期刊
COMPOSITES PART B-ENGINEERING
卷 72, 期 -, 页码 150-159出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2014.12.003
关键词
Polymer-matrix composites (PMCs); Nano-structures; Magnetic properties; Thermal analysis; Evolved gases analysis
资金
- Romanian National Authority for Scientific Research CNCS-UEFI-SCDI, Project: Interdisciplinary research on multifunctional hybrid particles for bio-requirements INTERBIORES [PN-II-PT-PCCA-2011-3.2-0428, 211/2012]
The study presents the preparation of the new magnetic nanocomposite based on PLGA and magnetite. The PLGA used to obtain the magnetic nanocomposites was synthesized by the copolymerization of lactic acid with glycolic acid, in the presence of tin octanoate [Sn(Oct)(2)] as catalyst, by polycondensation procedure. Magnetite was obtained by co-precipitation from aqueous salt solutions FeCl2/FeCl3. The particles size of magnetite was 420 nm, and the saturation magnetization 62.78 emu/g, while the PLGA/magnetite nanocomposite size was 864 nm and the saturation magnetization 39.44 emu/g. The magnetic nanocomposites were characterized by FT-IR, DLS technique, SEM, VSM and simultaneous thermal analyses (TG-FTIR-MS). The polymer matrix PLGA acts as a shell and carrier for the active component, while magnetite is the component which makes targeting possible by external magnetic field manipulation. Based on the gases resulted by thermal degradation of PLGA copolymer, using the simultaneous analysis TG-FTIR-MS, a possible degradation mechanism was proposed. (C) 2014 Elsevier Ltd. All rights reserved.
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