New approach for the studies of physicochemical parameters of interaction of Triton X-100 with cationic surfactants

The interaction of cationic surfactants (alkyltrimethylammonium bromide) wi th Triton X-100 (p-(1,1,3,3-tetramethylbutyl) poly (oxyethylene)) as nonion ic surfactant has been investigated using potentiometeric and surface tensi on techniques. New methods have been used to evaluate the values of physico chemical parameters, concentration of free monomer of ionic and nonionic su rfactants, degree of dissociation of ionic surfactant and the mole fraction of surfactants in mixed micelles. The comparison between these new techniq ues and previous methods indicates noticeable difference between the values of calculated synergetic parameters. The comparison between the values of cmc that have been measured by above two techniques, indicates a synergisti c effect for C(18)TAB (octadecyltrimethylammonium bromide) with Triton X-10 0 whereas a cosurfactant effect has been observed between C(12)TAB (dodecyl trimethylammonium bromide), C(14)TAB (tetradecyltrimethylammonium bromide), C(16)TAB (hexadecyltrimethylammonium bromide), and Triton X-100. (C) 2000 Elsevier Science B.V. All rights reserved.