scholarly journals An Investigation of the Effect of Electrode Geometry and Frequency of Power Supply in the Homogeneity of Dielectric Barrier Discharge in Air

1970 ◽  
Vol 6 (1) ◽  
pp. 96-101 ◽  
Author(s):  
RB Tyata' ◽  
DP Subedi
Keyword(s):  
Contact Angle ◽  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Polymer Surface ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Electrode Geometry ◽  
Dielectric Barrier ◽  
Digital Oscilloscope ◽  
Measurement Surface

An experimental investigation of dielectric barrier discharge (DBD) produced in air isreported in the present paper. The discharge was produced by applying 0?20 kV AC source atfrequency 10?30 kHz. The main objective of the study was to investigate the dependence ofthe discharge homogeneity on the frequency of applied source and the geometry of theelectrodes. For this propose, three different types of electrodes were used. The discharge wassystematically investigated on an extended range of electrical parameters using highfrequency digital oscilloscope. Non-thermal nature of the discharge was tested by thetreatment of hydrophobic polymer surface by measuring the change in contact angle withwater drops.Key words: DBD; electrode geometry; contact angle measurement; surface treatmentDOI: 10.3126/kuset.v6i1.3316 Kathmandu University Journal of Science, Engineering and Technology Vol.6(1) 2010, pp96-101

Analysis of polymer surface treated by dielectric barrier discharge

2005 ◽  
Vol 14 (2) ◽  
pp. 363-367 ◽  
Author(s):  
Jai Hyuk Choi ◽  
Eung Suok Lee ◽  
Hong Koo Baik ◽  
Se-Jong Lee ◽  
Kie Moon Song ◽  
...  
Keyword(s):  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Polymer Surface ◽  
Dielectric Barrier

Ethylene Epoxidation in Low-Temperature AC Dielectric Barrier Discharge: Effect of Electrode Geometry

2010 ◽  
Vol 30 (4) ◽  
pp. 503-524 ◽  
Author(s):  
Thammanoon Sreethawong ◽  
Natthaworanan Permsin ◽  
Thitiporn Suttikul ◽  
Sumaeth Chavadej
Keyword(s):  
Low Temperature ◽  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Electrode Geometry ◽  
Dielectric Barrier ◽  
Ethylene Epoxidation

The Changes in Particle Distribution Over the Polymer Surface Under the Dielectric Barrier Discharge Plasma

2019 ◽  
Vol 18 (03n04) ◽  
pp. 1940079 ◽  
Author(s):  
V. A. Lapitskaya ◽  
T. A. Kuznetsova ◽  
G. B. Melnikova ◽  
S. A. Chizhik ◽  
D. A. Kotov
Keyword(s):  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Polymer Surface ◽  
Film Surface ◽  
Adhesion Forces ◽  
Surface Adhesion ◽  
Temperature Plasma ◽  
Dielectric Barrier ◽  
Force Microscopy ◽  
Barrier Discharge Plasma

Surface properties of a two-layer polymer PMF-351 film exposed to the dielectric barrier discharge (DBD) low-temperature plasma have been studied by atomic force microscopy. It is established that such treatment leads to an increase of surface adhesion. The largest adhesion forces of about 165[Formula: see text]nN were achieved after 5[Formula: see text]min of treatment at the distance of 2[Formula: see text]sm, power of 30[Formula: see text]W and nitrogen flow of 3.1[Formula: see text]L/min. SiO2 nanoparticles with diameters of 10–20[Formula: see text]nm were distributed over the treated polymer film surface from a suspension by centrifugation and they formed uniform rounded formations with the diameters of 50–100[Formula: see text]nm.

scholarly journals Study of High-Density Polyethylene (HDPE) Kinetics Modification Treated by Dielectric Barrier Discharge (DBD) Plasma

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2422
Author(s):  
João Freire de Medeiros Neto ◽  
Ivan Alves de Souza ◽  
Michelle Cequeira Feitor ◽  
Talita Galvão Targino ◽  
Gutembergy Ferreira Diniz ◽  
...  
Keyword(s):  
Contact Angle ◽  
Dielectric Barrier Discharge ◽  
High Density Polyethylene ◽  
Barrier Discharge ◽  
Sessile Drop ◽  
Attenuated Total Reflection ◽  
High Density ◽  
Material Surface ◽  
Dielectric Barrier ◽  
Physicochemical Changes

In this work, the plasma was used in the dielectric barrier discharge (DBD) technique for modifying the high-density polyethylene (HDPE) surface. The treatments were performed via argon or oxygen, for 10 min, at a frequency of 820 Hz, voltage of 20 kV, 2 mm distance between electrodes, and atmospheric pressure. The efficiency of the plasma was determined through the triple Langmuir probe to check if it had enough energy to promote chemical changes on the material surface. Physicochemical changes were diagnosed through surface characterization techniques such as contact angle, attenuated total reflection to Fourier transform infrared spectroscopy (ATR-FTIR), X-ray excited photoelectron spectroscopy (XPS), and atomic force microscopy (AFM). Plasma electronics temperature showed that it has enough energy to break or form chemical bonds on the material surface, impacting its wettability directly. The wettability test was performed before and after treatment through the sessile drop, using distilled water, glycerin, and dimethylformamide, to the profile of surface tensions by the Fowkes method, analyzing the contact angle variation. ATR-FTIR and XPS analyses showed that groups and bonds were altered or generated on the surface when compared with the untreated sample. The AFM showed a change in roughness, and this directly affected the increase of wettability.

scholarly journals Polylactic acid surface activation by atmospheric pressure dielectric barrier discharge plasma

2014 ◽  
Vol 13 (1) ◽  
Author(s):  
Beáta Hergelová ◽  
Anna Zahoranová ◽  
Dušan Kováčik ◽  
Monika Stupavská ◽  
Mirko Černák
Keyword(s):  
Polylactic Acid ◽  
Barrier Discharge ◽  
Treatment Time ◽  
Polymer Surface ◽  
Nonthermal Plasma ◽  
Ambient Air ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Surface Barrier ◽  
Barrier Discharge Plasma

AbstractPolylactic acid (PLA) is suitable for applications in packaging and biomedicine due to its biodegradability. To improve PLA surface adhesion a plasma-chemical treatment using nonthermal plasma generated in ambient air via diffuse coplanar surface barrier discharge (DCSBD) was used. The optimal treatment time and power were investigated. Interaction between active plasma species and the polymer surface, and the resulting surface changes were studied by contact angle measurement, surface energy determination, FTIR, and XPS. The most hydrophilic surface was obtained after only 3–4 s treatment. Treatment up to 10 s did not damage the polymer but longer treatments (30 and 60 s) caused partial degradation. The plasma broke C-C/C-H bonds and formed more C-O, O-C=O and C-O-C bonds. During storage surface oxygen decreased and a negligible amount of nitrogen was adsorbed. The oxygen-containing functional groups probably sank into the PLA volume after treatment.

Effects of Chemical Composition and the Addition of H2in a N2Atmospheric Pressure Dielectric Barrier Discharge on Polymer Surface Functionalization

Langmuir ◽  
2009 ◽  
Vol 25 (16) ◽  
pp. 9432-9440 ◽  
Author(s):  
Christian Sarra-Bournet ◽  
Guylaine Ayotte ◽  
Stéphane Turgeon ◽  
Françoise Massines ◽  
Gaétan Laroche
Keyword(s):  
Chemical Composition ◽  
Dielectric Barrier Discharge ◽  
Surface Functionalization ◽  
Barrier Discharge ◽  
Polymer Surface ◽  
Dielectric Barrier

scholarly journals Characterization Of Dielectric Barrier Discharge (DBD) Produced In Air At Atmospheric Pressure And Its Application In Surface Modification Of High-Density Polyethylene (HDPE)

2020 ◽  
Vol 1 (1) ◽  
pp. 27-35
Author(s):  
Rajesh Prakash Guragain ◽  
H B Baniya ◽  
S Dhungana ◽  
S Gautam ◽  
B P. Pandey ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Contact Angle ◽  
Surface Energy ◽  
Dielectric Barrier Discharge ◽  
High Density Polyethylene ◽  
Barrier Discharge ◽  
Sem Analysis ◽  
High Density ◽  
Optical Methods ◽  
Dielectric Barrier

The low surface energy of HDPE limits its industrial uses as it is not suitable for printing and adhesion. The main aim of this work is to improve the wetting properties of high-density polyethylene (HDPE) using air dielectric barrier discharge (DBD) operating at the line frequency (50 Hz). The estimation of electron temperature and electron density has been done by electrical and optical methods. The surface roughness of the control and plasma treated polymer film is analysed by contact angle (CA) measurement, surface energy measurement and scanning electron microscope (SEM) analysis. The contact angle was found to be suppressed from 93.180±2.00 to 63.750±0.880 after 10s of plasma treatment which implied that the surface property had changed to a hydrophilic state caused by an increase in the surface roughness.

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