Enhancement of nuclear radiation shielding properties of silicone rubber with -ray irradiation induced graphene oxide modified carbonyl iron powder hybrid fillers

In this study the graphene oxide modified carbonyl iron (GO-CI) was prepared by ?-ray irradiation, which was added to silicone rubber composites to enhance the nuclear radiation shielding performances. X-ray diffraction (XRD) characterization result showed the structure and morphology of the obtained GO-CI nanocomposites. The mixture of GO/CI and the hybrid GO-CI were individually incorporated into the vinyl-terminated polydimethylsiloxane (Vi-PDMS) to prepare referenced SR/GO/CI and SR/GO-CI composites. Compared with SR/GO/CI, the SR/GO-CI exhibited better thermal conduction and mechanical recovery properties. Moreover, the ?-ray radiation shielding ability of SR/GO-CI is much higher than that of pristine SR/GO/CI. CI particles are coated by GO nanosheets to increase surface area to prevent sedimentation of CI. It implies that SR-GO/CI composite would have potential application as the radiation hardening material with thermal conductive and nuclear radiation shielding function.