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 test whereas the neat PU burned completely within 6 s. The mechanical test suggested that the RGO/OAP/PU sponge is not compressible with respect to PU sponge. The volume of PU decreased from 2.82 to 1.41 cm³ while the RGO/OAP/PU volume (3.53 cm³) did not change.

在这项工作中，通过使用还原型氧化石墨烯（RGO）和邻氨基苯酚（OAP）对PU进行官能化，制备了一种新型的可回收，超疏水，水接触角为179±0.35°，超亲油且阻燃的石墨烯基聚氨酯（PU）海绵。 。RGO / OAP / PU海绵具有极高的吸附能力，对于各种有机溶剂和油类，其吸附能力是其自重的80倍。同样，RGO / OAP / PU甚至在10个吸附循环后仍保持其吸附能力。RGO / OAP / PU海绵的外观和吸附能力在60 s燃烧测试后没有变化，而纯净的PU在6 s内完全燃烧。机械测试表明，RGO / OAP / PU海绵相对于PU海绵不可压缩。PU的体积从2.82降至1.41 cm ³而RGO / OAP / PU的体积（3.53 cm ³）没有变化。