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    The study of polymer–surfactant interaction in catanionic surfactant mixtures

    Year: 2013

    Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Volume 436, 5 September 2013, Pages 890–897, 20131119

    Authors: Behnoosh Tajik, Beheshteh Sohrabi, Reza Amani, S. Majid Hashemianzadeh

    Organizations: Department of Chemistry, Surface Chemistry Research Laboratory, Iran University of Science and Technology, P.O. Box 16765-163, Tehran, Iran

    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, , and , the dependence of the compensation temperature on the polymer effect is discussed.