Morphology transformation of micrometre-sized giant vesicles based on physical conditions for photopolymerisation-induced self-assembly

作者：Yoshida Eri^*

来源：Supramolecular Chemistry, 2015, 27(4): 274-280.

DOI：10.1080/10610278.2014.959014

• photopolymerisation-induced self-assembly
• amphiphilic random block copolymers
• morphology transformation
• spherical vesicles
• physical conditions

The physical conditions to vary the morphology of vesicles formed by amphiphilic poly(methacrylic acid)-block-poly(methyl methacrylate-random-methacrylic acid) were determined for the self-assembly induced by the nitroxide-mediated photocontrolled/living radical polymerisation performed in an aqueous methanol solution. The copolymer produced micrometre-sized spherical vesicles in the solution with a 30wt% water content. The vesicles were transformed into a film-like morphology by decreasing the water content, whereas they were changed into nanometre-sized spherical vesicles by increasing it. The concentration of the growing polymer chain also varied the morphology. Large spherical vesicles formed at a low concentration were transformed into much smaller vesicles, followed by rod-like vesicles as a result of increasing the concentration. Furthermore, the stirring speed during the polymerisation-induced self-assembly dominated the morphology. Large elliptical vesicles produced at a low stirring speed changed into spherical vesicles, but decreased the size as the speed increased.

• 出版日期2015-4-3