The Role of Oxygen in a Large Area of RF-Powered Atmospheric Pressure Dielectric Barrier Glow Discharge Plasma in Sterilization

2011 ◽  
Vol 39 (8) ◽  
pp. 1689-1694 ◽  
Author(s):  
Hua Pang ◽  
Qiang Chen ◽  
Bin Li ◽  
Fei Fei ◽  
Size Yang
Keyword(s):  
Glow Discharge ◽  
Atmospheric Pressure ◽  
Discharge Plasma ◽  
Glow Discharge Plasma ◽  
Large Area ◽  
Dielectric Barrier

Surface Treatment of PMIA Fibers with Sub-Atmospheric Pressure Dielectric Barrier Glow Discharge Plasma

2014 ◽  
Vol 1048 ◽  
pp. 72-76
Author(s):  
Huan Da Zheng ◽  
Juan Zhang ◽  
Bing Du ◽  
Qu Fu Wei ◽  
Lai Jiu Zheng
Keyword(s):  
Glow Discharge ◽  
Atmospheric Pressure ◽  
Chemical Structure ◽  
Surface Characterization ◽  
Discharge Plasma ◽  
Treatment Time ◽  
Fiber Surface ◽  
Glow Discharge Plasma ◽  
Dielectric Barrier ◽  
Ft Ir

Meta-aramid fibers were treated by sub-atmospheric pressure dielectric barrier glow discharge plasma. The effect of plasma treatment time on the fiber surface physical and chemical properties was studied by using surface characterization techniques. Scanning electron microscopy (SEM) was performed to determine the surface morphology changes. FT-IR spectroscopy measurements were performed to investigate the change of chemical structure. Dynamic contact angle analysis (DCAA) was used to examine the changes of the fiber surface wettability. SEM analysis showed that there was obvious crack along the fibers’ axial direction present on the fiber surface, which resulted in the better wetting behavior of the plasma-treated PMIA fiber. FT-IR analysis showed that plasma had little effect on the chemical structure of PMIA fibers. DCAA analysis showed that the wettability of the samples could be improved with the treatment time increasing. In addition, a slight decrease in breaking strength was observed at the treatment time ranging from 60 to 180 s in comparison with the untreated sample.

Nanosecond-pulsed atmospheric pressure glow discharge plasma and its applications

2010 ◽  
Vol 22 (10) ◽  
pp. 2299-2302
Author(s):  
万军 Wan Jun ◽  
贾向红 Jia Xianghong ◽  
宋铭炜 Song Mingwei ◽  
王守国 Wang Shouguo
Keyword(s):  
Glow Discharge ◽  
Atmospheric Pressure ◽  
Discharge Plasma ◽  
Glow Discharge Plasma ◽  
Atmospheric Pressure Glow Discharge ◽  
Pressure Glow Discharge

Dust vortices in a direct current glow discharge plasma: a delicate balance between ion drag and Coulomb force

2019 ◽  
Vol 85 (1) ◽  
Author(s):  
Sayak Bose ◽  
M. Kaur ◽  
P. K. Chattopadhyay ◽  
J. Ghosh ◽  
Edward Thomas ◽  
...  
Keyword(s):  
Glow Discharge ◽  
Discharge Current ◽  
Discharge Plasma ◽  
Coulomb Force ◽  
Plasma Potential ◽  
Glow Discharge Plasma ◽  
Dust Particles ◽  
Charged Dust ◽  
Surface Evolution

Dust vortices with a void at the centre are reported in this paper. The role of the spatial variation of the plasma potential in the rotation of dust particles is studied in a parallel plate glow discharge plasma. Probe measurements reveal the existence of a local potential minimum in the region of formation of the dust vortex. The minimum in the potential well attracts positively charged ions, while it repels the negatively charged dust particles. Dust rotation is caused by the interplay of the two oppositely directed ion drag and Coulomb forces. The balance between these two forces is found to play a major role in the radial confinement of the dust particles above the cathode surface. Evolution of the dust vortex is studied by increasing the discharge current from 15 to 20 mA. The local minimum of the potential profile is found to coincide with the location of the dust vortex for both values of discharge currents. Additionally, it is found that the size of the dust vortex as well as the void at the centre increases with the discharge current.

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