Formation of organized structures in systems of polyelectrolyte-ionic surfactants

Summary

The interaction of polyelectrolytes with ionic surfactants is studied by turbidimetry and electron micrography. The turbidity of the mixed solution of PVS (poly(vinyl sulfate)) and CTAB (cetyltrimethylammonium bromide) showed a sharp maximum at the mole ratio of 1∶1, indicating quantitative binding between PVS and CTAB. A multilayer structure was observed on the electron micrograph only at the mole ratio of PVS:CTAB=2∶1 with a spacing of about 25A. At the mole ratio of PVS:CTAB=1∶1, a single strand structure was observed. The system of ionene polymer (3,4) $\left( {\begin{array}{*{20}c} + \\ {\text{N}} \\ \end{array} {\text{CH}}_{\text{2}} )_3 - \begin{array}{*{20}c} + \\ {\text{N}} \\ \end{array} {\text{CH}}_{\text{2}} )4} \right)$-SDS (sodium lauryl sulfate) forms a multilayer structure at the equivalent ratio of 1∶1 with a spacing of 20A.