Polymerized assemblies of cationic gemini surfactants in aqueous solution.
A variety of polymerized assemblies of cationic gemini surfactants has been demonstrated as a function of the electrolyte concentration in aqueous solution. The gemini surfactant consists of two cationic monomeric surfactants linked with an ethylene spacer at the level of the quaternary ammonium groups. Polymerizable methacryloxy groups are covalently attached to the terminal of the hydrocarbon chains. In the lower electrolyte concentration region, radical polymerization results in the formation of spherical aggregates [Langmuir 22 (2006) 8293]. However, in the higher electrolyte concentration region, elongated tubular hollow assemblies are observed with transmission electron microscopy, as a result of polymerization of vesicular hollow assemblies spontaneously formed in the aqueous solution. These experimental results suggest that it is possible to prepare different shapes of polymerized assemblies by changing the electrolyte concentration.
Abe
Masahiko
M
Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan.
Koike
Takaaki
T
Nishiyama
Hironori
H
Sharma
Suraj Chandra
SC
Tsubone
Kazuyuki
K
Tsuchiya
Koji
K
Sakai
Kenichi
K
Sakai
Hideki
H
Shchipunov
Yury A
YA
Schmidt
Judith
J
Talmon
Yeshayahu
Y