CN114277420A - Aluminum substrate with sterilization and antibiosis functions and preparation method thereof - Google Patents
Aluminum substrate with sterilization and antibiosis functions and preparation method thereof Download PDFInfo
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- CN114277420A CN114277420A CN202111576468.1A CN202111576468A CN114277420A CN 114277420 A CN114277420 A CN 114277420A CN 202111576468 A CN202111576468 A CN 202111576468A CN 114277420 A CN114277420 A CN 114277420A
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Abstract
The invention provides an aluminum substrate with sterilization and antibiosis functions and a preparation method thereof, wherein the surface of the aluminum substrate is treated, and then a sterilization and antibiosis mixture is attached to the surface of the aluminum substrate through photooxidation sealing treatment and photocatalytic curing treatment, so that the sterilization and antibiosis mixture can activate TIO2 ions under the action of ultraviolet rays and produce free radicals with high catalytic activity, can generate strong photooxidation and reduction capability, can be attached to the surface of an object through catalysis and photolysis, and has high-efficiency sterilization and antibiosis functions.
Description
Technical Field
The invention relates to the technical field of aluminum substrates, in particular to an aluminum substrate with sterilization and antibiosis functions and a preparation method thereof.
Background
In recent years, with the development of economic society and the progress of scientific technology, antibacterial performance has become the main subject of a new era. In the aerospace field, the medical and health field or the food industry, the antibacterial metal material plays an important role in prolonging the service life of the material, improving the sanitation and safety performance of the material and the like. Aluminum and aluminum alloy are one of the most widely used materials in nonferrous metals, and the aluminum alloy has a plurality of excellent properties such as low density, easy processing, low thermal expansion coefficient, high thermal conductivity, high specific stiffness and specific strength, and the like. The method is widely applied to daily production and life, and the fields of aviation, automobiles, high-speed rails, engine pistons, optical instruments, missile mosaic structures and the like. With the intensive research on the aluminum alloy materials, the existing aluminum alloy materials are more in variety, the performances of various aluminum alloy materials are greatly different, the antibacterial performance of the existing aluminum alloy materials is particularly remarkable, and bacteria are easy to breed in the using process.
Disclosure of Invention
In view of the above, the technical problem to be solved by the present invention is to provide an aluminum substrate with bactericidal and antibacterial functions and a preparation method thereof, which has a reasonable design and strong adhesion and has efficient bactericidal and antibacterial effects.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, a method for preparing an aluminum substrate with bactericidal and antibacterial functions is provided, which comprises the following steps:
step S1 surface pretreatment of aluminum substrate: washing and soaking the aluminum substrate with a cleaning agent, an acetone solution and clear water in sequence to remove dirt and oil stains on the surface of the aluminum substrate, and air-drying the aluminum substrate by using a blower to obtain the aluminum substrate with a clean surface;
step S2 electrolytic anodization: placing the aluminum substrate cleaned in the step S1 in an anodic oxidation reaction tank for immersion cleaning, wherein sulfuric acid electrolyte in the anodic oxidation reaction tank reacts with the aluminum substrate to form a sulfuric acid oxide film on the surface of the aluminum substrate;
step S3 photo-oxidation sealing process: taking the aluminum substrate with the sulfuric acid oxide film formed in the step S2, pumping the sterilizing and antibacterial mixture to a photo-oxidation sealing device by adopting a pneumatic pump device, and uniformly spraying the sterilizing and antibacterial mixture on the surface of the aluminum substrate to form a sterilizing and antibacterial layer, so as to obtain the aluminum substrate with the sterilizing and antibacterial layer;
step S4 photocatalytic curing process: taking the aluminum substrate with the sterilization and antibiosis layer in the step S3, and carrying out photocatalytic curing by adopting a UV ultraviolet lamp to form an effective sterilization and antibiosis layer with the thickness of 2-2.5um on the surface of the aluminum substrate;
step S5 aluminum substrate cutting: and (5) cutting the aluminum substrate with the effective sterilization and antibiosis layer formed in the step (S4) according to the size requirement to obtain the aluminum substrate with sterilization and antibiosis functions.
Preferably, the bactericidal and antibacterial mixture in step S3 is prepared by mixing the following materials: 100-120 parts of epoxy resin, 10-20 parts of environment-friendly diluent and 3-5 parts of nano TiO2 ions.
Preferably, the photooxidation sealing device in step S3 is uniformly spread on the surface of the aluminum substrate by using a 120-mesh roller at a speed of 8-12 m/min.
Preferably, the bactericidal and antibacterial mixture is prepared by putting 100-120 parts of epoxy resin, 10-20 parts of environment-friendly diluent and 3-5 parts of nano TiO2 ions into a reaction vessel for stirring and mixing, wherein the stirring speed is 1000-1200r/min, and the stirring time is 10-15 min.
Preferably, in the step S4, the UV lamp is controlled to have a power of 22kw and an energy of 600mJ/cm2The irradiation time is 60-70S, and an effective sterilization and antibiosis layer with the thickness of 2-2.5um is formed on the surface of the aluminum substrate.
Preferably, the aluminum substrate is an aluminum coil.
On the other hand, the aluminum substrate with the sterilizing and antibacterial functions, which is prepared by adopting the preparation method of the aluminum substrate with the sterilizing and antibacterial functions, comprises an aluminum substrate matrix layer and a sterilizing and antibacterial layer attached to the surface of the aluminum substrate matrix layer.
Preferably, the surface of the aluminum substrate with the bactericidal and antibacterial functions is irregular concave mirror surface shape.
This application is through handling aluminum substrate surface, and the antibiotic mixture that will disinfect is attached to aluminum substrate surface through light oxidation sealing treatment and photocatalytic curing processing afterwards for its antibiotic mixture that disinfects can make TIO2 ion activation and produce the free radical that has high catalytic activity under the effect of ultraviolet ray, can produce very strong light oxidation and reducing power, can catalyze, photodissociation is attached to the object surface, and the efficient disinfects, the antibiotic effect.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
FIG. 1 is a flow chart of a method for manufacturing an aluminum substrate with bactericidal and antibacterial functions in the embodiment of the present application;
FIG. 2 is a schematic structural view of an aluminum substrate with bactericidal and antibacterial functions in the embodiment of the present application;
FIG. 3 is a top view of an aluminum substrate with bactericidal and antibacterial functions in an embodiment of the present application;
FIG. 4 is a photograph showing the results of a test on an aluminum substrate having a sterilizing and antibacterial function in the examples of the present application;
FIG. 5 is a photograph showing the results of a test on an aluminum substrate having a sterilizing and antibacterial function in the examples of the present application;
FIG. 6 is a photograph showing the result of detecting microorganisms on an aluminum substrate having a bactericidal and antibacterial function in the examples of the present application.
The numbers in fig. 2: 1 is an aluminum substrate layer and 2 is a sterilization and antibiosis layer.
Detailed Description
The following detailed description of the present application, taken in conjunction with the accompanying drawings and examples, is provided to enable the aspects of the present application and its advantages to be better understood. However, the specific embodiments and examples described below are for illustrative purposes only and are not limiting of the present application.
It is expressly intended that all such similar substitutes and modifications apparent to those skilled in the art are deemed to be included in the present application. While the methods and applications of this application have been described in terms of preferred embodiments, it will be apparent to those of ordinary skill in the art that variations and modifications in the methods and applications described herein, or appropriate variations and combinations thereof, may be made to implement and use the techniques of this application without departing from the content, spirit and scope of the application.
It is to be understood that portions of this specification (including the drawings) not described in detail are those skilled in the art.
The principles and features of this application are described below in conjunction with the drawings and the embodiments, which are set forth to illustrate the application and not to limit the scope of the application. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Referring to fig. 1, a method for preparing an aluminum substrate with bactericidal and antibacterial functions includes the following steps:
step S1 surface pretreatment of aluminum substrate: washing and soaking the aluminum substrate with a cleaning agent, an acetone solution and clear water in sequence to remove dirt and oil stains on the surface of the aluminum substrate, and air-drying the aluminum substrate by using a blower to obtain the aluminum substrate with a clean surface;
step S2 electrolytic anodization: placing the aluminum substrate cleaned in the step S1 in an anodic oxidation reaction tank for immersion cleaning, wherein sulfuric acid electrolyte in the anodic oxidation reaction tank reacts with the aluminum substrate to form a sulfuric acid oxide film on the surface of the aluminum substrate;
step S3 photo-oxidation sealing process: taking the aluminum substrate with the sulfuric acid oxide film formed in the step S2, pumping the sterilizing and antibacterial mixture to a photo-oxidation sealing device by adopting a pneumatic pump device, uniformly spraying the sterilizing and antibacterial mixture on the surface of the aluminum substrate by adopting a 120-mesh roller at the speed of 8-12m/min, and uniformly spraying the sterilizing and antibacterial mixture on the surface of the aluminum substrate to form a sterilizing and antibacterial layer 2, thus obtaining the aluminum substrate with the sterilizing and antibacterial layer 2; specifically, the sterilizing and antibacterial mixture is prepared by putting 120 parts of epoxy resin 100-20 parts of environment-friendly diluent and 3-5 parts of nano TiO2 ions into a reaction container for stirring and mixing, wherein the stirring speed is 1000-1200r/min, the stirring time is 10-15min, the nano TiO2 ions have the antibacterial and antibacterial properties, and the nano TiO2 ions have the precious optical properties and the secret chemical stability, thermal stability and photocatalytic catalyst reflection original amount;
step S4 photocatalytic curing process: taking the aluminum substrate with the sterilization and antibiosis layer 2 in the step S3, and carrying out photocatalytic curing by adopting a UV ultraviolet lamp to form an effective sterilization and antibiosis layer 2 with the thickness of 2-2.5um on the surface of the aluminum substrate; the specific UV ultraviolet lamp is controlled to have the power of 22kw and the energy of 600-2Irradiating for 60-70S to form an effective sterilization and antibiosis layer 2 with the thickness of 2-2.5um on the surface of the aluminum substrate;
step S5 aluminum substrate cutting: taking the aluminum substrate with the effective sterilization and antibiosis layer 2 formed in the step S4, cutting the aluminum substrate according to the size requirement, and obtaining the aluminum substrate with sterilization and antibiosis functions.
Referring to fig. 2 to 3, an aluminum substrate with bactericidal and antibacterial functions, which is manufactured by using the above-mentioned method for manufacturing an aluminum substrate with bactericidal and antibacterial functions, includes an aluminum substrate layer 1, and a bactericidal and antibacterial layer 2 attached to the surface of the aluminum substrate layer 1, and has no obvious reflection and scattering properties for ultraviolet light.
Specifically, the surface of the aluminum substrate with the sterilization and antibiosis functions is stamped into an irregular concave mirror surface shape to realize light source concentration multi-angle reflection, so that the photocatalytic catalyst reflection principle is realized aiming at sunshine or 360-degree dead angle-free emission of lighting light, high-efficiency catalysis operation is achieved, and high-efficiency sterilization and antibiosis are realized.
Under the action of ultraviolet rays in sunlight or lamplight, the nanometer Ti02 ions are activated to generate free radicals with high catalytic activity, so that the strong photooxidation and reduction capability can be generated, various organic matters and partial inorganic matters such as formaldehyde and the like attached to the surface of an object can be catalyzed and photolyzed, and various bacteria in the air can be effectively killed.
The following 3 examples are used to describe the preparation method of the nano-alumina antibacterial coating in detail:
example 1:
step S1 surface pretreatment of aluminum substrate: washing and soaking the aluminum substrate with a cleaning agent, an acetone solution and clear water in sequence to remove dirt and oil stains on the surface of the aluminum substrate, and air-drying the aluminum substrate by using a blower to obtain the aluminum substrate with a clean surface;
step S2 electrolytic anodization: placing the aluminum substrate cleaned in the step S1 in an anodic oxidation reaction tank for immersion cleaning, wherein sulfuric acid electrolyte in the anodic oxidation reaction tank reacts with the aluminum substrate to form a sulfuric acid oxide film on the surface of the aluminum substrate;
step S3 photo-oxidation sealing process: taking the aluminum substrate with the sulfuric acid oxide film formed in the step S2, putting 120 parts of epoxy resin, 20 parts of environment-friendly diluent and 5 parts of nano TiO2 ions into a reaction container, stirring and mixing at the stirring speed of 1200r/min for 15min, pumping the prepared sterilizing and antibacterial mixture into a photo-oxidation sealing device by adopting a pneumatic pump device, uniformly spraying the mixture on the surface of the aluminum substrate by adopting a 120-mesh roller at the speed of 12m/min to form a sterilizing and antibacterial layer 2, and obtaining the aluminum substrate with the sterilizing and antibacterial layer 2;
step S4 photocatalytic curing process: taking the aluminum substrate with the antibacterial layer 2 for sterilization in the step S3, controlling the power to 22kw and the energy to 750mJ/cm by using a UV lamp2The irradiation time is 70S, and the photocatalytic curing is carried out to form an effective sterilization and antibiosis layer 2 with the thickness of 2.5um on the surface of the aluminum substrate;
step S5 aluminum substrate cutting: taking the aluminum substrate with the effective sterilization and antibiosis layer 2 formed in the step S4, cutting the aluminum substrate according to the size requirement, and obtaining the aluminum substrate with sterilization and antibiosis functions.
Example 2:
step S1 surface pretreatment of aluminum substrate: washing and soaking the aluminum substrate with a cleaning agent, an acetone solution and clear water in sequence to remove dirt and oil stains on the surface of the aluminum substrate, and air-drying the aluminum substrate by using a blower to obtain the aluminum substrate with a clean surface;
step S2 electrolytic anodization: placing the aluminum substrate cleaned in the step S1 in an anodic oxidation reaction tank for immersion cleaning, wherein sulfuric acid electrolyte in the anodic oxidation reaction tank reacts with the aluminum substrate to form a sulfuric acid oxide film on the surface of the aluminum substrate;
step S3 photo-oxidation sealing process: taking the aluminum substrate with the sulfuric acid oxide film formed in the step S2, putting 105 parts of epoxy resin, 16 parts of environment-friendly diluent and 4 parts of nano TiO2 ions into a reaction container, stirring and mixing at the stirring speed of 1100r/min for 12min, pumping the prepared sterilizing and antibacterial mixture into a photooxidation sealing device by adopting a pneumatic pump device, uniformly spraying the mixture on the surface of the aluminum substrate by adopting a 120-mesh roller at the speed of 10m/min to form a sterilizing and antibacterial layer 2, and obtaining the aluminum substrate with the sterilizing and antibacterial layer 2;
step S4 photocatalytic curing process: taking the aluminum substrate with the sterilization and antibiosis layer 2 in the step S3, controlling the power to be 22kw and the energy to be 680mJ/cm by using a UV ultraviolet lamp2The irradiation time is 65S, and the photocatalytic curing is carried out to form an effective sterilization and antibiosis layer 2 with the thickness of 2.2um on the surface of the aluminum substrate;
step S5 aluminum substrate cutting: taking the aluminum substrate with the effective sterilization and antibiosis layer 2 formed in the step S4, cutting the aluminum substrate according to the size requirement, and obtaining the aluminum substrate with sterilization and antibiosis functions.
Example 3:
step S1 surface pretreatment of aluminum substrate: washing and soaking the aluminum substrate with a cleaning agent, an acetone solution and clear water in sequence to remove dirt and oil stains on the surface of the aluminum substrate, and air-drying the aluminum substrate by using a blower to obtain the aluminum substrate with a clean surface;
step S2 electrolytic anodization: placing the aluminum substrate cleaned in the step S1 in an anodic oxidation reaction tank for immersion cleaning, wherein sulfuric acid electrolyte in the anodic oxidation reaction tank reacts with the aluminum substrate to form a sulfuric acid oxide film on the surface of the aluminum substrate;
step S3 photo-oxidation sealing process: taking the aluminum substrate with the sulfuric acid oxide film formed in the step S2, putting 100 parts of epoxy resin, 10 parts of environment-friendly diluent and 3 parts of nano TiO2 ions into a reaction container, stirring and mixing at the stirring speed of 1000r/min for 10min, pumping the prepared sterilizing and antibacterial mixture into a photooxidation sealing device by adopting a pneumatic pump device, uniformly spraying the mixture on the surface of the aluminum substrate by adopting a 120-mesh roller at the speed of 8m/min to form a sterilizing and antibacterial layer 2, and obtaining the aluminum substrate with the sterilizing and antibacterial layer 2;
step S4 photocatalytic curing process: taking the aluminum substrate having the sterilization and antibacterial layer 2 in the step S3, and using a UV ultraviolet lamp to control the growth of bacteriaThe power is 22kw, the energy is 600mJ/cm2The irradiation time is 60S, and the photocatalytic curing is carried out to form an effective sterilization and antibiosis layer 2 with the thickness of 2um on the surface of the aluminum substrate;
step S5 aluminum substrate cutting: taking the aluminum substrate with the effective sterilization and antibiosis layer 2 formed in the step S4, cutting the aluminum substrate according to the size requirement, and obtaining the aluminum substrate with sterilization and antibiosis functions.
The aluminum substrates with bactericidal and antibacterial functions prepared in the above examples 1-3 were tested and counted, and the details are shown in Table 1 below.
Table 1:
as can be seen from table 1, the aluminum substrates with bactericidal and antibacterial functions prepared in examples 1 to 3 of the present application all have a certain bactericidal and antibacterial ability, and especially the antibacterial rate of example 1 is particularly significant, and the aluminum substrates with bactericidal and antibacterial functions prepared in example 1 are tested by the guangzhou division (SGS) of the national standards of standards technology service limited, which is shown in fig. 4 to 5, and the test results thereof meet the appearance of the metal materials and products for food contact (GB 4806.9-2016) according to the standard of the metal materials and products for food contact (GB 4806.9-2016); soaking liquid; three requirements of heavy metal migration quantity.
Referring to fig. 6, fig. 5 shows a case where the aluminum substrate with bactericidal and antibacterial functions prepared in example 1 is tested by a microbiological analysis and detection center in Guangdong province, and the test microorganism is escherichia coli: viable count (cfu/cm) directly obtained after inoculation of non-processed test piece2) Is 6.9 x 102Standing for 24h after inoculation of the non-processed sample piece to obtain viable count (cfu/cm)2) Is 2.5 x 105The number of viable bacteria (cfu/cm) obtained by leaving the antibacterial test piece for 24 hours after inoculation2) Is less than 0.62, the antibacterial activity value is more than 5.6, and the antibacterial rate is more than 99.9%.
Referring to fig. 5, fig. 5 shows a case where the aluminum substrate with bactericidal and antibacterial functions prepared in example 1 is tested by a microbiological analysis and detection center in Guangdong province, and the test microorganism is staphylococcus aureus: the viable count (cfu/cm 2) directly obtained after inoculation of the non-processed sample piece is 1.1 × 104, the viable count (cfu/cm 2) obtained after the inoculation of the non-processed sample piece is placed for 24 hours is 2.1 × 104, the viable count (cfu/cm 2) obtained after the inoculation of the antibacterial sample piece is less than 0.62, the antibacterial activity value is more than 4.5, and the antibacterial rate is more than 99.9%.
It is to be understood that the present application is described with respect to certain embodiments, and it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present application. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the application without departing from the essential scope thereof. Therefore, it is intended that the present application not be limited to the particular embodiments disclosed, but that the present application includes all embodiments falling within the scope of the appended claims.
Claims (8)
1. A preparation method of an aluminum substrate with sterilization and antibiosis functions is characterized by comprising the following steps:
step S1 surface pretreatment of aluminum substrate: washing and soaking the aluminum substrate with a cleaning agent, an acetone solution and clear water in sequence to remove dirt and oil stains on the surface of the aluminum substrate, and air-drying the aluminum substrate by using a blower to obtain the aluminum substrate with a clean surface;
step S2 electrolytic anodization: placing the aluminum substrate cleaned in the step S1 in an anodic oxidation reaction tank for immersion cleaning, wherein sulfuric acid electrolyte in the anodic oxidation reaction tank reacts with the aluminum substrate to form a sulfuric acid oxide film on the surface of the aluminum substrate;
step S3 photo-oxidation sealing process: taking the aluminum substrate with the sulfuric acid oxide film formed in the step S2, pumping the sterilizing and antibacterial mixture to a photo-oxidation sealing device by adopting a pneumatic pump device, and uniformly spraying the sterilizing and antibacterial mixture on the surface of the aluminum substrate to form a sterilizing and antibacterial layer, so as to obtain the aluminum substrate with the sterilizing and antibacterial layer;
step S4 photocatalytic curing process: taking the aluminum substrate with the sterilization and antibiosis layer in the step S3, and carrying out photocatalytic curing by adopting a UV ultraviolet lamp to form an effective sterilization and antibiosis layer with the thickness of 2-2.5um on the surface of the aluminum substrate;
step S5 aluminum substrate cutting: and (5) cutting the aluminum substrate with the effective sterilization and antibiosis layer formed in the step (S4) according to the size requirement to obtain the aluminum substrate with sterilization and antibiosis functions.
2. The method as claimed in claim 1, wherein the bactericidal and antibacterial mixture in step S3 is prepared by mixing the following materials: 100-120 parts of epoxy resin, 10-20 parts of environment-friendly diluent and 3-5 parts of nano TiO2 ions.
3. The method as claimed in claim 1, wherein the photo-oxidation sealing apparatus in step S3 is a 120 mesh roller, which is uniformly spread on the surface of the aluminum substrate at a speed of 8-12 m/min.
4. The method as claimed in claim 2, wherein the mixture is prepared by mixing 100-120 parts of epoxy resin, 10-20 parts of environmentally friendly diluent, and 3-5 parts of nano TiO2 ions in a reaction vessel at a stirring rate of 1000-1200r/min for 10-15 min.
5. The method as claimed in claim 1, wherein in step S4, the UV lamp is controlled to have a power of 22kw, an energy of 600mJ/cm 2, and an irradiation time of 60-70S, so as to form an effective antibacterial layer with a thickness of 2-2.5 μm on the surface of the aluminum substrate.
6. The method as claimed in claim 1, wherein the aluminum substrate is an aluminum coil.
7. The aluminum substrate with the bactericidal and antibacterial functions, which is prepared by the preparation method of the aluminum substrate with the bactericidal and antibacterial functions as claimed in claims 1 to 6, is characterized by comprising an aluminum substrate layer and a bactericidal and antibacterial layer attached to the surface of the aluminum substrate layer.
8. The aluminum substrate with bactericidal and antibacterial functions as claimed in claim 7, wherein the surface of the aluminum substrate with bactericidal and antibacterial functions is irregular concave mirror surface.
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