Fabrication and properties of functionalized graphene nanoribbons-nanographite/EVA composite films

The dispersion of nanographite (CNPs) in aqueous solution was first modified by sodium dodecyl sulfate (SDS) in order to prepare uniformly distributed CNPs on the surface of functioned graphene nanoribbons (EGNRs). Afterwards, the EGNRs_75%-CNPs/EVA composite films were prepared by solution coating method on a coating machine. The morphology and properties of EGNRs_75%-CNPs/EVA composite films were investigated by FTIR, XRD, XPS, FE-SEM, TEM, oxygen transmission rate and high resistance meter. The results show that the conductive network of EGNRs_75%-CNPs can be observed after being loaded with CNPs, which is beneficial to the dispersion of EGNRs_75%-CNPs in EVA matrix. When the mass fraction of EGNRs_75%-CNPs is 1%, compared with that of the pure EVA, the oxygen transmission rate of EGNRs_75%-CNPs/EVA composite films is reduced by 67.6%, thus the barrier property has improved deeply. EGNRs_75%-CNPs/EVA composite films' conductivity has been improved by 8 orders of magnitude as EGNRs_75%-CNPs mass fraction is 0.8% because of the formation of 3D conductive network, which exhibit the excellent room temperature conductivity.