Surface-initiated ATRP of HEA from nanocrystal alpha-Fe2O3 under ultrasonic irradiation

J Nanosci Nanotechnol. 2005 Oct;5(10):1713-7. doi: 10.1166/jnn.2005.194.

Abstract

Core/shell poly(beta-hydroethyl acrylate) (PHEA) encapsulated nanocrystal alpha-Fe2O3 nanospheres (Fe2O3@PHEA) were successfully prepared by the surface-initiated atom transfer radical polymerization (SI-ATRP) of beta-hydroethyl acrylate (HEA), a functional monomer, from the surfaces of the nanocrystal Fe2O3 modified with bromo-acetamide groups with the catalysts of 1,10-phenanthroline and Cu(I)Br under ultrasonic irradiation at room temperature in water. The products, Fe2O3@PHEA, were characterized by elemental analysis (EA), FT-IR, XRD, XPS and TEM. The percentage of grafting (PG%) of 38.95% and the conversion of HEA (C%) of 14.29% at room temperature for 6 h with ultrasonic irradiation were higher than the 22.41% and 8.22%, respectively, found for samples prepared by electromagnetic stirring. This demonstrated that the ultrasonic irradiation improves the SI-ATRP of HEA.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acrylates / analysis
  • Acrylates / chemistry*
  • Coated Materials, Biocompatible / analysis
  • Coated Materials, Biocompatible / chemistry*
  • Crystallization / methods*
  • Ferric Compounds / analysis
  • Ferric Compounds / chemistry*
  • Ferric Compounds / radiation effects
  • Materials Testing
  • Nanostructures / analysis
  • Nanostructures / chemistry*
  • Nanostructures / ultrastructure*
  • Nanotechnology / methods
  • Particle Size
  • Sonication*
  • Surface Properties

Substances

  • Acrylates
  • Coated Materials, Biocompatible
  • Ferric Compounds
  • ferric oxide