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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 50, Number 5
JKCSEZ 50(5)
October 20, 2006 
 
Title
 Effect of n-Butanol on the Micellization of DBS/Brij 35 Mixed Surfactant Systems

DBS/Brij 35 혼합계면활성제의 미셀화에 미치는 n-부탄올 효과
Author
 In-Jung Park, Byung-Hwan Lee*

박인정, 이병환*
Keywords
 DBS, Brij 35, 임계미셀농도, 반대이온 결합상수, 비이상적 혼합미셀모델 , DBS, Brij 35, Critical Micelle Concentration, Counter Ion Binding Constant, Non Ideal Mixed Micellar Model
Abstract
 25 oC의 순수 물 및 n-부탄올 수용액(0.1M, 0.2M, 0.3M)에서 음이온 계면활성제인 sodium dodecyl benzenesulfonate(DBS)와 비이온 계면활성제인 dodecyl polyoxyethylene(23) lauryl ether(Brij 35)의 혼합계면활성제의 임계미셀농도(CMC)와 반대이온의 결합상수값(B)을 DBS의 겉보기 몰분율(α1)의 함수로서 전도도법과 표면장력계법으로 측정하였다. 이와 같이 측정한 CMC값에 비이상적 혼합미셀화모델을 적용함으로써 여러 가지 열역학적 함수값(Xi, γi, Ci, aiM, β 및 ΔHmix)들을 계산하고 분석하였다. 그리고 DBS/Brij 35 혼합계면활성제의 미셀화에 미치는 n-부탄올의 농도에 따른 열역학 함수값들의 변화를 측정하고 분석하였다.

The critical micelle concentration (CMC) and the counterion binding constant (B) in a mixed micellar state of the sodium dodecylbenzenesulfonate (DBS) with the polyoxyethylene(23) lauryl ether (Brij 35) at 25 oC in water and aqueous solutions of n-butanol (0.1 M, 0.2M, and 0.3 M) were determined as a function of a1 (the overall mole fraction of DBS) by the use of electric conductivity method and surface tensiometer method. Various thermodynamic parameters (Xi, γi, Ci, aiM, β, and ΔHmix) were calculated by means of the equations derived from the nonideal mixed micellar model. The effect of n-butanol on the micellization of the DBS/Brij 35 mixtures has been also studied by analyzing the measured and calculated thermodynamic parameters.

Page
 355 - 0
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