Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 448, Issue -, Pages 175-179Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2015.02.025
Keywords
Cold plasma; Polymer surface; Ion trapping; Characteristic time of ion trapping; Kinetics of charging; Wettability
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Physical mechanisms of the interaction of cold plasmas with organic surfaces are discussed. Trapping of plasma ions by the CH2 groups of polymer surfaces resulting in their electrical charging is treated. Polyethylene surfaces were exposed to the cold radiofrequency air plasma for different intervals of time. The change in the wettability of these surfaces was registered. The experimentally established characteristic time scales of the interaction of cold plasma with polymer surfaces are inversely proportional to the concentration of ions. The phenomenological kinetic model of the electrical charging of polymer surfaces by plasmas is introduced and analyzed. (C) 2015 Elsevier Inc. All rights reserved.
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