title: Vesicle formation and stability in aqueous mixtures of the hydrolyzed copolymer of styrene-maleic anhydride and conventional single-tailed cationic surfactants.
abstract: Vesicle formation in aqueous mixtures of the hydrolyzed copolymer of styrene-maleic anhydride (HSMA) and a series of single-tailed cationic surfactants (C(n)H(2n+1)N(C(m)H(2m+1))3Br, n = 8, 10, 12, 16, m = 1, 2, 3, 4) was studied by fluorescence measurement, zeta potential measurement, and transmission electron microscopy. The driving forces of vesicle formation in this kind of system are attributed to the combination of electrostatic attraction and the hydrophobic interaction. Variation of the surfactant structure had a great influence on vesicle formation. A model for the conformation of the molecular packing in the vesicle membrane was suggested on the basis of XRD measurement and Chem3D simulation. Moreover, these vesicles showed superstability to aging time, to NaBr, and to ethanol.
authors.affiliation: State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People's Republic of China.
authors.forename: Jingxia
authors.initials: J
authors.lastname: Yao
authors.forename: Sheng
authors.initials: S
authors.lastname: Lei
authors.forename: Jianbin
authors.initials: J
authors.lastname: Huang
authors.forename: Yuan
authors.initials: Y
authors.lastname: Feng
authors.forename: Zichen
authors.initials: Z
authors.lastname: Li
authors.forename: Honglan
authors.initials: H
authors.lastname: Fu