scholarly journals Improving the Adhesiveness of Cemented Glass Components by DBD Plasma Pre-Treatment at Atmospheric Pressure

2019 ◽  
Vol 9 (24) ◽  
pp. 5511 ◽  
Author(s):  
Christoph Gerhard ◽  
Gerrit Mielke ◽  
Stephan Brückner ◽  
Olaf Wermann
Keyword(s):  
Plasma Treatment ◽  
Atmospheric Pressure ◽  
Uv Curing ◽  
Artificial Ageing ◽  
Short Term ◽  
Dbd Plasma ◽  
Pull Strength ◽  
Barrier Discharge Plasma ◽  
Pre Treatment ◽  
The Impact

Cemented optical components and groups are essential devices for the realisation of modern systems and apparatuses used in a broad range of different applications such as telecommunications, imaging and even surgery. However, various parameters may affect the stability of cemented connections. In this context, the impact of dielectric barrier discharge plasma at atmospheric pressure on the adhesiveness of cemented glass components was evaluated in the present work. For this purpose, the plasma-induced change in surface wettability and energy as well as the cement’s adhesive pull strength was measured. Investigations were performed on samples, which were subject to different procedures of artificial ageing. It is shown that the adhesive pull strength of cemented glass components was notably increased after a short-term plasma treatment of merely 10 s due to an enhanced wettability of the applied UV-curing optical cement. The pull strength, i.e., the adhesiveness of cemented glasses was increased by a factor of 2.1 to 4.6, depending on the particularly applied artificial ageing procedure. The results and findings finally demonstrate the high potential of the applied short-term plasma treatment as a cleaning and surface activation step in optics manufacturing on an industrial scale.

scholarly journals Virucidal Effects of Dielectric Barrier Discharge Plasma on Human Norovirus Infectivity in Fresh Oysters (Crassostrea gigas)

Foods ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1731
Author(s):  
Man-Seok Choi ◽  
Eun Bi Jeon ◽  
Ji Yoon Kim ◽  
Eun Ha Choi ◽  
Jun Sup Lim ◽  
...  
Keyword(s):  
Plasma Treatment ◽  
Dielectric Barrier Discharge ◽  
Copy Number ◽  
Barrier Discharge ◽  
Quantitative Polymerase Chain Reaction ◽  
Inactivation Kinetics ◽  
Dbd Plasma ◽  
Human Norovirus ◽  
Dielectric Barrier ◽  
The Impact

This study investigates the effects of dielectric barrier discharge (DBD) plasma treatment (1.1 kV, 43 kHz, N2 1.5 L/min, 10~60 min) on human norovirus (HuNoV) GII.4 infectivity in fresh oysters. HuNoV viability in oysters was assessed by using propidium monoazide (PMA) as a nucleic acid intercalating dye before performing a real-time reverse transcription–quantitative polymerase chain reaction (RT-qPCR). Additionally, the impact of the DBD plasma treatment on pH and Hunter colors was assessed. When DBD plasma was treated for 60 min, the HuNoV genomic titer reduction without PMA pretreatment was negligible (<1 log copy number/µL), whereas when PMA treatment was used, HuNoV titer was reduced to >1 log copy number/µL in just 30 min. D1 and D2-value of HuNoV infectivity were calculated as 36.5 and 73.0 min of the DBD plasma treatment, respectively, using the first-order kinetics model (R2 = 0.98). The pH and Hunter colors were not significantly different (p > 0.05) between the untreated and DBD-plasma-treated oysters. The results suggest that PMA/RT-qPCR could help distinguish HuNoV infectivity without negatively affecting oyster quality following >30 min treatment with DBD plasma. Moreover, the inactivation kinetics of nonthermal DBD plasma against HuNoV in fresh oysters might provide basic information for oyster processing and distribution.

Plasma Surface Modification of Glass Fibre Sizing for Manufacturing Polymer Composites

2020 ◽  
Vol 843 ◽  
pp. 159-164
Author(s):  
Yukihiro Kusano ◽  
Daan Jonas Hottentot Cederløf ◽  
Søren Fæster
Keyword(s):  
Plasma Treatment ◽  
Ultrasonic Irradiation ◽  
Glass Fibre ◽  
Atmospheric Pressure ◽  
Discharge Plasma ◽  
Fibre Bundle ◽  
Fluorine Content ◽  
Gas Mixture ◽  
Dielectric Barrier Discharge Plasma ◽  
Barrier Discharge Plasma

Bundles or fabrics of sized glass fibres were treated by a dielectric barrier discharge plasma in a He/CF4 gas mixture at atmospheric pressure with and without ultrasonic irradiation. The plasma treatment introduced fluorine both inside and outside of the fibre bundle, decreasing wetting of glycerol. Ultrasonic irradiation markedly increased the fluorine content as well as the silicon, calcium, and aluminium contents, indicating simultaneous fluorination and preferential etching of organic components. It is indicated that plasma treatment in a He/CF4 gas mixture can be used for controlling the surface properties of glass fibre bundles, and that ultrasonic irradiation can enhance functionalization and etching.

Surface Modification of Polypropylene Melt Blown Non-Woven Using Atmospheric Pressure Dielectric Barrier Discharge Plasma

2010 ◽  
Vol 42 ◽  
pp. 228-231 ◽  
Author(s):  
Yan Zhang ◽  
Yin Ding Lv
Keyword(s):  
Dielectric Barrier Discharge ◽  
Atmospheric Pressure ◽  
Barrier Discharge ◽  
Treatment Time ◽  
Woven Fabric ◽  
Dbd Plasma ◽  
Water Contact ◽  
Dielectric Barrier ◽  
Barrier Discharge Plasma ◽  
Plasma Treatment Time

In this paper, polypropylene (PP) melt blown non-woven fabric is treated by atmospheric pressure N2 or N2/CO2 dielectric barrier discharge (DBD) plasma. The variation of the surface hydrophilicity of PP sample is experimentally investigated by surface water contact angle, Fourier transform infrared reflectance spectroscopy (FTIR-ATR). The results show that the hydrophilicity of PP sample is considerably improved as long as the very short plasma treatment time (several seconds). However, the treatment effect of atmospheric N2/CO2 plasma is worse than that of atmospheric N2 plasma.

Study of PVA on Polyester Desizing with Atmospheric Pressure Dielectric Barrier Discharge Plasma

2013 ◽  
Vol 681 ◽  
pp. 11-15 ◽  
Author(s):  
Li Ming Li ◽  
Yong Qiang Li ◽  
Jin Qiang Liu
Keyword(s):  
Plasma Treatment ◽  
Dielectric Barrier Discharge ◽  
Atmospheric Pressure ◽  
Discharge Plasma ◽  
Barrier Discharge ◽  
Polyester Fabric ◽  
Atmospheric Plasma ◽  
Dielectric Barrier Discharge Plasma ◽  
Dielectric Barrier ◽  
Barrier Discharge Plasma

The effect of atmospheric pressure dielectric barrier discharge plasma treatment on desizing polyvinyl alcohol (PVA) on polyester fabric was discussed as compared desizing with alkali through a combination of desizing rate, field scanning electron microscopy and strength test. The dyeing properties of polyester fabrics treated with atmospheric plasma have also been studied. The results show that plasma treatment can improve desizing rate, surface color depth and dye-uptake for polyester fabric.

scholarly journals Synergistical enhancement of the electrochemical properties of lignin-based activated carbon using NH3·H2O dielectric barrier discharge plasma

RSC Advances ◽  
2017 ◽  
Vol 7 (12) ◽  
pp. 7392-7400 ◽  
Author(s):  
Weimin Chen ◽  
Xiaoyan Zhou ◽  
Shukai Shi ◽  
Nguyen Thiphuong ◽  
Minzhi Chen
Keyword(s):  
Activated Carbon ◽  
Electrochemical Properties ◽  
Plasma Treatment ◽  
Discharge Plasma ◽  
Barrier Discharge ◽  
Dielectric Barrier Discharge Plasma ◽  
Treatment Results ◽  
Dbd Plasma ◽  
Dielectric Barrier ◽  
Barrier Discharge Plasma

DBD plasma treatment results in the enhancement on specific capacitance by 74.61% within 120 s.

Enhanced Membrane Permeability of Saccharomyces cerevisiae Induced by Dielectric Barrier Discharge Plasma at Atmospheric Pressure

2014 ◽  
Vol 1033-1034 ◽  
pp. 229-235 ◽  
Author(s):  
Xiao Yu Dong
Keyword(s):  
Membrane Permeability ◽  
Atmospheric Pressure ◽  
Calcium Concentration ◽  
Treatment Time ◽  
Free Calcium ◽  
Dielectric Barrier Discharge Plasma ◽  
Dbd Plasma ◽  
Barrier Discharge Plasma ◽  
Plasma Treatment Time ◽  
Free Calcium Concentration

In this study, we investigated the effect of DBD plasma at atmospheric pressure on membrane permeability, potential membrane and cytoplasmic free calcium concentration inSaccharomyces cerevisiae. S. cerevisiaecells were treated with DBD plasma for 0, 1, 2, 3, 4 and 5 min and then subjected to various analyses before the commencement of fermentation or at the middle (9 h) and end (21 h) stages of fermentation. The results show that compared to non-treated cells, cells treated with plasma for 2-5 min show significant increase in membrane potential, while cells treated for 2-4 min show significant increase in membrane permeability prior to fermentation. Plasma-treated cells also show increased cytoplasmic free Ca2+that depends on plasma treatment time, with the highest increase, 35%, observed for 5-min treatment time. However, at the middle (9 h) and end (21 h) stages of fermentation, these changes become insignificant compared to the control.

scholarly journals Reel-to-Reel Atmospheric Pressure Dielectric Barrier Discharge (DBD) Plasma Treatment of Polypropylene Films

2017 ◽  
Vol 7 (4) ◽  
pp. 337 ◽  
Author(s):  
Lukas Seidelmann ◽  
James Bradley ◽  
Marina Ratova ◽  
Jonathan Hewitt ◽  
Jamie Moffat ◽  
...  
Keyword(s):  
Plasma Treatment ◽  
Dielectric Barrier Discharge ◽  
Atmospheric Pressure ◽  
Barrier Discharge ◽  
Dbd Plasma ◽  
Dielectric Barrier ◽  
Polypropylene Films

scholarly journals Atmospheric Pressure Dielectric Barrier Discharge Plasma-Enhanced Optical Contact Bonding of Coated Glass Surfaces

2021 ◽  
Vol 11 (15) ◽  
pp. 6755
Author(s):  
Josephine Neumann ◽  
Stephan Brückner ◽  
Wolfgang Viöl ◽  
Christoph Gerhard
Keyword(s):  
Shear Strength ◽  
Dielectric Barrier Discharge ◽  
Atmospheric Pressure ◽  
Barrier Discharge ◽  
Surface Preparation ◽  
Curing Temperature ◽  
Dbd Plasma ◽  
Functional Layer ◽  
Dielectric Barrier ◽  
The Impact

This paper reports on plasma-enhanced bonding of optics surfaces coated with highly sensitive functional layers using surface preparation by a dielectric barrier discharge (DBD) plasma. The samples to be bonded were treated with a DBD in diffuse mode at atmospheric pressure for 30 s which is applied directly to the sample surface, then joined with the aid of de-ionised water and cured subsequently. The plasma treatment itself already increased the shear strength achieved by a factor of two compared to classical wringing or direct contacting, while the curing process led to a further increase by a factor of up to five, depending on curing temperature. The observed enhancement of shear strength can be attributed to DBD plasma-induced cleaning and most likely additional activation of the surface as verified by contact angle measurements. Since the impact of the used plasma on the surface is quite gentle in comparison to other bonding processes or other plasma-based processes reported in the literature, a destruction of the treated functional layer is avoided. This advantage makes it possible to bond even optics surfaces coated with sensitive materials.

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