Synthesis and Properties of Multiple-chain Surfactants Bearing Multiple Ionic Head Groups

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  • NAKATSUJI Yohji
    Department of Applied Chemistry, Faculty of Engineering, Osaka University
  • IKEDA Isao
    Department of Applied Chemistry, Faculty of Engineering, Osaka University

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  • 多疎水鎖多親水基型イオン性界面活性剤の合成と物性
  • タ ソスイ サ タ シンスイキガタ イオンセイ カイメン カッセイザイ ノ ゴ

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Abstract

A variety of double-chain or triple-chain surfactants with two or three ionic head groups such as sulfonate, sulfate, carboxylate, phosphate, ammonium, and taurine were prepared according to conventional synthetic procedures and their surface properties were compared with those of the corresponding single-chain surfactant with one ionic group. The former showed much better micelle forming ability, ability to lower surface tension and solubility in water than the latter. These findings are reasonably explained by considering the change in the intra- and intermolecular interactions. This method, which simply combines two or three single-chain surfactants using an appropriate skeletal structure, should be useful for the molecular design of surfactants.

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