We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
MOF Nanosheet-Functionalized Poly(lactic acid) Meta-membranes for Long-Term Air Purification and Intelligent Monitoring
AI summary Read the abstract
Researchers developed an advanced air filter membrane made from biodegradable polylactic acid enhanced with zinc-based nanosheets that captures over 99% of fine particulate matter. Unlike conventional plastic-based filters that contribute to microplastic pollution, this biodegradable alternative breaks down naturally. The technology could reduce the microplastic burden from air filtration while providing long-lasting, effective air purification.
The wide use of conventional polymeric air filters is causing a dramatically increasing accumulation of plastic and microplastic pollution. The development of poly(lactic acid) (PLA) fibrous membranes for efficient air purification is of important significance but frequently challenged by the rapid decay of filtration performance due to the intrinsically poor electret properties of PLA. Here, we propose an electroactivity promotion methodology, involving the one-step synthesis and homogeneous incorporation of high-dielectric ZIF-8 nanosheets (ZIFNSs), to facilitate interfacial polarization and fiber refinement during electrospinning of PLA nanofibers. The preparative electrospun PLA/ZIFNS meta-membranes exhibited an unusual combination of significantly reduced nanofiber diameter (∼462 nm), enhanced surface potential (approaching 10 kV), and increased surface activity and facilitated the formation of electroactive phases. With well-controlled morphological features, the highly electroactive PLA/ZIFNS meta-membranes exhibited exceptional filtration efficiencies for PM2.5 and PM0.3 (99.2 and 96.0%, respectively) even at the highest airflow rate of 85 L/min, in clear contrast to that of its pure PLA counterpart (only 79.3 and 74.6%). Arising from the increased electroactivity and active contact sites, remarkable triboelectric performance and self-charging mechanisms were demonstrated for the PLA/ZIFNS meta-membranes, contributing to long-term efficient PM0.3 filtration (97.5% for over 360 min). Moreover, as triggered by physiological activities like respiration and speaking, the electroactive PLA/ZIFNS meta-membranes enabled real-time monitoring with high sensitivity and specificity. The proposed strategy affords significant promotion of electroactivity and triboelectric performance for PLA nanofibers, which may motivate the development of ecofriendly protective membranes for respiratory healthcare and real-time monitoring.
More Papers Like This
Bioelectret poly(lactic acid) membranes with simultaneously enhanced physical interception and electrostatic adsorption of airborne PM0.3
AI summary Read the abstract
Researchers developed a biodegradable air filter membrane made from poly(lactic acid) that can capture ultra-fine airborne particles as small as 0.3 micrometers with high efficiency. Unlike traditional plastic-based filters that shed microplastics into the air, this plant-derived material breaks down naturally. This technology could help reduce both airborne particulate exposure and the microplastic pollution created by conventional air filtration products.
Nanopatterned Electroactive Polylactic Acid Nanofibrous MOFilters for Efficient PM0.3 Filtration and Bacterial Inhibition
AI summary Read the abstract
Researchers developed biodegradable polylactic acid nanofibrous filters enhanced with ZIF-8 nanocrystals for efficient air filtration of ultrafine particulate matter. The study suggests that these filters could help address both airborne pollution and the accumulation of microplastic waste from conventional synthetic filter materials.
High-ThroughputParticulateMatter Capturing and MoistureWicking by Hierarchical Janus Poly(lactic acid) Sensing Meta-Membraneswith Gradient Pores and Interfacial Polarization
AI summary Read the abstract
Scientists have created a new type of face mask material that filters out 99.2% of ultrafine air pollution particles while staying breathable and wicking away sweat and moisture better than current masks. Made from plant-based, biodegradable plastic (PLA) instead of traditional petroleum-based materials, this mask design could offer better protection against harmful airborne particles linked to respiratory and cardiovascular problems, while also being kinder to the environment. It even has a built-in feature that can monitor your breathing patterns without needing a battery.
Unlocking nanoplastic removal from landfill leachate - a dual-layer adsorptive PES@PMACZ@MOF & repulsive self-assembled mesoporous silica modified matrix membrane
AI summary Read the abstract
Scientists developed a new filter membrane that can remove almost all micro- and nanoplastics (98.8% to 100%) from landfill wastewater, tiny plastic particles that can leach into groundwater and eventually end up in our drinking water and food supply. This filter is special because it stays effective over repeated use, resists clogging, and works well across different water conditions, making it a promising tool for cleaning up plastic pollution before it spreads further into our environment and bodies.
Fabrication of dual-charged MOF-based ultrafiltration membrane to remove charged nanoplastics from wastewater
AI summary Read the abstract
Researchers developed a new type of water filter membrane that can remove over 99% of nanoplastics from wastewater while maintaining high water flow. The membrane uses metal-organic framework nanoparticles that repel plastic particles through electrical charges and physical filtering. This technology could help prevent nanoplastics, which are too small for conventional filters, from reaching drinking water sources.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.