Preparation method and application of rare earth antibacterial glaze

Abstract

The preparation method of the rare earth antibacterial glaze comprises the following steps: mixing 30-48 parts by mass of quartz sand, 20-35 parts by mass of borax, 25-35 parts by mass of feldspar powder and 10-25 parts by mass of zinc oxide into a ball mill for ball milling, sieving the ball-milled material, and drying to obtain powder A; mixing 0.5-3 parts of lanthanum oxide, 0.5-2 parts of cerium oxide and 100 parts of powder A into a ball mill for ball milling, and sieving and drying the ball-milled material to obtain powder B; melting the powder B at 1350-1400 DEG C to obtain a glaze melt, taking out the glaze melt, tabletting, and cooling to obtain a glaze frit; and carrying out ball milling on the glaze frit until the particle size is less than 20 microns, slowly heating to 650-700 DEG C, and carrying out heat preservation for 25-30 minutes to obtain the rare earth antibacterial glaze. The ceramic prepared from the rare earth antibacterial glaze has broad-spectrum antibacterial performance, inhibits the breeding of microorganisms such as bacteria and fungi, and reduces the infection risk.

Description

Technical Field

[0001] The present invention relates to a preparation method of a rare earth antibacterial glaze, and specifically relates to a preparation method and application of a rare earth antibacterial glaze, belonging to the technical field of ceramic glazes. Background Art

[0002] Antibacterial ceramics are a type of ceramic product that uses special antibacterial materials to form an antibacterial layer on the surface of the porcelain body, thereby exerting an antibacterial effect. Its antibacterial mechanism mainly achieves the antibacterial effect by physically capturing and destroying the cell wall of bacteria through lanthanum oxide.

[0003] Currently, the main method for preparing antibacterial ceramics is to add glass powder or metal oxide containing antibacterial components to the ceramic glaze to form a nanoscale antibacterial film on the surface of the ceramic.

[0004] Traditional antibacterial ceramics are applied in the medical field, can sterilize and disinfect, and prevent cross-infection of bacteria, and can be used in medical scenarios such as wards and operating rooms; applied in the food processing and tableware fields, can effectively kill bacteria, thereby preventing food contamination and cross-infection; in the environmental protection field, can be applied to treat sewage and oil stains to achieve the effect of purifying the environment.

[0005] As a new type of material, the current application of rare earth antibacterial ceramics at home and abroad is still in the research and development stage.

[0006] Therefore, it is necessary to provide a preparation method and application of a rare earth antibacterial glaze for preparing daily-use ceramic products with broad-spectrum antibacterial properties through research and development, inhibiting the growth of microorganisms such as bacteria and fungi, reducing the risk of infection, and improving the hygienic safety of products. Summary of the Invention

[0007] In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide a preparation method and application of a rare earth antibacterial glaze.

[0008] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0009] A preparation method of a rare earth antibacterial glaze, comprising the following steps:

[0010] S1. Mix quartz sand, borax, feldspar powder, zinc oxide into a ball mill for ball milling. After ball milling, the material is sieved and dried to obtain powder A;

[0011] S2. Mix lanthanum oxide, cerium oxide, and powder A into a ball mill for ball milling. After ball milling, the material is sieved and dried to obtain powder B;

[0012] S3. Melt powder B at 1350 - 1400 °C to obtain a glaze melt. After taking it out, press it into tablets and cool to obtain a glaze frit. Ball mill the glaze frit until the particle size is less than 20 microns, slowly heat it to 650 °C - 700 °C, and keep it warm for 25 - 30 minutes to obtain a rare earth antibacterial glaze.

[0013] By mass, the above raw materials are 30 - 48 parts of quartz sand, 20 - 35 parts of borax, 25 - 35 parts of feldspar powder, 10 - 25 parts of zinc oxide, 0.5 - 3 parts of lanthanum oxide, and 0.5 - 2 parts of cerium oxide.

[0014] The sieving in step S1 above is 300 meshes, and the sieving in step S2 is 300 meshes.

[0015] The ball milling speed in steps S1 and S2 above is 550 - 750 r / min, and ball milling is carried out for 2 - 3 h.

[0016] The above zinc oxide, lanthanum oxide, and cerium oxide are all nanoscale, with a particle size of 30 - 50 nm.

[0017] The application of the above rare earth antibacterial glaze in the preparation of antibacterial ceramics.

[0018] Furthermore, the glaze application thickness of the above antibacterial ceramics is 0.6 - 0.8 mm.

[0019] The advantages of the present invention are as follows:

[0020] A preparation method of a rare earth antibacterial glaze of the present invention uses rare earth elements such as cerium oxide and lanthanum oxide with high antibacterial activity, stabilizes their ionic forms by using rare earth elements, destroys the cell membranes of microorganisms, interferes with DNA replication, or releases reactive oxygen free radicals, improving the antibacterial broad-spectrum property and reducing metal precipitation pollution.

[0021] In the process, ball milling is used. On the one hand, the particle size is refined, and on the other hand, the temperature generated by ball milling is used to improve the adhesion and antibacterial persistence of rare earth oxides such as cerium oxide and lanthanum oxide in the ceramic glaze.

[0022] The ceramics prepared by the present invention using the rare earth antibacterial glaze break the possible adverse factors to humans caused by the use of antibacterial materials such as silver, titanium, and copper in traditional antibacterial ceramics, and prepare daily-use ceramic products with broad-spectrum antibacterial properties; inhibit the growth of microorganisms such as bacteria and fungi, and reduce the infection risk. Rare earth antibacterial has the advantages of long-lasting broad-spectrum, low migration rate, good durability, strong antibacterial broad-spectrum property, heat and temperature resistance, and environmental friendliness. It can be widely applied to various scenario fields, with strong practicality and wide applicability. Specific Embodiments

[0023] The following specifically introduces the present invention in combination with specific embodiments.

[0024] A preparation method of a rare earth antibacterial glaze, comprising the following steps:

[0025] S1. Mix 30 - 48 parts of quartz sand, 20 - 35 parts of borax, 25 - 35 parts of feldspar powder, and 10 - 25 parts of nano - zinc oxide in a ball mill and ball - mill for 2 - 3 h at a ball - mill rotation speed of 550 - 750 r / min. Sieve the milled material through a 300 - mesh sieve and dry it to obtain powder A;

[0026] Among them, the particle size of the nano - zinc oxide is 30 - 50 nm.

[0027] S2. Mix 0.5 - 3 parts of lanthanum oxide, 0.5 - 2 parts of cerium oxide, and 100 parts of powder A in a ball mill and ball - mill for 2 - 3 h at a ball - mill rotation speed of 550 - 750 r / min. Sieve the milled material through a 1000 - mesh sieve and dry it to obtain powder B;

[0028] S3. Melt powder B at 1350 - 1400 °C to obtain a glaze melt. After taking it out, press it into tablets and cool to obtain a glaze frit. Ball - mill the glaze frit until the particle size is less than 20 microns, slowly heat it to 680 °C - 720 °C, and keep it warm for 30 - 40 minutes to obtain the rare earth antibacterial glaze.

[0029] The following Table 1 shows the specific examples and parts by mass:

[0030] Table 1 Examples 1 - 5

[0031] Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Quartz sand 30 35 30 40 32 32 Borax 20 20 20 25 23 23 Feldspar powder 35 35 30 25 34 31 Zinc oxide 15 10 20 10 10 14 Lanthanum oxide 0.5 1.2 3 1 2 2.5 Cerium oxide 0.5 1.1 2 0.8 1.6 1.5

[0032] Preparation and detection of antibacterial ceramics

[0033] After applying a surface glaze on the bowl blank, spray the antibacterial glaze prepared from Examples 1 - 6 on the surface of the surface glaze respectively, with a glazing thickness of 0.6 - 0.8 mm, and sinter it at a certain firing temperature to obtain an antibacterial glaze bowl. The firing temperature, Mohs hardness, and wear resistance level of Examples 1 - 6 are shown in the following Table 2.

[0034] The wear resistance level is determined according to the method in Part 7: Determination of surface abrasion resistance of glazed tiles in "GB / T 3810.7 - 2006 Test methods for ceramic tiles".

[0035] Table 2 Wear resistance and hardness

[0036] Firing temperature (°C) Wear resistance grade Mohs hardness Example 1 1100 4 6 Example 2 900 5 6 Example 3 1300 6 7 Example 4 1260 6 7 Example 5 1180 6 7 Example 6 1210 6 7

[0037] Antibacterial performance: It is determined according to the test method in Appendix A of the standard "JC / T 897 - 2014(2017) Antibacterial performance of antibacterial ceramic products". The antibacterial performance requirement is ≥90%, and the results are shown in the following Table 3.

[0038] Table 3 Antibacterial performance

[0039]

[0040]

[0041] Antibacterial durability performance: It is determined according to the test method in 7.3 of the standard "JC / T 897-2014(2017) Antibacterial Properties of Antibacterial Ceramic Products" and the standard "GB / T 9266-2009 Determination of Scrub Resistance of Architectural Coating Films". The scrubbing solution is sodium hypochlorite disinfectant with a concentration of 5%, and the number of scrubbing times is 500 times. The results are shown in Table 4 below. The requirement for antibacterial durability performance in the standard "JC / T 897-2014(2017) Antibacterial Properties of Antibacterial Ceramic Products" is ≥85%.

[0042] Table 4 Antibacterial durability performance

[0043]

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form. Any technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A preparation method of a rare earth antibacterial glaze, characterized in that, It includes the following steps: S1. Mix quartz sand, borax, feldspar powder, and zinc oxide in a ball mill for ball milling. After ball milling, sieve and dry the material to obtain powder A; S2. Mix lanthanum oxide, cerium oxide, and powder A in a ball mill for ball milling. After ball milling, sieve and dry the material to obtain powder B; S3. Melt powder B at 1350 - 1400 °C to obtain a glaze melt. After taking it out, press and cool to obtain a glaze frit. Ball mill the glaze frit until the particle size is less than 20 microns, slowly heat up to 650 °C - 700 °C, and keep warm for 25 - 30 minutes to obtain a rare earth antibacterial glaze; By mass, the above raw materials are 30 - 48 parts of quartz sand, 20 - 35 parts of borax, 25 - 35 parts of feldspar powder, 10 - 25 parts of zinc oxide, 0.5 - 3 parts of lanthanum oxide, and 0.5 - 2 parts of cerium oxide.

2. The preparation method according to claim 1, characterized in that, The sieving in step S1 is 300 mesh, and the sieving in step S2 is 300 mesh.

3. The preparation method according to claim 1, characterized in that, The ball milling speed in steps S1 and S2 is 550 - 750 r / min, and ball milling is carried out for 2 - 3 h.

4. The preparation method according to claim 1, wherein The lanthanum oxide, zinc oxide, and cerium oxide are all nanoscale, with a particle size of 30 - 50 nm.

5. According to the preparation method described in any one of claims 1-4, it is characterized in that The application of the rare earth antibacterial glaze in the preparation of antibacterial ceramics.

6. The preparation method according to claim 5, characterized in that, The glazing thickness of the antibacterial ceramic is 0.6 - 0.8 mm.

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