A High‐Performance and Fully Recyclable Supramolecular Nanofibrous Membrane for Multifunctional Air Filtration

ABSTRACT Developing recyclable, multifunctional air purification materials that minimize environmental impact represents a grand challenge in the pursuit of carbon neutrality. Herein, a multifunctional air filtration membrane is prepared through a thermally induced precursor crystallization (TIPC) process that drives the self‐assembly of a supramolecular nanofibrous network from melamine (MA) and trimesic acid (TMA). Graphene oxide (GO) nanosheets, strategically incorporated as heterogeneous nucleation‐templating agents, are critical for tailoring the hierarchical network morphology and endowing the membrane with multiple synergistic properties. The resulting membrane delivers exceptional particulate matter (PM) filtration efficiency (99.48% for PM _1.0 ), potent antimicrobial activity against ( Escherichia coli ) E. coli (99.4%) and ( Staphylococcus aureus ) S. aureus (99.8%), and a high formaldehyde removal capacity (95%). Beyond purification, the membrane also demonstrates effective thermal management for wearer comfort and superior UV‐blocking (< 0.4% transmittance). Crucially, the inherent thermoreversibility of the supramolecular network enables complete, closed‐loop recycling of the membrane using only green solvents under mild conditions. This work presents a comprehensive and sustainable strategy for preparing advanced air filtration materials, demonstrating that high performance, integrated multifunctionality, and complete lifecycle circularity can be co‐designed from the molecular level up.