Fundamental Properties of Aqueous Solutions of Nonionic Surfactants Prepared from Oleic Acid of High Purity

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  • YOMO Shuji
    Department of Chemistry, Faculty of Science, Tokyo Metropolitan University
  • ENDO Yukiko
    Department of Chemistry, Faculty of Science, Kitasato University
  • KATO Tadashi
    Department of Chemistry, Faculty of Science, Tokyo Metropolitan University
  • SEIMIYA Tsutomu
    Department of Chemistry, Faculty of Science, Tokyo Metropolitan University
  • IWAHASHI Makio
    Department of Chemistry, Faculty of Science, Kitasato University
  • KIDERA Yosuke
    Oleochemical Research Laboratory NOF Corporation
  • SUZUKI Masao
    Oleochemical Research Laboratory NOF Corporation

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  • 高純度オレイン酸より合成された非イオン界面活性剤水溶液の基本物性
  • コウ ジュンド オレインサン ヨリ ゴウセイサレタ ヒ イオン カイメン カッ

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Fundamental properties such as micellar weight, critical micelle concentration and cloud point were determined for aqueous solutions of polyoxyethylene (20) sorbitan monooleate (POESO) and polyoxyethylene (n) oleyl ether [POEOE and POE (10) 0E for n=20 and 10, respectively] recently prepared from oleic acid of high (>99%) and low purity. HPLC analysis and measurement of hydroxy value were conducted to clarify the distribution of the oxyethylene chain. For POESO and POEOE, no significant correlation between the above properties and oleic acid purity could be found. For POE (10) OE, however, the cloud point was higher for greater purity. This was confirmed by the temperature dependence of light scattering intensity.

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