Facile Fabrication of Magnetic, Durable and Superhydrophobic Cotton for Efficient Oil/Water Separation

Abstract

In this paper, we present a facile and efficient strategy for the fabrication of magnetic, durable, and superhydrophobic cotton for oil/water separation. The superhydrophobic cotton functionalized with Fe3O4 magnetic nanoparticles was prepared via the in situ coprecipitation of Fe2+/Fe3+ ions under ammonia solution on cotton fabrics using polyvinylpyrrolidone (PVP) as a coupling agent and hydrophobic treatment with tridecafluorooctyl triethoxysilane (FAS) in sequence. The as-prepared cotton demonstrated excellent superhydrophobicity with a water contact angle of 155.6° ± 1.2° and good magnetic responsiveness. Under the control of the external magnetic field, the cotton fabrics could be easily controlled to absorb the oil from water as oil absorbents, showing high oil/water separation efficiency, even in hot water. Moreover, the cotton demonstrated remarkable mechanical durable properties, being strongly friction-resistant against sandpaper and finger wipe, while maintaining its water repellency. This study developed a novel and efficient strategy for the construction of magnetic, durable, and superhydrophobic biomass-based adsorbent for oil/water separation, which can be easily scaled up for practical oil absorption.

Textiles Functionalized with Copper Oxides: A Sustainable Option for Prevention of COVID-19

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Oil spill cleanup by natural fibers: a review

“…Chen et al (2020) developed hydrophobicoleophilic cotton fabric by treating the surface of the cotton with silica nanoparticles and the water contact angle of the modified cotton was 140°. Yu et al (2019) prepared the magnetic, durable and superhydrophobic cotton fabric for the removal of oil from water. The functionalized cotton fabric with Fe 3 O 4 magnetic nanoparticles was prepared via in situ coprecipitation of Fe 2þ/ Fe 3þ ions under ammonia solution with a coupling agent, Oil spill cleanup by natural fibers polyvinylpyrrolidone and hydrophobic treatment using tridecafluorooctyltriethoxysilane.…”

Facile stearoyl chloride grafted cotton filter fabric and its application in oil-water separation

“…The rst one is uorine-contained materials. Typically, trideca uorooctyl triethoxysilane (FAS) grafted cotton shows superhydrophobicity as well as nice oil absorption capacity [Yu et al 2019]. But the most serious drawback is that uorine-contained materials are environmental unfriendly and di cult degradable, which will hinder their further application.…”