金属-非金属複合電気めっき膜の金属基板界面における組成勾配 Compositional Gradient at the Interface of Metal-Nonmetal Composite Electroplating Films on Metal Substrates

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Ultrahydrophobic composite films containing nickel and tetrafluoroethylene oligomers (TFEO) were formed on nickel plates by a composite electroplating method. The H<SUB>2</SUB>O contact angle increased with increasing electrical charge passed (Q), reaching a plateau of 142±2°once Q exceeded 2.4 C cm<SUP>-2</SUP>. From weight measurements and diffuse reflectance infrared spectra of films of varying thickness (d), the ratio of the surface amount of TFEO to that of nickel is revealed to increase gradually with increasing Q, when d<1.4 μm. The compositional gradient at the interface can be explained by the large difference between TFEO particles and Ni<SUP>2+</SUP> ions regarding the time each species attains a constant electrophoretic velocity. The time-lag mechanism further predicts that there is generally present such a compositional gradient at the interface between metal-nonmetal composite electro-plating films and substrates. Electron probe microanalysis and Auger electron spectroscopy indicated that the surface consists of a TFEO protrusive area (-60%) and a nickel-rich hollow area (-40%). The ultrahydrophobic character of the composite film is discussed on the basis of a two component heterogeneous surface model in which the incorporation of air into the Ni-rich hollow region is taken into account.

収録刊行物

  • 色材協會誌

    色材協會誌 71(3), 170-175, 1998-03-20

    一般社団法人 色材協会

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各種コード

  • NII論文ID(NAID)
    10003730921
  • NII書誌ID(NCID)
    AN00354634
  • 本文言語コード
    ENG
  • 資料種別
    NOT
  • ISSN
    0010180X
  • NDL 記事登録ID
    4437076
  • NDL 雑誌分類
    ZP23(科学技術--化学・化学工業--染料・顔料・塗料)
  • NDL 請求記号
    Z17-211
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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