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CN-122010527-A - Ceramic-based antibacterial slow-release ball and preparation method thereof

CN122010527ACN 122010527 ACN122010527 ACN 122010527ACN-122010527-A

Abstract

The invention provides a ceramic-based antibacterial slow-release ball and a preparation method thereof, wherein the antibacterial slow-release ball is formed by sintering the following raw materials, by mass, 78-85.5% of a ceramic matrix, 10-15% of a pore structure regulator, 1.5-3.6% of an antibacterial active component and 2-3% of an auxiliary functional component, and the pore structure regulator is used for forming a multistage pore structure in the sintering process and controlling the release rate of the antibacterial active component. The invention constructs a stable three-dimensional network skeleton through a ceramic matrix, adopts sectional sintering in the sintering process, firstly forms a multi-stage pore canal structure, then forms a stable porous ceramic skeleton through sintering and solidification, and firmly fixes antibacterial components such as silver-loaded zeolite and the like in the skeleton and in the pore canal. Under the water soaking environment, silver ions are slowly and controllably released through the micro-channels, short-term failure caused by explosive release is avoided, and a continuous antibacterial effect for a plurality of months can be realized.

Inventors

  • LIU ZEWEI
  • ZENG XIPING
  • YU DONGXU

Assignees

  • 深圳市华科创智技术股份有限公司

Dates

Publication Date
20260512
Application Date
20260109

Claims (9)

  1. 1. The ceramic-based antibacterial slow-release ball is characterized by being formed by sintering, by mass, 78-85.5% of a ceramic matrix, 10-15% of a pore structure regulator, 1.5-3.6% of an antibacterial active component and 2-3% of an auxiliary functional component; the pore structure regulator is used for forming a multistage pore structure in the sintering process and controlling the release rate of the antibacterial active component.
  2. 2. A ceramic-based antimicrobial slow release ball according to claim 1, wherein the ceramic matrix comprises kaolin, aluminum silicate and aluminum oxide; The ceramic-based antibacterial slow-release ball comprises, by mass, 30-40% of kaolin, 15-25% of aluminum silicate and 5-10% of aluminum oxide.
  3. 3. The ceramic-based antibacterial slow release ball according to claim 1, wherein the pore structure regulator comprises natural polymer, calcium carbonate and porous silicate; The ceramic-based antibacterial slow-release ball comprises, by mass, 100% of a ceramic-based antibacterial slow-release ball, 5-8% of natural polymer, 3-5% of calcium carbonate and 2-4% of porous silicate.
  4. 4. The ceramic-based antibacterial sustained-release pellet of claim 1, wherein the antibacterial active ingredient comprises silver-loaded zeolite and nano silver; the silver-loaded zeolite is used in an amount of 0.5-1.5% and the nano silver is used in an amount of 0-0.5% based on 100% of the ceramic-based antibacterial slow release ball.
  5. 5. The ceramic-based antibacterial slow-release ball of claim 1, wherein the auxiliary functional components comprise medical stone and burning-resistant activated carbon; The mass of the ceramic-based antibacterial slow release ball is 100%, the amount of the medical stone is 1-3%, and the amount of the burn-resistant activated carbon is 0-1%.
  6. 6. The ceramic-based antibacterial sustained-release ball according to any one of claims 1 to 5, wherein the particle size of the ceramic-based antibacterial sustained-release ball is 3 to 4mm.
  7. 7. A method for preparing the ceramic-based antibacterial sustained-release ball according to any one of claims 1 to 6, comprising the following steps: Step 1) raw material mixing and fine grinding, namely placing a ceramic matrix, a pore structure regulating agent, an antibacterial active component and an auxiliary functional component in a formula amount into a ball mill, uniformly mixing, and controlling the particle size D50 of the mixed powder to be less than or equal to 15 mu m; Step 2) forming and granulating, namely adding water into the powder, uniformly mixing in a pugging machine, granulating by a granulator, and controlling the particle size of the granules to be within a range of 3-4 mm; step 3) sectional sintering, namely placing the formed green body particles into a sintering furnace for sectional sintering; and 4) cooling and post-treatment, namely cooling to room temperature along with a furnace to obtain the ceramic-based antibacterial slow-release ball.
  8. 8. The method for preparing ceramic-based antibacterial slow-release balls according to claim 7, wherein the step 3) comprises the following specific steps: The first stage, namely raising the temperature from room temperature to 450-550 ℃ at the temperature raising rate of 3-5 ℃ per minute, and preserving the heat for 30-60 minutes to fully decompose and volatilize the pore structure regulator to form an initial pore channel; And in the second stage, continuously rising the temperature to 900-1050 ℃ at the temperature rising rate of 2-4 ℃ per minute, and preserving the heat for 60-120 minutes to enable the ceramic matrix to be fully sintered and solidified to form a stable porous ceramic skeleton, and stably fixing the antibacterial active component in the porous ceramic skeleton.
  9. 9. The method for preparing ceramic-based antibacterial slow-release balls according to claim 7, wherein the water in the step 2) is 15-20% of the powder in mass.

Description

Ceramic-based antibacterial slow-release ball and preparation method thereof Technical Field The invention belongs to the technical field of antibacterial materials, and particularly relates to a ceramic-based antibacterial slow-release ball and a preparation method thereof, which are particularly suitable for clean water tanks and sewage tanks of intelligent cleaning equipment such as a sweeping robot, a mopping robot and the like. Background With the popularization of smart home, devices such as a sweeping robot, a mopping robot and the like have become an indispensable cleaning tool for modern families. Such devices are usually equipped with clean water tanks and sewage tanks, the interior of which is in a humid environment for a long period of time, and which are extremely prone to the growth of microorganisms such as bacteria, mold, etc. The propagation of microorganisms not only can generate peculiar smell and influence the household environment, but also can cause water tank pollution and even secondary pollution to the cleaned ground, thereby forming a potential threat to the health of users. Currently, common solutions include the addition of liquid antimicrobial agents or the use of ultraviolet sterilization modules. However, the liquid antibacterial agent is discharged when changing water each time, long-acting antibacterial cannot be realized, frequent addition is needed, user experience is poor, and the ultraviolet sterilization module has the problems of high cost, high energy consumption, limited sterilization effect on dead corners of the water tank and the like. Research has been devoted to the formation of solid particles of inorganic antimicrobial materials and their placement in a static aqueous environment for antimicrobial efficacy evaluation in an effort to develop continuous purification techniques. For example, patent CN 116918831A discloses a silver-loaded antibacterial slow-release material, but the skeleton of the material mainly consists of silicon dioxide and quartz, and silver element exists in the form of silver oxide and metallic silver, so that the release rate and the long-acting performance of the material still have room for optimization. Patent CN202410769129a focuses on organic/inorganic composite antibacterial deodorant particles, and slow release is achieved through polymer coating, but structural stability under long-term soaking and performance stability in complex water quality (such as containing detergent residues) are to be studied. Therefore, the development of the antibacterial slow-release product which has long-acting antibacterial effect, stable structure, safety and harmlessness and is suitable for the water tank of the cleaning equipment has important practical significance. Disclosure of Invention The invention aims to provide a ceramic-based antibacterial slow-release ball, which solves the technical problems in the prior art. The ceramic-based antibacterial slow-release ball is formed by sintering the following raw materials, by mass, 78-85.5% of a ceramic matrix, 10-15% of a pore structure regulator, 1.5-3.6% of an antibacterial active component and 2-3% of an auxiliary functional component; the pore structure regulator is used for forming a multistage pore structure in the sintering process and controlling the release rate of the antibacterial active component. The slow release ball takes ceramic as a matrix, and realizes the controllable and slow release of silver ions by forming a multistage pore canal structure and loading antibacterial components in the sintering process, thereby achieving the long-acting antibacterial effect. Further, the ceramic matrix comprises kaolin, aluminum silicate and aluminum oxide; The ceramic-based antibacterial slow-release ball comprises, by mass, 30-40% of kaolin, 15-25% of aluminum silicate and 5-10% of aluminum oxide. The ceramic matrix is used as the main body of the slow release ball, forms a stable three-dimensional network skeleton after high-temperature sintering, provides main mechanical strength for the product, and is used as a carrier for loading other functional components. The total content is the basis for ensuring the structural strength of the product. Further, the pore structure regulator comprises natural polymers, calcium carbonate and porous silicate; The ceramic-based antibacterial slow-release ball comprises, by mass, 100% of a ceramic-based antibacterial slow-release ball, 5-8% of natural polymer, 3-5% of calcium carbonate and 2-4% of porous silicate. In some embodiments, the natural polymer is starch or cellulose. Starch/cellulose decomposition to form macropores, calcium carbonate decomposition to form microscale tunnels, and porous silicate to provide nanoscale intrinsic porosity. The three are cooperated to control the release rate of silver ions. Further, the antibacterial active ingredient comprises silver-loaded zeolite and nano silver; the silver-loaded zeolite is used in an amount o