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摘要
Air filtration is vital for passive pollution control toward advanced manufacturing industries and human health protection. However, large-scale air-filter utilization is limited by high energy costs. Therefore, it is crucial to develop filter media that exhibit a high removal efficiency, low pressure drop, and stable biocidal effects. This study reports an efficient and scalable bottom-up approach for fabricating shellac-based glass fiber matrices with bioprotective traps (GFMs-traps) with tunable conformal micro/nanostructures, superhydrophobicity, and biocidal functions. The synthesis, which involves freeze-drying-free ice-shellac double-template formation, perfluorosilane-based grafting, and filtration, eliminates capillary-force-induced micro/nanofibrous cluster formation. Theoretical modeling and experimental results indicate that the air cleaning and biocidal properties of the GFMs-traps can be attributed to their uniformly distributed micro/nanofibrous structures and stable nanoparticle (NP) coatings (AgNPs, CuNPs, and TiO2NPs). The GFMs-traps exhibit integrated air cleaning, with excellent filtration performance at the most penetrating particle size (99.97%, 234 Pa), superhydrophobicity (& GE;150 & DEG;), a high virus-filtration efficiency (99.995%), and good antibacterial and antiviral activity. Additionally, a commercial air purifier comprising a GFMs-trap filter exhibits high potential for commercial applications. The facile strategy for fabricating high-performance bioprotective filter media reported here may facilitate advanced large-scale air filtration applications in the future. @@@ This study reports the efficient and scalable fabrication of shellac-based glass fiber matrices with bioprotective traps (GFMs-traps) for integrated air cleaning by facile freeze-drying-free ice-shellac double-template formation, perfluorosilane-based grafting, and filtration. The GFMs-traps exhibit hydrophobic properties, biocidal functions, and an excellent filtration performance. image
