Journal of Materials Life Society
Online ISSN : 2185-7016
Print ISSN : 1346-0633
ISSN-L : 1346-0633
Volume 23 , Issue 3
Showing 1-6 articles out of 6 articles from the selected issue
Comprehensive Paper
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Original Papers
  • Xiaomeng FEI, Yuki KONDO, Tamio MORI, Katsuhiko HOSOI, Shin-ichi KUROD ...
    2011 Volume 23 Issue 3 Pages 113-119
    Published: October 31, 2011
    Released: May 08, 2021
    JOURNALS FREE ACCESS

    In this paper, active species in a cold atmospheric pressure RF capacitive Ar plasma jet were characterized using optical emission spectrometry (OES). OES revealed that excited Ar atoms (4p-4s transitions) were predominant in the plasma jet, and no ions were detected in the plasma afterglow even after the addition of N2 or O2. It was expected that this Ar plasma jet was quite suitable for polymer surface treatment with no serious surface decomposition. As an application to the Ar plasma jet, high-density polyethylene (HDPE) surface was treated with Ar, Ar/O2 and Ar/N2 plasmas, respectively. Influences of additive gas on the improvement of the hydrophilicity of polymer surface were investigated in details. It was found that an enhancement of the hydrophilicity of HDPE surface was observed when N2 or O2 as an additive gas was added into the Ar plasma.

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  • Xiaomeng FEI, Yuki KONDO, Tamio MORI, Katsuhiko HOSOI, Shin-ichi KUROD ...
    2011 Volume 23 Issue 3 Pages 120-127
    Published: October 31, 2011
    Released: May 08, 2021
    JOURNALS FREE ACCESS

    In this study, a high-density polyethylene (HDPE, 5-mm-thick, 0.95g/cm3) surface was treated using two types of cold atmospheric pressure Ar plasma jets (CAPPLAT plasma and APC plasma). In particular, the effects of the additive gas (N2 or O2) on the HDPE surface treatment were investigated and compared in details. Using the two Ar plasma jets, a large number of O-containing functional groups were introduced onto HDPE surface during the plasma treatment. However, the effects of the additive gas on the HDPE surface treatment are quite different from each other. In case of CAPPLAT plasma treatment, the water contact angle (WCA) value of treated HDPE surface increased slightly when trace of the additive gas was added into CAPPLAT plasma. However, in case of APC plasma treatment, the WCA value of treated HDPE surface decreased significantly when the same amount of the additive gas was added.

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