CN115707746A - Environment-friendly silver-loaded antibacterial wear-resistant nano coating for toilet and preparation method thereof - Google Patents
Environment-friendly silver-loaded antibacterial wear-resistant nano coating for toilet and preparation method thereof Download PDFInfo
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- CN115707746A CN115707746A CN202110948080.3A CN202110948080A CN115707746A CN 115707746 A CN115707746 A CN 115707746A CN 202110948080 A CN202110948080 A CN 202110948080A CN 115707746 A CN115707746 A CN 115707746A
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Abstract
The invention discloses an environment-friendly silver-loaded antibacterial wear-resistant nano coating for toilets and a preparation method thereof, and solves the technical problems that the existing antibacterial coating cannot be applied to the severe environment of the toilets and has certain toxicity hazards. The invention comprises the following components by weight percent: water (25-35%), water-based epoxy resin (20-25%), organic silicon resin (5-10%), chitosan (5-7%), silver-loaded nano zinc oxide (3-5%), fumed silica (1-3%), nano alumina (1-3%) and water-based epoxy curing agent (15-20%). The mildew-proof wear-resistant coating is simple in structure, scientific and reasonable in design and convenient to use, is suitable for spraying the surfaces of wall surfaces, ground surfaces and various internal facilities in the toilet environment, and has the effects of long-acting sterilization and mildew resistance, and the characteristics of wear resistance and easiness in cleaning; the paint is water paint, contains no toxic organic solvent, is environment friendly, and may be used in household and public toilet.
Description
Technical Field
The invention belongs to the technical field of antibacterial coatings, and particularly relates to an environment-friendly silver-loaded antibacterial wear-resistant nano coating for a toilet and a preparation method thereof.
Background
The toilet is an important part in daily life of human beings, and the safety and the sanitation of the toilet environment are ensured, so that the health and the quality of life of the human beings are necessarily improved. Generally, the toilet has poor ventilation effect and high humidity, and in addition, the excrement and urine discharge easily causes bacteria and virus breeding. In particular, in public toilets, people flow in large amount, the risk of cross contamination is increased, and great challenges are brought to the sanitation of toilets. Meanwhile, in such an environment, the wall surface, the ground surface and the surfaces of various internal facilities of the toilet are also very easy to be stained, rough, aged and cracked, and the attachment and breeding of bacteria and viruses are further aggravated, so that the difficulty of cleaning is increased and the cleaning cost is increased.
The problems of bacterial breeding in the toilet environment and old facilities are obviously improved by using the mildew-proof wear-resistant paint on the wall surface, the ground surface and the surfaces of various internal facilities of the toilet, the environmental sanitation of the toilet is improved, and the maintenance cost of the toilet is reduced. However, the antibacterial coating on the market is often not stable enough in performance and cannot be applied to the severe environment of a toilet, and meanwhile most coatings often contain toxic organic solvents and are dangerous to human health. Therefore, it is necessary to develop an environment-friendly antibacterial wear-resistant coating which can be applied to the toilet environment.
The invention provides an environment-friendly silver-loaded antibacterial wear-resistant nano coating for toilets and a preparation method thereof, and solves the technical problems that the existing antibacterial coating cannot be applied to the severe environment of the toilets and has certain toxicity hazards.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides an environment-friendly silver-loaded antibacterial wear-resistant nano coating for toilets and a preparation method thereof, and solves the prior technical problem.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the environment-friendly silver-loaded antibacterial wear-resistant nano coating for the toilet comprises the following components in percentage by mass:
further, the epoxy equivalent of the aqueous epoxy resin is 500 to 600g/mol.
Further, the organic silicon resin is one or more of polydimethylsiloxane, vinyl-substituted polydimethylsiloxane and phenyl-substituted polydimethylsiloxane.
Further, the molecular weight of chitosan is 250000 to 1000000.
Further, the particle size of the fumed silica is 7 to 40nm.
Furthermore, the grain diameter of the nano-alumina is 10-30 nm.
Further, the preparation method of the silver-loaded nano zinc oxide comprises the following steps:
step A, adding nano zinc oxide and polyvinylpyrrolidone into water, and dispersing by magnetic stirring to obtain uniformly dispersed dispersion liquid;
step B, adding a silver nitrate aqueous solution into the dispersion liquid obtained in the step A, magnetically stirring at room temperature for 0.5-1 h, adding a newly prepared sodium borohydride aqueous solution, continuously reacting for 0.5-1 h, and reducing silver ions into nano silver;
and C, centrifugally drying the reaction liquid obtained in the step B to obtain the silver-loaded nano zinc oxide.
Furthermore, the grain diameter of the nano zinc oxide is 30-50 nm.
Furthermore, the ratio of the nano zinc oxide to the polyvinylpyrrolidone is 1.1-0.2, the ratio of the nano zinc oxide to the silver nitrate is 1.
The preparation method of the environment-friendly silver-loaded antibacterial wear-resistant nano coating for the toilet comprises the following steps:
step 1, mixing water, water-based epoxy resin, organic silicon resin, chitosan, silver-loaded nano zinc oxide, gas-phase method silicon dioxide and nano aluminum oxide according to the proportion, and uniformly stirring by using a high-speed dispersion machine to obtain a mixed solution;
and 2, uniformly mixing the mixed solution obtained in the step 1 with a water-based epoxy curing agent according to the proportion to obtain the environment-friendly silver-loaded antibacterial wear-resistant nano coating for the toilet.
Compared with the prior art, the invention has the following beneficial effects:
the invention has simple structure, scientific and reasonable design and convenient use, solves the technical problems that the existing antibacterial coating can not be applied to the severe environment of the toilet and has certain toxicity hazard, takes water-based epoxy resin and organic silicon resin as film-forming matrixes, takes chitosan and silver-loaded nano zinc oxide as bactericides, takes gas-phase silica and nano alumina as wear-resistant materials, and forms the antibacterial wear-resistant coating by adding a water-based epoxy curing agent under the condition of aqueous solution, thereby being applicable to the protective coatings on the wall surface, the ground surface and the surfaces of various internal facilities of the toilet and achieving the purposes of improving the environmental sanitation of the toilet and reducing the maintenance cost of the toilet.
The invention uses the water-based epoxy resin as a film forming matrix, does not use toxic organic solvent, and is safe and environment-friendly; and the epoxy resin has strong adhesive capacity to the matrix, and can effectively prevent the coating from falling off.
The added organic silicon resin has higher stability, lower surface energy, water resistance and moisture resistance, has an antifouling function and ensures that the surface of the paint is easy to clean.
According to the invention, the nano silver is loaded on the nano zinc oxide, so that on one hand, the agglomeration of the nano silver can be prevented, the bactericidal activity of the silver is improved, and the cost is reduced; on the other hand, due to the synergistic effect of the nano silver and the zinc oxide, the sterilization efficiency and the performance stability of the coating are further improved.
The chitosan added in the invention is used as a natural cationic cellulose biopolymer, has higher bacteriostatic activity on various bacteria, and can form a stable complex with metal oxide due to a large amount of amino and hydroxyl contained in a chitosan molecular chain, so that the chitosan can play a role in stabilizing silver-loaded nano zinc oxide, and can cooperate with the silver-loaded nano zinc oxide to play excellent antibacterial performance.
The invention uses the gas phase method silicon dioxide and the nanometer alumina as the wear-resistant material, the nanometer structure not only has good dispersion performance, but also can enhance the wear-resistant performance of the coating.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of protection of the present invention.
The environment-friendly silver-loaded antibacterial wear-resistant nano coating for the toilet and the preparation method thereof provided by the invention have the advantages that the structure is simple, the design is scientific and reasonable, the use is convenient, the technical problems that the existing antibacterial coating cannot be suitable for the severe environment of the toilet and has certain toxicity hazards are solved, the antibacterial wear-resistant coating is formed by taking water-based epoxy resin and organic silicon resin as film-forming matrixes, taking chitosan and silver-loaded nano zinc oxide as bactericides and taking gas-phase silica and nano aluminum oxide as wear-resistant materials and adding a water-based epoxy curing agent under the condition of an aqueous solution, and can be used for protective coatings on the surfaces of toilet walls, floors and various internal facilities, so that the aims of improving the environmental sanitation of the toilet and reducing the maintenance cost of the toilet are fulfilled.
The environment-friendly silver-loaded antibacterial wear-resistant nano coating for the toilet comprises water, water-based epoxy resin, organic silicon resin, chitosan, silver-loaded nano zinc oxide, fumed silica, nano aluminum oxide and a water-based epoxy curing agent, wherein the mass percentages of the components are as follows:
the invention takes the water-based epoxy resin as a film forming matrix, does not use toxic organic solvents, and is safe and environment-friendly; and the epoxy resin has strong adhesive capacity to the matrix, and can effectively prevent the coating from falling off. The epoxy equivalent of the waterborne epoxy resin is 500-600 g/mol.
The added organic silicon resin has higher stability, lower surface energy, water resistance and moisture resistance, has an antifouling function and ensures that the surface of the coating is easy to clean. The organic silicon resin is one or more of polydimethylsiloxane, vinyl-substituted polydimethylsiloxane and phenyl-substituted polydimethylsiloxane.
The invention loads the nano silver on the nano zinc oxide, the metal silver has the strongest bactericidal ability in a plurality of bactericides, the recalcitrant bacterial strains can be effectively controlled, and a large amount of pathogenic organisms can be killed by a very small amount of silver. Zinc oxide itself is also an excellent inorganic antimicrobial agent. The silver-loaded nano zinc oxide can prevent the agglomeration of nano silver, improve the bactericidal activity of the silver and reduce the cost; on the other hand, due to the synergistic effect of the nano silver and the zinc oxide, the sterilization efficiency and the performance stability of the coating are further improved.
The chitosan added in the invention is used as a natural cationic cellulose biopolymer, has higher bacteriostatic activity on various bacteria, and can form a stable complex with metal oxide due to a large amount of amino and hydroxyl contained in a chitosan molecular chain, so that the chitosan has the function of stabilizing silver-loaded nano zinc oxide, and can be used for cooperating with the silver-loaded nano zinc oxide to play an excellent antibacterial property. The molecular weight of the chitosan is 250000-1000000.
The invention uses the gas phase method silicon dioxide and the nanometer alumina as the wear-resistant material, the nanometer structure not only has good dispersion performance, but also can enhance the wear-resistant performance and the corrosion-resistant performance of the coating. The grain diameter of the gas phase method silicon dioxide is 7-40 nm, and the grain diameter of the nano-alumina is 10-30 nm.
Example 1
The preparation method of the silver-loaded nano zinc oxide comprises the following steps:
step A, weighing 100 parts of nano zinc oxide (with the particle size of 30 nm) and 15 parts of polyvinylpyrrolidone into a beaker, adding a proper amount of water, and dispersing by magnetic stirring to obtain uniformly dispersed dispersion liquid;
step B, adding 4 parts of silver nitrate aqueous solution into the dispersion liquid obtained in the step A, magnetically stirring at room temperature for 0.5h, adding 5 parts of newly prepared sodium borohydride aqueous solution, continuing to react for 0.5h, and reducing silver ions into nano silver;
and step C, centrifuging the reaction liquid obtained in the step B at 3000rpm, and drying the obtained precipitate for 24 hours in vacuum at 60 ℃ to obtain the silver-loaded nano zinc oxide powder.
Example 2
The preparation method of the silver-loaded nano zinc oxide comprises the following steps:
step A, weighing 100 parts of nano zinc oxide (with the particle size of 50 nm) and 10 parts of polyvinylpyrrolidone into a beaker, adding a proper amount of water, and dispersing by magnetic stirring to obtain uniformly dispersed dispersion liquid;
step B, adding 2 parts of silver nitrate aqueous solution into the dispersion liquid obtained in the step A, magnetically stirring for 0.5h at room temperature, adding newly prepared 2.5 parts of sodium borohydride aqueous solution, continuously reacting for 0.5h, and reducing silver ions into nano silver;
and step C, centrifuging the reaction liquid obtained in the step B at 3000rpm, and drying the obtained precipitate for 24 hours in vacuum at 60 ℃ to obtain the silver-loaded nano zinc oxide powder.
Example 3
The preparation method of the environment-friendly silver-loaded antibacterial wear-resistant nano coating for the toilet comprises the following steps:
step 1, mixing 25 parts of water, 20 parts of water-based epoxy resin (with an epoxy equivalent of 600 g/mol), 5 parts of organic silicone resin, 5 parts of chitosan (with a molecular weight of 300000), 3 parts of silver-loaded nano zinc oxide prepared in example 1, 2 parts of fumed silica (with a particle size of about 10 nm) and 2 parts of nano alumina (with a particle size of about 20 nm), and uniformly stirring by using a high-speed dispersion machine;
and 2, uniformly mixing the mixed solution obtained in the step 1 with 15 parts of waterborne epoxy curing agent to obtain the environment-friendly silver-loaded antibacterial wear-resistant nano coating for the toilet.
Example 4
The preparation method of the environment-friendly silver-loaded antibacterial wear-resistant nano coating for the toilet comprises the following steps:
step 1, mixing 25 parts of water, 25 parts of water-based epoxy resin (the epoxy equivalent is 550 g/mol), 5 parts of organic silicone resin, 5 parts of chitosan (the molecular weight is 500000), 3 parts of silver-loaded nano zinc oxide prepared in example 2, 2 parts of fumed silica (the particle size is about 10 nm) and 2 parts of nano alumina (the particle size is about 20 nm), and uniformly stirring by using a high-speed dispersion machine;
and 2, uniformly mixing the mixed solution obtained in the step 1 with 20 parts of aqueous epoxy curing agent to obtain the environment-friendly silver-loaded antibacterial wear-resistant nano coating for the toilet.
Example 5
The preparation method of the environment-friendly silver-loaded antibacterial wear-resistant nano coating for the toilet comprises the following steps:
step 1, mixing 35 parts of water, 20 parts of aqueous epoxy resin (the epoxy equivalent is 550 g/mol), 6 parts of organic silicone resin, 7 parts of chitosan (the molecular weight is 800000), 3 parts of silver-loaded nano zinc oxide prepared in example 1, 1 part of fumed silica (the particle size is about 20 nm) and 3 parts of nano alumina (the particle size is about 20 nm), and uniformly stirring by a high-speed disperser;
and 2, uniformly mixing the mixed solution obtained in the step 1 with 15 parts of waterborne epoxy curing agent to obtain the environment-friendly silver-loaded antibacterial wear-resistant nano coating for the toilet.
Example 6
The preparation method of the environment-friendly silver-loaded antibacterial wear-resistant nano coating for the toilet comprises the following steps:
step 1, mixing 30 parts of water, 20 parts of water-based epoxy resin (with an epoxy equivalent of 600 g/mol), 10 parts of silicone resin, 7 parts of chitosan (with a molecular weight of 800000), 5 parts of silver-loaded nano-zinc oxide prepared in example 2, 3 parts of fumed silica (with a particle size of about 20 nm) and 1 part of nano-alumina (with a particle size of about 20 nm), and stirring uniformly by a high-speed dispersion machine;
and 2, uniformly mixing the mixed solution obtained in the step 1 with 15 parts of waterborne epoxy curing agent to obtain the environment-friendly silver-loaded antibacterial wear-resistant nano coating for the toilet.
Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, but not to limit the technical solutions, and certainly not to limit the scope of the present invention; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention; that is, the technical problems to be solved by the present invention are still consistent with the present invention, and all the modifications or changes made without substantial meaning in the spirit and scope of the present invention should be included in the protection scope of the present invention; in addition, the technical scheme of the invention is directly or indirectly applied to other related technical fields, and the same principle is included in the patent protection scope of the invention.
Claims (10)
1. The environment-friendly silver-loaded antibacterial wear-resistant nano coating for the toilet is characterized by comprising the following components in percentage by mass:
2. the environment-friendly silver-loaded antibacterial wear-resistant nano-coating for toilets according to claim 1, wherein the epoxy equivalent of the water-based epoxy resin is 500-600 g/mol.
3. The environment-friendly silver-loaded antibacterial wear-resistant nano-coating for toilets according to claim 1, wherein the organic silicon resin is one or more of polydimethylsiloxane, vinyl-substituted polydimethylsiloxane and phenyl-substituted polydimethylsiloxane.
4. The environment-friendly silver-loaded antibacterial wear-resistant nano coating for toilets according to claim 1, wherein the molecular weight of chitosan is 250000-1000000.
5. The environment-friendly silver-loaded antibacterial wear-resistant nano coating for toilets according to claim 1, wherein the particle size of the fumed silica is 7-40 nm.
6. The environment-friendly silver-loaded antibacterial wear-resistant nano-coating for the toilets according to claim 1, wherein the particle size of the nano-alumina is 10-30 nm.
7. The environment-friendly silver-loaded antibacterial wear-resistant nano coating for toilets according to claim 1, wherein the preparation method of the silver-loaded nano zinc oxide comprises the following steps:
step A, adding nano zinc oxide and polyvinylpyrrolidone into water, and dispersing by magnetic stirring to obtain uniformly dispersed dispersion liquid;
step B, adding a silver nitrate aqueous solution into the dispersion liquid obtained in the step A, magnetically stirring at room temperature for 0.5-1 h, adding a newly prepared sodium borohydride aqueous solution, continuously reacting for 0.5-1 h, and reducing silver ions into nano silver;
and C, centrifugally drying the reaction liquid obtained in the step B to obtain the silver-loaded nano zinc oxide.
8. The environment-friendly silver-loaded antibacterial wear-resistant nano coating for toilets according to claim 7, wherein the particle size of nano zinc oxide is 30-50 nm.
9. The environment-friendly silver-loaded antibacterial wear-resistant nano coating for toilets according to claim 7, wherein the ratio of nano zinc oxide to polyvinylpyrrolidone is 1: 0.1-0.2, the ratio of nano zinc oxide to silver nitrate is 1: 0.02-0.05, and the ratio of sodium borohydride to silver nitrate is 1-1.5.
10. The preparation method of the environment-friendly silver-loaded antibacterial wear-resistant nano coating for the toilets according to any one of claims 1 to 9, which is characterized by comprising the following steps:
step 1, mixing water, water-based epoxy resin, organic silicon resin, chitosan, silver-loaded nano zinc oxide, fumed silica and nano aluminum oxide according to the proportion of claim 1, and uniformly stirring by using a high-speed dispersion machine to obtain a mixed solution;
and 2, uniformly mixing the mixed solution obtained in the step 1 with a water-based epoxy curing agent according to the proportion of claim 1 to obtain the environment-friendly silver-loaded antibacterial wear-resistant nano coating for the toilet.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109486339A (en) * | 2017-09-11 | 2019-03-19 | 中国科学院金属研究所 | A kind of wear-resistant and corrosion-resistant paint and the preparation method and application thereof |
| CN111454625A (en) * | 2020-03-13 | 2020-07-28 | 福清市景士兰涂料有限公司 | Wear-resistant antifouling water-based paint and preparation method thereof |
| CN113121904A (en) * | 2021-04-22 | 2021-07-16 | 青岛华泓星塑胶有限公司 | Preparation process of antibacterial film |
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- 2021-08-18 CN CN202110948080.3A patent/CN115707746A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109486339A (en) * | 2017-09-11 | 2019-03-19 | 中国科学院金属研究所 | A kind of wear-resistant and corrosion-resistant paint and the preparation method and application thereof |
| CN111454625A (en) * | 2020-03-13 | 2020-07-28 | 福清市景士兰涂料有限公司 | Wear-resistant antifouling water-based paint and preparation method thereof |
| CN113121904A (en) * | 2021-04-22 | 2021-07-16 | 青岛华泓星塑胶有限公司 | Preparation process of antibacterial film |
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