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A kind of sterilization method of cold spray electrothermal coating

A cold spraying and coating technology, applied in the direction of heating, pressure inorganic powder coating, etc., can solve the problems of high oxidation rate, poor thermal and electrical conductivity, high porosity of the coating, etc., and achieve the effect of high-efficiency antibacterial and pollution avoidance

Active Publication Date: 2021-06-22
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the electrothermal antibacterial coating uses a thermal spraying process. In order to improve the conductivity of the electrothermal antibacterial coating, a multi-layer composite method is adopted, including a transition layer, an insulation layer, an electric heating layer and a surface protection layer. At the same time, the process The prepared coating has high porosity, high oxidation rate, relatively poor thermal and electrical conductivity, and relatively complicated preparation process. The chromium (Cr) metal used in it is a heavy metal, and its related alloy materials may also pollute the environment.

Method used

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  • A kind of sterilization method of cold spray electrothermal coating

Examples

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Comparison scheme
Effect test

Embodiment 1

[0032] A polyether ether ketone polymer with a size of about 25mm×20mm×2mm is selected as the base material, and a pure copper coating with a thickness of about 1000 μm is deposited on the surface of the base by a cold spraying process as an electrothermal coating, in which the pure copper powder raw material and the base The pre-processing method is as follows:

[0033] 1. Sieve the copper powder raw material through a 250-400 mesh sieve to make the powder particle size uniform and improve the deposition efficiency. Before spraying, heat preservation at 100-120° C. for 1-2 hours to obtain dry powder that can be sprayed.

[0034] 2. Put the substrate in acetone and ultrasonically clean it for 5 to 10 minutes to remove oil stains, and obtain a substrate with a clean surface after drying.

[0035] The specific process parameters of cold spraying are: the main air pressure of cold spraying is 2MPa, the powder feeding air pressure is 2.2MPa, the main air temperature is 200°C, the...

Embodiment 2

[0040] Select glass with a size of about 25mm×20mm×2mm as the base material, and deposit a pure aluminum coating with a thickness of about 300 μm on the surface of the base as an electrothermal coating. The pretreatment method of the pure aluminum powder raw material and the base is as follows:

[0041] 1. Sieve the powder raw material with a 150-250 mesh sieve to make the powder particle size uniform and improve the deposition efficiency. Before spraying, heat preservation at 100-120° C. for 1-2 hours to obtain sprayable dry powder.

[0042] 2. Put the substrate in acetone and ultrasonically clean it for 5 to 10 minutes to remove oil stains, and obtain a substrate with a clean surface after drying.

[0043] The specific process parameters of cold spraying are as follows: the main air pressure of cold spraying is 2.5MPa, the powder feeding air pressure is 2.2MPa, the main air temperature is 250°C, the spraying powder flow rate is 50g / min, the spraying distance is 30mm, and the...

Embodiment 3

[0048] Alumina with a size of about 25mm×20mm×3mm is selected as the base material, and an aluminum / silicon carbide coating with a thickness of about 500 μm is deposited on the surface of the base as an electrothermal coating, in which silicon carbide powder and aluminum powder raw materials and the base The preprocessing method is as follows:

[0049] 1. Sieve the aluminum powder through a 150-250-mesh sieve; sieve the silicon carbide powder through a 700-900-mesh sieve to make the powder particle size uniform and improve the deposition efficiency. Before spraying, the two are kept at 100-120° C. for 1-2 hours to obtain sprayable dry powder.

[0050] 2. Put the substrate in acetone and ultrasonically clean it for 5 to 10 minutes to remove oil stains, and obtain a substrate with a clean surface after drying.

[0051] The specific process parameters of cold spraying are as follows: the main air pressure of cold spraying is 3MPa, the powder feeding air pressure is 2.2MPa, the m...

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Abstract

The invention relates to the technical field of antibacterial coatings, and discloses a sterilizing method for cold-spraying electrothermal coatings. The cold-spraying process is used to spray metal powder or ceramic-reinforced metal composite powder on the surface of a substrate to obtain an electrothermal coating with a thickness of 200-2000 μm; Apply a voltage below 8V to the electrothermal coating, and energize for 1 to 5 minutes to achieve sterilization. The invention realizes the rapid deposition of metal particles on the surface of the substrate through the cold spraying process, forming a layer of dense and conductive coating, without adding an antibacterial agent, and can realize rapid and efficient sterilization under the condition of low-voltage energization, effectively avoiding the Traditional coatings containing heavy metals can be applied to the surface of medical operating tables, the surface of infusion tables, and the surface protection of marine detection equipment against the pollution of the natural environment.

Description

technical field [0001] The invention relates to the technical field of antibacterial coatings, in particular to a sterilization method for cold-sprayed electrothermal coatings. Background technique [0002] With the rapid development of the economy and the continuous improvement of social needs, various materials are widely used in different fields of society; however, due to the complexity and variability of the environment, how to effectively protect materials to prolong their service life has become an issue. The focus of more and more researchers. Microorganisms, due to their small size, strong reproductive ability, and fast transmission speed, have caused increasingly serious pollution to the environment and damage to industrial facilities, which has also accelerated the development of related antibacterial materials and antibacterial technologies. In many engineering applications, we often use one or several specific properties of materials to deal with the erosion an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L2/04C23C24/04
CPCA61L2/04C23C24/04
Inventor 所新坤黄群周平秦加浩黄晶陈秀勇李华
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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