Tetrakis(dimethylamino)ethylene chemiluminescence (TDE CL) characterization of the CMC and the viscosity of reversed microemulsions

The Journal of Physical Chemistry. B
Chien-Chang Huang, Keith L Hohn

Abstract

A new technique for the characterization of reversed microemulsions based on tetrakis(dimethylamino)ethylene (TDE) chemiluminescence (CL) has been explored. This method is based on the transport of quenching species from the continuous nonpolar phase to the interior of micelles. The emission intensity of TDE chemiluminescence was measured as a function of time for different concentrations of surfactant. These data were fit as an exponential decay, and the decay constant, k, was found. When k was plotted as a function of surfactant concentration, there was a clear change in the trend with surfactant concentration at a certain concentration; the concentration where this change occurred was concluded to be the critical micelle concentration (CMC). Using this method, the CMC of doctyl sulfosuccinate sodium salt (AOT) was evaluated in short-chain alkanes (including n-dodecane, n-decane, n-octane, n-heptane, and isooctane), cyclohexane, and mineral oil (light), while the CMCs of sodium dodecylbenzenesulfonate (NaDDBs) and Triton X-100 (X-100) were detected in cyclohexane. The CMC values were found to range from 0.61 to 2.10 mM, and they decreased with the carbon chain length of the alkane solvent. In addition, it was found that the e...Continue Reading

References

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Citations

Nov 29, 2012·Physical Chemistry Chemical Physics : PCCP·Gregory N Smith, Julian Eastoe
Feb 16, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Gregory N SmithJulian Eastoe
Oct 18, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·L'ubica KlíčováPetr Klán

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