Magnetic properties of nanoparticle-polymer composites prepared using surface modification and cross-linking reaction

Kazuaki Shimba, Kiyotaka Furuta, Nobuyuki Morimoto, Nobuki Tezuka, Satoshi Sugimoto

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Polymer composites of magnetic particles are widely used as microwave absorbers. An effective method for obtaining thinner microwave absorbers for device mounting is to increase the volume fraction of magnetic nanoparticles within the composites such that the permeability is enhanced. In this study, composites were prepared using magnetite nanoparticles surface-modified with 4-META (4-methacryloylioxyethyl trimellitate anhydride) and cross-linked with PEG-4SH (pentaerydiritol tetra-polyethylene glycol ether with four thiol-modified terminals). These composites have a higher volume fraction of nanoparticles (up to 62 vol%) and higher permeability than conventional epoxy resin composites. In addition, the prepared composites showed good microwave absorption properties (R.L. < -20dB) with a smaller matching thickness (d = 8.0 mm) than the epoxy resin composites (d = 9.0 mm).

Original languageEnglish
Pages (from-to)486-490
Number of pages5
JournalMaterials Transactions
Volume52
Issue number3
DOIs
Publication statusPublished - 2011 Mar

Keywords

  • Cross-linking
  • Magnetic nanoparticles
  • Magnetite
  • Microwave absorbers
  • Surface modification

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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