Plasma processes at atmospheric and low pressures

Bárdoš, Ladislav; Baránková, Hana

doi:10.1016/j.vacuum.2008.04.063

Cited by 75 publications

(50 citation statements)

References 40 publications

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“…Utilization of non-thermal plasma discharges at pressures of or near 1 atm under ambient conditions, atmospheric pressure plasma (APP), makes the decontamination process practical and inexpensive (Yun et al, 2010). Hence, the APP system has overcome previous disadvantages of low-pressure plasma and has been used as a surface modification tool in engineering, environmental, and biomedical fields, as well as food applications (Bardos et al, 2009;Lee et al, 2012a).…”

Section: Introductionmentioning

confidence: 99%

Effect of Inactivating Salmonella Typhimurium in Raw Chicken Breast and Pork Loin Using an Atmospheric Pressure Plasma Jet

Kim¹,

Yong²,

Park³

et al. 2013

Journal of Animal Science and Technology

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The optimal conditions for applications of an atmospheric pressure plasma (APP) jet for the inactivation of Salmonella Typhimurium in chicken breast and pork loins were investigated. APP jet treatment for 10 min (versus 5 minutes) showed a higher inactivation of S. Typhimurium in an agar plate, with the best effect at a distance of 20 mm. A treatment on both sides (both-side treatment) for 2.5 + 2.5 min showed a greater inhibition on S. Typhimurium growth compared to single-side treatment for 5 min, with reduction levels of 0.66 log CFU/g in chicken breast and 1.33 log CFU/g in pork loin, respectively. However, there was no significant difference between single-side treatment for 10 min and both-side treatment for 5 + 5 min in chicken breasts and pork loin samples. In conclusion, APP jet treatment conditions, including distance, time, and direction, may affect the inactivation efficiency of S. Typhimurium. In this experiment, distance of 20 mm and both-side treatment were the best conditions. Therefore, the optimal APP jet treatment conditions were evaluated to maximize its practical efficiency.

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Section: Introductionmentioning

confidence: 99%

Effect of Inactivating Salmonella Typhimurium in Raw Chicken Breast and Pork Loin Using an Atmospheric Pressure Plasma Jet

Kim¹,

Yong²,

Park³

et al. 2013

Journal of Animal Science and Technology

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“…Recently, there has been an intense development in cold plasma surface processing systems at atmospheric pressure, which overcome the disadvantages of vacuum environment and the associated high cost [11][12][13][14]. Atmospheric pressure plasmas with various gases and gas mixtures can produce a number of high-density active species such as electrons, free radicals, ions, and photons [15,16].…”

Section: Introductionmentioning

confidence: 99%

Surface modification of PET films by atmospheric pressure plasma exposure with three reactive gas sources

et al. 2012

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The surface modification of poly (ethylene terephthalate) (PET) film was carried out using an atmospheric pressure plasma (APP) jet device with three reactive gases: air, N 2 , and Ar. The water contact angles on the PET film were found to decrease considerably after the APP exposure. The changes in the advancing and receding contact angles of water on the APP-exposed PET film with aging time were examined by the wetting force measurements employing the Wilhelmy method. The hydrophobic recovery due to the rinsing with water as well as the aging in air was observed only for the advancing angle, which was probably caused by the dissolution of low molecular weight oxidized materials into water, the loss of volatile oxidized species to the atmosphere and the reorientation and the migration of polymer chains. The wettability and the surface free energy of the APP-exposed PET film after diminishing hydrophobic recovery was sufficiently large compared with the untreated film. X-ray photoelectron spectroscopy confirmed that the PET film surface was oxidized due to the APP exposure. When N 2 gas was used for the APP exposure, the surface nitrogen concentration was found to increase with decreasing D. The surface oxygen concentration on the APP-exposed PET film was reduced by rinsing with water, in accordance with the hydrophobic recovery behavior. From atomic force microscopy, surface topographical change due to the APP exposure was observed. The changes in the PET surface properties due to the APP exposure as mentioned above were remarkable for using N 2 gas.

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“…As a consequence, after the gas breakdown takes place, the charge accumulation on the dielectric surface prevents the corona-to-arc transition. The DBD plasmas have many applications ranging from surface functionalization and grafting [2], improvement of adhesion and hydrophylicity [3], sterilization [4], processing of textile and fabrics [5] and, most recently, the so-called plasma medicine [6]. …”

mentioning

confidence: 99%

Modification of polyethylene terephthalate by atmospheric pressure dielectric barrier discharge (DBD) in view of improving the polymer wetting properties

Kostov

Santos

Nascente

et al. 2012

J. Phys.: Conf. Ser.

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Abstract. Surface treatment of polymers by discharge plasmas has increasingly found industrial applications due to its capability of modifying uniformly the surface without changing the material bulk properties. This work deals with surface modification of polyethylene terephthalate (PET) by a dielectric barrier discharge (DBD) at atmospheric pressure. The treatments were conducted in air, nitrogen or argon plasma. The polymer surface was characterized by contact angle measurement, X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The results show that the plasma treatment introduces oxygen-and nitrogen-related polar groups on the polymer surface and promotes the surface roughening. Both plasma-induced surface modifications contribute to the enhancement of the polymer wettability. IntroductionPolymers possess good mechanical and chemical properties; however, their use in various applications involving composite and biomaterials, packing, printing, dying etc, has been restricted due to their poor adhesion properties. Improvement of the adhesion can be accomplished by chemical methods (adding functional groups on the surface) and/or trough introducing micro-or nano-scale roughness on the surfaces. Recently, the classical chemical technologies have been gradually replaced by the environmentally friendly, versatile and low-cost plasma treatment. The atmospheric pressure plasmas are especially attractive as surface modification tools due to their applicability to a variety of substrates, easy scaling-up, quick processing time, and low cost [1].This work describes the surface modification of a PET polymer by atmospheric pressure dielectric barrier discharge DBD. This type of discharge occurs between two planar or cylindrical electrodes provided that at least one of them is covered by a dielectric layer. As a consequence, after the gas breakdown takes place, the charge accumulation on the dielectric surface prevents the corona-to-arc transition. The DBD plasmas have many applications ranging from surface functionalization and grafting [2], improvement of adhesion and hydrophylicity [3], sterilization [4], processing of textile and fabrics [5] and, most recently, the so-called plasma medicine [6].

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Plasma processes at atmospheric and low pressures

Cited by 75 publications

References 40 publications

Effect of Inactivating Salmonella Typhimurium in Raw Chicken Breast and Pork Loin Using an Atmospheric Pressure Plasma Jet

Effect of Inactivating Salmonella Typhimurium in Raw Chicken Breast and Pork Loin Using an Atmospheric Pressure Plasma Jet

Surface modification of PET films by atmospheric pressure plasma exposure with three reactive gas sources

Modification of polyethylene terephthalate by atmospheric pressure dielectric barrier discharge (DBD) in view of improving the polymer wetting properties

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