Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Study on the Micellization of TTAB/Brij 35 Mixed Systems in Aqueous Solutions of n-Butanol

n-부탄올 수용액에서 TTAB/Brij 35 혼합계면활성제의 미셀화에 대한 연구

  • Gil, Han-Nae (Department of Applied Chemical Engineering, Korea University of Technology & Education) ;
  • Lee, Byung-Hwan (Department of Applied Chemical Engineering, Korea University of Technology & Education)
  • 길한내 (한국기술교육대학교 응용화학공학과) ;
  • 이병환 (한국기술교육대학교 응용화학공학과)
  • Received : 2007.03.13
  • Accepted : 2007.04.10
  • Published : 2007.06.10
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Abstract

The critical micelle concentration (CMC) and the counterion binding constant (B) in a mixed micellar state of the trimethyltetradecylammonium bromide (TTAB) with the polyoxyethylene (23) lauryl ether (Brij 35) at $25^{\circ}C$ in water and in aqueous solutions of n-butanol (0.1 M, 0.2 M, and 0.3 M) were determined as a function of ${\alpha}_1$ (the overall mole fraction of TTAB) by the use of electric conductivity method and surface tensiometer method. Various thermodynamic parameters ($X_i$, ${\gamma}_i$, $C_i$, ${a_i}^M$, ${\beta}$, and ${\Delta}H_{mix}$) were calculated by means of the equations derived from the nonideal mixed micellar model. The effects of n-butanol on the micellization of TTAB/Brij 35 mixtures have been also studied by analyzing the measured and calculated thermodynamic parameters.

$25^{\circ}C$의 순수 물 및 n-부탄올 수용액(0.1 M, 0.2 M 및 0.3 M)에서 양이온 계면활성제인 trimethyltetradecylammonium bromide (TTAB)와 비이온 계면활성제인 polyoxyethylene (23) lauryl ether (Brij 35)의 혼합계면활성제의 임계미셀농도 (CMC)와 반대이온의 결합상수값(B)을 TTAB의 겉보기 몰분율(${\alpha}_1$)의 함수로서 전도도법과 표면장력계법으로 측정하였다. 이와 같이 측정한 CMC 값에 비이상적 혼합미셀화 모델을 적용함으로써 여러 가지 열역학적 함수값($X_i$, ${\gamma}_i$, $C_i$, ${a_i}^M$, ${\beta}$ 및 ${\Delta}H_{mix}$)들을 계산하고 분석하였다. 또한 TTAB/Brij 35 혼합계면활성제의 미셀화에 미치는 n-부탄올의 농도에 따른 열역학 함수값들의 변화를 측정하고 분석하였다.

Keywords

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