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Janus Micelle Formation Induced by Protonation/Deprotonation of Poly(2‐vinylpyridine) ‐block‐ Poly(ethylene oxide) Diblock Copolymers
Author(s) -
Li Xue,
Yang Hui,
Xu Limei,
Fu Xiaoning,
Guo Huanwang,
Zhang Xiaokai
Publication year - 2010
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200900366
Subject(s) - micelle , copolymer , ethylene oxide , janus , protonation , polymer chemistry , vesicle , amphiphile , chemistry , deprotonation , oxide , materials science , aqueous solution , organic chemistry , membrane , polymer , nanotechnology , ion , biochemistry
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.