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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 53, Number 5
JKCSEZ 53(5)
October 20, 2009 

Comparative Study on the Mixed Micellizations of Anionic Surfactant (DBS) with Nonionic Surfactnats (Brij 30 and Brij 35)

음이온성 계면활성제(DBS)와 비이온성 계면활성제(Brij 30과 Brij 35) 와의 혼합미셀화에 대한 비교연구
In Jung Park, Byung Hwan Lee*

박인정, 이병환*
DBS, Brij 35, Brij 30, 임계미셀농도, 반대이온 결합상수, 비이상적 혼합미셀 모델 , DBS, Brij 35, Brij 30, Critical micelle concentration, Counter ion binding constant, Non ideal mixed micellar model
25 oC의 순수 물 및 n-부탄올 수용액에서 음이온성 계면활성제인 DBS (sodium dodecylbenzenesulfonate)와 비이온성 계면활성제인 Brij 30 (polyoxyethylene(4) lauryl ether)과 Brij 35 (polyoxyethylene(23) lauryl ether)의 혼합미셀화에 대한 임계미셀농도(CMC)와 반대이온의 결합상수값(B)을 DBS의 겉보기 몰분율(α1)의 함수로서 전도도법으로 측정하였다. 이와 같이 측정한 CMC값에 비이상적 혼합미셀화 모델을 적용함으로써 여러 가지 열역학적 함수값(Xi, γi, Ci, ai M, β 및 △Hmix)들을 계산하여 상호 비교분석하였다. 그 결과, DBS는 Brij 30보다는 Brij 35와 더욱 강한 결합을 이루었으며 이상적 혼합미셀화로 부터 더욱 큰 음의 벗어남을 보였다.

The critical micelle concentration (CMC) and the counter ion binding constant (B) for the mixed micellizations of DBS (sodium dodecylbenzenesulfonate) with Brij 30 (polyoxyethylene(4) lauryl ether) and Brij 35 (polyoxyethylene(23) lauryl ehter) at 25 oC in pure water and in aqueous solutions of n-butanol were determined as a function of α1 (the overall mole fraction of DBS) by the use of electric conductivity method. Various thermodynamic parameters (Xi, γi, Ci, ai M, β, and △Hmix) were calculated and compared for each mixed surfactant system by means of the equations derived from the nonideal mixed micellar model. The results show that the molecules of DBS interact more strongly with Brij 35 than Brij 30 and that the DBS/Brij 35 mixed system has greater negative deviation from the ideal mixed micellar model than the DBS/Brij 30 mixed system.

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