Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method for surface modification of metal materials by atmospheric pressure dielectric barrier discharge cold plasma jet

A technology of dielectric barrier discharge and cold plasma, which is applied in the direction of plasma, metal material coating technology, electrical components, etc., can solve the problems of difficult preparation, inability to change the surface structure, inconvenient precise processing, etc., and achieve the concentration of the modified area , high modification efficiency and simple operation

Active Publication Date: 2019-04-09
DALIAN UNIV OF TECH
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method cannot change the surface structure when modifying the surface of the material, resulting in the rapid recovery of the wettability of the modified material surface in a short period of time due to reactions such as desorption and dissociation.
In addition, this method only provides a modification method for superhydrophobic materials and hydrophobic materials, and fails to realize the modification of superoleophobic materials, and it is difficult to prepare devices such as microfluidic chips that can be used for organic droplet manipulation.
The gas used in this method also has certain limitations. Only reactive gases such as nitrogen, oxygen, and air can be used as working gases, and inactive gases (such as helium, argon, etc.) The range is wide, and it is not convenient to accurately process the local area of ​​the material

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for surface modification of metal materials by atmospheric pressure dielectric barrier discharge cold plasma jet
  • A method for surface modification of metal materials by atmospheric pressure dielectric barrier discharge cold plasma jet
  • A method for surface modification of metal materials by atmospheric pressure dielectric barrier discharge cold plasma jet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]The surface modification of superoleophobic aluminum flakes by atmospheric pressure dielectric barrier discharge cold plasma jet can significantly improve its surface energy and wettability, and realize the transformation from superoleophobic to superoleophilic. When the voltage is low, it does not change its surface structure.

[0034] The cold plasma jet generator 4 adopts an insulating quartz glass tube, and the high-voltage electrode 5 is wound on the 4. The high-voltage power supply 6 adopts a sine wave AC power supply with an output frequency of 30-100kHz and an output voltage of 0-30kV; the high-voltage output end of the high-voltage power supply 6 is connected to the high-voltage electrode 5 on the cold plasma jet generator 4, and the low-voltage output end is grounded. The gas in the working gas source 1 is high-purity helium. After the equipment is connected, the distance between the outlet of the cold plasma jet generator 4 and the treated metal material 8 (a...

Embodiment 2

[0036] The surface modification of superoleophobic aluminum sheet was carried out by using atmospheric pressure dielectric barrier discharge cold plasma jet to realize the transformation from superoleophobic to superoleophilic. When the voltage is high, its surface structure can be changed to achieve long-term lyophilic modification.

[0037] The cold plasma jet generator 4 adopts an insulated PTFE (polytetrafluoroethylene) tube, adopts the high-voltage power supply described in Embodiment 1, and the connection mode between the jet generator and the high-voltage power supply is the same as that in Embodiment 1. Turn on the gas source processing device 2, adjust the gas mass flow controller 3, so that the helium flow rate reaches 3SLM; turn on the high-voltage power supply 6, adjust the output frequency to 56kHz, and gradually increase the output voltage to 30kV, at this time, the dielectric barrier discharge cold plasma jet 7 acts on the surface of the super-oleophobic aluminu...

Embodiment 3

[0039] The surface modification of superhydrophobic aluminum sheets by atmospheric pressure dielectric barrier discharge cold plasma jet can significantly improve the surface energy and wettability in a short time, and realize the rapid transformation from superhydrophobic to superhydrophilic.

[0040] The cold plasma jet generator 4 adopts an insulated alumina ceramic tube. The high-voltage power supply and its connection with the jet generator are the same as those in Embodiment 1, and the operation steps and methods are also the same. As shown in Figure 7, the water contact angle of the superhydrophobic aluminum surface before treatment is about 157°, and after only 1s treatment, the contact angle becomes 20°, showing hydrophilicity. After 3s of treatment, the contact angle was 0°. It can be seen that this modification method can realize the rapid modification of superhydrophobic aluminum flakes.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for modifying metal material surface through dielectric barrier discharge at atmospheric pressure and cold plasma jet, and belongs to the technical field of material surface processing. According to the method, through dielectric barrier discharge at atmospheric pressure, a large quantity of active particles are generated to mutually react with the metal material surface, oxidation, etching, cross-linking and other physical and chemical reactions happen, and the metal surface is modified. The cold plasma jet is generated by a cool plasma generator with a charging form being dielectric barrier discharge. When charging voltage is low, the cold plasma jet can conduct lyotropic modification on the metal material surface quickly, and the surface structure of the surface is not changed; when the charging voltage is high, the jet can quickly conduct modification, and change a microstructure of the surface at the same time, and thus the lyotropic modification effect is kept for long. The method for modifying the metal material surface through the dielectric barrier discharge at the atmospheric pressure and the cold plasma jet is high in processing efficiency, free of vacuum equipment, low in cost, simple and flexible in operation and free of pollution to environment, and is a novel green surface modification method.

Description

technical field [0001] The invention relates to a method for treating the surface of metal materials by using atmospheric pressure dielectric barrier discharge to generate cold plasma jets, and belongs to the technical field of material surface treatment. Background technique [0002] With the rapid development of the manufacturing industry, the application fields of metal materials are becoming wider and wider, and different application fields have different requirements for the surface properties of materials. Wettability is one of the important characteristics of metal materials. According to different applications, it is of great significance to rationally control the wettability of the surface of metal materials. At present, the methods for surface modification of materials mainly include wet chemical method, ultraviolet irradiation method, low temperature plasma treatment method, laser treatment, photolithography and so on. Among them, low-temperature plasma modificat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H05H1/24C23F4/00C23C8/36
CPCC23C8/36C23F4/00H05H1/2406
Inventor 刘新刘硕刘吉宇陈发泽宋金龙孙晶
Owner DALIAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com