The composites based on plasticized starch and graphene oxide/reduced graphene oxide

► The graphite was oxidized to obtain GO, and GO was reduced to obtain RGO sheet. ► GO and RGO were characterized. ► GO and RGO were used as the fillers of PS matrix in the casting process. ► The properties of GO/PS and RGO/PS composites were researched. ► GO endowed PS with UV shielding, and RGO endowed PS with electrical conductivity.