Influence of atmospheric pressure argon plasma treatment on the quality of peanut oil

2017 ◽  
Vol 119 (11) ◽  
pp. 1600513 ◽  
Author(s):  
Cuirong Ren ◽  
Guoqing Huang ◽  
Shiqing Wang ◽  
Junxia Xiao ◽  
Xubo Xiong ◽  
...  
Keyword(s):  
Plasma Treatment ◽  
Atmospheric Pressure ◽  
Argon Plasma ◽  
Peanut Oil

Modification Effects in Argon Plasma Treated S1O2 Spin-On Glass

1995 ◽  
Vol 381 ◽  
Author(s):  
Min Park ◽  
Joong Whan Lee ◽  
Jin Gun Koo ◽  
Kyung Soo Kim ◽  
Hyung Joun Yoo ◽  
...  
Keyword(s):  
Plasma Treatment ◽  
Treatment Time ◽  
Argon Plasma ◽  
Treatment Temperature ◽  
Adsorption Sites ◽  
Long Time ◽  
As Adsorption ◽  
Wet Etch

AbstractWe demonstrated that the quality of siloxane spin-on glass (SOG) films, widely used as interlevel planarization dielectrics, is improved significantly by curing in argon plasma. The wet etch rate of SOG film decreases with increasing plasma treatment temperature or treatment time, and is much lower than that cured in a furnace. Long-time plasma treatment reduces the density of silanols (Si-OH) and methyl (−CH3) group, which act as adsorption sites of water. The results were compared with those obtained from the N2O (or H2 ) plasma treated SOG films. The modification of the SOG film by Ar plasma is related to the radiation damage and the reconstruction of the atomic structure during the plasma exposure. The role of metastable Ar (Ar*) appears to be very important to improve the SOG film; SOG film is more relaxed by the energy released from the conversion of Ar* to Ar.

Sterilization of microorganisms in silk fabrics by microwave-induced argon plasma treatment at atmospheric pressure

2008 ◽  
Vol 202 (22-23) ◽  
pp. 5773-5778 ◽  
Author(s):  
Dong Jeong Park ◽  
Mi Hee Lee ◽  
Yeon I Woo ◽  
Dong-Wook Han ◽  
Jae Bong Choi ◽  
...  
Keyword(s):  
Plasma Treatment ◽  
Atmospheric Pressure ◽  
Argon Plasma ◽  
Silk Fabrics

Low-temperature atmospheric pressure argon plasma treatment and hybrid laser-plasma ablation of barite crown and heavy flint glass

2012 ◽  
Vol 51 (17) ◽  
pp. 3847 ◽  
Author(s):  
Christoph Gerhard ◽  
Sophie Roux ◽  
Stephan Brückner ◽  
Stephan Wieneke ◽  
Wolfgang Viöl
Keyword(s):  
Low Temperature ◽  
Plasma Treatment ◽  
Laser Plasma ◽  
Atmospheric Pressure ◽  
Argon Plasma ◽  
Flint Glass ◽  
Plasma Ablation

scholarly journals Biocide Effect of Non-Thermal Atmospheric Pressure Plasma

2021 ◽  
Vol 51 (1) ◽  
pp. 86-97
Author(s):  
Daria Petrukhina ◽  
Irina Polyakova ◽  
Sergei Gorbatov
Keyword(s):  
Plasma Treatment ◽  
Atmospheric Pressure ◽  
Nutrient Medium ◽  
Argon Plasma ◽  
Atmospheric Pressure Plasma ◽  
Petri Dish ◽  
Plasma Generator ◽  
Plasma Radiation ◽  
Pressure Plasma ◽  
Petri Dishes

Introduction. New methods of sterilization with non-thermal atmospheric pressure plasma remain an extremely relevant field of food science. The present research estimated the effect of non-thermal argon plasma on lactic acid bacteria obtained from walnuts. Study objects and method. The non-thermal argon plasma was generated by electrode discharge induced by a coaxial microwave plasmatron at atmospheric pressure. The discharge was generated in a special electrode construction. Its stability was achieved via low gas flow through the discharge gap. Argon consumption was 10 L/min. The study involved Lactobacillus plantarum and Lactobacillus mali in their natural association and vegetative form. Endo’s medium (Endo agar) was inoculated with lactobacilli. 100 μl of the suspension were added into a Petri dish with nutrient medium and carefully rubbed with a spreader. The plates with Endo agar inoculated with lactobacilli were placed under plasma radiation at a distance of 45 mm. The biocidal effect of plasma radiation was estimated by the diameter of the affected areas. After the plasma treatment, the Petri dishes were incubated in an incubator for 24–48 h at 37°C, after which the diameters of the affected areas were measured again. Results and discussion. The paper introduces experimental data on the effect of argon plasma on lactobacilli isolated from food. After treating the surface of inoculated Petri dishes with non-thermal plasma for five minutes, the diameter of the inhibition zone reached the diameter of a Petri dish (80 mm) and exceeded the diameter of the spark gap of the plasma generator (36 mm). The temperature on the surface of the nutrient medium during plasma treatment was within the optimal temperature for lactobacillus growth, i.e. 37.3 ± 0.6°C, which excluded thermal effects. Only a few colonies survived a five-minute treatment. After one-minute treatment, the number of survived colony-forming units was considerably higher. Conclusion. Non-thermal argon plasma treatment proved effective in inhibiting the growth of gram-positive bacteria (Lactobacillus isolated from walnuts) on solid surfaces (agar plates). After five minutes of plasma treatment, the inactivated area (80 mm) exceeded the anode electrode cross section (36 mm) of the plasma generator.

scholarly journals Characterization of Ag-exchanged clinoptilolite treated with a plasma jet at atmospheric pressure

Clay Minerals ◽  
2020 ◽  
pp. 1-10
Author(s):  
Sedef Dikmen ◽  
Neslihan Şahin ◽  
Zafer Dikmen ◽  
Murat Tanışlı
Keyword(s):  
Plasma Treatment ◽  
Atmospheric Pressure ◽  
Structural Changes ◽  
Diffuse Reflectance Spectroscopy ◽  
Argon Plasma ◽  
Plasma Jet ◽  
Morphological Properties ◽  
X Ray ◽  
Functional Changes ◽  
Xrd Patterns

Abstract This study reports on the effects of dielectric barrier discharge-like (DBD-like) plasma jet treatment at atmospheric pressure on Ag cation-exchanged clinoptilolite. In the plasma treatment process, argon plasma was applied to the surface of pellet samples prepared with Ag-clinoptilolite. After DBD-like plasma jet treatment for 30 and 60 min, remarkable colour changes were observed in the pellet samples. These changes indicate that the DBD-like plasma jet application led to the successful reduction of Ag+ to its metallic forms, which was further confirmed by the results of ultraviolet–visible diffuse reflectance spectroscopy. The structural, composition and morphological properties of the DBD-like plasma jet-treated samples were characterized using Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy and energy-dispersive X-ray analyses, and they were compared to the untreated Ag-clinoptilolite. The DBD-like plasma jet treatment caused no detectable structural changes in clinoptilolite within the analytical limitations of the methods used. The FTIR spectra show that the plasma treatment causes discharge-induced functional changes in the hydroxyl stretching region. The peaks appearing in the XRD patterns confirmed the reduction of Ag+ to Ag0 after exposure to the plasma. The present study indicates that the reduction of Ag+ cations to their metallic forms can be performed successfully using the proposed method without collapsing the crystal structure of the Ag-clinoptilolite.

Surface compositional changes in GaAs subjected to argon plasma treatment

2002 ◽  
Vol 202 (3-4) ◽  
pp. 183-198 ◽  
Author(s):  
C.C Surdu-Bob ◽  
J.L Sullivan ◽  
S.O Saied ◽  
R Layberry ◽  
M Aflori
Keyword(s):  
Plasma Treatment ◽  
Argon Plasma ◽  
Compositional Changes

scholarly journals Enhanced Wetting and Adhesive Properties by Atmospheric Pressure Plasma Surface Treatment Methods and Investigation Processes on the Influencing Parameters on HIPS Polymer

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 901
Author(s):  
Miklós Berczeli ◽  
Zoltán Weltsch
Keyword(s):  
Surface Treatment ◽  
Plasma Treatment ◽  
Atmospheric Pressure ◽  
High Impact ◽  
Plasma Parameters ◽  
Plasma Surface ◽  
Wetting Properties ◽  
High Impact Polystyrene ◽  
Process Modification ◽  
Plasma Surface Treatment

The development of bonding technology and coating technologies require the use of modern materials and topologies for the demanding effect and modification of their wetting properties. For the industry, a process modification process that can be integrated into a process is the atmospheric pressure of air operation plasma surface treatment. This can be classified and evaluated based on the wettability, which has a significant impact on the adhesive force. The aim is to improve the wetting properties and to find the relationship between plasma treatment parameters, wetting, and adhesion. High Impact PolyStyrene (HIPS) was used as an experimental material, and then the plasma treatment can be treated with various adjustable parameters. The effect of plasma parameters on surface roughness, wetting contact angle, and using Fowkes theory of the surface energy have been investigated. Seven different plasma jet treatment distances were tested, combined with 5 scan speeds. Samples with the best plasma parameters were prepared from 25 mm × 25 mm overlapping adhesive joints using acrylic/cyanoacrylate. The possibility of creating a completely hydrophilic surface was achieved, where the untreated wetting edge angle decreased from 88.2° to 0° for distilled water and from 62.7° to 0° in the case of ethylene glycol. The bonding strength of High Impact PolyStyrene was increased by plasma treatment by 297%.

scholarly journals Surface modification of PMMA polymer and its composites with PC61BM fullerene derivative using an atmospheric pressure microwave argon plasma sheet

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Andrzej Sikora ◽  
Dariusz Czylkowski ◽  
Bartosz Hrycak ◽  
Magdalena Moczała-Dusanowska ◽  
Marcin Łapiński ◽  
...  
Keyword(s):  
Contact Angle ◽  
Surface Modification ◽  
Chemical Composition ◽  
Water Contact Angle ◽  
Plasma Sheet ◽  
Atmospheric Pressure ◽  
Argon Plasma ◽  
Fullerene Derivative ◽  
Water Contact ◽  
Pmma Polymer

AbstractThis paper presents the results of experimental investigations of the plasma surface modification of a poly(methyl methacrylate) (PMMA) polymer and PMMA composites with a [6,6]-phenyl-C61-butyric acid methyl ester fullerene derivative (PC61BM). An atmospheric pressure microwave (2.45 GHz) argon plasma sheet was used. The experimental parameters were: an argon (Ar) flow rate (up to 20 NL/min), microwave power (up to 530 W), number of plasma scans (up to 3) and, the kind of treated material. In order to assess the plasma effect, the possible changes in the wettability, roughness, chemical composition, and mechanical properties of the plasma-treated samples’ surfaces were evaluated by water contact angle goniometry (WCA), atomic force microscopy (AFM), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS). The best result concerning the water contact angle reduction was from 83° to 29.7° for the PMMA material. The ageing studies of the PMMA plasma-modified surface showed long term (100 h) improved wettability. As a result of plasma treating, changes in the samples surface roughness parameters were observed, however their dependence on the number of plasma scans is irregular. The ATR-FTIR spectra of the PMMA plasma-treated surfaces showed only slight changes in comparison with the spectra of an untreated sample. The more significant differences were demonstrated by XPS measurements indicating the surface chemical composition changes after plasma treatment and revealing the oxygen to carbon ratio increase from 0.1 to 0.4.

Comparative studies of nitrogen plasma and argon plasma treatment on the strength of PBO fibre reinforced high-temperature resistant thermoplastic composite

2021 ◽  
pp. 095400832098729
Author(s):  
K Sudheendra ◽  
Jennifer Vinodhini ◽  
M Govindaraju ◽  
Shantanu Bhowmik
Keyword(s):  
Contact Angle ◽  
High Temperature ◽  
Plasma Treatment ◽  
Sessile Drop ◽  
Dynamic Contact Angle ◽  
Argon Plasma ◽  
Film Surface ◽  
Fibre Surface ◽  
Nitrogen Plasma ◽  
Thermoplastic Composite

The study involves the processing of a novel poly [1, 4-phenylene-cis-benzobisoxazole] (PBO) fibre reinforced high-temperature thermoplastic composite with polyaryletherketone (PAEK) as the matrix. The PBO fibre and the PAEK film surface was modified using the method of argon and nitrogen plasma treatment. The investigation primarily focuses on evaluating the tensile properties of the fabricated laminates and correlating it with the effect of plasma treatment, surface characteristics, and its fracture surface. A 5% decrease in tensile strength was observed post argon plasma treatment while a 27% increase in strength was observed post nitrogen plasma treatment. The morphology of the failure surface was investigated by scanning electron microscopy and an interfacial failure was observed. Furthermore, the effect of plasma on the wettability of PBO fibres and PAEK film surface was confirmed by the Dynamic Contact Angle analysis and sessile drop method respectively. FTIR spectral analysis was done to investigate the effect of plasma treatment on the chemical structure on the surface. The results of the wettability study showed that the argon plasma treatment of the fibre surface increased its hydrophobicity while nitrogen plasma treatment resulted in the reduction of contact angle.

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