Journal
POLYMER DEGRADATION AND STABILITY
Volume 96, Issue 7, Pages 1187-1193Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2011.04.018
Keywords
Poly(L-lactic acid); Calcium carbonate; Biomineralization; Hybrids; UV-resistance
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Funding
- National Science Foundation of China [210722221]
- Graduate University of CAS [095101CY00]
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences [KF2008-04]
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The aim of this investigation is to obtain a polymer-based hybrid material with biodegradability, biocompatibility, and good mechanical properties and this object was realized via, in-situ introduction of the unmodified calcium carbonate (CaCO3) into a poly(L-lactic acid) (PLLA) matrix. As verified by the measurements from scanning electron microscopy (SEM), optical microscopy, dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA), the hybrid films which possesses a uniform dispersion of calcium carbonate CaCO3 in nano-meter scale, mechanically robustness and thermal stability could be fabricated by a mineralization-alike process. For example, the storage modulus increases from 441 MPa of neat PLLA to 1034 MPa of hybrid film containing 2% (w/w) CaCO3. In addition, the hybrid films display a significant improvement in its UV-exposure resistance. (C) 2011 Elsevier Ltd. All rights reserved.
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