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Functionalized graphene nanoplatelets (FGNPs) were synthesized through oxidative chlorophosphorylation (OxCh) reaction of graphite and subsequent hydrolysis of obtained chlorophosphonated graphite. Then FGNPs were used as a nanoscale filler to fabricate FGNPs/modified polybutadiene (MPB) hybrid composite (FGNPs/MPB). Fourier-transform infrared spectroscopy found that FGNPs have phosphonate functional groups and FGNPs/MPB has phosphonate and phosphate functional groups. X-ray diffraction showed that the thickness of FGNPs is 13.53 nm and the number of their layers is equal to 40, which are less than graphite’s thickness (37.08) and layers (111). FGNPs show high conductivity and dielectric permittivity than graphite, while FGNPs/MPB has improved electric properties than MPB without filler. Thermal properties of FGNPs/MPB also improve due to the fact that FGNPs achieve a high degree of dispersion with less agglomeration. As observed in the scanning electron microscope images, FGNPs/MPB displays a two-phase morphology with an MPB continuous phase and a dispersed FGNPs phase.

Surface functionalization is an important chemical task that allows to manipulate graphite’s physical and chemical properties. It helps improve graphite’s processability, giving it new prop...

Here is reported the synthesis of o-phenylenediamine functionalized graphite (OPDFG) using the phosphorus trichloride surface modified graphite (PCl3-SMG) and the o-phenylenediamine (OPD). PCl3-SMG was obtained via chlorophosphorylation of graphite for the study. PCl3-SMG and OPDFG were analyzed using ultraviolet-visible (UV-Vis) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, powder X-ray diffraction (XRD) and Scanning Electron Microscope (SEM). UV-Vis analysis shows that OPDFG have higher absorbance than graphite and PCl3-SMG. According to FTIR analysis, PCl3-SMG has –PCl2 functional groups, which shows that PCl3 reacts with sp2 C-H groups on graphite's edge planes during the formation of PCl3-SMG. Synthesis of OPDFG can be explained by a replacement reaction of amine groups of OPD with –PCl2 groups. XRD data show that after modification of graphite with PCl3 and after amine treatment of PCl3-SMG, crystallite sizes of PCl3-SMG and OPDFG decrease. SEM analysis shows that both PCl3-S...