In this work, a novel recyclable, superhydrophobic with water contact angle of 179±0.35°, superoleophilic, and flame-retardant graphene-based polyurethane (PU) sponge was prepared by functionalizing PU with reduced graphene oxide (RGO) and orthoaminophenol (OAP). RGO/OAP/PU sponge demonstrated high sorption capacity, achieving up to 80 times of its own weight for a wide range of organic solvent and oils. Also, the RGO/OAP/PU retained its sorption capacity even after 10 sorption cycles. The appearance and sorption capacity of RGO/OAP/ PU sponge did not change after 60 s burning testwhereas the neat PU burned completelywithin 6 s. Themechanical test suggested that the RGO/OAP/PU sponge is not compressiblewith respect to PU sponge. The volumeof PU decreased from 2.82 to 1.41 cm3 while the RGO/OAP/PU volume (3.53 cm3) did not change.

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