Low temperature microwave fabrication of three-dimensional graphene/polyimide foams with flexibility strain responsivity

The mechanical brittleness and structure collapse of three-dimensional (3D) graphene composite construction is still an enormous issue in flexible performance of complex. In addition, low temperature and efficient process become increasingly significant and noticeable in field of semiconductor device to prevent from huge resource waste and energy consumption. Herein, we report a special method to prepare 3D graphene/polyimide (rGO/PI) aerogel with low temperature and rapid procedure. The aerogel is synthesized by introducing water-soluble polyamic acid ionic salt (PAS) and ice-templating directional solidification to establish unique oriented structure, and by energy-efficient microwave to realize low temperature and rapid imidization. The preparative rGO/PI nanocomposite aerogels hold excellent electrical conductivity, desirable flexibility, superior pressure-responsive properties, remarkable compression sensitivity and durability, so that adapt to multifarious deformations with huge potential for flexible wearable devices.