Bioelectrets in Electrospun Bimodal Poly(lactic acid) Fibers: Realization of Multiple Mechanisms for Efficient and Long-Term Filtration of Fine PMs

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(21), P. 25919 - 25931

Published: May 16, 2023

Despite the great potential in fabrication of biodegradable and eco-friendly air filters by electrospinning poly(lactic acid) (PLA) membranes, filtering performance is frequently dwarfed inadequate physical sieving or electrostatic adsorption mechanisms to capture airborne particulate matters (PMs). Here, using parallel spinning approach, unique micro/nanoscale architecture was established conjugation neighboring PLA nanofibers, creating bimodal fibers electrospun membranes for enhanced slip effect significantly reduce resistance. Moreover, bone-like nanocrystalline hydroxyapatite bioelectret (HABE) exploited enhance dielectric polarization properties PLA, accompanied controlled generation junctions induced microaggregation HABE (10-30 wt %). The incorporated supposed orderly align applied E-field largely promote charging capability surface potential, gradually increasing 7.2 kV from lowest level 2.5 pure PLA. This mainly attributed HABE-induced orientation backbone chains C═O dipoles, as well interfacial charges trapped at interphases HABE-PLA crystalline region-amorphous Given multiple capturing mechanisms, micro/nanostructured PLA/HABE were characterized excellent sustainable performance, e.g., filtration efficiency PM0.3 promoted 59.38% 94.38% after addition 30 % a moderate airflow capacity 32 L/min 30.78 83.75% highest 85 L/min. It interest that pressure drop decreased, arising between ultrafine nanofibers conjugated microfibers. proposed combination nanostructured electret multistructuring strategy offers function integration efficient low resistance are highly useful pursue fully filters.

Language: Английский

---

Preparation of PAN/SiO2/CTAB electrospun nanofibrous membranes for highly efficient air filtration and sterilization

Separation and Purification Technology, Journal Year: 2023, Volume and Issue: 321, P. 124270 - 124270

Published: June 3, 2023

Language: Английский

---

Bio-inspired gradient poly(lactic acid) nanofibers for active capturing of PM0.3 and real-time respiratory monitoring

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 474, P. 134781 - 134781

Published: May 31, 2024

Language: Английский

---

Exploring the potential of a novel electrostatic precipitator as an alternative to air filters in air purifiers

Building and Environment, Journal Year: 2025, Volume and Issue: 270, P. 112535 - 112535

Published: Jan. 6, 2025

Language: Английский

---

Degradable nanofiber for eco-friendly air filtration: Progress and perspectives

Separation and Purification Technology, Journal Year: 2022, Volume and Issue: 306, P. 122642 - 122642

Published: Nov. 14, 2022

Language: Английский

---

Bioelectret poly(lactic acid) membranes with simultaneously enhanced physical interception and electrostatic adsorption of airborne PM0.3

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 458, P. 132010 - 132010

Published: July 6, 2023

Language: Английский

---

Self-Charging, Breathable, and Antibacterial Poly(lactic acid) Nanofibrous Air Filters by Surface Engineering of Ultrasmall Electroactive Nanohybrids

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: unknown

Published: Dec. 4, 2023

Despite the great promise in development of biodegradable and ecofriendly air filters by electrospinning poly(lactic acid) (PLA) nanofibrous membranes (NFMs), as-electrospun PLA nanofibers are generally characterized poor electroactivity smooth surface, challenging exploitation electrostatic adsorption physical interception that need for efficient removal pathogens particulate matters (PMs). Herein, a combined "electrospinning–electrospray" strategy was disclosed to functionalize direct anchoring highly dielectric BaTiO3@ZIF-8 nanohybrids (BTO@ZIF-8), conferring simultaneous promotion surface roughness, electret properties (surface potential as high 7.5 kV), self-charging capability (∼190% increase tribo-output voltage compared pure PLA). Benefiting from well-tailored morphology increased electroactivity, electrospun–electrosprayed PLA/BTO@ZIF-8 exhibited excellent PM-capturing performance (up 96.54% PM0.3 99.49% PM2.5) while providing desirable resistance (only 87 Pa at 32 L/min) due primarily slip flow molecules over nanohybrid protrusions. This accompanied antibacterial (99.9% inhibition against both Staphylococcus aureus Escherichia coli), arising presumably synergistic effects enhanced reactive oxygen species (ROS) generation, plentiful ion release, charges. Our proposed opens up pathways afford exceptional combination high-efficiency low-resistance filtration, performance, mechanical robustness without sacrificing biodegradation profiles NFMs, holding implications long-term healthcare.

Language: Английский

---

Electric-field activating on-surface tailored (OST) coarse polyester fibers for efficient airborne particle removal: Interfacial morphologies and electrical response

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 353, P. 128291 - 128291

Published: June 15, 2024

Language: Английский

---

Biodegradable Electrospun Nanofiber Membranes as Promising Candidates for the Development of Face Masks

International Journal of Environmental Research and Public Health, Journal Year: 2023, Volume and Issue: 20(2), P. 1306 - 1306

Published: Jan. 11, 2023

Aerosol particles, such as the widespread COVID-19 recently, have posed a great threat to humans. Combat experience has proven that masks can protect against viruses; however, epidemic in recent years caused serious environmental pollution from plastic medical supplies, especially masks. Degradable filters are promising candidates alleviate this problem. nanofiber filters, which developed by electrospinning technique, achieve superior filtration performance. This review focuses on basic introduction air filtration, general aspects of face masks, and nanofibers. Furthermore, progress state art degradable electrospun been summarized, silk fibroin (SF), polylactic acid (PLA), chitosan, cellulose, zein. Finally, challenges future development highlighted.

Language: Английский

---

Simultaneous Capture and Inactivation of Airborne Bacteria by a Dual-Zone Electrostatically Actuated Filter

ACS ES&T Engineering, Journal Year: 2024, Volume and Issue: 4(4), P. 987 - 994

Published: March 4, 2024

Maintaining indoor air quality is essential for human health, and the threat posed by bioaerosols emphasizes efficient capture inactivation technologies in ventilation systems. However, existing struggle to inactivate simultaneously with low resistance integrated make them inconvenient practical applications. To address this challenge, we developed a dual-zone electrostatically actuated filter which airborne bacteria are first charged ions generated charging zone then captured polarized fibers inactivated electrostatic field of polarizing zone. Benefiting from enhanced force, efficiencies Escherichia coli (Gram-negative) Staphylococcus epidermidis (Gram-positive) aerosols 0.3–0.5 μm diameter increased ∼25.4 ∼98.4% at 0.5 m/s filtering velocity while was maintained only 4.5 Pa. The efficiency remained steadily high 30 days, an average 93.8%. Moreover, combination continued ion flow exposure significantly improved against E. S. ∼98.7 ∼96.1%, respectively, instead allowing bacterial reproduction on coarse without actuation. proposed exhibits great potential incorporation into energy-saving systems, offering high-efficiency antimicrobial performance as well resistance.

Language: Английский

---