A method for surface modification of metal materials by atmospheric pressure cooling plasma jet

A technology of cold plasma and metal materials, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., to achieve low cost, improve hydrophilicity, and increase surface energy.

Active Publication Date: 2015-10-28
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The rapid development of smart devices requires rapid conversion between super-hydrophobic and super-hydrophilic surfaces in a short period of time, and the transformation from super-hydrophobic to super-hydrophilic under normal temperature and pressure conditions has not been seen so far through atmospheric pressure-cooled plasma jets. to report

Method used

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  • A method for surface modification of metal materials by atmospheric pressure cooling plasma jet
  • A method for surface modification of metal materials by atmospheric pressure cooling plasma jet
  • A method for surface modification of metal materials by atmospheric pressure cooling plasma jet

Examples

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Effect test

Embodiment 1

[0016] The surface modification of superhydrophobic aluminum by atmospheric pressure-cooled plasma jet can significantly improve its surface energy and wettability, and realize the transformation from superhydrophobic to superhydrophilic.

[0017] The atmospheric pressure cooled plasma jet generator 1 uses a bare electrode discharge form, and the cold plasma jet generated by this type of electrode will not cause spark breakdown discharge between the metal and the metal. The two electrodes are respectively a nozzle electrode made of brass and a needle electrode made of tungsten, and the vertical distance between the two electrodes is 2.0 mm. The high-voltage power supply 5 adopts an intermediate-frequency sine wave AC power supply, with an output frequency of 50-120kHz, an output voltage of 0-10kV, and a maximum power of 150W; the high-voltage and low-voltage output terminals of the high-voltage power supply 5 are respectively connected to the central needle electrode and the n...

Embodiment 2

[0019] The surface modification of ordinary aluminum by atmospheric pressure-cooled plasma jet can improve its surface energy and wettability, and make the treated surface have good hydrophilicity.

[0020] The atmospheric pressure cooling plasma jet generator and its discharge parameters are the same as those in Example 1, and the operation steps and methods are also the same. image 3 Shown is the relationship between the water contact angle on the surface of ordinary aluminum and the treatment time of atmospheric pressure-cooled plasma. It can be seen that the original contact angle of the ordinary aluminum surface is about 80°. After the surface is treated with the atmospheric pressure cooling plasma jet, its wettability can be improved, and the contact angle can be reduced to 20° after 90s of treatment. It has good hydrophilicity.

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Abstract

The invention provides a method for modifying the surface of a metal material by adopting atmospheric-pressure cold plasma jet, and belongs to the technical field of material surface treatment. The method comprises the following steps that: high-energy electrons and particles which are contained in the atmospheric-pressure cold plasma jet generate non-elastic collision with water molecules and oxygen molecules which are contained in an atmospheric environment to generate an oxygen-containing active particle; and the oxygen-containing active particle generates chemical reaction with the surface of the metal material to introduce an oxygen-containing functional group to the surface of the metal material, wherein the cold plasma jet is generated by a cold plasma jet generator with the discharge form of bare electrode corona discharge. The method provided by the invention can realize the modification of a designated-position and large-size metal surface by controlling the size or motion locus of the cold plasma jet without complex vacuum equipment, is low in cost and easily and flexibly operated without pollution on the environment, is a green surface modification method and can be applied to the surface modification of various non-metal materials.

Description

technical field [0001] The invention relates to a method for modifying the surface of a metal material by an atmospheric pressure-cooled plasma jet, and belongs to the technical field of material surface treatment. Background technique [0002] Wettability is one of the important properties of the material surface, and many methods have been used to improve the wettability of the material surface, such as wet chemical method, laser treatment, ultraviolet treatment and plasma treatment, among which, plasma is applied to the material No chemicals are needed for surface modification, no pollution to the environment, and the treatment effect is good, so its research is very active. The invention patents with publication numbers CN1526753A, CN1900408A, and CN202318981U all provide devices and methods for surface modification of materials using plasma. However, these devices or methods require complex and expensive vacuum equipment, and the size of the material to be processed is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/10C23C8/36
Inventor 刘新徐文骥陈发泽黄帅杨晓龙宋金龙
Owner DALIAN UNIV OF TECH
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