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Surface-Initiated ATRP of HEA from Nanocrystal α-Fe2O3 Under Ultrasonic Irradiation

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Abstract:

Core/shell poly(-hydroethyl acrylate) (PHEA) encapsulated nanocrystal α-Fe2O3 nanospheres (Fe2O3@PHEA) were successfully prepared by the surface-initiated atom transfer radical polymerization (SI-ATRP) of -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.

Keywords: ATOM TRANSFER RADICAL POLYMERIZATION; CORE/SHELL; ENCAPSULATION; NANOCRYSTAL FE2O3; POLY(BETA-HYDROETHYL ACRYLATE); SURFACE-INITIATED; ULTRASONIC IRRADIATION

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2005.194

Publication date: October 1, 2005

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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