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Synthesis of PEO-based block copolymers bearing cyclic hydrazide or carboxylic acid moieties and their applications as stabilizers for Fe3O4 nanoparticles
| Journal | Macromol. Res. |
|---|---|
| Author | Jinheung Kim, Sangmi Lee, Joo Hyeon Nam, Young Jun Cho, Joohoon Kim, Jae Yeol Lee, Ho-Jung Kang, Sehoon Kim, Hoon Tae Kim and Heung Mok Park, et al. |
| Citation | Macromol. Res., Vol. 19, No. 7, pp 716-721 (2011) |
| DOI | http://dx.doi.org/10.1007/s13233-011-0716-0 |
In this paper, a useful synthetic method for poly(ethylene oxide)-based block copolymers and their applications for preparation of iron oxide nanoparticles were introduced. Poly(ethylene oxide-b-N-phenylmaleimide) was first synthesized by anionic block copolymerization of ethylene oxide and N-phenylmaleimide (N-PMI) using mixed alkali metal alkoxides via the sequential monomer addition technique in a mixture of benzene dimethylsulfoxide (DMSO)/tetrahydrofuran (THF) (30/5/6∼20, v/v/v) at room temperature. Reductive deimidation of the resulting block copolymers under different reaction conditions using hydrazine monohydrate led to the formation of the corresponding water-soluble poly(ethylene oxide-b-maleic hydrazide) under acidic conditions and poly(ethylene oxideb-maleic acid) under basic conditions. Both were found to be very efficient stabilizers to prepare superparamagnetic iron oxide nanoparticles.
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