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Effects of Surfactant Molecules’ Head- and Tail-groups on the Solubilization of p-Chlorobenzoic Acid

p-클로로벤조산의 가용화에서 계면활성제분자의 머리-그룹과 꼬리-그룹이 미치는 효과

Lee, Byung-Hwan;Lee, Nam-Min
이병환;이남민

  • Received : 2015.05.19
  • Accepted : 2015.07.22
  • Published : 2015.10.20

Abstract

The solubilization of p-chlorobenzoic acid in aqueous solutions of pure cationic, nonionic, amphoteric, and their mixed surfactant systems have been measured by the UV-Vis spectrophotometric method. The effects of hydrophobic tail-group with different chain length and the hydrophilic head-group on the solubilization of p-chlorobenzoic acid have been studied and also thermodynamic parameters have been calculated from the dependence of Ks values on the temperature. The results show that the values of ΔGo for the solubilization by all surfactant systems are negative and the values of ΔHo and ΔSo are all positive.

Keywords

Benzoic acid;Solubilization constant;Critical micelle concentration;Surfactant;Micellization

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