Transparent polyimide/graphene oxide nanocomposite with improved moisture barrier property

► Colorless and organo-soluble PI was synthesized via one-step process. ► Blending graphene oxide with PI in DMAc enhances gas barrier property of PI. ► PI/GO nanocomposite exhibits excellent moisture resistance and optical clarity. ► Homogeneous distribution of GO in PI leads to low CTE and low WVTR.