1. Synthesis and characterization of poly( ɛ-caprolactone)/Feo nanocomposites by in situ polymerization.
- Author
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Wang, Guang-shuo, Wang, Ling, Wei, Zhi-yong, Sang, Lin, Dong, Xu-feng, Qi, Min, Chen, Guang-yi, Chang, Ying, and Zhang, Wan-xi
- Subjects
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CAPROLACTONES , *NANOCOMPOSITE materials , *IRON oxide nanoparticles , *CHEMICAL synthesis , *FOURIER transform infrared spectroscopy , *X-ray diffraction , *POLYMERIZATION , *CHEMICAL structure - Abstract
A series of magnetic nanocomposites based on poly( ɛ-caprolactone) (PCL) and FeO nanoparticles were prepared using a facile in situ polymerization method. The chemical structures of the PCL/FeO nanocomposites were characterized by Fourier transform infrared (FTIR) spectroscopy. Results of wide-angle X-ray diffraction (WAXD) showed that the incorporation of the FeO nanoparticles did not affect the crystallization structure of the PCL. Both scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to characterize the morphology and dispersion of the FeO nanoparticles within the as-synthesized nanocomposites. Results of differential scanning calorimetry (DSC) and polarizing optical microscopy (POM) showed that the crystallization temperature was raised and the spherulites size decreased by the presence of FeO nanoparticles in the nanocomposites due to the heterogeneous nucleation effect. The thermal stability of the PCL was depressed by incorporation of FeO nanoparticles from thermogravimetric analysis (TGA). The superparamagnetic behavior of the PCL/FeO nanocomposites was testified by the superconducting quantum interference device (SQUID) magnetometer analysis. The obtained biodegradable nanocomposites will have a great potential in magnetic resonance imaging contrast and targeted drug delivery. [ABSTRACT FROM AUTHOR]
- Published
- 2013
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