Surface Functionalization of Polyethylene Granules by Treatment with Low-Pressure Air Plasma

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dc.contributor.authorŠourková, Hana
dc.contributor.authorPrimc, Gregor
dc.contributor.authorŠpatenka, Petr
dc.date.accessioned2019-07-25T08:50:04Z
dc.date.available2019-07-25T08:50:04Z
dc.date.issued2019-05-25
dc.description.abstractPolyethylene granules of diameter 2 mm were treated with a low-pressure weakly ionized air plasma created in a metallic chamber by a pulsed microwave discharge of pulse duration 180 µs and duty cycle 70%. Optical emission spectroscopy showed rich bands of neutral nitrogen molecules and weak O-atom transitions, but the emission from N atoms was below the detection limit. The density of O atoms in the plasma above the samples was measured with a cobalt catalytic probe and exhibited a broad peak at the pressure of 80 Pa, where it was about 2.3 × 1021 m−3 . The samples were characterized by X-ray photoelectron spectroscopy. Survey spectra showed oxygen on the surface, while the nitrogen concentration remained below the detection limit for all conditions. The high-resolution C1s peaks revealed formation of various functional groups rather independently from treatment parameters. The results were explained by extensive dissociation of oxygen molecules in the gaseous plasma and negligible flux of N atoms on the polymer surface.cs
dc.format.extent13 strancs
dc.identifier.doi10.3390/ma11060885
dc.identifier.urihttps://dspace.tul.cz/handle/15240/152963
dc.identifier.urihttps://www.mdpi.com/1996-1944/11/6/885
dc.language.isocscs
dc.publisherMDPI
dc.relation.ispartofMaterials
dc.subjectpolyethylene granulescs
dc.subjectlow-pressure MW air plasmacs
dc.subjectoptical emission spectroscopycs
dc.subjectXPScs
dc.subjectlaser cobalt catalytic probecs
dc.titleSurface Functionalization of Polyethylene Granules by Treatment with Low-Pressure Air Plasmacs
local.relation.issue6
local.relation.volume11
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