The study of polymer–surfactant interaction in catanionic surfactant mixtures
2013
Tajik, Behnoosh | Sohrabi, Beheshteh | Amani, Reza | Hashemianzadeh, S Majid
Aggregation behavior in mixtures of cetyltrimethylammonium bromide (CTAB), sodiumdodecylsulfate (SDS) and polyethyleneglycol (PEG) in anionic- and cationic-rich regions has been investigated by tensiometry, conductometry and cyclic voltammetry (CV). The size of particles and the inter-micellar interaction parameter in SDS/CTAB/PEG system were studied by CV. CV measurements show that the number of micelles decreased, since the inter-micellar interaction coefficient (kd) decreased with an increase in polymer concentration and enhanced binding of surfactant monomers to the PEG. Also, on the basis of CMC, ΔGagg0, ΔHagg0 and ΔSagg0, the dependence of the compensation temperature on the polymer effect is discussed.
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