CN-118125863-B - Preparation method of ceramic surface composite antibacterial toxin-reducing coating

CN118125863BCN 118125863 BCN118125863 BCN 118125863BCN-118125863-B

Abstract

The invention belongs to the technical field of antibacterial coatings, and in particular relates to a preparation method of a ceramic surface composite antibacterial toxin-reducing coating, which comprises the following steps of S1, coating gold water on the surface of a sintered ceramic, and annealing to prepare a transition layer; S2, preparing a silver plating antibacterial layer on the surface of the ceramic with the formed transition layer through vacuum evaporation, S3, preparing a titanium plating protective layer on the surface of the ceramic with the formed silver plating antibacterial layer through vacuum evaporation, and S4, carrying out vacuum annealing on the ceramic with the formed titanium plating protective layer to obtain a finished product. The composite antibacterial toxin-reducing coating on the surface of the ceramic prepared by the invention has good antibacterial performance, the antibacterial rate can reach 99.99 percent, and the antibacterial performance requirement of the ceramic is met. And secondly, the composite antibacterial toxicity-reducing coating on the ceramic surface prepared by the invention can also effectively reduce cyanide in solutions such as white spirit and the like, and meets the requirement of toxicity-reducing performance of ceramic. In addition, the composite antibacterial toxin-reducing coating on the ceramic surface prepared by the method has the precious metal ceramic decoration effect, so that the ceramic surface is smoother, has luster and improves the ceramic quality.

Inventors

LI SHILIN
LING YUNHAN
CHEN CHENG
LIN YING
Mai Shengyong

Assignees

广西三环高科拉曼芯片技术有限公司
清华大学

Dates

Publication Date: 20260505
Application Date: 20240219

Claims (5)

1. The preparation method of the ceramic surface composite antibacterial toxin-reducing coating is characterized by comprising the following steps of: S1, coating gold water on the surface of the fired ceramic, and annealing to prepare a transition layer; S2, preparing a silver nano-plating antibacterial layer with the thickness of 50-3000nm on the ceramic surface on which the transition layer is formed through vacuum evaporation; s3, preparing a nano titanium plating protective layer with the thickness of 10-300nm on the surface of the silver plating antibacterial layer through vacuum evaporation; s4, carrying out vacuum annealing on the ceramic with the titanized protective layer to obtain a finished product, wherein, In the step S1, the annealing temperature is 500-900 ℃ and the annealing time is 40-100min; In the step S4, the annealing temperature is 250-400 ℃ and the annealing time is 0.5-3h.
2. The preparation method of the ceramic surface composite antibacterial toxin-reducing coating according to claim 1, wherein in the step S2, metal silver is adopted as a target material, a chamber of an electron beam evaporation coating machine is vacuumized to 2X 10 -4 Pa-2×10 -5 Pa at room temperature, the rotation speed of a sample stage is 1-20r/min, the deposition speed of the metal gold is 0.1-10A/S, and nano silver with the thickness of 50-3000nm is deposited on the surface of a transition layer.
3. The preparation method of the ceramic surface composite antibacterial and toxicity-reducing coating according to claim 1, wherein in the step S3, metal titanium is adopted as a target, a chamber of an electron beam evaporation coating machine is vacuumized to 2X 10 -4 Pa-2×10 -5 Pa at room temperature, the rotation speed of a sample stage is 1-20r/min, the deposition speed of the metal gold is 0.1-10A/S, and nano titanium with the thickness of 10-300nm is deposited on the surface of a silver-plated antibacterial layer.
4. The method for preparing the composite antibacterial and toxicity-reducing coating for the ceramic surface according to claim 1, wherein the composite antibacterial and toxicity-reducing coating for the ceramic surface is used for toxicity reduction and bacteria resistance.
5. A ceramic surface composite antibacterial and toxicity-reducing coating, which is characterized by being prepared by the preparation method of the ceramic surface composite antibacterial and toxicity-reducing coating in any one of claims 1-4.

Description

Preparation method of ceramic surface composite antibacterial toxin-reducing coating Technical Field The invention belongs to the technical field of antibacterial coatings, and particularly relates to a preparation method of a ceramic surface composite antibacterial toxin-reducing coating. Background Along with the improvement of living standard, the health consciousness of people is gradually improved, and antibacterial materials are generated. The demand of ceramic products with antibacterial function is also increasing, most ceramic products with antibacterial function adopt the technical proposal of adding antibacterial agent into glaze, and the antibacterial effect is poor because most antibacterial agent is not concentrated on the surface of ceramic products. In order to improve the antibacterial effect, the other technical scheme is to cover an antibacterial layer on the surface of the ceramic product, the scheme generally uses nano silver particles as antibacterial active substances, the nano silver is limited by a coating process in the coating process, the nano silver has lower binding force with a substrate and is easy to fall off, the antibacterial performance is further influenced, and in addition, the antibacterial coating has the problems that the antibacterial agent is easy to oxidize and inactivate, the silver is dissolved out excessively to harm the human body and the antibacterial duration is short. Therefore, how to prepare a ceramic antibacterial coating with excellent antibacterial activity and long service life and effectively controlling silver dissolution has important significance for the development of ceramic antibacterial materials. The inventor discovers that the existing ceramic surface antibacterial method has the problems of low antibacterial activity, short service life, incapability of meeting the actual use requirements, no decorative effect and incapability of large-scale popularization. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. Disclosure of Invention The invention aims to provide a preparation method of a ceramic surface composite antibacterial toxin-reducing coating. In order to achieve the above purpose, the present invention provides the following technical solutions: the preparation method of the composite antibacterial toxin-reducing coating on the surface of the ceramic comprises the following steps: s1, coating gold water on the surface of fired ceramic, and annealing to prepare a transition layer; S2, preparing a silver-plated antibacterial layer on the ceramic surface on which the transition layer is formed through vacuum evaporation; s3, preparing a titanium plating protective layer on the surface of the silver plating antibacterial layer through vacuum evaporation; s4, carrying out vacuum annealing on the ceramic with the titanized protective layer to obtain a finished product. Preferably, in step S1, the annealing temperature is 500-900 ℃ and the annealing time is 40-100min. Preferably, in the step S2, metallic silver is adopted as a target material, a chamber of an electron beam evaporation coating machine is vacuumized to 2X 10 -4Pa-2×10-5 Pa at room temperature, the rotation speed of a sample stage is 1-20r/min, the deposition speed of metallic gold is 0.1-10A/S, and nano silver with the thickness of 50-3000nm is deposited on the surface of a ceramic common gold-plating layer. Preferably, in the step S3, metallic titanium is adopted as a target material, the chamber of the electron beam evaporation coating machine is vacuumized to 2X 10 -4Pa-2×10-5 Pa at room temperature, the rotation speed of a sample stage is 1-20r/min, the deposition speed of metallic gold is 0.1-10A/S, and nano titanium with the thickness of 10-300nm is deposited on the surface of the ceramic common gold plating layer. Preferably, in step S4, the annealing temperature is 250-400 ℃ and the annealing time is 0.5-3h. Preferably, the ceramic surface composite antibacterial toxin-reducing coating is used for reducing toxin, resisting bacteria and reducing cyanide in a solution. The invention also provides a ceramic surface composite antibacterial and toxin-reducing coating, which is prepared by the preparation method of the ceramic surface composite antibacterial and toxin-reducing coating. Compared with the prior art, the invention has the following beneficial effects: (1) The composite antibacterial and toxicity-reducing ceramic surface coating prepared by the invention comprises a transition layer, a silver-plated antibacterial layer and a titanium-plated protective layer, wherein the transition layer is connected with the substrate and the silver-plated antibacterial layer, so that the difference of expansion coefficients be