Dominant factors on the micellization of cationic urethane gemini surfactants in aqueous solution
کد مقاله : 1133-PHYSCHEM20
سارا فیاض زاده *1، پونه سادات پورحسینی2، فرهود نجفی2
1دانشگاه الزهرا
2هیأت علمی
چکیده مقاله:
A series of novel cationic urethane gemini surfactants with polymethylene spacer chain length of 2, 4 and 6
carbon atoms were studied. Electrical conductivity measurements were performed in aqueous solution at 25 C
to obtain important system parameters such as the critical micelle concentration (CMC) as well as the average
degree of micellar ionization (). The change of Gibbs free energy (ΔG°) of micellization was also calculated.
Results show that at experimental conditions, the supramolecular nanomicelles self-assemble spontaneously and
their CMC values vary with spacer chain length. Further, the average degree of micellar ionization (α) is mainly
determined by the size of the gemini surfactant nanomicelles.
کلیدواژه ها:
gemini surfactant, nanomicelle, conductivity , CMC
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