Journal
POLYMER DEGRADATION AND STABILITY
Volume 94, Issue 9, Pages 1427-1435Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2009.05.023
Keywords
Polyester elastomer; Composite; Biodegradable; Multi-walled carbon nanotubes; Preparation; Cytotoxicity evaluation
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Funding
- China Postdoctoral Science Foundation [20080430307]
- NSF of China [50725310]
- Beijing Natural Science Foundation [2061002]
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Multi-walled carbon nanotube (MWCNT)/poly(glycerol-sebacate-citrate) (PGSC) elastomer composite were prepared and their morphologies, compositions, glass transition temperatures, mechanical properties, water absorption, biodegradation and cytotoxicity were investigated. Results showed that the chemical structures of PGSC elastomers were hardly influenced by the MWCNT loadings, and physical adsorption was thought as the main interaction between the MWCNTs and PGSC matrixes. When the MWCNT loading was 3 wt%, MWCNTs displayed a homogenous dispersion in the matrixes, and the composite's strength and modulus respectively reached 4.4 MPa and 9.2 MPa, increasing by 62.96% and 33.33% than that of pure PGSC matrixes. The degradation rates of the composites tended to decrease with the increase of MWCNT loadings in simulated body fluid (SBF) solution. The composites presented no cytotoxicity especially when the MWCNT loadings were above I wt%. We expect the composites can be used as degradable bio-coatings and tissue engineering scaffolds in future. (C) 2009 Elsevier Ltd. All rights reserved.
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