Abstract
Indoor air pollution, especially from cooking oil fumes (COFs), has become a serious issue that affects human health. Obtaining filters that can offer high efficiency, high air permeability and good reusability and stability for COFs removal remains a challenge. Herein, a bioinspired vine-like polyethylene terephthalate/cellulose acetate (PET/CA) composite nanofibrous membrane with high filtration performance, high air permeability and enhanced flame retardancy for COFs removal is achieved via a one-step co-electrospinning process. The nanofibrous membrane consists of hierarchically branched nanofibers to offer small pore size (0.48 μm), high porosity (94.75 %) and low packing density (0.22 g m−3), as well as surface superhydrophobicity (water contact angle of 154°) and superoleophilicity (vegetable oil wetting time of 0.21 s). The nanofibrous filter demonstrates high-efficiency COFs removal (>99.5 %), low air resistance (<70 Pa) and good reusability and stability for actual COFs purification. By virtue of the simple fabrication technique and the superiorities in COFs capture, the bioinspired vine-like hierarchical structured nanofibrous membranes have promising applications for oily fumes filtration and air purification in the catering industry.
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