Abstract
Polypyrrole (PPY) spherical particles synthesized using carbon dots as an efficient catalyst were strongly embedded on fluorinated nonwoven fabric by ultrasonication to form a membrane with high hydrophilicity. An optimal amount of PPY adhered to the membrane after 30 min of sonication enhanced the overall membrane area with high hydrophilicity. Oil with high hydrophobicity was repelled by the resulting membrane, whereas water was freely penetrated and diffused from the membrane. The membrane exhibited good reusability and efficiency for the recovery of oil from a cooking oil–water mixture within 30 s. The incorporation of PPY in the fluorinated fabric imparts significant antibacterial properties against two common pathogens, Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive). The anti-biofouling membrane could pave the way for its potential application to separate spilled oil from contaminated waters, comprising different microorganisms and living species. The novelty of this manuscript is described in a new system, the fabrication of PPY membranes with two important properties: biocidal and oil/water separation.
Highlights
Oil spill incidents occur during storage, transportation, and extrac tion, which are considered major environmental issues with serious long-lasting health and ecological effects
Hydrophilic pores in a polymer-coated membrane are smaller compared to the oil droplet, i.e., water can infuse through the membrane
Oil droplets remain on the membrane due to their larger size and the repulsive capillary force applied via the pores [23,24,25,26]
Summary
Oil spill incidents occur during storage, transportation, and extrac tion, which are considered major environmental issues with serious long-lasting health and ecological effects. A fast and simple step to remove the bulk oil is an important route to avoid further environmental pollution and the spread of contaminated water. Among such methods, the absorption process via polymer materials has been considered applicable due to its straightforward operation, no secondary water contamination, and energy conservation [10,11,12,13,14]. Polymer-coated filters provide an inexpensive, environmentally friendly, and effortless way to separate oil from contaminated water without chemical additives. Its other distinct features include flexi bility, adjustable electrical conductivity, ease of processing, and low toxicity [24,29,30,31]
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