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Janus Micelle Formation Induced by Protonation/Deprotonation of Poly(2-vinylpyridine)-block-Poly(ethylene oxide) Diblock Copolymers

✍ Scribed by Xue Li; Hui Yang; Limei Xu; Xiaoning Fu; Huanwang Guo; Xiaokai Zhang

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
579 KB
Volume
211
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

A novel approach to amphiphilic polymeric Janus micelles based on the protonation/deprotonation process of poly(2‐vinylpyridine)__‐block‐poly(ethylene oxide) (P2VP‐b‐PEO) diblock copolymers in THF is presented. It is found that addition of HCl to the micelles solution of P2VP‐b‐__PEO copolymers leads to the formation of vesicles. Subsequently mixing a small amount of hydrazine monohydrate with the vesicle solution can induce the dissociation and reorganization of the vesicles into Janus micelles. When HCl is replaced by HAuCl~4~ precursors, composite Janus particles containing gold in P2VP blocks are obtained.

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