One-pot synthesis of magnetic nanoparticles assembled on polysiloxane rod and their response to magnetic field

Koichiro Hayashi, Wataru Sakamoto, Toshinobu Yogo

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Rod-like assembled magnetite (Fe3O4) nanoparticles (NPs)were successfully synthesized in a one-pot process using a polysiloxane template derived from a dialkoxysilane. The assembly was constructed using the thiol-ene click reaction between thiol groups on the polysiloxane chain and allyl groups on Fe3O4 NPs. The thiol-containing polysiloxane chain and the allyl-containing Fe3O4 NPs were synthesized by the hydrolysis- condensation of 3-mercaptopropyl(dimethoxy) methylsilane and iron (III) allylacetylacetonate, respectively. Fe 3O4 NPs of around 5 nm were uniformly dispersed on the siloxane rods and exhibited neither remanent magnetization nor coercivity. A fluid containing a dispersion of rod-like assembled Fe3O4 NPs showed yield stress even without the application of an external magnetic field, whereas spherical Fe3O4 NPs exhibited no yield stress. The rod-like assembled Fe3O4 NPs on anisotropic siloxane clearly exhibited typical magnetorheological behavior.

Original languageEnglish
Pages (from-to)2837-2842
Number of pages6
JournalColloid and Polymer Science
Volume291
Issue number12
DOIs
Publication statusPublished - Dec 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Colloid and Surface Chemistry
  • Materials Chemistry

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