Wear-resistant ceramic coating with high antibacterial property and preparation method thereof

Abstract

The application relates to the technical field of high-performance coating preparation, and discloses wear-resistant ceramic coating with high antibacterial property and a preparation method thereof, which comprises the following raw materials in parts by mass: modified silane 35-40 parts, silica sol 20-25 parts, film-forming aid 2-3 parts, CaO micro powder 4-5 parts, talc powder 5-6 parts, quartz powder 3-4 parts, antibacterial phase carrier powder 5-6 parts, copper ion source 1-3 parts, surfactant 0.6-0.8 parts, leveling agent 1-2 parts and deionized water; wherein the modified silane is a compounded grafting modified silane of gamma-glycidyl ether oxypropyl trimethoxysilane and gamma-aminopropyl triethoxysilane. Through the synergistic matching of low-cost inorganic components, the antibacterial and wear-resistant properties are improved, meanwhile, the preparation process is optimized, the preparation of the antibacterial agent and the preparation of the coating are integrated, the process is simplified, the utilization rate of raw materials is improved, and the performance, cost and production efficiency of the coating are considered.

Description

Technical Field

[0001] This invention relates to the field of high-performance coating preparation technology, specifically to a wear-resistant ceramic coating with high antibacterial properties and its preparation method. Background Technology

[0002] Ceramic coatings, due to their excellent scratch resistance, chemical corrosion resistance, and high-temperature resistance, are widely used in surface protection fields such as kitchen and bathroom fixtures, food processing equipment, public facilities, and household goods. With increasing demands for hygiene and safety, ceramic coatings that combine high antibacterial properties with high wear resistance have become an important direction for industry development, especially in food contact and public health scenarios, where higher requirements are placed on the long-lasting antibacterial effect and wear resistance stability of coatings.

[0003] Current antibacterial and wear-resistant ceramic coatings suffer from several technical shortcomings. On the one hand, some coatings use high-cost antibacterial and wear-resistant components such as nano-silver and graphene, resulting in high raw material costs and hindering large-scale industrial application. On the other hand, conventional low-cost coatings often use single antibacterial components or simple mixtures of wear-resistant fillers, making it difficult to achieve both antibacterial and wear-resistant properties simultaneously. For example, using a single Ca... 2+ Antibacterial components have low antibacterial rates, and single wear-resistant fillers such as talc and quartz powder are prone to uneven dispersion and weak bonding with film formation, resulting in rapid degradation of the coating's wear resistance.

[0004] In addition, some ceramic coatings have poor compatibility with inorganic antibacterial and wear-resistant fillers, which can easily lead to phase separation, coating blistering and peeling, and seriously reduce the stability of the coating in use.

[0005] Based on this, this application provides a high antibacterial wear-resistant ceramic coating and its preparation method. Summary of the Invention

[0006] Technical problems to be solved

[0007] To address the problems mentioned in the background art, the present invention provides a wear-resistant ceramic coating with high antibacterial properties and its preparation method.

[0008] Technical solution

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A wear-resistant ceramic coating with high antibacterial properties comprises the following raw materials in parts by weight:

[0011] The mixture contains 35-40 parts modified silane, 20-25 parts silica sol, 2-3 parts film-forming aid, 4-5 parts CaO micro powder, 5-6 parts talc powder, 3-4 parts quartz powder, 5-6 parts antibacterial phase carrier powder, 1-3 parts copper ion source, 0.6-0.8 parts surfactant, 1-2 parts leveling agent, and deionized water; the mass fraction of deionized water is determined by adjusting the solid content of the coating to 50-55%.

[0012] The modified silane is a composite grafted modified silane of γ-glycidoxypropyltrimethoxysilane (hereinafter referred to as KH560) and γ-aminopropyltriethoxysilane (hereinafter referred to as KH550).

[0013] Furthermore, the silica sol has a particle size of 50-120 nm and a pH value of 9-10.

[0014] Furthermore, the CaO micro powder is 300-350 mesh, and the talc powder, quartz powder, and antibacterial phase carrier powder are all 1200-1300 mesh.

[0015] Furthermore, the modified silane is specifically prepared by the following steps:

[0016] A1. Weigh KH560 and KH550 and add them to a container. Add 3-5% of the total mass of KH560 and KH550 with deionized water. Adjust the pH of the system to 4.0-4.5 with glacial acetic acid. Place the container in a water bath at 50-60℃ and stir at 200-300r / min for 2-3 hours to hydrolyze and obtain a hydrolyzed silane solution.

[0017] A2. Add 2-4% of polyethylene glycol 400 by mass of the total silane to the hydrolyzed silane solution, and continue to stir the reaction at 50-60℃ for 1.5-2 hours. Allow it to cool naturally to room temperature to obtain the modified silane.

[0018] Furthermore, in step A1, the mass ratio of KH560 to KH550 is (6-8):(2-4).

[0019] Furthermore, the surfactant is at least one of lauryl ether-8, Tween-80, fatty alcohol polyoxyethylene ether, and sodium hexametaphosphate.

[0020] Furthermore, the leveling agent is at least one of acrylate leveling agents, silicone leveling agents, and waterborne polyurethane leveling agents.

[0021] Furthermore, the antibacterial phase carrier powder is at least one of heavy calcium carbonate powder, dolomite powder, and zeolite powder.

[0022] Furthermore, the copper ion source is at least one of anhydrous copper sulfate, copper sulfate pentahydrate, and copper acetate.

[0023] Furthermore, the film-forming aid is at least one selected from 1,4-butanediol, ethylene glycol, diethylene glycol, and propylene glycol methyl ether.

[0024] A method for preparing a wear-resistant ceramic coating with high antibacterial properties includes the following steps:

[0025] S1. Add silica sol and film-forming aid to a stirring container and stir at 50-60℃ at a rate of 600r / min for 0.5-1h. Then add modified silane dropwise. After the addition is complete, continue stirring at 50-60℃ and 600r / min for 3-4h to obtain the film-forming base solution.

[0026] S2. Add antibacterial phase carrier powder and CaO micro powder to the film-forming base solution, and stir at a rate of 500-800 r / min for 10-15 min. Then, prepare a 0.4-0.5 wt% solution using a copper ion source and add it dropwise at a rate of 1 mL / min, while maintaining stirring at 500-800 r / min. After the dropwise addition is complete, continue stirring at 50-60℃ and 500-800 r / min for 20-30 min. Finally, add talc powder and quartz powder to the system and stir at 500-800 r / min for 20-30 min to obtain the wear-resistant antibacterial base solution.

[0027] S3. Cool the mixing container to room temperature, add surfactant and leveling agent to the wear-resistant and antibacterial base liquid, adjust the solid content of the coating to 50-55% with deionized water, stir at room temperature for 20-30 minutes at a speed of 300-600 r / min, and filter through a 200 mesh sieve to obtain a high antibacterial wear-resistant ceramic coating.

[0028] Beneficial technical effects

[0029] This technical solution significantly improves the performance and value of ceramic coatings through multifaceted synergistic design, offering numerous outstanding advantages. Firstly, regarding film-forming performance, it utilizes a modified silane compound and grafting synergistic design, resulting in a stronger, more flexible coating that integrates better with the substrate and fillers, leading to a more stable and durable structure. Compared to traditional single silane or anhydride grafting processes, this design simplifies the manufacturing process, reduces energy consumption, and avoids residue-related problems. Secondly, in terms of antibacterial performance, it constructs a dual-ion synergistic antibacterial system. Through a dual mechanism of basic antibacterial action and core elimination, it effectively inhibits various pathogenic bacteria, with uniform distribution of antibacterial components and no blind spots. This system replaces expensive materials with low-cost inorganic antibacterial components, significantly reducing costs while remaining environmentally friendly, long-term stable, and without performance degradation or the release of harmful substances. Thirdly, regarding wear resistance, it relies on a crystalline phase synergistic wear-resistant system, constructing a continuous and dense wear-resistant skeleton through the combination of different fillers. This improves the coating's hardness and wear resistance while maintaining structural strength and toughness, extending the coating's service life. Finally, the components of this formula have excellent compatibility, no obvious defects after curing, strong adhesion, good water resistance, and can adapt to various application scenarios. The process is simple, highly controllable, and has high industrial application prospects and promotion value. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] The raw materials used in this embodiment of the invention are shown below.

[0032] KH550, purity ≥98%, amino value 1.6-1.8 mol / 100g;

[0033] KH560, purity ≥97%, epoxy value 0.48-0.52mol / 100g;

[0034] Silica sol, Qingdao Ocean Chemical Co., Ltd., 30% solid content, 50-100nm.

[0035] Heavy calcium carbonate powder (1250 mesh), whiteness ≥95%, CaCO3 content ≥98%;

[0036] Quartz powder (1250 mesh), purity ≥99.5%, Mohs hardness 7.0;

[0037] Zeolite powder (1250 mesh), clinoptilolite.

[0038] CaO micro powder (325 mesh), purity ≥90%.

[0039] Example 1

[0040] A wear-resistant ceramic coating with high antibacterial properties comprises the following raw materials in parts by weight: 35 parts modified silane, 20 parts silica sol, 2 parts 1,4-butanediol, 4 parts CaO micro powder, 5 parts talc powder, 3 parts quartz powder, 5 parts zeolite powder, 1 part copper sulfate pentahydrate, 0.6 parts lauryl alcohol polyether-8, 1 part BYK-381 leveling agent, and 30 parts deionized water.

[0041] The modified silane is prepared by the following steps:

[0042] A1. Weigh 28g KH560 and 7g KH550 and add them to a container. Add 1.75g ​​deionized water and add glacial acetic acid to adjust the pH to 4.0. Stir and hydrolyze in a 50℃ water bath at 200r / min for 2h to obtain hydrolyzed silane solution.

[0043] A2. Add 1.05g of polyethylene glycol 400 to the hydrolyzed silane solution, continue stirring at 50℃ for 1.5h, cool to room temperature, and obtain 35 parts of modified silane.

[0044] A method for preparing a wear-resistant ceramic coating with high antibacterial properties includes the following steps:

[0045] S1. Add 20 parts of silica sol and 2 parts of 1,4-butanediol to a mixing tank, stir at 50°C and 600 r / min for 0.5 h, add 35 parts of modified silane dropwise, and continue stirring at 50°C and 600 r / min for 3 h to obtain the film-forming base solution.

[0046] S2. Add 5 parts zeolite powder and 4 parts CaO micro powder to the film-forming base solution and stir at 500 r / min for 10 min; take 1 part copper sulfate pentahydrate, dissolve it in deionized water to prepare a 0.4 wt% solution, and add it dropwise at 1 mL / min while stirring at 500 r / min; after the dropwise addition is complete, stir at 50℃ and 500 r / min for 20 min, add 5 parts talc powder and 3 parts quartz powder, and stir at 500 r / min for 20 min to obtain the wear-resistant and antibacterial base solution;

[0047] S3. Cool to room temperature, add 0.6 parts lauryl alcohol polyether-8 and 1 part BYK-381, add deionized water, adjust the solid content to 50%, stir at 300 r / min for 20 min, filter through a 200 mesh sieve to obtain the finished product.

[0048] Example 2

[0049] A wear-resistant ceramic coating with high antibacterial properties comprises the following raw materials in parts by weight: 38 parts modified silane, 23 parts silica sol, 2.5 parts 1,4-butanediol, 4.5 parts CaO micro powder, 5.5 parts talc, 3.5 parts quartz powder, 5.5 parts zeolite powder, 2 parts copper sulfate pentahydrate, 0.7 parts lauryl ether-8, 1.5 parts BYK-381 leveling agent, and 32 parts deionized water.

[0050] The modified silane is prepared by the following steps: A1. Weigh 26.6g KH560 and 11.4g KH550 and add them to a container. Add 1.9g deionized water and add glacial acetic acid to adjust the pH to 4.3. Stir and hydrolyze in a 55℃ water bath at 250r / min for 2.5h to obtain hydrolyzed silane solution.

[0051] A2. Add 1.52g of polyethylene glycol 400 to the hydrolyzed silane solution, continue stirring at 55℃ for 1.8h, cool to room temperature, and obtain 38 parts of modified silane.

[0052] A method for preparing a wear-resistant ceramic coating with high antibacterial properties includes the following steps:

[0053] S1. Add 23 parts of silica sol and 2.5 parts of 1,4-butanediol to a mixing tank, stir at 55℃ and 600r / min for 0.8h, add 38 parts of modified silane dropwise, and continue stirring at 55℃ and 600r / min for 3.5h to obtain the film-forming base solution.

[0054] S2. Add 5.5 parts zeolite powder and 4.5 parts CaO micro powder to the film-forming base solution and stir at 650 r / min for 12 min; take 2 parts copper sulfate pentahydrate, dissolve it in deionized water to prepare a 0.45 wt% solution, and add it dropwise at 1 mL / min while stirring at 650 r / min; after the dropwise addition is complete, stir at 55℃ and 650 r / min for 25 min, add 5.5 parts talc powder and 3.5 parts quartz powder, and stir at 650 r / min for 25 min to obtain the wear-resistant and antibacterial base solution;

[0055] S3. Cool to room temperature, add 0.7 parts lauryl alcohol polyether-8 and 1.5 parts BYK-381, add deionized water, adjust the solid content to 53%, stir at 450 r / min for 25 min, filter through a 200 mesh sieve to obtain the finished product.

[0056] Example 3

[0057] A wear-resistant ceramic coating with high antibacterial properties comprises the following raw materials in parts by weight:

[0058] 40 parts modified silane, 25 parts silica sol, 3 parts 1,4-butanediol, 5 parts CaO micro powder, 6 parts talc, 4 parts quartz powder, 6 parts zeolite powder, 3 parts copper sulfate pentahydrate, 0.8 parts lauryl alcohol polyether-8, 2 parts BYK-381 leveling agent, and 35 parts deionized water.

[0059] The modified silane is prepared by the following steps:

[0060] A1. Weigh 24g KH560 and 16g KH550 into a container, add 2.0g deionized water, add glacial acetic acid to adjust the pH to 4.5, and hydrolyze by stirring at 300r / min in a 60℃ water bath for 3h to obtain hydrolyzed silane solution.

[0061] A2. Add 1.6g of polyethylene glycol 400 to the hydrolyzed silane solution, continue stirring at 60℃ for 2h, cool to room temperature, and obtain 40 parts of modified silane.

[0062] A method for preparing a wear-resistant ceramic coating with high antibacterial properties includes the following steps:

[0063] S1. Add 25 parts of silica sol and 3 parts of 1,4-butanediol to a mixing tank, stir at 60°C and 600 r / min for 1 h, add 40 parts of modified silane dropwise, and continue stirring at 60°C and 600 r / min for 4 h to obtain the film-forming base solution.

[0064] S2. Add 6 parts zeolite powder and 5 parts CaO micro powder to the film-forming base solution and stir at 800 r / min for 15 min; take 3 parts copper sulfate pentahydrate, dissolve it in deionized water to prepare a 0.5 wt% solution, and add it dropwise at 1 mL / min while stirring at 800 r / min; after the dropwise addition is complete, stir at 60℃ and 800 r / min for 30 min, add 6 parts talc powder and 4 parts quartz powder, and stir at 800 r / min for 30 min to obtain the wear-resistant and antibacterial base solution;

[0065] S3. Cool to room temperature, add 0.8 parts lauryl alcohol polyether-8 and 2 parts BYK-381, add deionized water to adjust the solid content to 55%, stir at 600 r / min for 30 min, filter through a 200 mesh sieve to obtain the finished product.

[0066] Comparative Example 1

[0067] The difference between this comparative example and Example 2 is that only 38 parts of KH560 were used in the preparation of the modified silane, without the addition of KH550. Specifically, the modified silane in this comparative example was prepared by the following steps:

[0068] A1. Weigh 38g of KH560 and add it to a container. Add 1.9g of deionized water and add glacial acetic acid to adjust the pH to 4.3. Stir and hydrolyze in a 55℃ water bath at 250r / min for 2.5h to obtain hydrolyzed silane solution.

[0069] A2. Add 1.52g of polyethylene glycol 400 to the hydrolyzed silane solution, continue stirring at 55℃ for 1.8h, cool to room temperature, and obtain 38 parts of modified silane.

[0070] Comparative Example 2

[0071] The difference between this comparative example and Example 2 is that, in the preparation of the modified silane, conventional phthalic anhydride grafting was used instead of PEG400 grafting; the remaining steps are the same as in Example 2. Specifically, the modified silane in this comparative example was prepared by the following steps:

[0072] A1. Weigh 26.6g KH560 and 11.4g KH550 into a container, add 1.9g deionized water, add glacial acetic acid to adjust the pH to 4.3, and hydrolyze by stirring at 250r / min in a 55℃ water bath for 2.5h to obtain hydrolyzed silane solution.

[0073] A2. Add 3.8g of phthalic anhydride and 0.38g of allylamine catalyst to the hydrolyzed silane solution, heat to 120℃ and stir for 3h, cool to room temperature, remove unreacted anhydride by vacuum distillation, and obtain 38 parts of modified silane.

[0074] Comparative Example 3

[0075] The difference between this comparative example and Example 2 is that nano-silver (particle size 50nm, purity ≥99.9%) is used instead of the antibacterial component in the formulation. That is, nano-silver is used instead of copper sulfate pentahydrate and calcium oxide components. The remaining raw materials and preparation steps are the same as in Example 2. Specifically, the wear-resistant ceramic coating with high antibacterial properties in this comparative example includes the following raw materials in parts by weight: 38 parts modified silane, 23 parts silica sol, 2.5 parts 1,4-butanediol, 6.5 parts nano-silver, 5.5 parts talc, 3.5 parts quartz powder, 5.5 parts zeolite powder, 0.7 parts lauryl ether-8, 1.5 parts BYK-381 leveling agent, and 32 parts deionized water.

[0076] Comparative Example 4

[0077] The difference between this comparative example and Example 2 is that talc powder and quartz powder are removed and replaced with heavy calcium carbonate powder; the remaining raw materials and preparation steps are the same as in Example 2. Specifically, the wear-resistant ceramic coating with high antibacterial properties in this comparative example includes the following raw materials in parts by weight: 38 parts modified silane, 23 parts silica sol, 2.5 parts 1,4-butanediol, 4.5 parts CaO micro powder, 9 parts heavy calcium carbonate powder, 5.5 parts zeolite powder, 2 parts copper sulfate pentahydrate, 0.7 parts lauryl ether-8, 1.5 parts BYK-381 leveling agent, and 32 parts deionized water.

[0078] The basic performance of the products prepared in the examples and comparative examples is now being tested. Coating samples from different groups were coated and cured using Q235 steel sheet substrate (pre-sandblasted, Ra=1.2μm), sprayed, with a dry film thickness of 60±5μm, baked at 80℃ for 20min, and cooled to room temperature until completely dry to obtain the test samples. The specific methods for testing the test samples are as follows:

[0079] 1. Pencil hardness test: Refer to the method described in GB / T6739-2006, use 6H-10H pencils under a load of 750g at a speed of 1mm / s, and record the highest pencil hardness that does not scratch the coating. Each sample is tested 5 times.

[0080] 2. Wear resistance test: Refer to the method described in GB / T1768-2006, set the test parameters as follows: grinding wheel CS-10, load 500g, rotation speed 60rpm, number of revolutions 1000, and then calculate the weight loss of coating after wear.

[0081] 3. Adhesion test: Refer to the method described in GB / T986-1998, set the grid spacing to 1mm, the grid depth to the substrate, the tape adhesion force to 10N, and record the coating peeling level after the sample is crossed.

[0082] 4. Water resistance test: Refer to the method described in GB / T1733-1993, immerse the sample in water at 25℃ for 72 hours, observe the coating condition, and it is qualified if there is no blistering, peeling, or loss of gloss.

[0083] The specific test results are shown in Table 1 below.

[0084] Table 1

[0085] Group Pencil hardness Abrasion resistance weight loss (g) Adhesion (Grade) Water resistance (72h) Example 1 8.5H 0.016 0 No bubbling or peeling Example 2 9H 0.011 0 No bubbling or peeling Example 3 10H 0.012 0 No bubbling or peeling Comparative Example 1 8H 0.019 1 Local microbubbles Comparative Example 2 8.5H 0.016 1 Slight loss of light Comparative Example 3 9H 0.021 0 No bubbling or peeling Comparative Example 4 7H 0.045 0 No bubbling or peeling

[0086] In terms of hardness and wear resistance, the samples prepared in the examples showed lower wear loss compared to the comparative examples. The examples employed a modified silane design and a synergistic wear-resistant system combining talc and quartz powder. The compounded silane provided ample active sites, fully condensing with silica sol to form a dense film phase that firmly encapsulates the wear-resistant filler; while the combination of layered talc and high-hardness quartz powder constructed a continuous and dense wear-resistant framework, effectively resisting external friction and impact. Comparative Example 1, due to its single silane design without compounding, had insufficient active sites and weak bonding between the film-forming phase and inorganic filler, resulting in a decrease in both hardness and wear resistance, while water resistance was also affected. Comparative Example 2 replaced PEG400 grafting with traditional acid anhydride grafting, which maintained a certain level of hardness, but the rigid structure formed by the acid anhydride grafting reduced the flexibility of the film-forming phase, resulting in wear resistance inferior to the example, and the residual unreacted components affected water resistance stability. Comparative Example 4 replaced the crystalline phase synergistic wear-resistant system with a single heavy calcium carbonate powder. Due to the insufficient hardness of the heavy calcium carbonate powder, it could not form an effective wear-resistant support, leading to a significant decrease in hardness and a substantial increase in wear loss, fully demonstrating the key role of crystalline phase synergistic design in wear resistance performance. Although the hardness of Comparative Example 3 was comparable to that of the example, its wear resistance was slightly inferior, mainly because the nano-silver and the coating were only physically bonded and did not participate in the optimization of the film-forming structure, thus failing to enhance the stability of the wear-resistant skeleton.

[0087] In terms of adhesion and water resistance, the samples prepared in the examples showed more stable water resistance. The modified silane enabled the film-forming phase to form a strong bond with the substrate and to be closely compatible with the inorganic antibacterial and wear-resistant components, resulting in a continuous, defect-free coating structure after curing, effectively preventing moisture penetration. Comparative Examples 1 and 2 showed varying degrees of decreased adhesion and localized defects in water resistance. The core reason was insufficient film-forming strength of the single silane, or localized reactions between the residual acid anhydride grafted components and the inorganic phase, leading to microcracks in the coating and easy water penetration, causing defects. While Comparative Examples 3 and 4 achieved satisfactory adhesion, Comparative Example 3 showed insufficient wear resistance, and Comparative Example 4 exhibited significant reductions in hardness and wear resistance, failing to achieve a balanced overall performance.

[0088] The antibacterial effects of the samples prepared in Examples 1-3 and Comparative Examples 1-4 were then tested. Following the method described in GB / T21510-2008, Staphylococcus aureus (ATCC 25922) and Escherichia coli (ATCC 6538) were used as test bacteria, with a bacterial concentration of 1×10⁶ CFU / mL, a contact time of 24 hours, and a temperature of 37°C. The antibacterial rate of the samples in different groups was then calculated as follows: Antibacterial rate = (1 - Number of colonies in the test group / Number of colonies in the control group) × 100%. The specific test results are shown in Table 2 below.

[0089] Table 2

[0090] Group Antibacterial rate of Escherichia coli (%) Antibacterial rate against Staphylococcus aureus (%) Example 1 99.91 99.92 Example 2 99.99 99.99 Example 3 99.97 99.99 Comparative Example 1 99.85 99.90 Comparative Example 2 99.84 99.88 Comparative Example 3 98.50 99.80 Comparative Example 4 99.81 99.73

[0091] In terms of antibacterial properties, the samples prepared in the examples showed extremely strong inhibitory effects against both *Escherichia coli* and *Staphylococcus aureus*, demonstrating comprehensive antibacterial performance. This verified the effectiveness of the Ca2+ used in the examples. 2+ / Cu 2+ Dual-ion synergistic antibacterial design. Specifically, CaO releases Ca... 2+ The coating microenvironment can be adjusted to inhibit bacterial growth and form a basic antibacterial barrier; Cu supported in situ by zeolite powder 2+ It can destroy bacterial cell membranes through electrostatic adsorption, achieving highly efficient killing. The two work synergistically to form an antibacterial system without dead zones, exerting a stable inhibitory effect on both Gram-negative and Gram-positive bacteria. The antibacterial performance of Comparative Examples 1 and 2 is slightly reduced, mainly because the modified silane film-forming structure has defects, affecting the uniform distribution of antibacterial components and leading to a decrease in local antibacterial effect. Comparative Example 3 uses single nano-silver for antibacterial purposes. Although it has a certain inhibitory effect on Staphylococcus aureus, its antibacterial performance against Escherichia coli is significantly insufficient. Moreover, nano-silver is prone to agglomeration, which cannot form a uniform antibacterial distribution and has poor antibacterial stability. At the same time, its high cost also limits its application. Comparative Example 4 lacks a crystalline phase synergistic wear-resistant system. Although the antibacterial components are not affected, the overall comprehensive performance is unbalanced, and the wear resistance effect is reduced.

[0092] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0093] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

[0094] Those skilled in the art should understand that the above descriptions are merely several specific embodiments of the present invention, and not all embodiments.

Claims

1. A wear-resistant ceramic coating with high antibacterial properties, characterized in that, Includes the following quantities of raw materials: The mixture contains 35-40 parts modified silane, 20-25 parts silica sol, 2-3 parts film-forming aid, 4-5 parts CaO micro powder, 5-6 parts talc powder, 3-4 parts quartz powder, 5-6 parts antibacterial phase carrier powder, 1-3 parts copper ion source, 0.6-0.8 parts surfactant, 1-2 parts leveling agent, and deionized water; the mass fraction of deionized water is determined by adjusting the solid content of the coating to 50-55%. The modified silane is a composite grafted modified silane of γ-glycidoxypropyltrimethoxysilane and γ-aminopropyltriethoxysilane.

2. The wear-resistant ceramic coating with high antibacterial properties according to claim 1, characterized in that, The silica sol has a particle size of 50-120 nm and a pH value of 9-10.

3. The wear-resistant ceramic coating with high antibacterial properties according to claim 1, characterized in that, The CaO powder is 300-350 mesh, and the talc powder, quartz powder, and antibacterial phase carrier powder are all 1200-1300 mesh.

4. The wear-resistant ceramic coating with high antibacterial properties according to claim 1, characterized in that, The modified silane is prepared by the following steps: A1. Weigh KH560 and KH550 and add them to a container. Add 3-5% of the total mass of KH560 and KH550 with deionized water. Adjust the pH of the system to 4.0-4.5 with glacial acetic acid. Place the container in a water bath at 50-60℃ and stir at 200-300r / min for 2-3 hours to hydrolyze and obtain a hydrolyzed silane solution. A2. Add 2-4% of polyethylene glycol 400 to the hydrolyzed silane solution, and continue stirring at 50-60℃ for 1.5-2 hours. Allow it to cool naturally to room temperature to obtain the modified silane.

5. The wear-resistant ceramic coating with high antibacterial properties according to claim 4, characterized in that, In step A1, the mass ratio of KH560 to KH550 is (6-8):(2-4).

6. The wear-resistant ceramic coating with high antibacterial properties according to claim 1, characterized in that, The surfactant is at least one of lauryl alcohol polyether-8, Tween-80, fatty alcohol polyoxyethylene ether, and sodium hexametaphosphate.

7. The wear-resistant ceramic coating with high antibacterial properties according to claim 1, characterized in that, The leveling agent is at least one of acrylate leveling agents, silicone leveling agents, and waterborne polyurethane leveling agents.

8. The wear-resistant ceramic coating with high antibacterial properties according to claim 1, characterized in that, The antibacterial phase carrier powder is at least one of heavy calcium carbonate powder, dolomite powder, and zeolite powder.

9. The wear-resistant ceramic coating with high antibacterial properties according to claim 1, characterized in that, The copper ion source is at least one of anhydrous copper sulfate, copper sulfate pentahydrate, and copper acetate.

10. A method for preparing a wear-resistant ceramic coating with high antibacterial properties as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Add silica sol and film-forming aid to a stirring container and stir for 0.5-1h. Then add modified silane dropwise. After the addition is complete, continue stirring at 50-60℃ for 3-4h to obtain the film-forming base solution. S2. Add antibacterial phase carrier powder and CaO micro powder to the film-forming base solution and stir for 10-15 min. Then, prepare a 0.4-0.5 wt% solution using a copper ion source and add it dropwise while stirring. After the dropwise addition is complete, continue stirring for 20-30 min. Finally, add talc powder and quartz powder to the system and stir for 20-30 min to obtain the wear-resistant antibacterial base solution. S3. Cool the mixing container to room temperature, add surfactant and leveling agent to the wear-resistant and antibacterial base liquid, adjust the solid content of the coating to 50-55% with deionized water, stir and sieve to obtain a high antibacterial wear-resistant ceramic coating.