| 초록 |
Graphene, a one-atom-thick planar sheet of sp2-bonded carbon atom, has strong potential for effective reinforcing material of composites owing to its high chemical stability and strong mechanical strength, and low resistivity. For the excellent properties of graphene to be realized in polymer composites, graphene should be homogeneously dispersed in polymer matrices. However, it is difficult to uniformly disperse graphene or graphene oxide (GO) in polymer matrix, because strong van der Waals attraction between graphene sheets. In this study, we report a new covalent functionalization method of GO to homogeneously disperse functionalized graphene oxide (fGO) in polyethylene terephthalate (PET) matrix. For this purpose, hydrophilic groups in GO are substituted by alkyl groups, and the effect of this functionalization on dispersion of fGO in PET matrix is examined. Consequently, physical properties of fGO/PET film improve much better than that of GO/PET film. |
