3% of copper nitrate. The doped metal material with antibacterial activity can prevent the recombination of electron-hole pairs and promote the effective separation of the electron-hole pairs, so that the antibacterial performance of titanium dioxide is more stable, wherein the antibacterial capability of silver in the metal is the strongest, and in order to reduce the cost of using the silver-containing compound, a copper-containing compound can be selected and used, or the copper-containing compound and the silver-containing compound can be mixed for use.
The ball milling time is 30min, the rotating speed is 200-350 r/min, titanium dioxide and the metal material with antibacterial activity can be fully mixed together after ball milling, and the antibacterial material is prepared after high-temperature calcination at 800-900 ℃.
In step S2, mixing the components in a weight ratio of 100: 30-100: 40, the pure water is required to be the pure water meeting the standard of industrial pure water, tap water is strictly forbidden to use so as to prevent the final antibacterial effect from being influenced, the antibacterial material accounting for 0.5-1.5 percent of the enamel dry powder is added according to the weight ratio, stirred for 240-360 min and ball-milled for 60-120 min, so that the antibacterial material is fully dispersed in the enamel glaze slurry prepared from the enamel dry powder and the pure water, and is statically aged for 360-480 min to discharge gas in the enamel glaze slurry and generate a certain degree of sedimentation, and at the moment, a surface layer solution can be removed, so that free substances are reduced, the flowing property of the enamel glaze slurry is more stable, the quality of an enamel surface can be improved, and the enamel glaze slurry can meet the requirements of enamel coating.
Step S3, the enamel process comprises one of a flow enamel process, a shake enamel process, a dip enamel process and a spray enamel process, the enamel process is adopted to coat enamel glaze slurry containing the antibacterial material on the inner wall of the enamel liner, the adsorption capacity of the glaze slurry is adjusted to 20-24 g, the larger the adsorption capacity is, the more the enamel glaze slurry is used, the thicker the prepared antibacterial enamel liner is, the volume of the antibacterial enamel liner is reduced, the waste of the material can be caused, if the adsorption capacity is too small, the substrate of the enamel liner can be exposed to cause corrosion, and the antibacterial effect can not be easily achieved; the antibacterial enamel liner coating is formed by coating the enamel glaze slurry containing the antibacterial material on the inner wall of the enamel liner, the thickness of the antibacterial enamel liner coating is 150-500 mu m, and the thickness of the preferred antibacterial enamel liner coating is 200-350 mu m, so that the thickness not only meets the covering capability and the antibacterial effect on the enamel liner base material, but also avoids the waste of materials; and then drying at the temperature of 120-150 ℃ for 25-40 min, removing free water in the enamel glaze slurry, and sintering at the high temperature of 830-870 ℃ for 8-12 min to obtain the anti-bacterial enamel liner which is not easy to fall off.
In the first embodiment, titanium dioxide and a metal material with antibacterial activity are fully mixed to prepare an antibacterial material, the doped metal material can prevent the recombination of titanium dioxide electron-hole pairs and promote the effective separation of the electron-hole pairs, so that the antibacterial performance of the titanium dioxide is more stable, the antibacterial material is added into a mixture of enamel dry powder and purified water to prepare enamel glaze slurry, the enamel glaze slurry is coated on the inner wall of an enamel inner container through an enamel process to form an antibacterial enamel inner container coating, so that the antibacterial enamel inner container is prepared, the metal material with antibacterial activity can be reduced into elemental metal (for example, silver ions or copper ions are reduced into metallic silver or copper) by utilizing photo-generated electrons generated by the titanium dioxide through ultraviolet illumination, and the antibacterial enamel inner container prepared by the preparation method is enabled to be under low illumination intensity (namely, the antibacterial effect generated by the titanium dioxide is weaker), the separated simple substance metal (such as metal silver or metal copper) can be utilized to realize the antibacterial effect, the sterilization rate to escherichia coli and staphylococcus aureus is more than 95%, and the requirement on the antibacterial effect is met.
The verification experiment shows that:
s1, mixing titanium dioxide with the particle size of 30-40 nm and 0.5% -3% of silver nitrate, carrying out ball milling for 30min, and then calcining at the temperature of 800-900 ℃ to obtain the antibacterial material;
s2, mixing the components in a weight ratio of 100: 30-100: 40, mixing the enamel dry powder with purified water, adding an antibacterial material, wherein the antibacterial material is added in a proportion of 0.5-1.5% by weight of the enamel dry powder, stirring for 240-360 min, ball-milling for 60-120 min, and then standing and aging for 360-480 min to prepare enamel glaze slurry with the antibacterial material;
s3, cutting and processing an enamel liner steel plate into an enamel test plate with the thickness of 50 x 50mm by adopting laser, spraying enamel glaze slurry with an antibacterial material on the test plate, controlling the adsorption quantity of the single-side sprayed glaze slurry to be 1-2 g, drying for 25-40 min at the temperature of 120-150 ℃, and then sintering for 8-12 min at the high temperature of 830-870 ℃ to manufacture the antibacterial enamel test plate;
antibacterial tests are carried out according to the GB 21551.2-2010 standard of special requirements of antibacterial materials with antibacterial, degerming and purifying functions of household and similar appliances, and the antibacterial rates of staphylococcus aureus and escherichia coli under natural light are over 98-99.9%; after the enamel test panel is subjected to a sunlight exposure experiment for 2000h and a boiled water resistant experiment for 400h, the antibacterial effect is kept unchanged.
Example two
At present, most of water heaters adopting ultraviolet lamps to carry out photocatalyst antibiosis on titanium dioxide need to provide a light source all the time in the sterilization process, need high illumination intensity in order to meet the requirement of antibiosis effect, but this can increase the power consumption of users, and in order to solve the above problems, the application provides a corresponding scheme, please refer to fig. 2-3, which specifically is:
on the basis of the method of the first embodiment, the antibacterial enamel liner comprises an upper end enclosure assembly 1, a lower end enclosure assembly 2, a liner middle section 3 and an antibacterial enamel liner coating 4, wherein an ultraviolet lamp 5 is arranged in the antibacterial enamel liner, the ultraviolet lamp 5 is connected with the upper end enclosure assembly 1, optionally, the ultraviolet lamp 5 can be arranged on the liner middle section 3 and the lower end enclosure 2 or is fixed on other parts in an auxiliary manner, an ultraviolet lamp cover is arranged on the outer side of the ultraviolet lamp 5, and the ultraviolet lamp 5 is isolated from water in the antibacterial enamel liner; the method comprises the steps that a driving device is arranged in an antibacterial enamel liner and connected with an ultraviolet lamp, the driving power of the driving device comprises a high-power mode and a low-power mode and is used for controlling the power of the ultraviolet lamp, in the high-power mode, the power of the ultraviolet lamp is 40W-50W (in the prior art, the surface area of the liner of the water heater is about 2.5 square meters, the power of the ultraviolet lamp is 40W-50W, and the requirement of antibiosis can be met), in the low-power mode, the power of the ultraviolet lamp is 4W, and the wavelength of ultraviolet light waves is 200-385 mm.
In the embodiment of the application, the ultraviolet lamp is used for carrying out photocatalyst antibacterial water heater on titanium dioxide, and a light source is required to be provided all the time in the sterilization process, when the ultraviolet lamp in a high-power mode is used for sterilization, the power consumption of a user is large, energy conservation is not facilitated, and in the low-power mode provided by the application, a metal material with antibacterial activity can be reduced into a simple substance metal by using photo-generated electrons generated by ultraviolet illumination of the titanium dioxide in the antibacterial enamel liner coating, so that the antibacterial enamel liner prepared by the preparation method can also utilize the separated simple substance metal (such as metal silver or metal copper) to realize the antibacterial effect under the energy-saving low illumination intensity, the sterilization rate of the antibacterial enamel liner to escherichia coli and staphylococcus aureus is over 95%, and the requirement on the antibacterial effect is also met on the basis of energy conservation.
EXAMPLE III
In order to better coat the enamel glaze slurry containing the antibacterial material on the inner wall of the inner container, so that the antibacterial enamel inner container coating is not easy to fall off, the application provides a corresponding scheme, which specifically comprises the following steps:
on the basis of the method of the first embodiment, the preparation of the enamel liner mainly comprises the following steps: welding and forming the water heater liner, then carrying out sand blasting treatment on the water heater liner to remove oxide skin and impurities on the inner side surface of the water heater liner, so that a large number of micro pits are formed on the surface of the water heater liner, and the micro surface area is increased, thereby improving the adhesion strength of the antibacterial enamel liner coating, specifically, the sand blasting roughness is that Rz is more than 25 mu m, Ra is more than 3 mu m, and the cleanliness is more than or equal to Sa2.5.
In the embodiment of the application, the water heater liner formed by welding is subjected to sand blasting treatment, so that the sand blasting roughness is more than 25 microns, Ra is more than 3 microns, and the cleanliness is more than or equal to Sa2.5, and the enamel glaze slurry containing the antibacterial material can be better coated on the inner wall of the water heater liner, so that the coating of the antibacterial enamel liner is not easy to fall off, and the service life of the antibacterial enamel liner is prolonged.
Example four
The application also provides an antibacterial enamel liner which is prepared by adopting the preparation method of the antibacterial enamel liner.
The preparation method of the antibacterial enamel liner can refer to the above embodiments, and is not described herein again.
In the embodiment of the application, the antibacterial enamel liner prepared by the preparation method can save the cost of silver or reduce the energy consumption of the ultraviolet lamp on the premise of meeting the antibacterial requirement.
EXAMPLE five
The application also provides a water heater, the water heater includes foretell antibiotic enamel inner bag.
The antibacterial enamel liner can refer to the above embodiments, and details are not repeated here.
In this application embodiment, when long-term storage water and not using in the water heater inner bag, escherichia coli, staphylococcus aureus etc. of aquatic just can breed, because the water heater includes foretell antibiotic enamel inner bag, not only can utilize the photocatalyst catalysis of titanium dioxide to disinfect, can also utilize and make titanium dioxide reduce into simple substance metal with the metal material that has antibacterial activity through the photogenerated electron of ultraviolet illumination and disinfect, through dual antibiotic effect, can kill escherichia coli, staphylococcus aureus more than 95% in aquatic, still user a healthy quality of water.
Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. The preparation method of the antibacterial enamel liner is characterized by comprising the following steps:
(1) mixing titanium dioxide with a metal material with antibacterial activity, ball-milling, and calcining at 800-900 ℃ to obtain an antibacterial material;
(2) mixing the following components in percentage by weight of 100: 30-100: 40, mixing the enamel dry powder with purified water, adding the antibacterial material accounting for 0.5-1.5 percent of the enamel dry powder according to the weight ratio, stirring and ball-milling to prepare enamel glaze slurry containing the antibacterial material;
(3) and (2) coating the enamel glaze slip containing the antibacterial material on the inner wall of the enamel liner by adopting an enamel process, adjusting the adsorption capacity of the glaze slip to 20-24 g, drying at the temperature of 120-150 ℃ for 25-40 min, and then sintering at the high temperature of 830-870 ℃ for 8-12 min to form the antibacterial enamel liner coating, thereby preparing the antibacterial enamel liner.
2. The method for preparing the antibacterial enamel liner according to claim 1, wherein an ultraviolet lamp is arranged in the antibacterial enamel liner.
3. The method for preparing the antibacterial enamel liner according to claim 2, wherein a driving device is arranged in the antibacterial enamel liner, and the driving mode of the driving device comprises a high-power mode and a low-power mode and is used for controlling the power of the ultraviolet lamp.
4. The method for preparing antibacterial enamel liner according to claim 1,
the preparation method of the enamel liner comprises the following steps:
welding and forming the inner container of the water heater;
the liner is subjected to sand blasting treatment, so that the sand blasting roughness is greater than 25 μm, Ra is greater than 3 μm, and the cleanliness is greater than or equal to Sa2.5.
5. The method for preparing the antibacterial enamel liner according to claim 1, wherein the particle size of the titanium dioxide is 30-40 nm.
6. The method of claim 1, wherein the antimicrobial active metallic material comprises a silver-containing compound, and/or a copper-containing compound.
7. The method for preparing antibacterial enamel liner according to claim 6,
the silver-containing compound is 0.5-3% of silver nitrate, and the copper-containing compound is 0.5-3% of copper nitrate.
8. The method for preparing the antibacterial enamel liner according to claim 1, wherein the thickness of the antibacterial enamel liner coating is 200-350 μm.
9. An antibacterial enamel liner, characterized in that it is made by the method of any one of claims 1-8.
10. A water heater comprising the antimicrobial enamel liner of claim 9.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115504665A (en) * | 2022-10-21 | 2022-12-23 | 格力电器（武汉）有限公司 | Antibacterial agent for borosilicate glass and antibacterial enamel liner |
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