Studies on Interaction between Castor Oil and Dissolved Water by Hot Wire Method

  • TAKAOKA Kyo
    Department of Energy Science and Engineering, Faculty of Engineering, Musashi Insutitute of Technology
  • KOBAYASHI Koichi
    Department of Energy Science and Engineering, Faculty of Engineering, Musashi Insutitute of Technology
  • TAKAHASHI Masashi
    Department of Energy Science and Engineering, Faculty of Engineering, Musashi Insutitute of Technology
  • SONE Mototaka
    D epartment of Electrical and Electronics Engineering, Faculty of Engineering, Musashi Institute of Technology

Bibliographic Information

Other Title
  • 細線加熱法によるひまし油と溶存水との相互作用の検討
  • サイセン カネツホウ ニ ヨル ヒマシユ ト ヨウゾンスイ ト ノ ソウゴ サヨウ ノ ケントウ

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Abstract

The effect of added water on structual change in castor oil was studied by a hot wire method. The change in kinematic-viscosity coefficients for anhydrous and hydrous castor oil were measured to evaluate the interaction between water and castor oil molecules.<BR>The kinematic-viscosity coefficient gradually in creases with increasing the water content and reaches the maximum value at 4075 ppm of water. However, with the further increase in water, the kinematicvisocosity coefficient sharply decreases due to the destruction in the liquid structure of castor oil. Eventually, the maximum value is attained at the solubility limit of water in oil.<BR>The ratio of the number of hydroxy groups of glycerol triricinoleate in the castor oil to the amount of water molecule is 5/mol H2O at the maximum kinematic-viscosity coefficient, where the liquid structure is developed due to the intermolecular crosslinking of water.<BR>However, the crosslinking of water disappears at the solu bility limit of water and a water cluster is formed. In this case, water acts as a kind of a plasticizer and decreases the kinematic-viscosity coefficient.<BR>The liquid sturucture is gradually destroyed at each water content with the rise in temperature from 10 to 50°C and it almost disappears at 60°C.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1999 (10), 649-654, 1999-10-10

    The Chemical Society of Japan

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