▎ 摘　　要

In this study, novel poly(imide-ethylene glycol) (PIEG) was prepared via polycondensation of ethylenediaminetetraacetic dianhydride, 4-aminophenyl sulfone, and poly(ethylene glycol) bis(amine). Later, thermally stable and mechanically robust undoped and acid-doped proton exchange membranes were prepared using the graphene oxide (GO) nanofiller. Field emission scanning electron microscope revealed a unique hexagonal imprinted morphology of the fractured surface. Increasing the GO content from 1 to 5wt% increased tensile strength (59.7-65.9MPa) and the modulus (20.3-23.9GPa) of the undoped PIEG/GO series. Thermal properties of the undoped PIEG/GO 1-5 membranes were also higher, i.e., T-10=438-487 degrees C. However, dop-PIEG/GO 1-5 membranes have a higher ion exchange capacity (IEC) of 2.4-2.9mmol/g and proton conductivity 1.8-2.7 S cm(-1) (94% RH).