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Polyethylene terephthalate (PET) surface modification by VUV and neutral active species in remote oxygen or hydrogen plasmas
Author(s) -
Zhang Yan,
Ishikawa Kenji,
Mozetič Miran,
Tsutsumi Takayoshi,
Kondo Hiroki,
Sekine Makoto,
Hori Masaru
Publication year - 2019
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.201800175
Subject(s) - polyethylene terephthalate , oxygen , hydrogen , plasma , contact angle , materials science , polyethylene , analytical chemistry (journal) , photon , photochemistry , chemistry , optics , composite material , organic chemistry , physics , quantum mechanics
Polyethylene terephthalate (PET) are exposed either by VUV photons emitted from oxygen or hydrogen plasmas or by VUV photons and neutral active species from both plasmas. The water contact angle (WCA) of PET surface increased after treatment with H 2 VUV + H atoms, due to the cleavage of the oxygen‐containing groups by VUV photons. The WCA decreased for the case of treatment with O 2 VUV + O‐related neutral active species, leading to be released the polar groups like −COH or −COOH from the PET surface with a depth of less than about 10 nm. Oxygen‐related neutrals etched the PET film and generated a rough surface which also contributed to the decrease in WCA however no bulk chemical structure obviously changed.