Characterization of gas barrier silica coatings prepared from perhydropolysilazane films by vacuum ultraviolet irradiation

Yuta Kobayashi, Hirotaka Yokota, Yasushi Fuchita, Atsushi Takahashi, Yoshiyuki Sugahara

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    Gas barrier silica coatings were prepared from perhydropolysilazane (PHPS) by vacuum ultraviolet (VUV) irradiation under several irradiation conditions to investigate the relationship between their water vapor transmission rate (WVTR) and the irradiation conditions. PET substrates were coated with PHPS using its xylene solution, and the coatings were irradiated with VUV light (172 nm). The oxygen concentrations and irradiation distances were varied. The sample irradiated under conditions of lower oxygen concentration (less than 5%) and shorter irradiation distance (2.6mm) showed the lowest WVTR (0.721 g m 2 d-1). The sample irradiated under conditions of higher oxygen concentration (19%) and longer irradiation distance (13.4 mm), on the other hand, showed the highest WVTR (2.738g m2 d-1). These results suggest that VUV irradiation improves the gas barrier properties by Si-N bond cleavage rather than by oxidative reactions caused by O(1D) and O3.

    Original languageEnglish
    Pages (from-to)215-218
    Number of pages4
    JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
    Volume121
    Issue number1410
    Publication statusPublished - 2013 Feb

    Fingerprint

    Silicon Dioxide
    Gases
    Silica
    Irradiation
    Vacuum
    silicon dioxide
    coatings
    Coatings
    vacuum
    irradiation
    gases
    Steam
    Water vapor
    water vapor
    Oxygen
    oxygen
    Xylenes
    xylene
    Xylene
    perhydropolysilazane

    Keywords

    • Gas barrier properties
    • Perhydropolysilazane
    • Silica coating
    • Vacuum ultraviolet light
    • Water vapor transmission rate

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Materials Chemistry
    • Chemistry(all)
    • Condensed Matter Physics

    Cite this

    Characterization of gas barrier silica coatings prepared from perhydropolysilazane films by vacuum ultraviolet irradiation. / Kobayashi, Yuta; Yokota, Hirotaka; Fuchita, Yasushi; Takahashi, Atsushi; Sugahara, Yoshiyuki.

    In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, Vol. 121, No. 1410, 02.2013, p. 215-218.

    Research output: Contribution to journalArticle

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    abstract = "Gas barrier silica coatings were prepared from perhydropolysilazane (PHPS) by vacuum ultraviolet (VUV) irradiation under several irradiation conditions to investigate the relationship between their water vapor transmission rate (WVTR) and the irradiation conditions. PET substrates were coated with PHPS using its xylene solution, and the coatings were irradiated with VUV light (172 nm). The oxygen concentrations and irradiation distances were varied. The sample irradiated under conditions of lower oxygen concentration (less than 5{\%}) and shorter irradiation distance (2.6mm) showed the lowest WVTR (0.721 g m 2 d-1). The sample irradiated under conditions of higher oxygen concentration (19{\%}) and longer irradiation distance (13.4 mm), on the other hand, showed the highest WVTR (2.738g m2 d-1). These results suggest that VUV irradiation improves the gas barrier properties by Si-N bond cleavage rather than by oxidative reactions caused by O(1D) and O3.",
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    AU - Yokota, Hirotaka

    AU - Fuchita, Yasushi

    AU - Takahashi, Atsushi

    AU - Sugahara, Yoshiyuki

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