Mixed micelles of alkyltrimethylammonium halides - A small-angle neutron-scattering study

Mixed micelles of alkyltrimethylammonium halides have been studied using small-angle neutron scattering (SANS). The experiments were carried out on mixed micellar solutions (CTAB + DTAB, CTAB + TTAB and TTAB + DTAB) of surfactants with the same head group but different chain lengths. The measurements were also made from the mixture of surfactants with the same chain length but different head groups of CTAB + CDAB and CTAB + CTAC. The surfactant components were mixed in the molar proportions of 1 : 1 and the total concentration was kept 0.2 M. It is found that size, aggregation number and the fractional charge on the micelle in the mixed systems have values in between those for the pure-component systems. (C) 1998 Elsevier Science B.V. All rights reserved.