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KMID : 1059520090530020118
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Journal of the Korean Chemical Society
2009 Volume.53 No. 2 p.118 ~ p.124
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Study on the Micellization of CPC/Brij 35 Mixed Surfactant Systems in Water
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Gil Han-Nae
Lee Byung-Hwan
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Abstract
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The values of critical micelle concentration (CMC) and counter ion binding constants (B) in a micellar state of CPC (1-hexadecylpyridinium chloride) with Brij 35 (polyoxyethylene(23) lauryl ether) in water were determined as a function of α1(the overall mole fraction of CPC) by the use of electric conductivity method. Various thermodynamic parameters (Xi, γi, Ci,αiM, β, and ΔHmix) were calculated and analyzed by means of the equations derived from the non-ideal mixed micellar model. And thermodynamic parameters (ΔGom, ΔHom, and ΔSom) for the micellization of CPC/Brij 35 mixtures were also calculated from the temperature dependence of the CMC values. The values of ΔGom are all negative, but the values of ΔSom and ΔHom are positive or negative, depending on the measured temperature and α1.
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KEYWORD
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CPC, Brij 35, Critical Micelle Concentration, Counter Ion Binding Constant, Non-ideal Mixed Micellar Model, Iso-Structural Temperature
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