scholarly journals Atmospheric Pressure Plasma Grafting of a Vinyl-Quaternary Compound to Nonwoven Polypropylene and Cotton

2018 ◽  
Vol 13 (3) ◽  
pp. 155892501801300
Author(s):  
Carrie Cornelius ◽  
Marian McCord ◽  
Mohamed Bourham ◽  
Peter Hauser
Keyword(s):  
North Carolina ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Atmospheric Plasma ◽  
Quaternary Compound ◽  
North Carolina State University ◽  
Pressure Plasma ◽  
Plasma Device ◽  
Plasma Grafting ◽  
Graft Yield

Nonwoven polypropylene and cotton fabrics are grafted to a vinyl quaternary compound using atmospheric-pressure plasma. Two different atmospheric plasma devices are used -the NCAPS (North Carolina Atmospheric Plasma System), a dielectric barrier discharge device created by North Carolina State University, and a plasma device from APJeT® Inc. The addition of additives such as Mohr's salt, potassium persulfate, and diacrylates are assessed to see if graft yield can be increased. Acid dye tests, SEM, and XPS reveal successful grafting of the vinyl quaternary compound. A combination of all four additives is found to yield the highest graft yields and greatest uniformity.

Effects of green technology plasma pre-treatment on the wettability and ink adhesion of paper

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Samed Ayhan Özsoy ◽  
Safiye Meriç Acıkel ◽  
Cem Aydemir
Keyword(s):  
Contact Angle ◽  
Plasma Treatment ◽  
Surface Properties ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Contact Angles ◽  
Content Type ◽  
Surface Energies ◽  
Pressure Plasma ◽  
Plasma Device

Purpose The surface energy of the printing material can be increased to desired levels with different chemicals or methods. However, the important thing is that the surface properties of printing material are not affected negatively. In this way the aim of this paper provide that the surface properties of matte and glossy coated paper is improved by the argon containing atmospheric pressure plasma device because the plasma treatment method does not occur surface damaging on the papers. Design/methodology/approach In experimental studies, test samples cut from 160 mm × 30 mm in size from 115 g/m2 gloss- and matt-coated papers were used. The plasma treatments of paper samples were carried out with an argon containing atmospheric pressure plasma device of laboratory scale that produces plasma of the corona discharge type at radio frequency. The optimized plasma parameters were at a frequency of 20 kHz and plasma power 200 W. A copper electrode of length 12 cm and diameter 2.5 mm was placed in the centre of the nozzle. Findings Research findings showed that the surface energies of the papers increased with the increase in plasma application time. While the contact angle of the untreated glossy paper is 82.2, 8 second plasma applied G3 sample showed 54 contact angle value. Similarly, the contact angle of the base paper of matt coated is 91.1, while M3 is reduced to 60.4 contact angles by the increasing plasma time. Originality/value Plasma treatment has shown that no chemical coating is needed to increase the wettability of the paper surface by reducing the contact angle between the paper and the water droplet. In addition, the surface energies of all papers treated by argon gas containing atmospheric pressure plasma, increased. Plasma treatment provides to improve both the wettability of the paper and the adhesion property required for the ink, with an environmentally friendly approach.

Hollow cathode and hybrid atmospheric plasma sources

2008 ◽  
Vol 80 (9) ◽  
pp. 1931-1937 ◽  
Author(s):  
Hana Baránková ◽  
Ladislav Bardos
Keyword(s):  
Radio Frequency ◽  
Hollow Cathode ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Hollow Cathode Discharge ◽  
Atmospheric Plasma ◽  
Plasma Sources ◽  
Pressure Plasma ◽  
Hollow Electrode

Generation and features of the radio frequency (RF) hollow cathode discharge (HCD) are compared for the atmospheric and moderate pressures. The atmospheric-pressure plasma systems, fused hollow cathode (FHC) and hybrid hollow electrode-activated discharge (H-HEAD), are described. Examples of applications where both FHC and H-HEAD have already been employed are given, and potentials for new processes are discussed.

scholarly journals Introduction of a new atmospheric pressure plasma device and application on tomato seeds

2011 ◽  
Vol 02 (01) ◽  
pp. 23-27 ◽  
Author(s):  
Zhuwen Zhou ◽  
Yanfen Huang ◽  
Size Yang ◽  
Wei Chen
Keyword(s):  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Pressure Plasma ◽  
Tomato Seeds ◽  
Plasma Device

scholarly journals Development of a Multihole Atmospheric Plasma Jet for Growth Rate Enhancement of Broccoli Seeds

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1134
Author(s):  
Khattiya Srakaew ◽  
Artit Chingsungnoen ◽  
Waraporn Sutthisa ◽  
Anthika Lakhonchai ◽  
Phitsanu Poolcharuansin ◽  
...  
Keyword(s):  
Growth Rate ◽  
Atmospheric Pressure ◽  
Seed Treatment ◽  
Treatment Time ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Atmospheric Plasma ◽  
Atmospheric Pressure Plasma Jet ◽  
Pressure Plasma ◽  
Significant Difference

This work aims to develop a multihole atmospheric pressure plasma jet (APPJ) device to increase the plasma area and apply it to a continuous seed treatment system. Broccoli seed was used to study the effects of an atmospheric pressure plasma jet on seed germination and growth rate. An argon flow rate of 4.2 lpm, a plasma power of 412 W, and discharge frequency of 76 kHz were used for seed treatment. The contact angle decreased strongly with the increase in treatment time from 20 s to 80 s. The broccoli seed’s outer surface morphology seemed to have been slightly modified to a smoother surface by the plasma treatment during the treatment time of 80 s. However, the cross-sectional images resulted from Synchrotron radiation X-ray tomographic microscopy (SRXTM) confirmed no significant difference between seeds untreated and treated by plasma for 80 s. This result indicates that plasma does not affect the bulk characteristics of the seed but does provide delicate changes to the top thin layer on the seed surface. After seven days of cultivation, the seed treated by plasma for 30 s achieved the highest germination and yield.

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