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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 56, Number 5
JKCSEZ 56(5)
October 20, 2012 

Mixed Micellizations of TTAB with Other Surfactants (DTAB, CTAB, Tween-20, Tween-40, and Tween-80)

TTAB와 다른 계면활성제(DTAB, CTAB, Tween-20, Tween-40 및 Tween-80)와의 혼합미셀화에 대한 연구
Nam Min Lee, Byung Hwan Lee*

이남민, 이병환*
Critical micelle concentration, Counter-ion binding constant, Mixed micellization, Solubilization, Non-ideal mixed micellar model
The critical micelle concentration (CMC) and the counter-ion binding constant (B) for the mixed micellizations of TTAB (tetradecyltrimethylammonium bromide) with other surfactants (DTAB, CTAB, Tween-20, Tween-40, and Tween- 80) in aqueous solution of 4-chlorobenzoic acid (0.5 mM) at 25 oC were determined as a function of α1 (the overall mole fraction of TTAB) by using the spectrophotometric method and the conductivity method. Various thermodynamic parameters (Xi, γi, Ci, ai M, β, and ΔHmix) were calculated for each mixed surfactant system and compared with the other mixed surfactant systems by means of the equations derived from the nonideal mixed micellar model. The results show that TTAB/DTAB mixed system has a great positive deviation from the ideal mixed micellar model and the other mixed systems have great negative deviations from the ideal mixed model.
556 - 562
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