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Fabrication of microplastic-free biomass-based masks: Enhanced multi-functionality with all-natural fibers
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Researchers developed a new biodegradable face mask made entirely from natural plant and animal fibers, eliminating the microplastic shedding associated with conventional disposable masks. The mask achieved 95.9% filtration efficiency, strong antibacterial performance against common bacteria, and could even detect ammonia levels in breath for health monitoring. This microplastic-free design offers a more sustainable alternative to standard surgical masks.
With the coronavirus-2019 epidemic, disposable surgical masks have become a common personal protective necessity. However, off-the-shelf masks have low filtration efficiency and short service life and can only physically isolate pathogens, easily leading to secondary infection and cross-infection between users. Additionally, they produce debris and microplastics, which can be inhaled by the human body and cause serious diseases. To address this, this study introduced a brand-new, microplastic-free, long-life, biodegradable, self-disinfecting, and gas-sensitive mask made of basal dialdehyde-chitosan crosslinked animal-collagen/plant composite fibers (CP-Mask) with an asymmetric bilayer structure using scalable paper-processing technology. The CP-Mask demonstrated outstanding filtration performance (95.9 %) for particulate matter with various sizes and constantly maintained filtration efficiency even after 20 friction cycles. The CP-Mask also exhibited stable and lasting antibacterial properties, with significant inhibition rates of 99.21 % for Staphylococcus aureus and 98.86 % for Escherichia coli and could effectively filter bacterial aerosols. In addition, CP-Mask realized the real-time detection of respiratory ammonia concentration and timely identified the ammonia level. The average response value was 68.26 %, and the average response time was 159.3 s, presenting good circulatory stability and is suitable for early diagnosis of ammonia-related diseases. Breakthrough, the origin of natural ingredients, fundamentally makes CP-Mask less likely to emit microplastics than commercially available masks and endows it with complete biodegradability in soil within three months, eliminating the risk of microplastic inhalation from the source. The proposed CP-Mask provides a new idea to facilitate personal health monitoring and portability of medical protection equipment regarding biocompatibility, biodegradability, self-disinfection, and ammonia sensing ability.
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Antiviral/antibacterial biodegradable cellulose nonwovens as environmentally friendly and bioprotective materials with potential to minimize microplastic pollution
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Biodegradable cellulose nonwoven materials incorporating antiviral and antibacterial agents were developed as a sustainable alternative to polypropylene face masks, demonstrating comparable filtration performance with significantly faster environmental degradation, reducing the microplastic pollution burden of disposable PPE.
Tuneable and biodegradable poly(ester amide)s for disposable facemasks
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Scientists developed biodegradable face mask filters made from novel bio-based poly(ester amide) polymers that fully degrade within 35 days. The filters matched the particle capture efficiency and breathability of commercial mask filters, offering a more environmentally friendly alternative to standard disposable masks that contribute to microplastic pollution.
Development of reusable cloth mask with nanoparticle filtration efficiency greater than 95%
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Researchers developed a reusable cloth mask with nanoparticle filtration efficiency greater than 95%, motivated by the environmental concerns of single-use surgical and respirator masks that shed microplastic fibers, evaluating the novel mask material's filtration performance against respiratory droplets and particulates.
High-ThroughputParticulateMatter Capturing and MoistureWicking by Hierarchical Janus Poly(lactic acid) Sensing Meta-Membraneswith Gradient Pores and Interfacial Polarization
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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.
Tunable and Biodegradable Poly(Ester Amide)s for Disposable Facemasks
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Researchers synthesized seven novel poly(ester amide) (PEA) polymers from biosourced materials for use as biodegradable disposable facemask components, addressing microplastic pollution from conventional disposable masks. Two PEA grades achieved full biodegradation within 35 days and were compatible with electrospinning, producing ultra-thin filter fibers with microparticle capture efficiency and air permeability comparable to commercial filters.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.