Study on the interaction mechanism of surfactant CTAB/g with PVA complex in aqueous solution
QIU Ling-guang, ZHANG Shi-run,LIU Hui, XIE An-jian, SHEN Yu-hua(School of Chemistry and Chemical Engineering, Anhui University, Hefei230039, China)
Interactions between a cationic surfactant, cetyltrimethyl ammonium bromide (CTAB) and a water-soluble polymer polyvinyl alcohol (PVA) were investigated by means of viscosity and electric conductance. It was found that PVA displayed a special viscosity behavior in aqueous solution containing the surfactant CTAB because of the molecular interaction of the polymer and the surfactant, and the special viscosity depends on ionization of the surfactant, as well as polymer concentration and surfactant concentration. The surfactant micelle/polymer model was revised to develop a new conception to describe the dependence of the solution viscosity on the (ionization0 of surfactant micelle, and the new equation proved to be in good agreement with the (experimental0 data.