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ID 114084
Author
Yoshitani, Yuki Tokushima University
Mitani, Kimiaki Tokushima University
Niibe, Masahito University of Hyogo
Nakano, Yoshitaka Chubu University
Mukai, Takashi Nichia Corporation
Keywords
Air plasma jet
Polypropylene film
Oxygen radical ions
Heat-induced oxidation
Oxygen radicals
Ultraviolet-induced oxidation
Content Type
Journal Article
Description
Polypropylene (PP) film surfaces were treated using air-based nonequilibrium atmospheric pressure plasma jets generated with a twisted wires-cylindrical electrode configuration. For comparison, PP samples were also processed with Ar plasma jets. The flux of charged particles imparted to the polymer surface by the air plasma jet greatly increased with decreases in both the gas flow rate and nozzle-to-sample distance, which was not the case for the Ar plasma jet. Reducing the gas flow rate and the nozzle-to-sample distance greatly enhanced the extent to which the surface was rendered hydrophilic by the air plasma within a short treatment time of 1 min. This enhanced effect is believed to originate from a high concentration of oxygen-based functional polar groups (FPGs) containing C−O/C−OH and C=O/C=O−OH bonds grafted onto the surface. The hydrophilic surfaces resulting from this process also exhibited nanopore structures. The large number of oxygen-based FPGs produced by the air plasma can be attributed primarily to oxygen radical ions impinging from the air plasma on the surface. This can further be attributed secondarily to heat-induced oxidation rather than the sticking of oxygen radicals and UV-induced oxidation from the plasma. The nanoporous structure can also be ascribed to oxidation from UV photogenerated holes.
Journal Title
Applied Surface Science
ISSN
01694332
NCID
AA1152169X
Publisher
Elsevier
Volume
509
Start Page
144910
Published Date
2019-12-04
Remark
論文本文は2021-12-04以降公開予定
Rights
© 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
DOI (Published Version)
URL ( Publisher's Version )
language
eng
TextVersion
その他
departments
Science and Technology
Technical Support Department