Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Solubilization of Cresol Isomers by the Cationic Surfactant of TTTAB in Aqueous Solution of n-Butanol and NaCl

n-부탄올 및 NaCl 수용액에서 양이온 계면활성제인 TTAB에 의한 크레졸 이성질체들의 가용화에 대한 연구

  • Lee, Byung-Hwan (Department of Applied Chemical Engineering, Korea University of Tech. & Education)
  • 이병환 (한국기술교육대학교 응용화학공학과)
  • Received : 2021.05.12
  • Accepted : 2021.06.30
  • Published : 2021.06.30
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Abstract

We tried to investigate the effects of substituent position, temperature, and additives such as NaCl and n-butanol on the solubilizations of cresol isomers by tetradecyltrimethylammonium bromide (TTAB), using the UV-Vis spectrophotometric method. The measured solubilization constants (Ks) values for each cresol isomer increased in the order o-cresolo and ∆Ho values for the solubilizations of cresols were all negative values but the ∆So values were all positive values within the measured ranges. The values of ∆Go increased also with increasing the concentration of n-butanol but decreased with increasing the concentration of NaCl. From these facts, we could conclude that both the enthalpy and entropy changes contribute together for the solubilizations of cresols isomers by cationic surfactant of TTAB and they are solubilized in the polar palisade region or at the surface of micelle.

양이온 계면활성제인 tetradecyltrimethylammonium bromide (TTAB)에 의한 크레졸 이성질체의 가용화에 미치는 치환기, 온도 그리고 NaCl과 n-부탄올과 같은 첨가제의 효과를 UV-Vis법으로 측정하였다. 가용화상수(Ks)값은 o-크레졸s값은 감소하였다. 크레졸 이성질체들의 가용화에 대하여 계산한 ∆Go값과 ∆Ho값은 모두 음의 값을 나타내었다. 그러나 ∆So값은 모두 양의 값을 나타내었다. 또한 ∆Go값은 n-부탄올의 농도가 증가할수록 증가하는 경향을 그러나 NaCl의 농도가 증가할수록 더욱 감소하는 경향을 보였다. 이러한 사실들로부터 크레졸 이성질체들의 가용화에는 엔탈피와 엔트로피가 동시에 기여하고 있으며, 또한 크레졸분자들이 가용화되는 위치는 미셀의 표면이나 palisade층에서 주로 이루어짐을 알 수 있다.

Keywords

Acknowledgement

본 연구는 한국기술교육대학교의 2021년도 교육연구진흥비에 의해 수행된 것이며, 연구지원에 감사드립니다.

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