Abstract
In this work, an environmentally friendly, superhydrophobic and durable modified melamine sponge was fabricated through a simple two-step dipping method. Through this strategy, the active carbon (AC) particles and reduced graphene oxide (rGO) were fixed on the melamine sponge skeleton with polydimethylsiloxane (PDMS) glue to form MS/rGO/AC/PDMS sponge, which has a multi-stage pore structure. Water contact angle (WCA) revealed that the as-prepared sponge possessed excellent water repellency up to 164°. Being applied in the field of oil/water separation, MS/rGO/AC/PDMS exhibited excellent oil-water selectivity, high oil sorption ability up to 120 g/g, and separation efficiency of over 99.85%. It is worth noting that under complex environments such as acid-base, fatigue and abrasion, the obtained sponge can maintain original properties, and the water contact angle exceeds 154°. In addition, it has good mechanical stability which can be reused and recovered continuously, making it a potential material for practical applications.
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