Myricetin-enhanced PTF nanofibers for PM0.3 filtration and bacterial inactivation
Severe air pollution and pathogenic aerosol transmission pose critical threats to human health, necessitating the development of sustainable, multifunctional filtration materials beyond traditional non-wovens. Herein, a fully bio-based, multifunctional nanofibrous membrane is engineered by integrating the natural antibacterial agent myricetin (Myr) into a poly(trimethylene 2,5-furandicarboxylate) (PTF) matrix by way of electrospinning. The incorporation of Myr modulates the solution viscosity and conductivity, refining the fiber diameter to form a robust, ultra-fine three-dimensional porous architecture (PTF@Myr). This optimized structure balances filtration efficiency and air permeability, achieving a 99.30% capture efficiency for PM0.3 at a low pressure drop of 83 Pa. Synergistically, the membrane exhibits potent biological activity, delivering sterilization rates of 99.85% against Escherichia coli and 99.99% against Staphylococcus aureus by disrupting bacterial cell walls. Furthermore, the enhanced hydrophobicity and lipophilicity of the membrane enable exceptional oil–water separation performance, characterized by a high permeation flux of 3706 l·m−2·h−1, a separation efficiency of 99.60%, and excellent cyclic stability. This work establishes a facile, green strategy for fabricating degradable, high-performance barriers, offering a promising paradigm for next-generation environmental purification and personal protection applications.