The influences of the electrode dimension and the dielectric material on the breakdown characteristics of coplanar dielectric barrier discharge in ambient air

2017 ◽  
Vol 14 (12) ◽  
pp. 1700112 ◽  
Author(s):  
Shuqun Wu ◽  
Guowang Huang ◽  
Wenxin Cheng ◽  
Wen Chen ◽  
Bing Hai ◽  
...  
Keyword(s):  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Dielectric Material ◽  
Ambient Air ◽  
Dielectric Barrier

scholarly journals A Coaxial Dielectric Barrier Discharge Reactor for Treatment of Winter Wheat Seeds

2020 ◽  
Vol 10 (20) ◽  
pp. 7133
Author(s):  
Thalita M. C. Nishime ◽  
Nicola Wannicke ◽  
Stefan Horn ◽  
Klaus-Dieter Weltmann ◽  
Henrike Brust
Keyword(s):  
Winter Wheat ◽  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Ambient Air ◽  
Water Contact ◽  
Dielectric Barrier ◽  
Argon Discharge ◽  
Agricultural Applications ◽  
A Minor ◽  
Wheat Seeds

Non-thermal atmospheric pressure plasmas have been recently explored for their potential usage in agricultural applications as an interesting alternative solution for a potential increase in food production with a minor impact on the ecosystem. However, the adjustment and optimization of plasma sources for agricultural applications in general is an important study that is commonly overlooked. Thus, in the present work, a dielectric barrier discharge (DBD) reactor with coaxial geometry designed for the direct treatment of seeds is presented and investigated. To ensure reproducible and homogeneous treatment results, the reactor mechanically shakes the seeds during treatment, and ambient air is admixed while the discharge runs. The DBD, operating with argon and helium, produces two different chemically active states of the system for seed modification. The temperature evolution was monitored to guarantee a safe manipulation of seeds, whereas a physiological temperature was assured by controlling the exposure time. Both treatments led to a remarkable increase in wettability and acceleration in germination. The present study showed faster germination acceleration (60% faster after 24 h) and a lower water contact angle (WCA) (82% reduction) for winter wheat seeds by using the described argon discharge (with air impurities). Furthermore, the treatment can be easily optimized by adjusting the electrical parameters.

scholarly journals Electrode configurations and non-uniform dielectric barrier discharge properties

2009 ◽  
Vol 22 (2) ◽  
pp. 217-226
Author(s):  
Peter Dineff ◽  
Dilyana Gospodinova
Keyword(s):  
Dielectric Barrier Discharge ◽  
Atmospheric Pressure ◽  
Barrier Discharge ◽  
Ambient Air ◽  
Metallic Plate ◽  
Dielectric Barrier ◽  
Plate Electrode ◽  
Dielectric Surfaces ◽  
Non Thermal Plasma ◽  
Burning Mode

Interesting types of AC discharges in ambient air at atmospheric pressure for the generation of non-thermal plasma at/on dielectric surfaces were investigated. Pin-to-plane dielectric barrier discharge (PTP-DBD) was sustained in the electrode configurations combining electrode components of both corona and DBD - metallic pins, or triangle spikes electrode, situated single- or double-in-line and metallic plate electrode covered with a dielectric barrier. It was investigated experimentally and theoretically the burning mode of a PTP-DBD in ambient air at atmospheric pressure. The PTP-DBD behavior with single- or double-in-line spikes high voltage electrode was discussed. The PTP-DBD is a new DBD-based discharge. .

scholarly journals The effect of ambient air plasma generated by coplanar and volume dielectric barrier discharge on the surface characteristics of polyamide foils

Vacuum ◽  
2021 ◽  
Vol 183 ◽  
pp. 109887
Author(s):  
Vlasta Štěpánová ◽  
Petra Šrámková ◽  
Slavomír Sihelník ◽  
Monika Stupavská ◽  
Jana Jurmanová ◽  
...  
Keyword(s):  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Surface Characteristics ◽  
Ambient Air ◽  
Air Plasma ◽  
Dielectric Barrier

scholarly journals Changes in Surface Characteristics of BOPP Foil after Treatment by Ambient Air Plasma Generated by Coplanar and Volume Dielectric Barrier Discharge

Polymers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 4173
Author(s):  
Petra Šrámková ◽  
Zlata Kelar Tučeková ◽  
Michal Fleischer ◽  
Jakub Kelar ◽  
Dušan Kováčik
Keyword(s):  
Dielectric Barrier Discharge ◽  
Food Packaging ◽  
Barrier Discharge ◽  
Surface Characteristics ◽  
Ambient Air ◽  
Surface Wettability ◽  
Surface Barrier ◽  
Air Plasma ◽  
Dielectric Barrier ◽  
Plasma Sources

Biaxially oriented polypropylene (BOPP) is a highly transparent polymer defined by excellent mechanical and barrier properties applicable in the food packaging industry. However, its low surface free energy restricts its use in many industrial processes and needs to be improved. The presented study modifies a BOPP surface using two different atmospheric-pressure plasma sources operating in ambient air and capable of inline processing. The volume dielectric barrier discharge (VDBD) and diffuse coplanar surface barrier discharge (DCSBD) were applied to improve the wettability and adhesion of the 1–10 s treated surface. The changes in morphology and surface chemistry were analyzed by SEM, AFM, WCA/SFE, and XPS, and adhesion was evaluated by a peel force test. Comparing both plasma sources revealed their similar effect on surface wettability and incorporation of polar functional groups. Additionally, higher surface roughness in the case of VDBD treatment contributed to slightly more efficient adhesion in comparison to DCSBD. Although we achieved comparable results for both plasma sources in the term of enhanced surface wettability, degree of oxidation, and stability of induced changes, DCSBD had less effect on the surface deterioration than VDBD, where surface structuring caused an undesirable haze.

scholarly journals Treatment of Flax Fabric with AP-DBD in Parallel Plane Configuration

Plasma ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 272-282
Author(s):  
Rüdiger Sachs ◽  
Jörg Ihde ◽  
Ralph Wilken ◽  
Bernd Mayer
Keyword(s):  
Composite Materials ◽  
Dielectric Barrier Discharge ◽  
Functional Groups ◽  
Polymer Matrix ◽  
Barrier Discharge ◽  
Natural Fibers ◽  
Ambient Air ◽  
Parallel Plane ◽  
Dielectric Barrier

For the use of natural fibers in composite materials it is often necessary to improve the compatibility between fiber (sizing) and polymer matrix systems, e.g., by increasing the number of functional groups on the fiber surfaces. In this work, a dielectric barrier discharge (DBD) source in plane configuration is used to treat flax fabrics in ambient air. It is examined whether it is possible to increase the functionality on both fabric sides, which is achieved by simple changes in the DBD setup. After evaluating the treatment homogeneity of the filamentary plasma, an explanation for the treatment mechanism on the fiber surfaces is developed. It is shown that waxy substances, which naturally occur on natural fibers, play an important role in the wettability of the fabric.

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