Interaction of Oppositely Charged Polymer- Surfactant System Based on Surface Tension Measurements

The interaction between oppositely charged polymersurfactant systems has been studied using surface tension measurements wherein the dependence of interaction phenomenon over the presence of anionic polyelectrolyte sodium carboxymethylcellulose (NaCMC) with variation of tail length of cationic surfactants, cetyltrimethylammonium bromide (CTAB), tetradecyltrimethylammonium bromide (TTAB), and dodecyltrimethylammonium bromide (DTAB) was investigated. It is observed that the cationic surfactants induced cooperative binding with the anionic polyelectrolyte at critical aggregation concentration (cac) and the cac values are considerably lower than the corresponding critical micelle concentration (cmc) for each of the surfactant irrespective of their hydrophobic tail size. The cmc of surfactants were observed at slightly higher surfactant concentration in polyelectrolyte solution than that in pure water. It was found that the surfactants with longer tail size strongly favour the interaction with NaCMC, indicating the dependence of aggregation phenomenon on the tail size of the surfactants.

並列關鍵字

Cationic Surfactants ； Anionic Polyelectrolyte ； Surface Tension ； Tail Size

國際替代計量

全文下載

主題瀏覽