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Journal articles on the topic 'Low pressure plasma treatment'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 February 2022

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1

Pivovarov, Oleksandr, Tetiana Derkach, and Margarita Skiba. "Low-Pressure Discharge Plasma Treatment of Aqueous Solutions with Mn, Cr and Fe." Chemistry & Chemical Technology 13, no. 3 (July 15, 2019): 317–25. http://dx.doi.org/10.23939/chcht13.03.317.

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2

Kuwabara, Atsushi, Shin-ichi Kuroda, and Hitoshi Kubota. "Polymer Surface Treatment by Atmospheric Pressure Low Temperature Surface Discharge Plasma: Its Characteristics and Comparison with Low Pressure Oxygen Plasma Treatment." Plasma Science and Technology 9, no. 2 (April 2007): 181–89. http://dx.doi.org/10.1088/1009-0630/9/2/14.

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3

Gu, Bongjun, Dongwook Ko, Sungjin Jo, Dong Choon Hyun, Hyeon-Ju Oh, and Jongbok Kim. "Effect of Low-Pressure Plasma Treatment Parameters on Wrinkle Features." Materials 13, no. 17 (September 1, 2020): 3852. http://dx.doi.org/10.3390/ma13173852.

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Wrinkles attract significant attention due to their ability to enhance the mechanical and optical characteristics of various optoelectronic devices. We report the effect of the plasma gas type, power, flow rate, and treatment time on the wrinkle features. When an optical adhesive was treated using a low-pressure plasma of oxygen, argon, and nitrogen, the oxygen and argon plasma generated wrinkles with the lowest and highest wavelengths, respectively. The increase in the power of the nitrogen and oxygen plasma increased the wavelengths and heights of the wrinkles; however, the increase in the power of the argon plasma increased the wavelengths and decreased the heights of the wrinkles. Argon molecules are heavier and smaller than nitrogen and oxygen molecules that have similar weights and sizes; moreover, the argon plasma comprises positive ions while the oxygen and nitrogen plasma comprise negative ions. This resulted in differences in the wrinkle features. It was concluded that a combination of different plasma gases could achieve exclusive control over either the wavelength or the height and allow a thorough analysis of the correlation between the wrinkle features and the characteristics of the electronic devices.

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4

Listratov, Sergey. "Technologies of plasma treatment of contact lenses." Eye 125, no. 2019-1 (2019): 41–44. http://dx.doi.org/10.33791/2222-4408-2019-1-41-44.

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Plasma cleaning is considered to be an accurate cleaning method for high-quality applications in medical production. Differences of low-pressure and atmospheric pressure plasma technologies were analyzed. The main purpose of low-pressure plasma cleaning is the removal of thin organic films from surfaces. The positive effect of plasma treatment on the structure of gas permeable contact lenses surface is described in the article. Plasma cleaning, however, is the most suitable process for achieving optimum surface cleanliness. The given data was obtained by practical means.

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5

Behnisch, J., A. Holländer, and H. Zimmermann. "Controlled Functionalization of Polymer Surfaces by Low Pressure Plasma Treatment." International Journal of Polymeric Materials 23, no. 3-4 (February 1994): 215–24. http://dx.doi.org/10.1080/00914039408029333.

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6

Aksenov, I. I., and V. M. Khoroshikh. "Treatment of Materials in Radial Low-Pressure Arc Plasma Streams." Materials Science Forum 287-288 (August 1998): 295–98. http://dx.doi.org/10.4028/www.scientific.net/msf.287-288.295.

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7

Koo, Il Gyo, Myoung Seok Lee, and Woong Moo Lee. "Low temperature plasma-chemical treatment of PdCl2 film by atmospheric pressure hydrogen plasma." Thin Solid Films 506-507 (May 2006): 350–54. http://dx.doi.org/10.1016/j.tsf.2005.08.347.

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8

Li, Ru, Ji Fei Deng, and Fen Fen Liu. "Surface Modification of the Polyethersulfone Membrane by Low Pressure Argon Plasma Treatment." Applied Mechanics and Materials 268-270 (December 2012): 510–13. http://dx.doi.org/10.4028/www.scientific.net/amm.268-270.510.

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In this study, low pressure Ar plasma is used to improve the surface hydrophilicity of the polyethersulfone (PES) membrane. The low pressure Ar plasma generated by radio frequency (RF) glow discharge was acted on the PES membrane surface to observe the change of the hydrophilic nature. This paper discusses the different plasma power, treatment time and plasma fluxes conditions on PES membrane modified influence. Experimental results show that with the plasma power and plasma fluxes increase and treatment time prolonged, the surface hydrophilicity of the PES membrane continues to increase and no more changes were observed when it reached to a certain value. The best condition was carried out at 60W, 120s, 20sccm, in this condition, the hydrophilic nature of the PES membrane is remarkably improved.

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9

Kwong, C. H., S. P. Ng, and C. W. Kan. "Improvement on Hydrophobicity of Synthetic Textiles by Plasma Treatment – A Review." Research Journal of Textile and Apparel 18, no. 4 (November 1, 2014): 1–14. http://dx.doi.org/10.1108/rjta-18-04-2014-b001.

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Plasma treatment is becoming increasingly popular in enhancing the hydrophobicity of synthetic textiles. In recent years, the study of surface hydrophobisation by means of plasma treatment, under low or atmospheric pressure, has drawn a great deal of attention. A large amount of research has reported on the possibility of applying this technique with merits that include a dry process, reduced pollution, a single step treatment, etc. In this regard, this paper reviews recent approaches on enhancing the hydrophobicity of synthetic textiles by means of plasma treatment. The basic working principle of generating plasma to enhance hydrophobicity is explained. Both low and atmospheric plasma treatments are introduced. A higher cost is usually required for low pressure plasma because of the investment on a vacuum chamber. On the other hand, carrier gas is required for atmospheric plasma treatment, which is not the case for low pressure plasma. The experimental set up and the chemicals involved in the processes are discussed. In order to enhance surface hydrophobicity, fluorocarbons are always applied, such as perfluoroalkylacrylate, perfluorodecaline and tetrafluoroethylene.

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10

Chuangsuwanich, Apirag, Tananchai Assadamongkol, and Dheerawan Boonyawan. "The Healing Effect of Low-Temperature Atmospheric-Pressure Plasma in Pressure Ulcer." International Journal of Lower Extremity Wounds 15, no. 4 (September 20, 2016): 313–19. http://dx.doi.org/10.1177/1534734616665046.

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Pressure ulcers are difficult to treat. Recent reports of low-temperature atmospheric-pressure plasma (LTAPP) indicated its safe and effectiveness in chronic wound care management. It has been shown both in vitro and vivo studies that LTAPP not only helps facilitate wound healing but also has antimicrobial efficacy due to its composition of ion and electron, free radicals, and ultraviolet ray. We studied the beneficial effect of LTAPP specifically on pressure ulcers. In a prospective randomized study, 50 patients with pressure ulcers were divided into 2 groups: Control group received standard wound care and the study group was treated with LTAPP once every week for 8 consecutive weeks in addition to standard wound care. We found that the group treated with LTAPP had significantly better PUSH (Pressure Ulcer Scale for Healing) scores and exudate amount after 1 week of treatment. There was also a reduction in bacterial load after 1 treatment regardless of the species of bacteria identified.

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11

Nejman, Alicja, Irena Kamińska, Izabela Jasińska, Grzegorz Celichowski, and Małgorzata Cieślak. "Influence of Low-Pressure RF Plasma Treatment on Aramid Yarns Properties." Molecules 25, no. 15 (July 30, 2020): 3476. http://dx.doi.org/10.3390/molecules25153476.

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The aim of the study was to modify the surface free energy (SFE) of meta- (mAr) and para-aramid (pAr) yarns by their activation in low-pressure air radio frequency (RF) (40 kHz) plasma and assessment of its impact on the properties of the yarns. After 10 and 90 min of activation, the SFE value increased, respectively, by 14% and 37% for mAr, and by 10% and 37% for pAr. The value of the polar component increased, respectively by 22% and 57% for mAr and 20% and 62% for pAr. The value of the dispersion component for mAr and pAr increased respectively by 9% and 25%. The weight loss decreased from 49% to 46% for mAr and 62% to 50% for pAr after 90 min of activation. After 90 min, the specific strength for mAr did not change and for pAr it decreased by 40%. For both yarns, the 10 min activation in plasma is sufficient to prepare their surface for planned nanomodification.

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12

IHARA, Tatuhiko, Seisir^ ^ocirc; IT^|^Ocirc;, Tosihide KUWAHARA, and Mitsuo KIBOKU. "Pressure Change in Low Temperature Plasma Oxidization Treatment of Carbon Black." Journal of the Japan Society of Colour Material 59, no. 6 (1986): 320–27. http://dx.doi.org/10.4011/shikizai1937.59.320.

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13

Gorokhovsky, V., and P. Del Bel Belluz. "Ion treatment by low pressure arc plasma immersion surface engineering processes." Surface and Coatings Technology 215 (January 2013): 431–39. http://dx.doi.org/10.1016/j.surfcoat.2012.10.069.

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14

GAIDAU, CARMEN, MIHAELA NICULESCU, LILIOARA SURDU, LAURENTIU DINCA, and IONEL BARBU. "Improved properties of wool on sheepskins by low pressure plasma treatment." Industria Textila 68, no. 3 (July 1, 2017): 193–96. http://dx.doi.org/10.35530/it.068.03.1368.

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15

Mühlhan, C., St Weidner, J. Friedrich, and H. Nowack. "Improvement of bonding properties of polypropylene by low-pressure plasma treatment." Surface and Coatings Technology 116-119 (September 1999): 783–87. http://dx.doi.org/10.1016/s0257-8972(99)00203-0.

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16

Gouveia, Isabel C., Laura C. Antunes, and Ana P. Gomes. "Low‐pressure plasma treatment for hydrophilization of poly(ethylene terephthalate) fabrics." Journal of the Textile Institute 102, no. 3 (March 2011): 203–13. http://dx.doi.org/10.1080/00405001003616777.

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17

Nowak, S., H. P. Haerri, L. Schlapbach, and J. Vogt. "Surface analysis and adhesion of polypropylene after low-pressure plasma treatment." Surface and Interface Analysis 16, no. 1-12 (July 1990): 418–23. http://dx.doi.org/10.1002/sia.740160187.

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18

Hur, Min, Jae Ok Lee, Woo Seok Kang, and Young-Hoon Song. "Low-Pressure Plasma After-Treatment of Pollutants Emitted During Semiconductor Manufacturing." Plasma Processes and Polymers 12, no. 6 (May 21, 2015): 583–93. http://dx.doi.org/10.1002/ppap.201500046.

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19

Fumagalli, F., O. Kylián, L. Amato, J. Hanuš, and F. Rossi. "Low-pressure water vapour plasma treatment of surfaces for biomolecules decontamination." Journal of Physics D: Applied Physics 45, no. 13 (March 15, 2012): 135203. http://dx.doi.org/10.1088/0022-3727/45/13/135203.

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20

Kikani, P., B. Desai, S. Prajapati, P. Arun, N. Chauhan, and S. K. Nema. "Comparison of low and atmospheric pressure air plasma treatment of polyethylene." Surface Engineering 29, no. 3 (April 2013): 211–21. http://dx.doi.org/10.1179/1743294413y.0000000111.

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21

Sanchis, M. R., V. Blanes, M. Blanes, D. Garcia, and R. Balart. "Surface modification of low density polyethylene (LDPE) film by low pressure O2 plasma treatment." European Polymer Journal 42, no. 7 (July 2006): 1558–68. http://dx.doi.org/10.1016/j.eurpolymj.2006.02.001.

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22

KOMVOPOULOS, K. "PLASMA-ENHANCED SURFACE MODIFICATION OF LOW LINEAR-DENSITY POLYETHYLENE CATHETERS." Journal of Mechanics in Medicine and Biology 01, no. 01 (May 2001): 17–31. http://dx.doi.org/10.1142/s0219519401000064.

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Modification of the surface chemistry, topography, and frictional characteristics of medical-grade low linear-density polyethylene catheters with various plasma chemistries was accomplished in a radio-frequency (RF) vacuum chamber. Two different types of plasma treatments were examined. For surface texturing and chemistry modification, the catheters were treated with either He or CF 4 gases for 0.5–60 min at RF power in the range of 30–1000 W and working pressure between 0.2 and 2 Torr. For grafting of a low friction film, the catheters were exposed to pure Ar plasma at 400 W for 2 min (surface cleaning) and then to CH 4, CH 4/ CF 4, or H 2/ CF 4 plasmas at power of 250–550 W and working pressure of 0.2–0.8 Torr for 10–60 min (surface modification). The effects of the different plasma treatments on the surface texture, chemical behavior, and friction characteristics of the catheters are discussed in light of results obtained from contact surface profilometry, scanning electron microscopy, atomic force microscopy, contact angle measurements, infrared spectroscopy, and friction experiments. The findings of this study demonstrate that surface crosslinking and grafting of desirable functional groups by RF plasma treatment is an effective low-temperature surface modification technique for polymeric medical devices.

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23

Holländer, A., and J. Behnisch. "Low pressure plasma treatments inside a closed package." Surface and Coatings Technology 142-144 (July 2001): 1074–77. http://dx.doi.org/10.1016/s0257-8972(01)01317-2.

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24

Huc, Tomasz, Adrian Drapala, Marta Gawrys, Marek Konop, Klaudia Bielinska, Ewelina Zaorska, Emilia Samborowska, et al. "Chronic, low-dose TMAO treatment reduces diastolic dysfunction and heart fibrosis in hypertensive rats." American Journal of Physiology-Heart and Circulatory Physiology 315, no. 6 (December 1, 2018): H1805—H1820. http://dx.doi.org/10.1152/ajpheart.00536.2018.

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Several studies have suggested negative effects of trimethylamine oxide (TMAO) on the circulatory system. However, a number of studies have shown protective functions of TMAO, a piezolyte and osmolyte, in animals exposed to high hydrostatic and/or osmotic stress. We evaluated the effects of TMAO treatment on the development of hypertension and its complications in male spontaneously hypertensive rats (SHRs) maintained on water (SHR-Water) and SHRs drinking TMAO water solution from weaning (SHR-TMAO). Wistar-Kyoto (WKY) rats were used as normotensive controls to discriminate between age-dependent and hypertension-dependent changes. Telemetry measurements of blood pressure were performed in rats between the 7th and 16th weeks of life. Anesthetized rats underwent echocardiographic, electrocardiographic, and direct left ventricular end-diastolic pressure (LVEDP) measurements. Hematoxylin and eosin as well as van Gieson staining for histopathological evaluation were performed. Plasma TMAO measured by chromatography coupled with mass spectrometry was significantly higher in the SHR-Water group compared with the WKY group (~20%). TMAO treatment increased plasma TMAO by four- to fivefold and did not affect the development of hypertension in SHRs. Sixteen-week-old rats in the SHR-Water and SHR-TMAO groups (12-wk TMAO treatment) showed similar blood pressures, angiopathy, and cardiac hypertrophy. However, the SHR-TMAO group had lower plasma NH2-terminal pro-B-type natriuretic peptide, LVEDP, and cardiac fibrosis. In contrast to age-matched WKY rats, 60-wk-old SHRs showed hypertensive angiopathy and heart failure with preserved ejection fraction. Compared with the SHR-Water group, the SHR-TMAO group (56-wk TMAO treatment) showed significantly lower plasma NH2-terminal pro-B-type natriuretic peptide and vasopressin, significantly lower LVEDP, and cardiac fibrosis. In conclusion, a four- to fivefold increase in plasma TMAO does not exert negative effects on the circulatory system. In contrast, increased dietary TMAO seems to reduce diastolic dysfunction in pressure-overloaded hearts in rats. NEW & NOTEWORTHY Chronic, low-dose trimethylamine oxide (TMAO) treatment that increases plasma TMAO by four- to fivefold reduces plasma NH2-terminal pro-B-type natriuretic peptide and vasopressin, left ventricular end-diastolic pressure, and cardiac fibrosis in pressure-overloaded hearts in hypertensive rats. Our study provides evidence that a moderate increase in plasma TMAO does not have a negative effect on the circulatory system. In contrast, increased dietary TMAO seems to reduce diastolic dysfunction in the pressure-overloaded heart.

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25

Gil, Bartosz, Zbigniew Rogala, and Paweł Dorosz. "Pool Boiling Heat Transfer Coefficient of Low-Pressure Glow Plasma Treated Water at Atmospheric and Reduced Pressure." Energies 13, no. 1 (December 21, 2019): 69. http://dx.doi.org/10.3390/en13010069.

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This paper investigates the influence of low-pressure glow plasma water treatment on boiling phenomenon. The presented results show the novel influence and potential new applications of low-pressure glow plasma treated water. Low-pressure glow plasma water treatment affects some of its physical properties such as surface tension, pH, and electric conductivity; this is due to changes in the water structure. An experimental analysis aimed to investigate the effect of such a treatment on the boiling heat transfer coefficient of water, and to assess the stability of GPTW. The experiments were carried out at atmospheric and reduced pressure for heat fluxes up to 70 kW/m2. The analysis shows significant deterioration of the boiling heat transfer coefficient under reduced pressure. In addition, the plasma treatment process had no significant effect on the thermal conductivity of water, as confirmed experimentally. A slight increase was observed, but it was within the measuring error range of the instruments used.

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26

Owen, Michael J. "Plasma/Corona Treatment of Silicones." Australian Journal of Chemistry 58, no. 6 (2005): 433. http://dx.doi.org/10.1071/ch04297.

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There is considerable current interest in plasma and corona treatment of silicones. It is well established that a thin, silica-like layer is created on the surface by such treatments. Much fresh insight has emerged concerning the role of low-molecular-weight materials in the hydrophobic recovery of treated elastomers. Even if these diffusible species are removed before treatment, hydrophobic recovery still occurs above a threshold energy implying that they are produced in situ by the treatment. A particularly significant new direction in the plasma treatment field is plasma polymerization of organosilicon monomers using atmospheric pressure glow discharge (APGD).

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27

Sevilla, Pablo, Carlos Lopez-Suarez, Jesús Pelaez, Celia Tobar, Veronica Rodriguez-Alonso, and María J. Suarez. "Influence of Low-Pressure Plasma on the Surface Properties of CAD-CAM Leucite-Reinforced Feldspar and Resin Matrix Ceramics." Applied Sciences 10, no. 24 (December 10, 2020): 8856. http://dx.doi.org/10.3390/app10248856.

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The introduction of new ceramic materials for dental restorations is currently a reality; however, little information is available on their surface treatment for the bonding process. Furthermore, surface treatment with plasma on ceramic materials has been recently introduced, although not many studies are available. The aim of this study was to evaluate the surface properties of a leucite-reinforced feldspar ceramic (LIC) and resin matrix ceramic (RMC) after low-pressure plasma treatment. From each material, 48 discs were prepared and subject to surface treatment. The LIC group was treated by hydrofluoric acid (HF) (LIC-HF), plasma with oxygen (LIC-O2), and plasma with argon (LIC-Ar). The RMC group was treated by sandblasting with alumina (RMC-SB), plasma with oxygen (RMC-O2), and plasma with argon (RMC-Ar). The groups whose surfaces were not subjected to treatment were considered as the control group. Surface wettability and roughness was analyzed. The results showed significant differences among the treatments for both ceramics regarding wettability and roughness. Plasma treatments increased the wettability and had a very low effect on the roughness. Plasma treatments achieved similar values for both surface properties in each ceramic group with no differences between both treatments. Plasma treatment seems to be a promising alternative for ceramic surface treatments since it increased the surface energy of the ceramics analyzed and hardly affects the roughness. Further studies are necessary to evaluate the effect of plasma treatment on the bond strength of ceramics.

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28

DEILMANN, MICHAEL, HELMUT HALFMANN, NIKITA BIBINOV, JOACHIM WUNDERLICH, and PETER AWAKOWICZ. "Low-Pressure Microwave Plasma Sterilization of Polyethylene Terephthalate Bottles." Journal of Food Protection 71, no. 10 (October 1, 2008): 2119–23. http://dx.doi.org/10.4315/0362-028x-71.10.2119.

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A low-pressure microwave plasma reactor was developed for sterilization of polyethylene terephthalate (PET) bottles. In contrast to the established method using aseptic filling machines based on toxic sterilants, here a microwave plasma is ignited inside a bottle by using a gas mixture of nitrogen, oxygen, and hydrogen. To that effect, a reactor setup was developed based on a Plasmaline antenna allowing for plasma ignition inside three-dimensional packages. A treatment time below 5 s is provided for a reduction of 105 and 104 CFU of Bacillus atrophaeus and Aspergillus niger, respectively, verified by means of a count reduction test. The sterilization results obtained by means of this challenge test are in accordance with requirements for aseptic packaging machines as defined by the U.S. Food and Drug Administration and the German Engineering Federation. The plasma sterilization process developed here for aseptic filling of beverages is a dry process that avoids residues and the use of maximum allowable concentrations of established sterilants, e.g., hydrogen peroxide.

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29

Plaksin, Vadim Yu, Heon Ju Lee, Chan Joo Yim, and Min Kook Ko. "Development of an Extended Arc Plasma Source for Low-Pressure Surface Treatment." Journal of the Korean Physical Society 53, no. 9(5) (November 15, 2008): 3077–82. http://dx.doi.org/10.3938/jkps.53.3077.

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30

Šourková, Hana, Gregor Primc, and Petr Špatenka. "Surface Functionalization of Polyethylene Granules by Treatment with Low-Pressure Air Plasma." Materials 11, no. 6 (May 25, 2018): 885. http://dx.doi.org/10.3390/ma11060885.

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31

Borodaev, I. A., V. S. Zheltukhin, A. S. Sizov, and E. V. Strebkov. "Simulation of low-pressure rf plasma treatment of ultrahigh molecular weight polyethylene." Journal of Physics: Conference Series 1328 (October 2019): 012007. http://dx.doi.org/10.1088/1742-6596/1328/1/012007.

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32

Sarapirom, S., and L. D. Yu. "Low-pressure and atmospheric plasma treatments of sunflower seeds." Surface and Coatings Technology 406 (January 2021): 126638. http://dx.doi.org/10.1016/j.surfcoat.2020.126638.

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33

Gorbunova, Natalia A. "LOW-TEMPERATURE ATMOSPHERIC-PRESSURE PLASMA IN MICROBIAL DECONTAMINATION AND MEAT TECHNOLOGY. A REVIEW." Theory and practice of meat processing 4, no. 1 (April 5, 2019): 21–29. http://dx.doi.org/10.21323/2414-438x-2019-4-1-21-29.

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The development of plasma technology is associated with the unique features of non-equilibrium low-temperature plasma: high electron energy and high concentration of chemically active excited and charged particles at low gas temperature, which allows to process thermolabile materials and biological objects in gentle conditions when high temperatures are not required. The biological effects of low-temperature plasma exposure are considered. It was established that during plasma treatment, a combined effect on cells and tissues of living systems from UV radiation, ions and chemically active particles occurs. Depending on the plasma type, the significance of each of the listed mechanisms for increasing the effectiveness of plasma treatment may vary. However, all these mechanisms interact with each other and have a synergistic effect. It was shown that the conducted studies confirm the ability of low-temperature plasma to inactivate pathogenic microorganisms upon contact with biological objects and foods. The results of the studies are presented, the purpose of which was to study the effect of plasma treatment on nitrite concentration in the water treated by this method and to assess the possibility of its use as a source of nitrite when curing meat products.

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34

Martinez, M. A., J. Abenojar, and N. Encinas. "Polyolefinic Surface Activation by Low and Atmospheric Pressure Plasma Treatments." Materials Science Forum 805 (September 2014): 149–54. http://dx.doi.org/10.4028/www.scientific.net/msf.805.149.

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Polyolefins are increasingly used in the construction of lightweight structures. Due to their low surface energy, it is difficult to have a proper bond with adhesives and paints. By using cold plasma treatments, these surfaces can be activated through the formation of highly reactive functional groups that can promote high strength adhesive bonds. This paper compares the results of cold plasma treatments using two techniques (low pressure and atmospheric plasma torch) applied on polypropylene and high density polyethylene. The obtained data allow the demonstration of a higher effectiveness of atmospheric plasma, with a significant increase in surface energy in both materials.

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35

Parveen, Shama, Sohel Rana, and Parikshit Goswami. "Developing Super-Hydrophobic and Abrasion-Resistant Wool Fabrics Using Low-Pressure Hexafluoroethane Plasma Treatment." Materials 14, no. 12 (June 11, 2021): 3228. http://dx.doi.org/10.3390/ma14123228.

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The growing interest in wool fibres as an eco-friendly and sustainable material for diverse industrial applications requires an enhancement of their functional performance. To address this, wool fabrics were treated in the present research with low-pressure hexafluoroethane (C2F6) plasma to impart superhydrophobicity and improve their abrasion resistance. Unscoured and scoured wool fabrics were treated with C2F6 while varying plasma power (80 W and 150 W), gas flow rate (12 sccm and 50 sccm) and treatment time (6 min and 20 min), and the effect of plasma parameters on the abrasion resistance, water contact angle and dyeing behaviour of the wool fabrics was studied. Martindale abrasion testing showed that the surface abrasion of the wool fabrics increased with the number of abrasion cycles, and the samples treated with 150 W, 20 min, 12 sccm showed superior abrasion resistance. The scoured wool fabrics showed a contact angle of ~124°, which was stable for only 4 min 40 s, whereas the plasma-treated samples showed a stable contact angle of over 150°, exhibiting a stable superhydrophobic behaviour. The C2F6 plasma treatment also significantly reduced the exhaustion of an acid dye by wool fabrics. The EDX study confirmed the deposition of fluorine-containing elements on the wool fabrics significantly altering their properties.

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36

ITOH, Yoshiyasu, Masahiro SAITOH, Keizo HONDA, and Matuo MIYAZAKI. "Effect of Transferred Arc Treatment on Substrate Surface for Low Pressure Plasma Spraying." Journal of the Society of Materials Science, Japan 42, no. 478 (1993): 874–80. http://dx.doi.org/10.2472/jsms.42.874.

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37

Spyrou, Nicolas, and Jayr de Amorim. "Atmospheric Pressure DBD Low-Temperature Plasma Reactor for the Treatment of Sugarcane Bagasse." IEEE Transactions on Plasma Science 47, no. 3 (March 2019): 1583–92. http://dx.doi.org/10.1109/tps.2019.2897075.

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38

Wang, Hua Qing, and Mei Yang. "Treatment of Wool Fabrics by Argon Atmospheric Pressure Low Temperature Plasma and its Dyeing." Advanced Materials Research 441 (January 2012): 49–53. http://dx.doi.org/10.4028/www.scientific.net/amr.441.49.

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With the increase in the environmental protection consciousness of people, attention has focused on plasma technology because of its efficiency and environmentally friendliness. In order to improve the dyeing behavior of wool fabrics, surface modification of wool fabrics was carried out using an atmospheric pressure (argon) low temperature plasma treatment (LTP). Morphology and chemical composition analyses of the treated wool fiber surface were carried out by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The effect on the surface properties of wool fabrics treated for different times was evaluated. The results showed that the coloration of wool fabric is improved with an argon atmospheric pressure low temperature plasma (LTP) treatment but the fabric has a lower color fastness to washing and rubbing. This results from the formation of sulfonic groups and the increase in nitrogen content attributed to more severe etching and oxidization on the surface of wool fibers.

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39

Guo, Xiurong, Khanh Hop Ha, and Danfeng Du. "Atmospheric Pressure Plasma for Diesel Particulate Matter Treatment: A Review." Catalysts 11, no. 1 (December 29, 2020): 29. http://dx.doi.org/10.3390/catal11010029.

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The purification of diesel exhaust gas is of great importance to prevent the atmospheric emission of major pollutants such as diesel particulate matter and nitrogen oxides and meet the environmental regulations. The atmospheric-pressure plasma is attracting increasing interest and is a promising after-treatment technology for purifying diesel emission at low temperatures. However, when compared with the numerous publications on nitrogen oxides reduction by non-thermal plasma, using non-thermal plasma to particulate matter treatment have relatively limited. This work provides a comprehensive review of the plasma applications for diesel particulate matter treatment, including self-regenerating diesel particulate filter, diesel particulate matter removal, and simultaneous removal of diesel particulate matter and nitrogen oxides. The treatment of particulate matter from both simulated particulate matter sources and actual diesel engines also discussed in this comprehensive review. The challenge to this technology is limited energy consumption for plasma, which should be less than 5% (~30 J/L) of the overall fuel consumption. Until now, the atmospheric-pressure plasma has been no commercial implementation in diesel exhaust gas treatment, so more research is needed to be done in this field.

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Moskalenko, N. Yu, O. A. Kudryashova, L. S. Kudryashov, S. L. Tikhonov, N. V. Tikhonova, and V. V. Pestov. "Assessment of quality and safety of pork treated with low-temperature atmospheric-pressure plasma." Theory and practice of meat processing 6, no. 1 (April 28, 2021): 78–86. http://dx.doi.org/10.21323/2414-438x-2021-6-1-78-86.

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It is known that processing methods ensuring partial or full microbial inactivation are quite limited. Therefore, it is of great interest to develop technique and technologies allowing the effective action on microorganisms without a significant influence on product properties. The use of cold plasma can be one of the promising methods of meat product treatment by cold sterilization. The present work examines a possibility of chilled meat treatment with low-temperature atmospheric-pressure plasma to increase its stability to microbial spoilage and extend shelf life. To obtain low temperature plasma, the equipment developed by the designing department “Plasmamed” was used. Chilled meat was treated with low-temperature atmospheric-pressure argon plasma for 5, 10, 20 and 30 min. Samples were stored at a temperature of 2–4 °C for 10 days. Organoleptic indices, moisture weight fraction, changes in pH and water activity were analyzed before treatment and during storage. Sanitary microbiological analyses were carried out by the following indicators: quantity of mesophilic aerobic and facultative anaerobic microorganisms (QMAFAnM), the presence and quantity of coliforms, Salmonella, Escherichia coli, Listeria monocytogenes, Proteus. It was shown that meat cold treatment with argon plasma inhibited the development of mesophilic microorganisms. The colony forming units detected in the samples after ten days of storage were determined by the duration of exposure to plasma. It was proved that meat treatment for 15 and 30 min had the bactericidal effect and facilitated an improvement in meat color during storage. The organoleptic indices of the samples treated with plasma corresponded to the requirements of standards and approved consumer characteristics.

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Hoppanová, Lucia, Veronika Medvecká, Juliana Dylíková, Daniela Hudecová, Barbora Kaliňáková, Svetlana Kryštofová, and Anna Zahoranová. "Low-temperature plasma applications in chemical fungicide treatment reduction." Acta Chimica Slovaca 13, no. 1 (April 1, 2020): 26–33. http://dx.doi.org/10.2478/acs-2020-0005.

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AbstractIn order to reduce the environmental burden of chemicals, various new alternatives to seed protection are being sought. Our aim was to find an environmentally acceptable solution leading to the inactivation of seed-borne phytopathogenic fungi Fusarium culmorum on the surface of wheat and barley seeds with a positive effect on their germination. As a low-temperature plasma (LTP) source, a Diffuse Coplanar Surface Barrier Discharge (DCSBD) was used. Plasma generated by DCSBD is non-equilibrium, cold, diffuse, macroscopically homogeneous even in ambient air at atmospheric pressure. Experimental results showed that LTP treatment in the range of 120—300 s significantly inhibits the growth of F. culmorum on the surface of the seeds. The efficiency of LTP treatment was compared with traditional seed protection processes using chemical fungicide and also with combined seed pretreatment by plasma and subsequent application of chemical fungicide. No growth of F. culmorum was observed after the combination of Vitavax 2000 fungicide application in the dose of 10 % and 60 s of LTP treatment even on the 5th day of incubation. Better wettability of seeds with the chemical fungicide was related to the change on seed surface, which becomes hydrophilic after 10 s of LTP application. Short LTP exposure times did not affect germination and improved the growth parameter of cereal seeds. By combining physical (LTP) and chemical (Vitavax 2000) treatments of cereal seeds, it is possible to effectively reduce the required amount of chemical fungicide and to stimulate germination and early growth seed parameters.

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Bartali, Ruben, Leandro Lorenzelli, Marina Scarpa, Elisa Morganti, Cristian Collini, Victor Micheli, Gloria Gottardi, et al. "Super-Hydrophilic PDMS and PET Surfaces for Microfluidic Devices." Advances in Science and Technology 81 (September 2012): 96–100. http://dx.doi.org/10.4028/www.scientific.net/ast.81.96.

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In this work the effect of air plasmas on wettability of Polydimethylsiloxane (PDMS) and polyethylene terephthalate (PET) was studied. These polymers are widely used materials in the fabrication of microfluidic devices. The microfluidic system fabricated from native PET and PDMS requires active pumping mechanism, due to a low hydrophilic surface behavior. To render hydrophilic and increase the capillary flow into the device, plasma treatments can be used. Air plasma treatment is an interesting technology for microfluidic fields due to simplicity of use and low cost. This study describes the effect of the working plasma pressure on wettability of polymers. The polymers were treated by RF plasma and the wettability was studied by means of sessile contact angle. The results established that the air plasma can increase the wettability of both polymers. Moreover we demonstrated that by optimizing the working pressure a superhydrophilic surface (with a contact angle less than 5°) can be obtained. The findings suggest that air plasma treatments are a suitable technology to enhance polymers surface wetting performance for microfluidic devices.

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Koban, Ina, Rutger Matthes, Nils-Olaf Hübner, Alexander Welk, Peter Meisel, Birte Holtfreter, Rabea Sietmann, et al. "Treatment ofCandida albicansbiofilms with low-temperature plasma induced by dielectric barrier discharge and atmospheric pressure plasma jet." New Journal of Physics 12, no. 7 (July 27, 2010): 073039. http://dx.doi.org/10.1088/1367-2630/12/7/073039.

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Yalcinkaya, Fatma, Baturalp Yalcinkaya, Adam Pazourek, Jana Mullerova, Martin Stuchlik, and Jiri Maryska. "Surface Modification of Electrospun PVDF/PAN Nanofibrous Layers by Low Vacuum Plasma Treatment." International Journal of Polymer Science 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/4671658.

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Nanofibres are very promising for water remediation due to their high porosity and small pore size. Mechanical properties of nanofibres restrict the application of pressure needed water treatments. Various PAN, PVDF, and PVDF/PAN nanofibre layers were produced, and mechanical properties were improved via a lamination process. Low vacuum plasma treatment was applied for the surface modification of nanofibres. Atmospheric air was used to improve hydrophilicity while sulphur hexafluoride gas was used to improve hydrophobicity of membranes. Hydrophilic membranes showed higher affinity to attach plasma particles compared to hydrophobic membranes.

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CHINGSUNGNOEN, ARTIT, SUJIRA MANEERAT, PORAMATE CHUNPENG, PHITSANU POOLCHARUANSIN, and RACHANEE NAM-MATRA. "Antimicrobial Treatment of Escherichia coli and Staphylococcus aureus in Herbal Tea Using Low-Temperature Plasma." Journal of Food Protection 81, no. 9 (August 15, 2018): 1503–7. http://dx.doi.org/10.4315/0362-028x.jfp-18-062.

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ABSTRACT A low-pressure capacitively coupled discharge was used to study antimicrobial treatment in herbal tea. Ambient air with a relative humidity of 40% was used as a precursor gas and fed into the chamber via a perforated power electrode. An electrical discharge plasma was produced at a radio frequency of 10 kHz and power of 80 W. The operating pressure during treatment was kept constant at 260 Pa. The target microorganisms, Escherichia coli and Staphylococcus aureus, isolated from the herbal tea were inoculated on nutrient agar petri dishes and exposed to the plasma for 0.5, 1.0, 1.5, and 2.0 min. All treatments were carried out in triplicate for different exposure times to calculate the D-value by the enumeration method. D-values of 0.73 and 0.67 min were obtained corresponding to E. coli and S. aureus reduction, respectively.

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Tyczkowski, Jacek, Hanna Kierzkowska-Pawlak, Jan Sielski, and Iwona Krawczyk-Kłys. "Low-Temperature Plasma Modification of Styrene–Butadiene Block Copolymer Surfaces for Improved Adhesion—A Kinetic Approach." Polymers 12, no. 4 (April 17, 2020): 935. http://dx.doi.org/10.3390/polym12040935.

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This paper proposed a kinetic model that can describe the changes in the adhesion properties of styrene–butadiene (SBS) block copolymer surfaces under the influence of low-temperature plasma treatment. As a measure of these changes, the peel strength of joints formed between the copolymer surface and the polyurethane adhesive was chosen. Five types of low-temperature low-pressure RF plasma, two inert plasmas (Ar and He), and three reactive plasmas (O2, CO2, and CCl4) were tested. It was found that for all these types of plasma, the peel strength with the plasma treatment time first increases rapidly reaching a maximum value, and then there is a visible decrease in peel strength, after which the peel strength increases again. This dependence of the peel strength on the plasma treatment time is very well described by the proposed model, which considers three processes: (1) the generation of radical states followed by the creation of functional groups involved in the adhesive bonding process, (2) the surface cross-linking that decreases the concentration of these functional groups, and (3) the formation of nano-roughness. The model analysis revealed differences between the action of reactive and inert plasmas in the SBS surface cross-linking mechanism and preferential etching process, as well as differences in the generation of radical states between the O2 plasma (electron process) and other plasmas tested (ionic processes).

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Zhang, Ying Chen, Feng Jun Shi, Jian Xin He, Hong Yan Wu, and Yi Ping Qiu. "Surface Characterization of Oxygen Plasma Treated Nano-SiO₂ Sol-Gel Coating UHMWPE Filaments." Materials Science Forum 658 (July 2010): 117–20. http://dx.doi.org/10.4028/www.scientific.net/msf.658.117.

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UHMWPE filaments have a low surface free energy and therefore often require a modification of their surface properties before any use. Atmospheric pressure plasmas treatment is a convenient and environmentally friendly way to obtain these modifications by introducing new chemical groups at the surface without affecting the bulk properties. This paper studies the influence of nano-SiO2 sol-gel coating pretreatment on atmospheric pressure plasma jet (APPJ) treatment of ultrahigh molecular weight polyethylene (UHMWPE) fibers when a mixture of 100% helium and 1% oxygen used as the treatment gas. The surface properties of the plasma-treated UHMWPE filaments are characterized using contact angle measurements and ATR-FTIR spectroscopy. The UHMWPE filaments show a remarkable increase in surface free energy after plasma treatment. ATR-FTIR spectroscopy of the plasma-treated UHMWPE filaments reveals that plasma treatment introduces oxygen-containing functionalities on the UHMWPE filaments surface leading to the increased surface free energy.

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Gómez-Méndez, Luis D., Luis C. Jiménez-Borrego, Alejandro Pérez-Flórez, Raúl A. Poutou-Piñales, Aura M. Pedroza-Rodríguez, Juan C. Salcedo-Reyes, Andrés Vargas, and Johan M. Bogoya. "LDPE Transformation by Exposure to Sequential Low-Pressure Plasma and TiO2/UV Photocatalysis." Molecules 26, no. 9 (April 26, 2021): 2513. http://dx.doi.org/10.3390/molecules26092513.

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Low-density polyethylene (LDPE) sheets (3.0 ± 0.1 cm) received sequential treatment, first by the action of direct-current low-pressure plasma (DC-LPP) with a 100% oxygen partial pressure, 3.0 × 10−2 mbar pressure, 600 V DC tension, 5.6 cm distance, 6-min treatment. Then, sheets were submitted to TiO2 photocatalysis at UV radiation at 254 nm (TiO2/UV) with a pH value of 4.5 ± 0.2 and a TiO2 concentration of 1 gL−1. We achieved a complementary effect on the transformation of LDPE films. With the first treatment, ablation was generated, which increased hydrophilicity. With the second treatment, the cavities appeared. The changes in the LDPE sheets’ hydrophobicity were measured using the static contact angle (SCA) technique. The photocatalytic degradation curve at 400 h revealed that the DC-LPP photocatalysis sequential process decreased SCA by 82°. This was achieved by the incorporation of polar groups, which increased hydrophilicity, roughness, and rigidity by 12 and 38%, respectively. These sequential processes could be employed for LDPE and other material biodegradation pretreatment.

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Mutel, B., O. Dessaux, P. Goudmand, J. Grimblot, A. Carpentier, and S. Szarzynski. "Treatment of polymer surfaces by low pressure microwave plasmas." Revue de Physique Appliquée 23, no. 7 (1988): 1253–55. http://dx.doi.org/10.1051/rphysap:019880023070125300.

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Lee, Hyun-Young, Jung-Woo Ok, Ho-Jun Lee, Gyoo Cheon Kim, and Hae June Lee. "Surface Treatment of a Titanium Implant using a low Temperature Atmospheric Pressure Plasma Jet." Applied Science and Convergence Technology 25, no. 3 (May 30, 2016): 51–55. http://dx.doi.org/10.5757/asct.2016.25.3.51.

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