scholarly journals Investigations of the surface activation of thermoplastic polymers by atmospheric pressure plasma treatment with a stationary plasma jet

2016 ◽  
Author(s):  
Elmar Moritzer ◽  
Timo Nordmeyer ◽  
Christian Leister ◽  
Martin Andreas Schmidt ◽  
Artur Grishin ◽  
...  
Keyword(s):  
Plasma Treatment ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Surface Activation ◽  
Thermoplastic Polymers ◽  
Pressure Plasma ◽  
Stationary Plasma

Synergetic effect of the catalytic action of plasma jet deposited TiOx coatings and atmospheric pressure plasma treatment on the degradation of RYRR

2020 ◽  
Vol 389 ◽  
pp. 125642 ◽  
Author(s):  
K. Navaneetha Pandiyaraj ◽  
D. Vasu ◽  
P.V.A. Padmanabhan ◽  
Rouba Ghobeira ◽  
Parinaz Saadat Esbah Tabaei ◽  
...  
Keyword(s):  
Plasma Treatment ◽  
Atmospheric Pressure ◽  
Synergetic Effect ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Catalytic Action ◽  
Pressure Plasma

Oxygen Plasma Induced ZnO-CuO Nanostructure Growth on a Brass Substrate by Atmospheric-Pressure Plasma Jet

2011 ◽  
Vol 688 ◽  
pp. 186-190 ◽  
Author(s):  
Hao Long Chen ◽  
Zin Ching Liou ◽  
Shian Jang Lin
Keyword(s):  
Plasma Treatment ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Nano Particles ◽  
Atmospheric Pressure Plasma Jet ◽  
Zno Nanostructures ◽  
One Dimensional ◽  
Pressure Plasma ◽  
Nano Crystal

A convenient method for direct and large-area growth of one-dimensional (1-D) CuO and ZnO nanostructures on a conductive brass substrate has been developed. The ZnO and CuO nanostructures have been simultaneously induced and growth on a brass (70Cu-30Zn alloy) substrate by using an atmospheric-pressure plasma jet (APPJ) with pure oxygen as the reaction gas in an ambient environment. Various one-dimensional (1-D) nanostructures such as nano-particles, nanowires, nanobelts, nanocombs, and nanosheets have been in situ grown on the brass substrates under different plasma treatment times. The plasma power of 150W and scanning speed of sample stage 1 mm/sec with different treating times were used in plasma surface treatment processing. The nano-scaled ZnO and CuO formation and its structure were characterized by means of grazing-incidence X-ray diffraction, Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS). The results showed that the nano-scaled CuO and ZnO growth process was as follows: nano-particles, nano-crystal clusters then nano-crystal columns with increasing plasma treatment times. The growth of nano-scaled oxide formed in sequence that CuO was first grew on the brass substrate then ZnO. The morphologies of nano-scaled ZnO resembled bulbs and long-legged tetrapods. However, the morphologies of nano-scaled CuO were likely bulbs and flake nanostructures. This approach could prepare CuO and ZnO nanostructures on a brass substrate without size limitations. The possible growth mechanisms and structure of nano-scaled CuO and ZnO are discussed in this paper. The simplicity of the preparation procedure and the potential technological of the product were be interested in this study.

scholarly journals Evolution of the Surface Wettability of PET Polymer upon Treatment with an Atmospheric-Pressure Plasma Jet

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 87 ◽  
Author(s):  
Alenka Vesel ◽  
Rok Zaplotnik ◽  
Gregor Primc ◽  
Miran Mozetič
Keyword(s):  
Photoelectron Spectroscopy ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Surface Wettability ◽  
Surface Activation ◽  
Atmospheric Pressure Plasma Jet ◽  
Pressure Plasma ◽  
High Impedance ◽  
Glowing Discharge

A useful technique for pre-treatment of polymers for improved biocompatibility is surface activation. A method for achieving optimal wettability at a minimal thermal load and unwanted modifications of the polymer properties is elaborated in this paper. Samples of polyethylene terephthalate polymer were exposed to an atmospheric-pressure plasma jet created by a high-impedance low-frequency discharge in wet argon. Different treatment times and distances from the end of the glowing discharge enabled detailed investigation of the evolution of surface activation. A rather fast saturation of the surface wettability over the area of the order of cm2 was observed upon direct treatment with the glowing discharge. At a distance of few mm from the glowing discharge, the activation was already two orders of magnitude lower. Further increase of the distance resulted in negligible surface effects. In the cases of a rapid activation, very sharp interphase between the activated and unaffected surface was observed and explained by peculiarities of high-impedance discharges sustained in argon with the presence of impurities of water vapor. Results obtained by X-ray photoelectron spectroscopy confirmed that the activation was a consequence of functionalization with oxygen functional groups.

Influence of Atmospheric Pressure Plasma Pre-Treatment on Sodium Bicarbonate Desizing of Polyacrylate on PET Fabrics

2011 ◽  
Vol 331 ◽  
pp. 718-721 ◽  
Author(s):  
Xu Ming Li ◽  
Yi Ping Qiu
Keyword(s):  
Plasma Treatment ◽  
Photoelectron Spectroscopy ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Sem Analysis ◽  
X Ray ◽  
Pressure Plasma ◽  
Pre Treatment ◽  
Scanning Electron

The influence of He/O2 atmospheric pressure plasma jet (APPJ) treatment on subsequent wet desizing of polyarylate from PET fabrics was studied in present paper. Scanning electron microscopy (SEM) analysis showed an increased surface roughness after the plasma treatment. And SEM results also showed that the fiber surfaces were as clean as unsized fibers surfaces after 35s treatment followed by NaHCO3 desizing. X-ray photoelectron spectroscopy (XPS) analysis indicated that oxygen-based functional groups increased for the plasma treated polyacrylate sized fabrics. The percent desizing ratio (PDR) results showed that more than 99% PDR was achieved after 65s plasma treatment followed by a 5min NaHCO3 desizing.

A new approach to surface activation of porous nanomaterials using non-thermal helium atmospheric pressure plasma jet treatment

2017 ◽  
Vol 53 (50) ◽  
pp. 6704-6707 ◽  
Author(s):  
Farkfun Duriyasart ◽  
Masataka Ohtani ◽  
Jun-Seok Oh ◽  
Akimitsu Hatta ◽  
Kazuya Kobiro
Keyword(s):  
Surface Properties ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Surface Activation ◽  
Atmospheric Pressure Plasma Jet ◽  
Optimum Conditions ◽  
New Approach ◽  
Pressure Plasma ◽  
Porous Nanomaterials

Facile treatment of mesoporous nanomaterials by a helium APPJ under optimum conditions activates the surface of the materials by removing contaminants without damaging their morphologies and surface properties.

scholarly journals Influence of Non-Thermal Atmospheric Pressure Plasma Jet on Extracellular Activity of α-Amylase in Aspergillus oryzae

2021 ◽  
Vol 11 (2) ◽  
pp. 691
Author(s):  
Mayura Veerana ◽  
Eun Ha Choi ◽  
Gyungsoon Park
Keyword(s):  
Plasma Treatment ◽  
Spore Germination ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Amylase Secretion ◽  
Atmospheric Pressure Plasma Jet ◽  
Base Pairs ◽  
Pressure Plasma ◽  
Extracellular Activity

In a previous study, we found that plasma can enhance spore germination and α-amylase secretion in A. oryzae, a beneficial fungus used in fermentation. To confirm this, in the current study, we investigated the effects of plasma on development and α-amylase secretion using an enlarged sample size and a different plasma source: a plasma jet. There was a ~10% (p < 0.01) increase in spore germination upon non-thermal atmospheric pressure plasma jet (NTAPPJ) treatment for 5 min and 10 min, as compared with the control (no plasma treatment). The activity of α-amylase detected in potato dextrose broth (PDB) media during incubation was significantly elevated in plasma-treated samples, with a more obvious increase upon 10 min and 15 min treatments and 24–96 h incubation periods. The levels of the oxidation reduction potential (ORP) and NOX (nitrogen oxide species) were higher in the plasma-treated samples than in the control samples, suggesting that these two variables could serve as standard indicators for enhancing α-amylase activity after plasma treatment. Genome sequencing analysis showed approximately 0.0016–0.0017% variations (changes in 596–655 base pairs out of a total of 37,912,014 base pairs) in the genomic DNA sequence of A. oryzae after plasma treatment. Our results suggest that NATPPJ can enhance the spore germination and extracellular activity of α-amylase, probably by increasing the levels of ORP and NOX to an optimum level.

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