Acta Phys. -Chim. Sin. ›› 2006, Vol. 22 ›› Issue (08): 913-916.doi: 10.1016/S1872-1508(06)60039-9

• COMMUNICATION •     Next Articles

Multivalent Metal Ion Induced Vesicle Aggregation in Aqueous Polyelectrolyte-surfactant System

YAO Jing-Xia;ZHAO Ying;HUANG Jian-Bin   

  1. State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
  • Received:2006-04-27 Revised:2006-05-19 Published:2006-08-04
  • Contact: HUANG Jian-Bin E-mail:JBHuang@pku.edu.cn

Abstract:

The vesicle aggregation induced by multivalent metal ions in the mixed system of polyelectrolyte(hydrolyzed random copolymer of maleic anhydride-styrene, SMA)-surfactant(dodecyltriethylammonium bromide, DEAB) was investigated through transmission electron microscopy (TEM) observation and turbidity measurement. It was found that a small quantity of Ca2+ (in the magnitude of 10-4 mol·L-1) can induce vesicle aggregation. Adding EDTA can dissociate the vesicle aggregation. Further investigation suggested that the vesicle aggregation followed the salt-linkage mechanism.

Key words: Vesicle, Vesicle aggregation, Multivalent metal ion, Polyelectrolyte-surfactant system