Antibacterial and antifouling ceramic material and preparation method thereof

Abstract

The application relates to the technical field of materials, and discloses an antibacterial and antifouling ceramic material and a preparation method thereof. The ceramic material is prepared by ball milling and mixing of potassium feldspar, sodium feldspar and functionally modified halloysite as raw materials. The functionally modified halloysite is nano zinc oxide-loaded halloysite nanotube coated with silica sol on the surface. The silica sol has very low surface energy, can make the glaze layer formed by sintering of the ceramic glaze show hydrophobicity, and thus endows the glaze layer with excellent antifouling and self-cleaning performance. In addition, after being coated with the silica sol, the silver loaded in the halloysite nanotube is protected by the tube wall in the sintering process of the ceramic, can continuously release the silver after the glaze layer is formed subsequently, and endows the glaze layer with long-acting and slow-releasing antibacterial effect. The nano zinc oxide has excellent photocatalytic antibacterial performance, can be synergistic with the silver, and can greatly enhance the antibacterial performance of the ceramic glaze with a small amount of addition.

Description

Technical Field

[0001] This invention relates to the field of materials technology, specifically to an antibacterial and antifouling ceramic material and its preparation method. Background Technology

[0002] Ceramics, as an important carrier of human civilization, has a development history that spans all stages of human society. Traditional ceramics use clay as the main raw material and are made through processes such as shaping and firing. Modern ceramic materials have expanded to include advanced ceramic systems such as oxides, nitrides, and carbides, and are widely used in sanitary ware, daily-use ceramics, electronics, aerospace, and medical fields. Regardless of whether it is traditional or advanced ceramics, glaze is the core material for improving their performance and function.

[0003] Glaze is a thin, glassy layer applied to the surface of a ceramic body. It is made by mixing mineral raw materials such as quartz, feldspar, and clay with chemical raw materials in a specific ratio to form a glaze slurry, which is then sintered at high temperatures to bond with the body. Its core functions include surface performance optimization, improved mechanical strength, decoration, and protection. However, with the continuous development of ceramics in the field of daily-use ceramics, the functionality of ceramic glazes has gradually gained attention, especially in terms of antibacterial and anti-fouling properties. Because ceramic cups, ceramic basins, ceramic sanitary ware, and other products are exposed to high humidity and high pollution environments for extended periods, their surfaces easily become breeding grounds for microorganisms. This not only leads to the accumulation of stains but also produces odors and may even cause the spread of diseases. Therefore, developing ceramic glazes with antibacterial and anti-fouling functions is of great significance.

[0004] Currently, it is common to use heavy metals such as silver as antibacterial additives in ceramic glazes. However, during the high-temperature sintering process of ceramics, silver will precipitate and erode, which greatly reduces its effectiveness. Based on this, the present invention provides an antibacterial and antifouling ceramic material that can solve the problems existing in the prior art. Summary of the Invention

[0005] In order to solve the problems mentioned in the background art, the purpose of this invention is to provide an antibacterial and antifouling ceramic material and its preparation method.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] An antibacterial and antifouling ceramic material, comprising the following raw materials by weight:

[0008] Potassium feldspar 30-45 parts, sodium feldspar 20-30 parts, kaolinite 5-15 parts, sepiolite 3-5 parts, tourmaline 2-4 parts, zircon 1-2 parts, zircon 5-10 parts, calcium carbonate 10-15 parts, limestone 2-6 parts, bauxite 1-2 parts, functional modified halloysite 0.5-1.5 parts, sodium carboxymethyl cellulose 1-2 parts, sodium tripolyphosphate 1.5-3 parts.

[0009] As a further aspect of the present invention, the preparation method of the functionally modified halloysite includes the following steps:

[0010] Step 1: Add supported halloysite nanotubes to deionized water and stir to disperse evenly to form dispersion A; add nano zinc oxide to deionized water and ultrasonically disperse evenly to form dispersion B; add N,N'-bis(2-hydroxyethyl)-N,N'-bis(trimethoxysilylpropyl)ethylenediamine to anhydrous ethanol and stir to mix evenly to prepare a mixture.

[0011] Step 2: Mix dispersion A and dispersion B to form a precursor solution. Then add the mixture to the precursor solution. After the addition is complete, adjust the pH to 4-5. Next, raise the temperature to 60-70℃ and stir for 2-4 hours. Then add silica sol. After the addition is complete, raise the temperature to 80-90℃ and stir for 4-8 hours. Then stop heating, cool down and discharge the material. Collect the product to obtain functional modified halloysite.

[0012] As a further aspect of the present invention, in step one, the method for preparing the supported halloysite nanotubes includes the following steps:

[0013] Step S1: Add halloysite nanotubes to N,N-dimethylformamide and disperse evenly. Then, add anhydride modifier and p-toluenesulfonic acid. After the addition is complete, raise the temperature to 90-100℃ and stir continuously for 4-6 hours to obtain modified halloysite nanotubes.

[0014] Step S2: Disperse the modified halloysite nanotubes in deionized water, and then continue to add silver nitrate solution with a concentration of 0.1-0.2 mol / L. After the addition is complete, control the ultrasonic frequency to 80-100 kHz and ultrasonically treat for 2-3 hours. Then separate the solid material to form the intermediate material.

[0015] Step S3: Mix the silver ammonia solution and ascorbic acid solution and stir evenly. Then add the intermediate material. After the addition is complete, control the ultrasonic frequency to 100-120kHz and sonicate for 1-2 hours. Separate the solid material, wash and vacuum dry it to obtain the supported halloysite nanotubes.

[0016] As a further aspect of the present invention, in step S1, the anhydride modifier is any one of succinic anhydride, maleic anhydride, or glutaric anhydride.

[0017] As a further aspect of the present invention, in step S3, the concentration of the silver ammonia solution is 0.2-0.3 mol / L; and the concentration of the ascorbic acid solution is 0.1-0.2 mol / L.

[0018] As a further aspect of the present invention, in step one, the mass fraction of the dispersion A is 10-20%.

[0019] As a further aspect of the present invention, in step one, the mass fraction of the dispersion B is 5-10%.

[0020] As a further aspect of the present invention, in step one, the mass fraction of the mixture is 1-2%.

[0021] As a further aspect of the present invention, in step two, the volume ratio of the precursor liquid to the mixture is 3-5:1.

[0022] In the above technical solution, halloysite nanotubes are first modified by carboxylation using an anhydride modifier to obtain modified halloysite nanotubes. In aqueous solution, the carboxyl groups ionize to generate carboxyl anions, which causes a large amount of silver ions generated by the ionization of silver nitrate to accumulate around the halloysite nanotubes. Then, through ultrasonic treatment, the silver ions around the halloysite nanotubes break through the potential barrier at the opening of the halloysite nanotubes and enter the interior of the nanotubes. Next, under the action of silver ammonia solution, silver seeds grow in situ inside the tubes. Under the action of ascorbic acid, the silver ions are reduced to form silver-loaded halloysite nanotubes, i.e., supported halloysite nanotubes.

[0023] Specifically, supported halloysite nanotubes and nano-zinc oxide are separately formulated into dispersions. N,N'-bis(2-hydroxyethyl)-N,N'-bis(trimethoxysilylpropyl)ethylenediamine is used as a linker. The siloxane groups at both ends of its structure are hydrolyzed under acidic conditions, thereby achieving organic connection between the supported halloysite nanotubes and nano-zinc oxide to form a nano-zinc oxide-supported halloysite nanotube intermediate. At the same time, the hydroxyl groups in the structure of N,N'-bis(2-hydroxyethyl)-N,N'-bis(trimethoxysilylpropyl)ethylenediamine undergo hydrolytic condensation with silica sol, thereby coating the surface of the intermediate with silica sol to obtain functionally modified halloysite.

[0024] A method for preparing an antibacterial and antifouling ceramic material includes the following steps:

[0025] Step 1: Weigh and prepare all the raw materials according to their weight proportions;

[0026] The second step involves adding potassium feldspar, sodium feldspar, kaolin, sepiolite, tourmaline, zircon, calcium carbonate, limestone, bauxite, and functionally modified halloysite into a mixer. After mechanically mixing them evenly, the mixture is transferred to a ball mill and ball-milled until the residue on a 10,000-mesh sieve is less than 0.05%, thus forming the base material.

[0027] The third step involves adding sodium carboxymethyl cellulose and sodium tripolyphosphate to the base material, stirring until evenly mixed, and then continuing to add more, adjusting the specific gravity to 1.5-1.65 g / cm³. 3 After standing and defoaming, ceramic materials can be obtained.

[0028] The beneficial effects of this invention are:

[0029] The functionally modified halloysite prepared in this invention consists of nano-zinc oxide-supported halloysite nanotubes coated with silica sol. On one hand, silica sol has extremely low surface energy, which allows the surface of the glaze layer formed by ceramic glaze sintering to exhibit strong hydrophobicity, thus endowing the glaze layer with excellent anti-fouling and self-cleaning properties. On the other hand, after being coated with silica sol, the silver supported within the halloysite nanotubes is protected by the tube wall during ceramic sintering. This prevents it from flowing out during ball milling and ensures it is not easily ablated and precipitated. Furthermore, it continuously releases silver after the glaze layer is formed, giving the glaze layer a long-lasting, slow-release antibacterial effect. Meanwhile, nano-zinc oxide has excellent photocatalytic antibacterial properties and can synergistically work with silver, achieving a significant enhancement of the antibacterial performance of the ceramic glaze with only a small amount added.

[0030] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Detailed Implementation

[0031] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and 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.

[0032] Preparation Example

[0033] Preparation of functionally modified halloysite:

[0034] Step 1: Add supported halloysite nanotubes to deionized water and stir to disperse evenly, forming a dispersion A with a mass fraction of 20%; add nano zinc oxide to deionized water and ultrasonically disperse evenly, forming a dispersion B with a mass fraction of 10%; add N,N'-bis(2-hydroxyethyl)-N,N'-bis(trimethoxysilylpropyl)ethylenediamine to anhydrous ethanol and stir to mix evenly, preparing a mixture with a mass fraction of 1.5%.

[0035] Step 2: Mix 20 mL of dispersion A and 20 mL of dispersion B to form a precursor solution. Then add 10 mL of the mixture to the precursor solution. After the addition is complete, adjust the pH to 4. Next, raise the temperature to 65°C and stir for 3 hours. Then add 3.5 g of silica sol. After the addition is complete, raise the temperature to 85°C and stir for 6 hours. Then stop heating, cool down and discharge the material. Collect the product to obtain functionally modified halloysite.

[0036] The preparation method of supported halloysite nanotubes includes the following steps:

[0037] Step S1: Add 1.8g halloysite nanotubes to N,N-dimethylformamide and disperse evenly. Then add 1.5g succinic anhydride and 0.1g p-toluenesulfonic acid. After the addition is complete, raise the temperature to 100℃ and stir continuously for 5h to obtain modified halloysite nanotubes.

[0038] Step S2: Disperse 1.2g of modified halloysite nanotubes in deionized water, and then continue to add silver nitrate solution with a concentration of 0.1mol / L. After the addition is complete, control the ultrasonic frequency to 100kHz and ultrasonically treat for 2 hours. Then separate the solid material to form the intermediate material.

[0039] Step S3: Mix 50 mL of 0.3 mol / L silver ammonia solution and 30 mL of 0.2 mol / L ascorbic acid solution, stir well, then add 1.5 g of intermediate material. After the addition is complete, control the ultrasonic frequency to 120 kHz and sonicate for 1.5 h. Separate the solid material, wash and vacuum dry it to obtain the supported halloysite nanotubes.

[0040] Example 1

[0041] An antibacterial and antifouling ceramic material, comprising the following raw materials by weight:

[0042] Potassium feldspar 30 parts, sodium feldspar 20 parts, kaolinite 5 parts, sepiolite 3 parts, tourmaline 2 parts, zirconium oxide 1 part, zircon 5 parts, calcium carbonate 10 parts, limestone 2 parts, bauxite 1 part, functional modified halloysite 0.5 parts, sodium carboxymethyl cellulose 1 part, sodium tripolyphosphate 1.5 parts.

[0043] The method for preparing the ceramic material includes the following steps:

[0044] Step 1: Weigh and prepare all the raw materials according to their weight proportions;

[0045] The second step involves adding potassium feldspar, sodium feldspar, kaolin, sepiolite, tourmaline, zircon, calcium carbonate, limestone, bauxite, and functionally modified halloysite into a mixer. After mechanically mixing them evenly, the mixture is transferred to a ball mill and ball-milled until the residue on a 10,000-mesh sieve is less than 0.05%, thus forming the base material.

[0046] The third step involves adding sodium carboxymethyl cellulose and sodium tripolyphosphate to the base material, stirring until evenly mixed, and then continuing to add more, adjusting the specific gravity to 1.6 g / cm³. 3 After standing and defoaming, ceramic materials can be obtained.

[0047] The preparation method for functionally modified halloysite is described in the preparation example, and the same applies to the following examples.

[0048] Example 2

[0049] An antibacterial and antifouling ceramic material, comprising the following raw materials by weight:

[0050] Potassium feldspar 35 parts, sodium feldspar 25 parts, kaolin 10 parts, sepiolite 4 parts, tourmaline 3 parts, zircon 1.5 parts, zircon 6 parts, calcium carbonate 12 parts, limestone 3 parts, bauxite 1.5 parts, functionally modified halloysite 1.2 parts, sodium carboxymethyl cellulose 1.5 parts, sodium tripolyphosphate 2 parts.

[0051] The method for preparing the ceramic material includes the following steps:

[0052] Step 1: Weigh and prepare all the raw materials according to their weight proportions;

[0053] The second step involves adding potassium feldspar, sodium feldspar, kaolin, sepiolite, tourmaline, zircon, calcium carbonate, limestone, bauxite, and functionally modified halloysite into a mixer. After mechanically mixing them evenly, the mixture is transferred to a ball mill and ball-milled until the residue on a 10,000-mesh sieve is less than 0.05%, thus forming the base material.

[0054] The third step involves adding sodium carboxymethyl cellulose and sodium tripolyphosphate to the base material, stirring until evenly mixed, and then continuing to add more, adjusting the specific gravity to 1.6 g / cm³. 3 After standing and defoaming, ceramic materials can be obtained.

[0055] Example 3

[0056] An antibacterial and antifouling ceramic material, comprising the following raw materials by weight:

[0057] Potassium feldspar 45 parts, sodium feldspar 30 parts, kaolin 15 parts, sepiolite 5 parts, tourmaline 4 parts, zircon 2 parts, zircon 10 parts, calcium carbonate 15 parts, limestone 6 parts, bauxite 2 parts, functionally modified halloysite 1.5 parts, sodium carboxymethyl cellulose 2 parts, sodium tripolyphosphate 3 parts.

[0058] The method for preparing the ceramic material includes the following steps:

[0059] Step 1: Weigh and prepare all the raw materials according to their weight proportions;

[0060] The second step involves adding potassium feldspar, sodium feldspar, kaolin, sepiolite, tourmaline, zircon, calcium carbonate, limestone, bauxite, and functionally modified halloysite into a mixer. After mechanically mixing them evenly, the mixture is transferred to a ball mill and ball-milled until the residue on a 10,000-mesh sieve is less than 0.05%, thus forming the base material.

[0061] The third step involves adding sodium carboxymethyl cellulose and sodium tripolyphosphate to the base material, stirring until evenly mixed, and then continuing to add more, adjusting the specific gravity to 1.6 g / cm³. 3 After standing and defoaming, ceramic materials can be obtained.

[0062] Comparative Example 1

[0063] An antibacterial and antifouling ceramic material, comprising the following raw materials by weight:

[0064] Potassium feldspar 35 parts, sodium feldspar 25 parts, kaolinite 10 parts, sepiolite 4 parts, tourmaline 3 parts, zircon 1.5 parts, zircon 6 parts, calcium carbonate 12 parts, limestone 3 parts, bauxite 1.5 parts, supported halloysite nanotubes 1.2 parts, sodium carboxymethyl cellulose 1.5 parts, sodium tripolyphosphate 2 parts.

[0065] The method for preparing the ceramic material includes the following steps:

[0066] Step 1: Weigh and prepare all the raw materials according to their weight proportions;

[0067] The second step involves adding potassium feldspar, sodium feldspar, kaolin, sepiolite, tourmaline, zircon, zircon, calcium carbonate, limestone, bauxite, and supported halloysite nanotubes into a mixer. After mechanically stirring and mixing evenly, the mixture is transferred to a ball mill and ball-milled until the residue on a 10,000-mesh sieve is less than 0.05%, thus forming the base material.

[0068] The third step involves adding sodium carboxymethyl cellulose and sodium tripolyphosphate to the base material, stirring until evenly mixed, and then continuing to add more, adjusting the specific gravity to 1.6 g / cm³. 3 After standing and defoaming, ceramic materials can be obtained.

[0069] The preparation method of the supported halloysite nanotubes is shown in the preparation example.

[0070] Comparative Example 2

[0071] An antibacterial and antifouling ceramic material, comprising the following raw materials by weight:

[0072] Potassium feldspar 35 parts, sodium feldspar 25 parts, kaolin 10 parts, sepiolite 4 parts, tourmaline 3 parts, zircon 1.5 parts, zircon 6 parts, calcium carbonate 12 parts, limestone 3 parts, bauxite 1.5 parts, nano silver 1.2 parts, sodium carboxymethyl cellulose 1.5 parts, sodium tripolyphosphate 2 parts.

[0073] The method for preparing the ceramic material includes the following steps:

[0074] Step 1: Weigh and prepare all the raw materials according to their weight proportions;

[0075] The second step involves adding potassium feldspar, sodium feldspar, kaolin, sepiolite, tourmaline, zircon, zircon, calcium carbonate, limestone, bauxite, and nano silver into a mixer. After mechanically mixing them evenly, the mixture is transferred to a ball mill and ball-milled until the residue on a 10,000-mesh sieve is less than 0.05%, thus forming the base material.

[0076] The third step involves adding sodium carboxymethyl cellulose and sodium tripolyphosphate to the base material, stirring until evenly mixed, and then continuing to add more, adjusting the specific gravity to 1.6 g / cm³. 3 After standing and defoaming, ceramic materials can be obtained.

[0077] Test case

[0078] A circular ceramic blank with a diameter of 10 mm and a thickness of 1 cm was treated in a sintering furnace at 650°C for 3 hours, then removed and immersed in the ceramic materials of the examples and comparative examples, respectively. After three cycles of immersion-removal-immersion, it was placed in a sintering furnace at 1300°C for 9 hours and then removed to form various test pieces for various performance tests.

[0079] a. The water contact angle of the test specimen is tested using a water contact angle measuring instrument to evaluate the antifouling performance of the test specimen;

[0080] b. Add 1 mL of Staphylococcus aureus to the beef broth and incubate at 37°C for 24 hours. Then dilute the culture medium to a concentration of 10. -5 Prepare a bacterial suspension at CFU / mL. Take 0.5 mL of the bacterial suspension and drop it onto the surface of the test piece. Continue to incubate at 37℃ for 4 h. Wash the sample with sterile water after sterilization. Collect the washing liquid. Take 0.5 mL of the washing liquid and place it on the culture medium. Incubate under continuous UV irradiation for 6 h. Observe the colony count and perform a blank control experiment at the same time. Calculate the antibacterial rate using the formula [(number of colonies in the blank group - number of colonies in the experimental group) / number of colonies in the blank group] × 100% to evaluate the antibacterial performance.

[0081] The test results are shown in the table below:

[0082] Table 1 - Test Results

[0083] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Water contact angle / ° 152 154 153 124 125 Antibacterial rate / % 99.9 99.9 99.9 72.1 60.8

[0084] Analysis and testing results show that the ceramic material with added functionally modified halloysite forms a glaze with a water contact angle greater than 150° after sintering, exhibiting excellent anti-fouling and self-cleaning properties, as well as superior antibacterial performance. Replacing the functionally modified halloysite with supported halloysite nanotubes results in the loss of the superhydrophobic effect provided by the silica sol, and the loss of silica sol protection, leading to the loss of the anti-fouling and self-cleaning properties of the glaze. During sintering, silver may undergo slight ablation, and the photocatalytic antibacterial effect of nano-zinc oxide is also lost, resulting in a significant reduction in the antibacterial performance of the glaze.

[0085] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of these embodiments are merely to aid in understanding the method and core ideas of the present invention, including the best mode, and to enable any person skilled in the art to practice the present invention, including manufacturing and using any device or system, and implementing any combined method. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims. The scope of protection of this patent is defined by the claims and may include other embodiments that can be conceived by those skilled in the art. If these other embodiments have structural elements similar to those expressed in the claims, or if they include equivalent structural elements that are not substantially different from those expressed in the claims, then these other embodiments should also be included within the scope of the claims.

[0086] 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 will 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.

Claims

1. An antibacterial and antifouling ceramic material, characterized in that, By weight, it includes the following ingredients: Potassium feldspar 30-45 parts, sodium feldspar 20-30 parts, kaolinite 5-15 parts, sepiolite 3-5 parts, tourmaline 2-4 parts, zircon 1-2 parts, zircon 5-10 parts, calcium carbonate 10-15 parts, limestone 2-6 parts, bauxite 1-2 parts, functionally modified halloysite 0.5-1.5 parts, sodium carboxymethyl cellulose 1-2 parts, sodium tripolyphosphate 1.5-3 parts; The preparation method of the functionally modified halloysite includes the following steps: Step 1: Add supported halloysite nanotubes to deionized water and stir to disperse evenly to form dispersion A; add nano zinc oxide to deionized water and ultrasonically disperse evenly to form dispersion B; add N,N'-bis(2-hydroxyethyl)-N,N'-bis(trimethoxysilylpropyl)ethylenediamine to anhydrous ethanol and stir to mix evenly to prepare a mixture. Step 2: Mix dispersion A and dispersion B to form a precursor solution. Then add the mixture to the precursor solution. After the addition is complete, adjust the pH to 4-5. Next, raise the temperature to 60-70℃ and stir for 2-4 hours. Then add silica sol. After the addition is complete, raise the temperature to 80-90℃ and stir for 4-8 hours. Then stop heating, cool down and discharge the material. Collect the product to obtain functional modified halloysite. The supported halloysite nanotubes are silver-supported halloysite nanotubes.

2. The antibacterial and antifouling ceramic material according to claim 1, characterized in that, In step one, the preparation method of the supported halloysite nanotubes includes the following steps: Step S1: Add halloysite nanotubes to N,N-dimethylformamide and disperse evenly. Then, add anhydride modifier and p-toluenesulfonic acid. After the addition is complete, raise the temperature to 90-100℃ and stir continuously for 4-6 hours to obtain modified halloysite nanotubes. Step S2: Disperse the modified halloysite nanotubes in deionized water, and then continue to add silver nitrate solution with a concentration of 0.1-0.2 mol / L. After the addition is complete, control the ultrasonic frequency to 80-100 kHz and ultrasonically treat for 2-3 hours. Then separate the solid material to form the intermediate material. Step S3: Mix the silver ammonia solution and ascorbic acid solution and stir evenly. Then add the intermediate material. After the addition is complete, control the ultrasonic frequency to 100-120kHz and sonicate for 1-2 hours. Separate the solid material, wash and vacuum dry it to obtain the supported halloysite nanotubes.

3. The antibacterial and antifouling ceramic material according to claim 2, characterized in that, In step S1, the anhydride modifier is any one of succinic anhydride, maleic anhydride, or glutaric anhydride.

4. The antibacterial and antifouling ceramic material according to claim 2, characterized in that, In step S3, the concentration of the silver ammonia solution is 0.2-0.3 mol / L; the concentration of the ascorbic acid solution is 0.1-0.2 mol / L.

5. The antibacterial and antifouling ceramic material according to claim 1, characterized in that, In step one, the mass fraction of dispersion A is 10-20%.

6. The antibacterial and antifouling ceramic material according to claim 1, characterized in that, In step one, the mass fraction of dispersion B is 5-10%.

7. The antibacterial and antifouling ceramic material according to claim 1, characterized in that, In step one, the mass fraction of the mixture is 1-2%.

8. The antibacterial and antifouling ceramic material according to claim 1, characterized in that, In step two, the volume ratio of the precursor solution to the mixture is 3-5:

1.

9. A method for preparing the antibacterial and antifouling ceramic material as described in claim 1, characterized in that, Includes the following steps: Step 1: Weigh and prepare all the raw materials according to their weight proportions; The second step involves adding potassium feldspar, sodium feldspar, kaolin, sepiolite, tourmaline, zircon, zircon, calcium carbonate, limestone, bauxite, and functionally modified halloysite into a mixer. After mechanically mixing them evenly, the mixture is transferred to a ball mill and ball-milled until the residue on a 10,000-mesh sieve is less than 0.05%, thus forming the base material. The third step involves adding sodium carboxymethyl cellulose and sodium tripolyphosphate to the base material, stirring until evenly mixed, and then continuing to add more, adjusting the specific gravity to 1.5-1.65 g / cm³. 3 After standing and defoaming, ceramic materials can be obtained.