| 초록 |
Biodegradable poly(L-lactic acid) (PLA) was successfully covalently grafted onto the surfaces of the graphene oxide (GO) by one step based on in situ polycondensation of the commercially available L-lactic acid monomers. The resulting poly(L-lactic acid)-grafted graphene oxide (GO-g-PLA) were characterized with Fourier transform Infrared (FT-IR) spectroscopy, X-ray diffractions (XRD), and transmission electron microscopy (TEM). Nanocomposites of Chitosan (CS) reinforced with GO and GO-g-PLA were prepared by the casting and solvent evaporation method. Morphological, thermal, and mechanical characteristics of CS/GO-g-PLA nanocomposites were investigated as a function of the GO content and compared with those of neat CS and CS/GO nanocomposites. It was clearly evidenced that the fuctionalization of GO with this method enhanced its dispersion and interfacial interactions with the CS matrix and thus improved the final thermostability and mechanical properties of nanocomposites. |
