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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 30, Number 9
BKCSDE 30(9)
September 20, 2009

Title	Thermal Behavior of Critical Micelle Concentration from the Standpoint of Flory-Huggins Model
Author	Kyung Hee Lim
Keywords	Critical micelle concentration, Thermal behavior, Flory-Huggins model, Lattice theory, Heat capacity change of micellization
Abstract	Temperature dependence of the critical micelle concentration (CMC), x_CMC, in micellization can be described by ln x_CMC = A + BT + C lnT + D/T, which has been derived statistical-mechanically. Here A, B, C, and D are fitting parameters. The equation fits the CMC data better than conventionally used polynomial equations of temperature. Moreover, it yields the unique(exponent) value of 2 when the CMC is expressed in a power-law form. This finding is quite significant, because it may point to the universality of the thermal behavior of CMC. Hence, in this article, the nature of the equation ln x_CMC = A + BT + C lnT + D/T is examined from a lattice-theory point of view through the Flory-Huggins model. It is found that a linear behavior of heat capacity change of micellization is responsible for the CMC equation of temperature.
Page	2001 - 2006
Full Text	PDF

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