Superhydrophobic/superoleophilic materials often involve complex preparation processes.To solve this problem,inspired by mussel foot protein,polydopamine (PDA) was introduced as a binder to encapsulate silica (SiO2) and firmly bond the superhydrophobic surface to a cellulose filter membrane (FM).The morphology and composition of the modified cellulose filter membrane were investigated using scanning electron microscopy,energy dispersive spectroscopy and X-ray photoelectron spectroscopy.The wettability of the modified cellulose filter membrane was determined by measuring the water contact angle and oil contact angle.The water contact angle was 155.9° and the oil contact angle was 0°,indicating that the modified cellulose filter membrane was superhydrophobic/superoleophilic.The modified cellulose filter membrane also demonstrated chemical stability,anti-fouling capacity and self-cleaning properties.The first separation efficiency and flux of modified cellulose membrane for CCl4 reached 99.96% and 7876L/(m2·h),respectively.It could also be used for continuous oil-water separation,and the separation efficiency could still maintain 99.77% even after 50 cycles.Its excellent performance makes the modified cellulose filtration membrane have a good application prospect for the treatment of oily wastewater in harsh environments.
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