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Hyperbranched Polymer Dendrimers Embedded in Electrospun Nanofibers for Safe and Sustainable Antibacterial Filtration Materials
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Cationic hyperbranched polymer dendrimers embedded in recycled polyamide nanofibers achieved over 99.8% filtration efficiency and strong antibacterial activity against E. coli and S. aureus without leaching active compounds, meeting FFP3 classification standards. Developing high-performance, metal-free filtration materials is directly relevant to capturing airborne micro- and nanoplastic particles while avoiding secondary chemical contamination.
The global crisis concerning multidrug-resistant microorganisms necessitates the development of innovative antimicrobial strategies that avoid conventional antibiotics and overcome the toxicity and environmental persistence associated with traditional metal-based biocides. This work aims to develop safe and sustainable antibacterial filtration materials by integrating cationic hyperbranched polymer dendrimers (HBP) into electrospun nanofibers. Cationic HBPs were successfully embedded into recycled polyamide 6 nanofibers using industrial needleless electrospinning. Filtration efficiency, assessed against a 0.3 µm paraffin oil aerosol according to EN 149:2001, consistently exceeded 99.8%, meeting and surpassing the FFP3 classification threshold while maintaining low air resistance. The HBP-functionalized nanofibers exhibited pronounced contact-active antibacterial activity against Staphylococcus aureus and Escherichia coli. Quantitative plate count assays confirmed viability reductions of up to 74.1% after 2 h of co-incubation. Crucially, the absence of inhibition zones in agar diffusion tests confirmed that the active polymer was stably embedded within the nanofiber matrix and did not leach. Comprehensive toxicological tests, including cell line and 3D human skin and airway tissue models, confirmed the material's safety for both dermal and respiratory contact. This study presents a scalable, metal-free, and environmentally responsible next-generation filtration system that combines high mechanical efficiency with active antimicrobial functionality.
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Researchers developed electrospun nanofiber membranes made from PVDF-HFP polymer combined with titanium dioxide for use in advanced face masks with photocatalytic antibacterial properties. The study demonstrated that these functionalized nanofiber filters effectively deactivated bacteria while maintaining high filtration performance, offering a potential alternative to conventional mask materials.
Integration Of Synthetic And Biodegradable Polymers Through Green Electrospinning For The Development Of Heterogeneous Nanofiber Layers For Biomedical Applications
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Researchers used green electrospinning to create hybrid nanofiber layers combining synthetic polymers with biodegradable chitosan and cellulose acetate, enhanced with plant extract for antibacterial activity. The resulting fibers degraded more than 60% within 60 days, showed no eco-toxicity, and demonstrated strong antimicrobial performance, making them promising candidates for biomedical and environmental applications.
Advances in electrospun nanofiber-based personal protective equipment for active filtration
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Most face masks today are made from plastic materials that don't break down, shedding microplastics into the environment long after you throw them away. This review rounds up research on a promising alternative: masks made from biodegradable nanofibers (created through a technique called electrospinning) that can filter out germs and pollutants just as well, while some versions even add natural antibacterial ingredients like essential oils or metal particles for extra protection. The takeaway: eco-friendlier masks that protect your health without leaving lasting plastic pollution behind may be on the horizon, though most of this work is still in the research stage rather than on store shelves.
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This review examines electrospun nanofiber membranes as next-generation filtration materials for removing micro- and nanoplastics from water, analyzing their performance advantages over conventional membranes and identifying remaining challenges for practical environmental application.
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