| 초록 |
Graphenes, a flat monolayer of carbon atoms tightly packed into a two-dimensional honeycomb lattice, offer high mechanical and electrical properties when they are used as fillers in polymer nanocomposites. In this study, the graphenes were synthesized chemically by Hummers and Offeman method. To take full advantage of polymer nanocomposites with graphenes homogeneous dispersion and strong interfacial adhesion are essential and these can be achieved by an effective functionalization of graphenes. Therefore, in this study, amine groups were introduced onto the surfaces of the graphenes via treating them with 4-aminobenzoic acid in polyphosphoric acid. AFM and FE-SEM, one of the most direct methods to quantify the degree of exfoliation of graphene sheets, were employed. FT-IR spectroscopy and TGA were also used to confirm the functionalization. The analyses showed that the functionalization of the graphenes was performed successfully. |
