Porous carbon foam based on coassembled graphene and adenine-polyimide for electromagnetic interference shielding

In this work, an ultralight porous carbon foam with excellent electromagnetic interference (EMI) shielding properties was successfully prepared derived from coassembly of graphene oxide and the adenine-polyimide. The structure and performance of the coassembled carbon foam were studied by SEM, XRD, Raman spectroscopy, XPS, etc. The introduction of graphene is conducive to the construction of a conductive network, the retention of nitrogen, the preferred conversion of N-X nitrogen, the increase in porosity, and the graphitization of the carbon layer. The carbon foam showed high electrical conductivity (0.22–0.55 S/cm). In the X-band (8.2–12.4 GHz), outstanding EMI performance was obtained in the values of EMI SE (48.96 dB), SSE (8370.8 dB cm 3 /g), and SSE/d (19789 dB cm 2 /g). Furthermore, the carbon foams showed compression recoverability and absorption capability for organic solvents. • The carbon foam co-assembled of nitrogen rich polyimide and GO (GACF) was prepared. • The light-weight foam exhibited excellent EMI properties. • GO enhanced the N-fixation and N-X nitrogen conversion of GACF foams.