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Preparation method and application of titanium dioxide antibacterial and anti-adhesion composite surface

A titanium dioxide, composite surface technology, applied in surface reaction electrolytic coating, botanical equipment and method, device for coating liquid on surface, etc., can solve problems such as energy consumption, inconvenience of use, visible light excitation, etc., and achieve easy industrialization , high-efficiency solar photocatalytic sterilization performance, high anti-bacterial adhesion rate

Pending Publication Date: 2022-07-22
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However TiO 2 There are also limitations in the actual use of materials, because TiO 2 With a large band gap (3.2eV), it can only be excited by ultraviolet light and cannot be excited by visible light
If additional UV light irradiation needs to be equipped with suitable lighting equipment, it is extremely inconvenient to use and causes a lot of energy consumption

Method used

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  • Preparation method and application of titanium dioxide antibacterial and anti-adhesion composite surface
  • Preparation method and application of titanium dioxide antibacterial and anti-adhesion composite surface
  • Preparation method and application of titanium dioxide antibacterial and anti-adhesion composite surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The preparation method of the titanium dioxide antibacterial and anti-adhesion composite surface provided by this embodiment includes the following steps:

[0040] S1: Select a titanium plate as the base, its thickness is 0.3mm, and process it by chemical polishing method;

[0041] S2: Using anodizing technology, a layer of porous titanium dioxide nanotube arrays are etched on the titanium substrate through the electrolyte;

[0042] Among them, the electrolyte used in the anodic oxidation method is a mixed solution of ammonium fluoride / water / ethylene glycol system, with ethylene glycol as the solvent, the mass fraction of ammonium fluoride is 0.2M, and the volume fraction of water is 5%; The oxidation voltage is 40V, and the anodic oxidation time is 2h;

[0043] S3: calcining the surface of the obtained titanium dioxide nanotube array at 500 °C for 5 h to obtain anatase titanium dioxide;

[0044] S4: The surface of the TiO2 nanotube array is immersed in sequence at a ...

Embodiment 2

[0050] The preparation method and application of the titanium dioxide antibacterial and anti-adhesion composite surface provided in this embodiment are basically the same as those in Example 1, except that the preparation method includes the following steps:

[0051] The concentration of silver nitrate solution in step S3 is 5mmol·L -1 , and the concentration of the hydrochloric acid solution is 10 mmol·L -1 .

Embodiment 3

[0053]The preparation method and application of the titanium dioxide antibacterial and anti-adhesion composite surface provided in this embodiment are basically the same as those in Embodiments 1 and 2. The difference is that the preparation method includes the following steps:

[0054] The concentration of silver nitrate solution in step S3 is 10mmol·L -1 , and the concentration of the hydrochloric acid solution is 20 mmol·L -1 .

[0055] Application and experimental verification examples

[0056] 1. Characterization of the physical structure, chemical composition and properties of the surface

[0057] (1) The surface morphology and chemical composition of the antibacterial and anti-adhesion composite surface prepared in Example 3 were characterized by SEM and XPS;

[0058] (2) SEM-EDX test was carried out on the antibacterial and anti-adhesion composite surface prepared in Example 3;

[0059] (3) the silver ion release rate of the antibacterial and anti-adhesion composit...

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Abstract

The invention discloses a preparation method of a titanium dioxide antibacterial and anti-adhesion composite surface. The preparation method comprises the following steps: S1, selecting a titanium plate as a substrate; s2, an anodic oxidation technology is adopted, and a layer of porous titanium dioxide nanotube array is etched on the titanium substrate through electrolyte; s3, calcining the surface of the obtained titanium dioxide nanotube array at 500 DEG C for 5 hours to obtain anatase type titanium dioxide; and S4, enhancing the absorption of titanium dioxide in a visible light wave band, realizing sunlight photocatalytic antibiosis, and depositing a layer of AgCl nanoparticles on the surface of the titanium dioxide nanotube array through a continuous ion layer adsorption reaction. The material surface provided by the technical scheme of the invention has efficient sunlight catalytic sterilization performance, has extremely high bacterial adhesion prevention rate, can be widely applied to the fields of biomedical treatment, food processing equipment, marine antifouling, ships, aerospace and the like, and provides a new thought for solving the bacterial adhesion prevention problem of the titanium alloy material surface.

Description

technical field [0001] The invention relates to the technical field of chemical materials, in particular to a preparation method and application of a titanium dioxide antibacterial and anti-adhesion composite surface. Background technique [0002] Titanium alloy has the characteristics of high strength, high corrosion resistance, high heat resistance, good biocompatibility, etc. It is widely used in aerospace, marine ships, biomedical and other high-tech fields. It is also known as "space metal". ", "Ocean Metal" reputation. However, bacteria adhering to the surface of titanium metal will grow and multiply on the surface, forming a very harmful biofilm. Biofilms can accelerate or directly lead to the corrosion of titanium alloys through metabolic activities, resulting in the failure of titanium metal devices and causing great economic losses. Bacteria adhering to the surface of titanium metal medical devices is the most important factor for postoperative infection, which p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F17/00C25D11/26C23C18/08C23C18/14B05D5/00B05D7/24A01N59/16A01P1/00
CPCC23F17/00C25D11/26C23C18/08C23C18/143B05D5/00B05D7/24A01N59/16B05D2506/10
Inventor 桂黎爽林璟刘自力左建良杨伟陈雅卢汉卿华子浛胡杰涛王宇飞刘俊江江文峰刘健伟叶婉仪王思桃封天雨李树立
Owner GUANGZHOU UNIVERSITY