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Preparation method of coated antibacterial ceramics and coated antibacterial ceramics

A technology of antibacterial ceramics and ceramics, applied in the preparation of coated antibacterial ceramics and the field of coated antibacterial ceramics, can solve the problems of high production equipment, harsh production conditions, and difficult to achieve, and achieves a wide range of applicable materials, low operating equipment costs, and easy industrialization. The effect of promotion

Inactive Publication Date: 2019-01-29
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing technology has high production equipment, difficult production conditions and poor quality of antibacterial ceramics produced, and TiO 2 Disadvantages such as poor bonding force between antibacterial film and ceramics

Method used

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  • Preparation method of coated antibacterial ceramics and coated antibacterial ceramics
  • Preparation method of coated antibacterial ceramics and coated antibacterial ceramics
  • Preparation method of coated antibacterial ceramics and coated antibacterial ceramics

Examples

Experimental program
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preparation example Construction

[0057] In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings. The ultrasonic spray pyrolysis method is characterized by fine atomized particles, deep and uniform coating, and has the advantages of low price and high controllability, and can be used in industrial production. The present invention proposes a kind of preparation method of coating antibacterial ceramics, it comprises the following steps:

[0058] S1. Preparation of doped modified sol: adding soluble titanate, surfactant, and at least one metal ion compound for doping to the solvent, and in the presence of a chelating agent, to prepare a doped modified sol;

[0059] S2. Spray the doped modified sol onto the ceramic surface: spray the doped modified sol prepared in step S1 onto the ceramic surface by an ultrasonic spraying method to form a uniform and dense doped...

Embodiment 1

[0072] S1. Measure 10 mL of tetrabutyl titanate into a pear-shaped funnel at room temperature, slowly add it to 70 mL of absolute ethanol, stir for 30 min, and mix well to form solution A;

[0073] Add 4mL of glacial acetic acid into 70mL of absolute ethanol, add 0.001mol of cobalt nitrate, and add 0.25g of sodium dodecylbenzenesulfonate as a surfactant, and stir until the powder is evenly dissolved to form solution B;

[0074] Slowly titrate solution A into solution B, and stir for 30 min after the dropwise addition to obtain a sol.

[0075] S2. Put the tiles into deionized water, absolute ethanol, and acetone and clean them in an ultrasonic cleaner for 30 minutes each, and dry them with absorbent cotton for later use;

[0076] Pour the sol into the ultrasonic spray pyrolysis device, and place the pretreated ceramic tile sample on the ceramic substrate substrate on the heating device, and the substrate temperature is controlled at about 60°C;

[0077] Spray the coating for 4...

Embodiment 2-6

[0080] Similar to the steps of Example 1, Examples 2-6 are realized only by adjusting the type and doping amount of the metal ion compound in Step S1, and the other conditions remain unchanged. Specifically, the doping amount of cobalt nitrate in Examples 2, 3, 4, 5, and 6 is 0.002mol, 0.004mol, 0.006mol, 0.008mol, 0.01mol,

[0081] In conjunction with Examples 1-6, XRD, UV-Vis-DRS, FT-IR and other tests were carried out on the nanomaterials of the cobalt-doped titania sol prepared in Examples 1-6, and the test results are as follows: Figure 2-4 shown. Cobalt-doped titania sol nanomaterials prepared by the sol-gel method in Examples 1-6 were tested for the antibacterial performance of Escherichia coli by the shaking flask method and the antibacterial ring method, and the test results are as follows Figure 5 , 6 shown.

[0082] combine Figure 2-6 , the specific analysis is as follows: figure 2 a-f show the XRD analysis patterns of cobalt-doped titania sol nanomaterials...

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Abstract

The invention provides a preparation method of coated antibacterial ceramics. A self-made ultrasonic spraying device is used to evenly densely coat a pre-treated ceramic tile sample sheet with a sol.An industrial atomizing head is utilized to atomize the sol into fine droplet particles under action of ultrasonic waves and the droplet particles are mixed with gas to form an aerosol. Under the action of air pump pressure, the fine droplet particles are transported to a reaction chamber to form a thin film which is used to coat the ceramic sheet, and further pyrolysis is carried tou to form a film. The antibacterial activities of the coated antibacterial ceramics on Escherichia coli (ATCC 25922), Staphylococcus aureus (ATCC 6538) and Candida albicans (ATCC 10231) are studied, the doping amount and the doping molar ratio of metal ions doped TiO2 nano-material sol during a preparation process, the kinds of surfactants and the coating height, the coating number, the coating time and the baking temperature of the antibacterial ceramics in the preparation process are changed according to the sample conditions.

Description

technical field [0001] The invention relates to the field of novel materials, in particular to a method for preparing a coated antibacterial ceramic and the coated antibacterial ceramic. Background technique [0002] TiO 2 As a photocatalyst, it has the advantages of non-toxic, harmless, low cost, stable chemical properties, high photocatalytic activity, and antibacterial. 2 The antibacterial ceramics are prepared by covering the surface of the ceramics with a thin film. But TiO 2 Not without disadvantages, due to its wide band gap (3.0eV-3.2eV), it can only absorb ultraviolet light, which only accounts for 4% of sunlight, and TiO 2 After being irradiated by near-ultraviolet light, the quantum yield is low, the highest not exceeding 10%. At the same time, the recombination rate of electrons and holes generated by the excitation is relatively high. These factors greatly limit the TiO 2 photocatalytic efficiency. To solve these problems, TiO 2 Doping modification is car...

Claims

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Application Information

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IPC IPC(8): C04B41/87
CPCC04B41/5041C04B41/87C04B41/5009C04B41/4543C04B41/0072
Inventor 时代杨合薛向欣沈艳珍薛菲
Owner NORTHEASTERN UNIV
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