An unusual superhydrophilic/superoleophobic sponge for oil-water separation

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Development of porous materials with anti-fouling and remote controllability is highly desired for oil-water separation application yet still challenging.Herein,to address this challenge,a sponge with unusual superhydrophilicity/superoleophobicity and magnetic property was fabricated through a dip-coating process.To exploit its superhydrophilic/superoleophobic property,the obtained sponge was used as a reusable water sorbent scaffold to collect water from bulk oils without absorbing any oil.Owing to its magnetic property,the sponge was manipulated remotely by a magnet without touching it directly during the whole water collection process,which could potentially lower the cost of the water collection process.Apart from acting as a water-absorbing material,the sponge can also be used as affiliation material to separate water from oil-water mixture and oil in water emulsion selectively,when fixed into a cone funnel.This research provides a key addition to the field of oil-water separation materials.
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