scholarly journals Surface Modification of FeCoNiCr Medium-Entropy Alloy (MEA) Using Octadecyltrichlorosilane and Atmospheric-Pressure Plasma Jet

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 788
Author(s):  
Pei-Yu Cheng ◽  
Nian-Hu Lu ◽  
Yi-Sheng Lu ◽  
Chih-Hsuan Chen ◽  
Yueh-Lien Lee ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Surface Modification ◽  
Photoelectron Spectroscopy ◽  
Atmospheric Pressure ◽  
Electrochemical Impedance ◽  
Surface Condition ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Atmospheric Pressure Plasma Jet ◽  
Pressure Plasma

Surface condition and corrosion resistance are major concerns when metallic materials are going to be utilized for applications. In this study, FeCoNiCr medium-entropy alloy (MEA) is first treated with a nitrogen atmospheric-pressure plasma jet (APPJ) and then coated with octadecyltrichlorosilane (OTS) for the surface modification. The hydrophobicity of the FeCoNiCr MEA was effectively improved by OTS-coating treatment, APPJ treatment, or the combination of both treatments (OTS-coated APPJ-treated), which increased the water contact angle from 54.49° of the bare MEA to 70.56°, 93.94°, and 88.42°, respectively. Potentiodynamic polarization and electrochemical impedance spectroscopy tests demonstrate that the APPJ-treated FeCoNiCr MEA exhibits the best anti-corrosion properties. X-ray photoelectron spectroscopy reveals that APPJ treatment at 700 °C oxidizes all the alloying elements in the FeCoNiCr MEA, which demonstrates that a short APPJ treatment of two-minute is effective in forming a metal oxide layer on the surface to improve the corrosion resistance of FeCoNiCr MEA. These results provide a convenient and rapid method for improving surface properties of FeCoNiCr MEA.

scholarly journals Time Evolution Characterization of Atmospheric-Pressure Plasma Jet (APPJ)-Synthesized Pt-SnOx Catalysts

Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 690 ◽  
Author(s):  
Chia-Chun Lee ◽  
Tzu-Ming Huang ◽  
I-Chun Cheng ◽  
Cheng-Che Hsu ◽  
Jian-Zhang Chen
Keyword(s):  
Time Evolution ◽  
Photoelectron Spectroscopy ◽  
Atmospheric Pressure ◽  
Electrochemical Impedance ◽  
Atmospheric Pressure Plasma ◽  
Precursor Solution ◽  
Plasma Jet ◽  
Atmospheric Pressure Plasma Jet ◽  
Counter Electrodes ◽  
Pressure Plasma

We characterize the time evolution (≤120 s) of atmospheric-pressure plasma jet (APPJ)-synthesized Pt-SnOx catalysts. A mixture precursor solution consisting of chloroplatinic acid and tin(II) chloride is spin-coated on fluorine-doped tin oxide (FTO) glass substrates, following which APPJ is used for converting the spin-coated precursors. X-ray photoelectron spectroscopy (XPS) indicates the conversion of a large portion of metallic Pt and a small portion of metallic Sn (most Sn is in oxidation states) from the precursors with 120 s APPJ processing. The dye-sensitized solar cell (DSSC) efficiency with APPJ-synthesized Pt-SnOx CEs is improved greatly with only 5 s of APPJ processing. Electrochemical impedance spectroscopy (EIS) and Tafel experiments confirm the catalytic activities of Pt-SnOx catalysts. The DSSC performance can be improved with a short APPJ processing time, suggesting that a DC-pulse nitrogen APPJ can be an efficient tool for rapidly synthesizing catalytic Pt-SnOx counter electrodes (CEs) for DSSCs.

scholarly journals Uniform surface modification of polyethylene terephthalate (PET) by atmospheric pressure plasma jet with a horn-like nozzle

2018 ◽  
Vol 352 ◽  
pp. 338-347 ◽  
Author(s):  
Taiana She Mir Mui ◽  
Rogério Pinto Mota ◽  
Antje Quade ◽  
Luis Rogério de Oliveira Hein ◽  
Konstantin Georgiev Kostov
Keyword(s):  
Surface Modification ◽  
Polyethylene Terephthalate ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Atmospheric Pressure Plasma Jet ◽  
Pressure Plasma

scholarly journals Improvement of hydrophilicity of polyamide using atmospheric pressure plasma jet

BIBECHANA ◽  
2020 ◽  
Vol 17 ◽  
pp. 133-138 ◽  
Author(s):  
H B Baniya ◽  
R P Guragain ◽  
B Baniya ◽  
G Qin ◽  
D P Subedi
Keyword(s):  
Material Processing ◽  
Surface Modification ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Polymeric Materials ◽  
Plasma Jet ◽  
Angle Measurement ◽  
Atmospheric Pressure Plasma Jet ◽  
High Voltage Power Supply ◽  
Pressure Plasma

Atmospheric Pressure Plasma Jet (APPJ) has many applications in material processing such as surface modification and biomedical material processing. APPJ has been generated by a high voltage power supply (0-20 KV) at an operating frequency of (20-30) 23 kHz. This paper reports the generation and characterization of APPJ in Argon environment and its application in the surface modification of polymeric materials. The discharge has been characterized by optical and electrical methods. In order to characterize the plasma jet, its electron temperature and electron density has been determined by optical emissions spectroscopy. The surface properties of the untreated and plasma treated Polyamide (PA) samples were characterized by contact angle measurement and surface energy analysis. BIBECHANA 17 (2020) 133-138

scholarly journals Generation and Characterization of an Atmospheric-Pressure Plasma Jet (APPJ) and Its Application in the Surface Modification of Polyethylene Terephthalate

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Hom Bahadur Baniya ◽  
Rajendra Shrestha ◽  
Rajesh Prakash Guragain ◽  
Mohan Bahadur Kshetri ◽  
Bishnu Prasad Pandey ◽  
...  
Keyword(s):  
Material Processing ◽  
Surface Modification ◽  
Polyethylene Terephthalate ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Film Deposition ◽  
Atmospheric Pressure Plasma Jet ◽  
Pressure Plasma

An atmospheric-pressure plasma jet (APPJ) has a lot of applications in recent years such as in material processing, surface modification, biomedical material processing, and thin film deposition. APPJ has been generated by a high-voltage power supply (0-20 kV) at an operating frequency of 27 kHz. This paper reports the generation and characterization of APPJ in argon environment and its application in the surface modification of polyethylene terephthalate (PET). The plasma jet has been characterized by electrical and optical methods. In order to characterize the plasma jet, electron density and electron temperature have been determined. The surface roughness of the untreated and plasma-treated PET samples was characterized by contact angle measurement, surface energy analysis, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and atomic force microscopy (AFM).

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