Solubilization of Aromatic Compounds by Vesicles Prepared with Double-Chained Cationic Surfactants

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  • KAISE Chihiro
    Faculty of Science and Technology, Science University of Tokyo
  • SAKAI Hideki
    Faculty of Science and Technology, Science University of Tokyo Institute of Colloid and Interface, Science University of Tokyo
  • KONDO Yukishige
    Institute of Colloid and Interface, Science University of Tokyo Faculty of Engineering, Science University of Tokyo
  • YOSHINO Norio
    Institute of Colloid and Interface, Science University of Tokyo Faculty of Engineering, Science University of Tokyo
  • ABE Masahiko
    Faculty of Science and Technology, Science University of Tokyo Institute of Colloid and Interface, Science University of Tokyo

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Other Title
  • アルキル鎖長の異なる二鎖型力チオン界面活性剤ベシクルによる芳香族化合物の可溶化
  • アルキル鎖長の異なる二鎖型カチオン界面活性剤ベシクルによる芳香族化合物の可溶化
  • アルキルサチョウ ノ コトナル 2サガタ カチオン カイメン カッセイザイ ベ

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Abstract

Solubilization of aromatic compounds by dialkyldimethylammonium bromide {(Cn H2n+1) 2 (CH3)2N+Br- ; DDAB (n=12), DTDAB (n=14), DHDAB (n = 16)} vesicles was investigated with the equilibrium dialysis method, fluorescence probe method, and dynamic-light scattering method. The results showed that solubilization equiliblium constant (K0) of 3-phenylpropionic acid (HCA), which has a hydrophilic group in the molecule, increased considerably with increasing the alkyl chain length. It was also found that the moleculer interaction between surfactant and oily material in vesicle increased with an increase in the alkyl chain length. The stability of DDAB vesicle in the long term was much greater than those of DTDAB and DHDAB vesicles. Moreover, the effects of particle size and hydration state on the solution properties of the vesicles were discussed.

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