▎ 摘　　要

New polyamide 66/graphene oxide (GO)-grafted aliphatic-aromatic polyamide (polyamideimide) (PAI) (PA66/GOF) composites nanofibers were successfully prepared via electrospinning method for the first time. An polyamide imide (PAI) was synthesized using polycon-densation reaction from a dicarboxylic acid and a diamine based on 4,4'-(4,4'-isopropylidenediphenyl-1,1'-diyldioxy) dianiline, and characterized by( 1)HNMR and FTIR. Morphological, structural, thermal and mechanical characteristics of the nanocomposite fibers were investigated by means of SEM, TEM, WAXD, DMTA and TGA techniques. Composites nanofibers of PA66/GO, PA66/PAI and PA66/GOF with smooth surface, uniform structure as well as with diameter ranging from 195 to 784 nm were obtained. The GO incorporation caused a reduction in the nanofibers diameters. The TEM images showed that the GO was well dispersed in the PA66 nanofibers without significant aggregation. An approximately 10 degrees C temperature increase in the glass transition temperature of PA66 was achieved by addition of 0.5 wt% of PAI, resulting from aliphatic-aromatic structure of PAI. By the TGA results, an increase about 40 degrees C was observed in the thermal stability of PA66/PAI composite nanofibers in comparison with that of pure PA66 nanofibers. [GRAPHICS]