Synthesis of PEO-based block copolymers bearing cyclic hydrazide or carboxylic acid moieties and their applications as stabilizers for Fe 3O4 nanoparticles

Jinheung Kim, Sangmi Lee, Joo Hyeon Nam, Young Jun Cho, Joohoon Kim, Jae Yeol Lee, Ho Jung Kang, Sehoon Kim, Hoon Tae Kim, Heung Mok Park, Jungahn Kim

Research output: Contribution to journalArticle

3 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)716-721
Number of pages6
JournalMacromolecular Research
Issue number7
Publication statusPublished - 2011 Jul 1
Externally publishedYes



  • anionic block copolymerization
  • deimidation
  • iron oxide nanoparticles
  • poly(ethylene oxide-b-maleic acid)
  • poly(ethylene oxide-b-maleic hydrazide)

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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