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Method for constructing micro-nano structure with antibacterial function on surface of metal substrate

A metal substrate, micro-nano structure technology, applied in the direction of metal material coating process, nanotechnology, liquid chemical plating, etc., can solve the problems of reduced antibacterial performance, poor antifungal performance, affecting long-term performance, etc., and achieves regularity. High, evenly distributed, efficient bactericidal properties

Inactive Publication Date: 2017-12-19
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The former mainly includes Cu 2+ 、Ag + and Zn 2+ , where Ag + The antibacterial performance is the best, but its antifungal performance is poor, it is easy to change color during use, and there may be risks to human health and biological safety; in addition, with the continuous release of ions, the antibacterial performance of this type of coating will decrease. Decrease gradually to affect long-term effect
Photocatalytic antibacterial coatings can exert antibacterial properties under the condition of light source, but the antibacterial performance is greatly reduced in the absence of light

Method used

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  • Method for constructing micro-nano structure with antibacterial function on surface of metal substrate
  • Method for constructing micro-nano structure with antibacterial function on surface of metal substrate
  • Method for constructing micro-nano structure with antibacterial function on surface of metal substrate

Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] The preparation process of the antibacterial functionalized coating on the bottom surface of the stainless steel plate base includes the following steps:

[0025] A. Preparation of ZnO seed crystal layer: cut austenitic 304 stainless steel plate into 5cm×5cm size, immerse the sample in acetone, deionized water and absolute ethanol in turn, ultrasonically clean for 10min, then dry, anneal at 250 ℃ and cool, Subsequently, a zinc acetate ethanol solution was prepared, and the stainless steel plate was immersed in the zinc acetate ethanol (10 mmol / L) solution for 4 minutes, and then the liquid surface was pulled out at a constant speed of 5 cm / min, and dried in an oven at 70 °C for 5 minutes. Put it into a muffle furnace for annealing at 300°C for 1 h, and after cooling, a stainless steel plate with ZnO nanocrystals evenly distributed on the surface is obtained.

[0026] B. Hydrothermal synthesis of ZnO arrays: respectively prepare deionized aqueous solutions of equal volum...

Embodiment 2

[0029] The preparation process of the antibacterial functionalized coating on the surface of the stainless steel plate base includes the following steps:

[0030] A. Preparation of ZnO seed crystal layer: cut austenitic 304 stainless steel plate into a size of 5cm×5cm, immerse the sample in acetone, deionized water and absolute ethanol in turn, ultrasonically clean for 10min, then dry, anneal at 400 ℃ and cool, Subsequently, a zinc acetate ethanol solution was prepared, and 2.5 vol% deionized water was added. After mixing evenly, the stainless steel plate was immersed in the zinc acetate ethanol (40 mmol / L) solution for 4 min, and then the liquid surface was pulled out at a uniform speed of 7 cm / min. Place in a 50°C oven to dry for 5 minutes, then put the steel sheet into a muffle furnace for 400°C annealing for 5 minutes, and then perform the pull-up annealing process again. A stainless steel plate with ZnO nanocrystals evenly distributed on the surface is obtained.

[0031]...

Embodiment 3

[0033] The preparation process of the antibacterial functionalized coating on the surface of the aluminum alloy plate base includes the following steps:

[0034]A. Preparation of ZnO seed crystal layer: The aluminum alloy plate was cut into a size of 5cm×5cm, the sample was immersed in acetone, deionized water and anhydrous ethanol in turn, ultrasonically cleaned for 10min, dried, annealed at 400 °C and cooled, and then prepared with acetic acid Zinc ethanol solution and 0.5vol% deionized water were added to make the final concentration 50mmol / L. After mixing evenly, the aluminum alloy plate was immersed in the zinc acetate ethanol solution for 1min, and then pulled out of the liquid surface at a uniform speed of 2cm / min. And placed in a 50 ℃ oven to dry for 5 minutes, and then the aluminum alloy plate was placed in a muffle furnace at 450 ℃ for 5 minutes annealing and then cooled. After the sample was cooled, the pull-up annealing process was performed again. After 4 cycles o...

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Abstract

The invention discloses a method for constructing a micro-nano structure with an antibacterial function on the surface of a metal substrate. The method comprises the following steps: carrying out technologies of metal surface cleaning, annealing heat treatment, lifting and drawing to prepare a ZnO seed crystal layer and hydrothermal growth of a nano array for surface treatment, and finally obtaining a metal plate target product with a ZnO nano array. The ZnO array prepared by the method has a large number of nanoscale tip array structures, the array density can reach 1*10 <7>-1*10 <9> pieces / cm <2>, and the tip diameter of nanorods forming the array ranges from 30 nm to 150 nm. The surface of the array can rapidly sterilize bacteria by making contact with bacterial strains, the surface bacteria can be killed within 1 minute, the sterilizing rate for the escherichia coli (ATCC 25922) and the staphylococcus aureus (ATCC 6538) can reach more than 99.99%, and the surface of the array has a rapid broad-spectrum bactericidal performance.

Description

technical field [0001] The invention relates to a metal surface micro-nano functional structure, in particular to the technical field of antibacterial functionalization treatment and micro-nano structure construction on the surface of metal materials. Background technique [0002] Metal substrates such as stainless steel, aluminum and titanium alloys are widely used in industrial production and life. The surface is easily contaminated by bacteria. The adhesion and adhesion behavior of bacteria on the surface of metal substrates will greatly affect the number of bacteria on the surface of the bacteria. When the number of bacteria When it is higher, it will threaten human health, therefore, the antibacterial treatment of metal substrate surface is in great demand in various fields. The traditional antibacterial treatment method for the surface of metal substrates is to coat the surface of the substrate with antibacterial materials to form a coating with antibacterial propertie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/12B82Y40/00
CPCC23C18/1216B82Y40/00C23C18/1241
Inventor 周祚万谢远徐晓玲王立孟凡彬姜曼王泽永
Owner SOUTHWEST JIAOTONG UNIV
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