Physico-chemical properties of aqueous solutions of Cn--1H2 n -1OCH2COONa.

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概要

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• Properties of aqueous solutions of surfactants, C<SUB><I>n</I>−1</SUB>H<SUB>2<I>n</I>−1</SUB>OCH<SUB>2</SUB>COONa (<I>n</I>−1=12–18), which may be nontoxic, non-allergic and bio-degradable, have been studied. The Krafft points in aqueous solutions of these surfactants are close (+8.5–−1.5 °C) to those of the corresponding fatty acid soaps R<I><SUB>n</SUB></I>COONa. The critical micelle concentrations are also close to those of corresponding fatty acid soaps in spite of the introduction of an oxygen atom in the hydrocarbon chain. A study of the effect of water hardness on the solubility revealed that this type of surfactant is, unlike soap, soluble in town water (hardness 4°) in the presence of equal weight of tripolyphosphate.

• 公益社団法人 日本化学会の論文

著者

• Shinoda Kozo

  Department of Chemistry Faculty of Engineering Yokohama National University

• Hato Masakatsu

  Department of Chemistry, Faculty of Engineering, Yokohama National University

• Miyagawa Toru

  Department of Chemistry, Faculty of Engineering, Yokohama National University

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