Magnetite‐polylactic acid core–shell nanoparticles by ring‐opening polymerization under microwave irradiation |
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| Authors: | Alexandrina Nan Rodica Turcu Jürgen Liebscher |
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| Institution: | 1. National Institute of R&D for Isotopic and Molecular Technologies, Department Physics of Nanostructured Systems, Donath 65‐103, Cluj‐Napoca, Romania;2. Institute of Chemistry, Humboldt‐University Berlin, Brook‐Taylor 2, 12489 Berlin, Germany |
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| Abstract: | The synthesis of magnetic core–shell nanoparticles consisting of magnetite cores surface‐functionalized by glycolic acid covered by polylactic acid was performed by applying the “grafting‐from” strategy, where the polymerization is initiated from the particle surface. The surface initiated ring‐opening polymerization of D,L ‐lactide was initiated by tin (II) 2‐ethylhexanoate using microwave irradiation. Core–shell nanoparticles of high colloidal stability in water were obtained in this way. The morphology of the magnetic core–shell nanostructure was determined by transmission electron microscopy, and the chemical structure was elucidated by Fourier transform infrared spectroscopy (FTIR) and X‐ray photoelectron spectroscopy. Magnetic measurements revealed superparamagnetic behavior and high magnetization values. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012 |
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| Keywords: | irradiation nanoparticles ring‐opening polymerization |
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