| 초록 |
Poly(D,L-lactide-co-glycolide) 50:50 (PLGA) / graphene oxide (GO) nanocomposite films were prepared with various GO weight fractions. A significant enhancement of mechanical properties of the PLGA / GO nanocomposite films was obtained with GO weight fractions. The incorporation of only 5wt% GO resulted in an ~2.5-fold and ~4.7-fold increase in the tensile strength and Young’s modulus of PLGA, respectively. The thermomechanical behaviour of composite films were investigated by dynamic mechanical analysis (DMA), the results indicated that the values of Tg and storage modulus of the PLGA / GO composites were higher than those of the pristine polymer. In this work, we also studied about the results of their in vitro biodegradation behaviours. PLGA / GO composite films were hydrolyzed at 37 °C for periods up to 49 days. Because of the antibacterial activity of the GO nanosheets, the degradation of the composite films took place more slowly with increasing GO amounts. |
