CN113045922A - Antibacterial coating, preparation method and application thereof - Google Patents
Antibacterial coating, preparation method and application thereof Download PDFInfo
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- CN113045922A CN113045922A CN202011561980.4A CN202011561980A CN113045922A CN 113045922 A CN113045922 A CN 113045922A CN 202011561980 A CN202011561980 A CN 202011561980A CN 113045922 A CN113045922 A CN 113045922A
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- nano
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
Abstract
The invention provides an antibacterial coating which is coated on the surface of a substrate and comprises a silica sol matrix and an inorganic antibacterial agent, wherein the inorganic antibacterial agent consists of nano silver particles, nano zinc oxide, nano copper and nano titanium dioxide, and is embedded in a network structure of the silica sol matrix.
Description
Technical Field
The invention relates to the field of coatings, in particular to an antibacterial coating, a preparation method and application thereof.
Background
At present, with the development of science and technology and the improvement of living standard of people, people's environmental awareness is continuously strengthened, and simultaneously, the disease incidence is also gradually increased because the environment deterioration and the global warming promote the breeding of bacteria and the infection of infectious diseases.
The antibacterial and antiviral glass and the antibacterial and antiviral ceramic are novel ecological functional materials, have important significance for improving ecological environment, keeping human health and guiding the research and development of related functional glass materials and ceramic materials, have stronger operability when coating materials containing antibacterial agents are coated on the glass and the ceramic to form antibacterial coatings, and are conventional methods for manufacturing the antibacterial and antiviral glass and the antibacterial and antiviral ceramic at present.
Currently, antibacterial agents applied to glass and ceramics include organic antibacterial agents and inorganic antibacterial agents, and when antibacterial treatment is performed using a coating material including an organic antibacterial agent, the coating layer has poor weather resistance and abrasion resistance, and has a short service life
When the inorganic antibacterial agent is used for antibacterial treatment, high-temperature treatment is needed, the treatment temperature is higher than 450 ℃, when the antibacterial agent contains silver, the high-temperature treatment can cause silver to be oxidized and discolored, and the antibacterial property of glass or ceramic is influenced.
Disclosure of Invention
The main object of the present invention is to provide an antimicrobial coating to solve the drawbacks of the prior art.
In order to achieve the above purpose, the present invention provides an antibacterial coating, which is characterized in that the antibacterial coating is coated on the surface of a substrate, the antibacterial coating comprises a silica sol matrix and an inorganic antibacterial agent, the inorganic antibacterial agent is composed of nano silver particles, nano zinc oxide, nano copper and nano titanium dioxide, and the inorganic antibacterial agent is embedded in a network structure of the silica sol matrix.
Preferably, the mass fraction of the silica sol is 2-20%, the mass fraction of the nano silver particles is 0.1-1%, the mass fraction of the nano zinc oxide is 0.1-1%, and the mass fraction of the nano titanium dioxide is 0.1-5%.
Preferably, the composition further comprises the following components in percentage by mass: 1-3% of PVP surface active agent, 0.5-1% of coupling agent, 0.1-0.5% of antioxidant and 0.1-0.5% of dispersing agent.
Preferably, the water-soluble organic solvent also comprises 80-95% of alcohol solvents in mass fraction.
Preferably, the alcohol solvent comprises one or a combination of three of absolute ethyl alcohol, isopropanol and ethylene glycol.
Preferably, the nano silver particles have a particle size of 5 to 60 nm.
Preferably, the particle size of the nano titanium dioxide is 5-100 nm.
Preferably, the particle size of the nano copper is 5-100 nm.
The invention also provides a preparation method of the antibacterial coating, which is applied to the preparation of the antibacterial coating and comprises the following steps:
s10: adding a certain amount of silica sol, nano titanium dioxide, nano silver particle dispersion liquid, nano copper dispersion liquid, a coupling agent, a PVP surfactant and a part of dispersing agent into a reaction kettle, controlling the temperature at 25 ℃, and stirring for a certain time;
s20: and cooling to 20 ℃, adding an alcohol solvent and the remaining dispersant, and performing ultrasonic dispersion for a certain time to obtain the antibacterial coating.
The invention also discloses application of the antibacterial coating, and the antibacterial coating contains the components in the antibacterial coating.
Compared with the prior art, the invention has the beneficial effects that:
(1) the silica sol is adopted as a matrix, so that low-temperature rapid curing is realized, and the curing is realized within 20 minutes at the curing temperature of 200 ℃, so that the antibacterial transparent coating is obtained;
(2) four inorganic antibacterial agents of nano silver particle particles, nano zinc oxide, nano copper and nano titanium dioxide are adopted, so that the composite antibacterial property is better;
(3) the coating can avoid silver oxidation, silver exists in the form of nano simple substance silver, blackening of the coating is avoided, transparency of the coating is guaranteed, convenience of construction is guaranteed, meanwhile, the antibacterial layer is ageing-resistant and high-temperature-resistant, a synchronous toughening process can be guaranteed, and the coating has good wear resistance.
(4) The antibacterial coating obtained by the invention can be applied to preparing antibacterial and antiviral glass and antibacterial and antiviral ceramics.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic illustration of a substrate coated with an antimicrobial coating in an embodiment of the present invention;
fig. 2 is a schematic view of a part of a network structure formed after the antibacterial coating provided by the embodiment of the invention is calcined.
The reference numbers illustrate:
1: a substrate; 2: a silica sol matrix; 3: nano silver particles; 4: nano-copper; 5: nano titanium dioxide; 6: and (3) nano zinc oxide.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The present invention is further illustrated by the following specific examples, but it should be noted that the specific material ratios, process conditions, results, etc. described in the examples of the present invention are only for illustrating the present invention and are not to be construed as limiting the scope of the present invention, and all equivalent changes and modifications according to the spirit of the present invention should be covered by the scope of the present invention.
Example 1:
in the embodiment of the invention, referring to fig. 1 and 2, an antibacterial coating is coated on the surface of a substrate 1, the substrate 1 comprises one or a combination of glass and ceramic, the antibacterial coating comprises a 5% by mass silica sol matrix 2 and an inorganic antibacterial agent, the inorganic antibacterial agent comprises 0.3% by mass of nano silver particles 3, 0.3% by mass of nano zinc oxide 6, 0.3% by mass of nano copper 4 and 1% by mass of nano titanium dioxide 5, the nano silver particles 3 have a particle size of 5-10nm, the nano titanium dioxide 5 has a particle size of 6-10nm, the nano copper 4 has a particle size of 10-15nm, the zinc oxide 6 has a particle size of 5-10nm, and the inorganic antibacterial agent is embedded in a network structure of the silica sol matrix 2.
In addition, in order to prevent agglomeration of the inorganic antibacterial agent when the inorganic antibacterial agent is added, enhance the wettability of the inorganic antibacterial agent and the silica sol, increase the stability of the antibacterial coating, and improve the microstructure and rheological property of the silica sol, the antibacterial coating further comprises 2% by mass of a PVP surfactant, 0.5% by mass of a coupling agent, 0.1% by mass of an antioxidant, and 0.5% by mass of a dispersing agent, and in order to increase the coatability of the antibacterial coating and the dissolution of the antioxidant, an alcohol solvent is selected, and in the embodiment of the invention, the alcohol substance is absolute ethyl alcohol with 90% by mass.
Example 2:
in the embodiments of the present invention, referring to fig. 1 and 2, an antibacterial coating is applied to the surface of a substrate 1, the substrate 1 comprises one or the combination of glass and ceramics, the antibacterial coating comprises a silica sol matrix 2 with the mass fraction of 10 percent and an inorganic antibacterial agent, the inorganic antibacterial agent consists of nano silver particles 3 with the mass fraction of 0.8%, nano zinc oxide 6 with the mass fraction of 0.6%, nano copper 4 with the mass fraction of 0.5% and nano titanium dioxide 5 with the mass fraction of 5%, the grain diameter of the nano silver particles 3 is 50-55nm, the grain diameter of the nano titanium dioxide 5 is 80-86nm, the particle size of the nano copper 4 is 80-90nm, the particle size of the zinc oxide 6 is 90-98nm, and the inorganic antibacterial agent is embedded in the network structure of the silica sol matrix 2.
In addition, in order to prevent agglomeration of the inorganic antibacterial agent when the inorganic antibacterial agent is added, enhance the wettability of the inorganic antibacterial agent and the silica sol, increase the stability of the antibacterial coating, and improve the microstructure and the rheological property of the silica sol, the antibacterial coating further comprises 1.2% by mass of PVP surfactant, 0.9% by mass of coupling agent, 0.5% by mass of antioxidant and 0.5% by mass of dispersing agent, and an alcohol solvent is selected in order to increase the coatability of the antibacterial coating and the dissolution of the antioxidant, and in the embodiment of the invention, the alcohol substance is absolute ethyl alcohol with 80% by mass.
Example 3
In the embodiments of the present invention, referring to fig. 1 and 2, an antibacterial coating is applied to the surface of a substrate 1, the substrate 1 comprises one or the combination of glass and ceramics, the antibacterial coating comprises 12.5 percent of silica sol matrix 2 and inorganic antibacterial agent by mass, the inorganic antibacterial agent consists of 0.5 percent of nano silver particles 3, 1 percent of nano zinc oxide 6, 0.7 percent of nano copper 4 and 0.1 percent of nano titanium dioxide 5, the grain diameter of the nano silver particles 3 is 32-40nm, the grain diameter of the nano titanium dioxide 5 is 50-58nm, the particle size of the nano copper 4 is 55-60nm, the particle size of the zinc oxide 6 is 40-50nm, and the inorganic antibacterial agent is embedded in the network structure of the silica sol matrix 2.
In addition, in order to prevent agglomeration of the inorganic antibacterial agent when the inorganic antibacterial agent is added, enhance the wettability of the inorganic antibacterial agent and the silica sol, increase the stability of the antibacterial coating, and improve the microstructure and rheological property of the silica sol, the antibacterial coating further comprises 2.8% by mass of a PVP surfactant, 0.6% by mass of a coupling agent, 0.3% by mass of an antioxidant, and 0.5% by mass of a dispersing agent, and an alcohol solvent is selected in order to increase the coatability of the antibacterial coating and the dissolution of the antioxidant, and in the embodiment of the invention, the alcohol substance is absolute ethyl alcohol with a mass fraction of 81%.
Comparative example 1 (reference example 1):
an antibacterial coating comprises the following components in percentage by mass:
5% of silica sol;
1.9% of nano silver particles;
2% of PVP surface active agent;
0.5% of a coupling agent;
0.1% of antioxidant;
0.5 percent of dispersant
90% of absolute ethyl alcohol;
the particle size of the nano silver particles is 5-10nm, the particle size of the nano titanium dioxide is 6-10nm, the particle size of the nano copper is 10-15nm, and the particle size of the zinc oxide is 5-10 nm.
Comparative example 2 (reference example 1):
an antibacterial coating comprises the following components in percentage by mass:
5% of silica sol;
0.3% of nano silver particles;
1.5% of PVP surface active agent;
0.5% of a coupling agent;
0.1% of antioxidant;
0.6 percent of dispersant
92% of absolute ethyl alcohol;
the particle size of the nano silver particles is 5-10nm, the particle size of the nano titanium dioxide is 6-10nm, the particle size of the nano copper is 10-15nm, and the particle size of the zinc oxide is 5-10 nm.
Comparative example 3 (reference example 2):
an antibacterial coating comprises the following components in percentage by mass:
10% of silica sol;
0.9% of nano silver particles;
1.2% of PVP surface active agent;
0.9% of a coupling agent;
0.5% of antioxidant;
0.5 percent of dispersant;
0.7 percent of nano zinc oxide;
4.3 percent of nano titanium dioxide;
isopropanol 81%;
the particle size of the nano silver particles is 50-55nm, the particle size of the nano titanium dioxide is 80-86nm, the particle size of the nano copper is 80-90nm, and the particle size of the zinc oxide is 90-98 nm.
Comparative example 4 (reference example 3):
an antibacterial coating comprises the following components in percentage by mass:
13% of silica sol;
0.6 percent of nano silver particles;
2.8% of PVP surface active agent;
0.6 percent of coupling agent;
0.3 percent of antioxidant;
0.7 percent of dispersant;
1% of nano copper;
81% of absolute ethyl alcohol;
the particle size of the nano silver particles is 32-40nm, the particle size of the nano titanium dioxide is 50-58nm, the particle size of the nano copper is 55-60nm, and the particle size of the zinc oxide is 40-50 nm.
The above examples and comparative examples were tested for performance by the following method:
(1) transparency: direct visual inspection;
(2) and (3) wear resistance test: 500g load, 10mmx10mm zero steel wool reciprocating friction;
(3) and (3) antibacterial property test: JIS Z2801-2010;
(4) and (3) testing the antiviral property: ISO 21702-.
And (3) testing results:
from the test results of the above examples and comparative examples, it can be seen that a higher concentration is required for achieving a better antibacterial and antiviral effect by simply adopting silver for antibacterial, but when the silver content is increased, the antibacterial and antiviral coating becomes yellow, and the antibacterial and antiviral effect by simply adopting silver as an antibacterial agent is limited, and when any one of the antibacterial agents is absent, a good antibacterial effect cannot be achieved, the four inorganic antibacterial agents have a synergistic effect, so that the antibacterial property can be enhanced, and meanwhile, the use amount of silver can be reduced by adopting a plurality of inorganic antibacterial agents in a mixed manner, so that the antibacterial performance requirement is met, the use cost can be reduced, and the popularization and application are facilitated.
In addition, the invention adopts silica sol as a base material, the silica sol carries out polymerization reaction in the process of water loss to form a network structure, the PVP surfactant, the coupling agent and the dispersing agent are used, the inorganic antibacterial agent comprises nano silver particles, nano zinc oxide, nano copper and nano titanium dioxide which are distributed in the network structure formed by polymerization of the silica sol, the network structure formed by polymerization of the silica sol can control the release and aggregation of the inorganic antibacterial agent, thereby ensuring the transparency and the antibacterial timeliness of the coating, meanwhile, the inorganic antibacterial agent is filled in the network structure of the silica sol to prevent the excessive volume shrinkage after polymerization of the silica sol and prevent the cracking of the coating from influencing the aesthetic property and the antibacterial effect of the product, in addition, the main antibacterial structures of the invention are polymers of the silica sol and inorganic antibacterial agents which are both inorganic substances, and have the advantages of high temperature resistance and good wear resistance, meanwhile, a large number of hydroxyl groups exist on the surface of the polymer of the silica sol, the hydroxyl groups can prevent the combination of oxygen and the silver simple substance and prevent the oxidation of the silver simple substance, and the antibacterial coating obtained by the invention can be cured within 20 minutes when being cured at 200 ℃.
The invention also provides a preparation method of the antibacterial coating, which is applied to the preparation of the antibacterial coating.
Example 4:
s10: adding a certain amount of silica sol, nano titanium dioxide, nano silver particle dispersion liquid, nano copper dispersion liquid, coupling agent, PVP surfactant and partial dispersant into a reaction kettle, controlling the temperature at 25 ℃, and stirring for 2 hours;
s20: and cooling to 20 ℃, adding an alcohol solvent and the rest dispersant, and performing ultrasonic dispersion for 45 minutes to obtain the required antibacterial coating, wherein the alcohol solvent comprises one or the combination of three of absolute ethyl alcohol, isopropanol and glycol.
In the above examples and comparative examples, the coupling agents were mainly silane coupling agents such as KH550, KH560 and KH792, the dispersing agents were inorganic dispersing agents such as water glass and sodium hexametaphosphate, and the antioxidant included one or a combination of two of the antioxidants 1010, KY-405.
The preparation method of the antibacterial coating provided by the invention is relatively simple, environment-friendly and pollution-free.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The antibacterial coating is characterized by being coated on the surface of a base material and comprising a silica sol matrix and an inorganic antibacterial agent, wherein the inorganic antibacterial agent is composed of nano silver particles, nano zinc oxide, nano copper and nano titanium dioxide, and is embedded in a network structure of the silica sol matrix.
2. The antibacterial coating of claim 1, wherein the mass fraction of the silica sol is 2-20%, the mass fraction of the nano silver particles is 0.1-1%, the mass fraction of the nano zinc oxide is 0.1-1%, and the mass fraction of the nano titanium dioxide is 0.1-5%.
3. The antibacterial coating according to claim 1, further comprising the following components in percentage by mass: 1-3% of PVP surface active agent, 0.5-1% of coupling agent, 0.1-0.5% of antioxidant and 0.1-0.5% of dispersing agent.
4. The antimicrobial coating of claim 1, further comprising 80-95% by mass of an alcohol solvent.
5. The antimicrobial coating of claim 4, wherein the alcoholic solvent comprises one or a combination of anhydrous ethanol, isopropyl alcohol, and ethylene glycol.
6. The antimicrobial coating of claim 1, wherein the nanosilver particles have a particle size of 5 to 60 nm.
7. The antimicrobial coating of claim 1, wherein said nano titanium dioxide has a particle size of 5-100 nm.
8. The antimicrobial coating of claim 1, wherein the nano-copper has a particle size of 5-100 nm.
9. A method for preparing an antimicrobial coating for use in preparing an antimicrobial coating according to any one of claims 1 to 8, comprising the steps of:
s10: adding a certain amount of silica sol, nano titanium dioxide, nano silver particle dispersion liquid, nano copper dispersion liquid, a coupling agent, a PVP surfactant and a part of dispersing agent into a reaction kettle, controlling the temperature at 25 ℃, and stirring for a certain time;
s20: and cooling to 20 ℃, adding an alcohol solvent and the remaining dispersant, and performing ultrasonic dispersion for a certain time to obtain the antibacterial coating.
10. Use of an antimicrobial coating, characterized in that the antimicrobial coating comprises the components of any of the preceding claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011561980.4A CN113045922A (en) | 2020-12-25 | 2020-12-25 | Antibacterial coating, preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011561980.4A CN113045922A (en) | 2020-12-25 | 2020-12-25 | Antibacterial coating, preparation method and application thereof |
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| CN113045922A true CN113045922A (en) | 2021-06-29 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113562984A (en) * | 2021-08-17 | 2021-10-29 | 长虹美菱股份有限公司 | Preparation method of touch display antibacterial layer of refrigerator glass |
| CN114590005A (en) * | 2022-02-17 | 2022-06-07 | 绍兴崇高新材料科技有限公司 | Antibacterial and antiviral waterproof preparation and application thereof in preparation of protective clothing fabric |
| CN115536889A (en) * | 2022-10-26 | 2022-12-30 | 常州山由帝杉防护材料制造有限公司 | Light-sensitive heterochromatic antibacterial film, preparation method and application |
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| CN113562984A (en) * | 2021-08-17 | 2021-10-29 | 长虹美菱股份有限公司 | Preparation method of touch display antibacterial layer of refrigerator glass |
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