▎ 摘　　要

Design of graphene composite aerogel with intriguing attributes usually complicates the preparation process. It is still challenging to achieve high-performance graphene aerogel in a feasible way. Herein, reduced graphene oxide@cellulose nanocrystals aerogel (rGCA)/ethylene-propylene-diene monomer (EPDM) composites (rGCA/ EPDM) with well-ordered lamellar porous structure and interconnected networks were prepared through a facile strategy of chemical reduction and self-assembly under natural drying condition. Interfacial bonding formed in the composite aerogel, and cellulose nanocrystals (CNCs) acted as reinforcing skeleton and EPDM chains pro-vided crosslinking elastic network in the composite aerogel, which endowed rGCA/EPDM with superior compressibility and recoverability (up to 90 % strain), excellent mechanical flexibility, enhanced EMI SE (24.1 dB) in the X band of 8.2-12.4 GHz and effective adsorption performance for oil/water separation. The hydro-phobic rGCA/EPDM could adsorb various oils and organic solvents from water phase, meanwhile the adsorbed solvents could be recovered by continuous adsorption-desorption process and the adsorption capacity only slightly reduced after 10 adsorption-squeezing or adsorption-volatilization cycles, revealing the good structural stability and recyclable adsorption performance due to its hydrophobicity and robust hierarchical porous structure. Moreover, the composite aerogel could realize real-time adsorption of organic solvent from water surface by pumping force. Such an effective strategy obtaining the composite aerogel exhibits a promising po-tential in oil cleanup and pollution remediation field.